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* Merge tag 'kbuild-v4.20-2' of ↵Linus Torvalds2018-11-035-32/+7
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - clean-up leftovers in Kconfig files - remove stale oldnoconfig and silentoldconfig targets - remove unneeded cc-fullversion and cc-name variables - improve merge_config script to allow overriding option prefix * tag 'kbuild-v4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kbuild: remove cc-name variable kbuild: replace cc-name test with CONFIG_CC_IS_CLANG merge_config.sh: Allow to define config prefix kbuild: remove unused cc-fullversion variable kconfig: remove silentoldconfig target kconfig: remove oldnoconfig target powerpc: PCI_MSI needs PCI powerpc: remove CONFIG_MCA leftovers powerpc: remove CONFIG_PCI_QSPAN scsi: aha152x: rename the PCMCIA define
| * kbuild: remove cc-name variableMasahiro Yamada2018-11-021-4/+0
| | | | | | | | | | | | | | | | | | | | There is one more user of $(cc-name) in the top Makefile. It is supposed to detect Clang before invoking Kconfig, so it should still be there in the $(shell ...) form. All the other users of $(cc-name) have been replaced with $(CONFIG_CC_IS_CLANG). Hence, scripts/Kbuild.include does not need to define cc-name any more. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * kbuild: replace cc-name test with CONFIG_CC_IS_CLANGMasahiro Yamada2018-11-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Evaluating cc-name invokes the compiler every time even when you are not compiling anything, like 'make help'. This is not efficient. The compiler type has been already detected in the Kconfig stage. Use CONFIG_CC_IS_CLANG, instead. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Acked-by: Paul Burton <paul.burton@mips.com> (MIPS) Acked-by: Joel Stanley <joel@jms.id.au>
| * merge_config.sh: Allow to define config prefixPetr Vorel2018-11-011-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | with CONFIG_ environment variable. merge_config.sh uses CONFIG_ which is used in kernel and other projects. There are some projects which use kconfig with different prefixes (e.g. buildroot: BR2_ prefix). CONFIG_ variable is already used for this purpose in kconfig binary (scripts/kconfig/lkc.h), let's use the same rule for in merge_config.sh. Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Petr Vorel <petr.vorel@gmail.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * kbuild: remove unused cc-fullversion variableMasahiro Yamada2018-11-011-4/+0
| | | | | | | | | | | | | | The last user of cc-fullversion was removed by commit f2910f0e6835 ("powerpc: remove old GCC version checks"). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * kconfig: remove silentoldconfig targetMasahiro Yamada2018-11-011-8/+1
| | | | | | | | | | | | | | | | As commit 911a91c39cab ("kconfig: rename silentoldconfig to syncconfig") announced, it is time for the removal. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| * kconfig: remove oldnoconfig targetMasahiro Yamada2018-11-012-15/+1
| | | | | | | | | | | | | | As commit 312ee68752fa ("kconfig: announce removal of oldnoconfig if used") announced, it is time for the removal. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* | Merge tag 'compiler-attributes-for-linus-4.20-rc1' of ↵Linus Torvalds2018-11-021-0/+1
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | https://github.com/ojeda/linux Pull compiler attribute updates from Miguel Ojeda: "This is an effort to disentangle the include/linux/compiler*.h headers and bring them up to date. The main idea behind the series is to use feature checking macros (i.e. __has_attribute) instead of compiler version checks (e.g. GCC_VERSION), which are compiler-agnostic (so they can be shared, reducing the size of compiler-specific headers) and version-agnostic. Other related improvements have been performed in the headers as well, which on top of the use of __has_attribute it has amounted to a significant simplification of these headers (e.g. GCC_VERSION is now only guarding a few non-attribute macros). This series should also help the efforts to support compiling the kernel with clang and icc. A fair amount of documentation and comments have also been added, clarified or removed; and the headers are now more readable, which should help kernel developers in general. The series was triggered due to the move to gcc >= 4.6. In turn, this series has also triggered Sparse to gain the ability to recognize __has_attribute on its own. Finally, the __nonstring variable attribute series has been also applied on top; plus two related patches from Nick Desaulniers for unreachable() that came a bit afterwards" * tag 'compiler-attributes-for-linus-4.20-rc1' of https://github.com/ojeda/linux: compiler-gcc: remove comment about gcc 4.5 from unreachable() compiler.h: update definition of unreachable() Compiler Attributes: ext4: remove local __nonstring definition Compiler Attributes: auxdisplay: panel: use __nonstring Compiler Attributes: enable -Wstringop-truncation on W=1 (gcc >= 8) Compiler Attributes: add support for __nonstring (gcc >= 8) Compiler Attributes: add MAINTAINERS entry Compiler Attributes: add Doc/process/programming-language.rst Compiler Attributes: remove uses of __attribute__ from compiler.h Compiler Attributes: KENTRY used twice the "used" attribute Compiler Attributes: use feature checks instead of version checks Compiler Attributes: add missing SPDX ID in compiler_types.h Compiler Attributes: remove unneeded sparse (__CHECKER__) tests Compiler Attributes: homogenize __must_be_array Compiler Attributes: remove unneeded tests Compiler Attributes: always use the extra-underscores syntax Compiler Attributes: remove unused attributes
| * | Compiler Attributes: enable -Wstringop-truncation on W=1 (gcc >= 8)Miguel Ojeda2018-09-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 217c3e019675 ("disable stringop truncation warnings for now") disabled -Wstringop-truncation since it was too noisy. Having __nonstring available allows us to let GCC know that a string is not meant to be NUL-terminated, which helps suppressing some -Wstringop-truncation warnings. Note that using __nonstring actually triggers other warnings (-Wstringop-overflow, which is on by default) which may be real problems. Therefore, cleaning up -Wstringop-truncation warnings also buys us the ability to uncover further potential problems. To encourage the use of __nonstring, we put the warning back at W=1. In the future, if we end up with a fairly warning-free tree, we might want to enable it by default. Tested-by: Sedat Dilek <sedat.dilek@gmail.com> # on top of v4.19-rc5, clang 7 Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
* | | Merge tag 'stackleak-v4.20-rc1' of ↵Linus Torvalds2018-11-013-0/+488
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull stackleak gcc plugin from Kees Cook: "Please pull this new GCC plugin, stackleak, for v4.20-rc1. This plugin was ported from grsecurity by Alexander Popov. It provides efficient stack content poisoning at syscall exit. This creates a defense against at least two classes of flaws: - Uninitialized stack usage. (We continue to work on improving the compiler to do this in other ways: e.g. unconditional zero init was proposed to GCC and Clang, and more plugin work has started too). - Stack content exposure. By greatly reducing the lifetime of valid stack contents, exposures via either direct read bugs or unknown cache side-channels become much more difficult to exploit. This complements the existing buddy and heap poisoning options, but provides the coverage for stacks. The x86 hooks are included in this series (which have been reviewed by Ingo, Dave Hansen, and Thomas Gleixner). The arm64 hooks have already been merged through the arm64 tree (written by Laura Abbott and reviewed by Mark Rutland and Will Deacon). With VLAs having been removed this release, there is no need for alloca() protection, so it has been removed from the plugin" * tag 'stackleak-v4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: arm64: Drop unneeded stackleak_check_alloca() stackleak: Allow runtime disabling of kernel stack erasing doc: self-protection: Add information about STACKLEAK feature fs/proc: Show STACKLEAK metrics in the /proc file system lkdtm: Add a test for STACKLEAK gcc-plugins: Add STACKLEAK plugin for tracking the kernel stack x86/entry: Add STACKLEAK erasing the kernel stack at the end of syscalls
| * | | stackleak: Allow runtime disabling of kernel stack erasingAlexander Popov2018-09-041-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce CONFIG_STACKLEAK_RUNTIME_DISABLE option, which provides 'stack_erasing' sysctl. It can be used in runtime to control kernel stack erasing for kernels built with CONFIG_GCC_PLUGIN_STACKLEAK. Suggested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Alexander Popov <alex.popov@linux.com> Tested-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Kees Cook <keescook@chromium.org>
| * | | fs/proc: Show STACKLEAK metrics in the /proc file systemAlexander Popov2018-09-041-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce CONFIG_STACKLEAK_METRICS providing STACKLEAK information about tasks via the /proc file system. In particular, /proc/<pid>/stack_depth shows the maximum kernel stack consumption for the current and previous syscalls. Although this information is not precise, it can be useful for estimating the STACKLEAK performance impact for your workloads. Suggested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Alexander Popov <alex.popov@linux.com> Tested-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Kees Cook <keescook@chromium.org>
| * | | gcc-plugins: Add STACKLEAK plugin for tracking the kernel stackAlexander Popov2018-09-043-0/+449
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The STACKLEAK feature erases the kernel stack before returning from syscalls. That reduces the information which kernel stack leak bugs can reveal and blocks some uninitialized stack variable attacks. This commit introduces the STACKLEAK gcc plugin. It is needed for tracking the lowest border of the kernel stack, which is important for the code erasing the used part of the kernel stack at the end of syscalls (comes in a separate commit). The STACKLEAK feature is ported from grsecurity/PaX. More information at: https://grsecurity.net/ https://pax.grsecurity.net/ This code is modified from Brad Spengler/PaX Team's code in the last public patch of grsecurity/PaX based on our understanding of the code. Changes or omissions from the original code are ours and don't reflect the original grsecurity/PaX code. Signed-off-by: Alexander Popov <alex.popov@linux.com> Tested-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Kees Cook <keescook@chromium.org>
| * | | x86/entry: Add STACKLEAK erasing the kernel stack at the end of syscallsAlexander Popov2018-09-041-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The STACKLEAK feature (initially developed by PaX Team) has the following benefits: 1. Reduces the information that can be revealed through kernel stack leak bugs. The idea of erasing the thread stack at the end of syscalls is similar to CONFIG_PAGE_POISONING and memzero_explicit() in kernel crypto, which all comply with FDP_RIP.2 (Full Residual Information Protection) of the Common Criteria standard. 2. Blocks some uninitialized stack variable attacks (e.g. CVE-2017-17712, CVE-2010-2963). That kind of bugs should be killed by improving C compilers in future, which might take a long time. This commit introduces the code filling the used part of the kernel stack with a poison value before returning to userspace. Full STACKLEAK feature also contains the gcc plugin which comes in a separate commit. The STACKLEAK feature is ported from grsecurity/PaX. More information at: https://grsecurity.net/ https://pax.grsecurity.net/ This code is modified from Brad Spengler/PaX Team's code in the last public patch of grsecurity/PaX based on our understanding of the code. Changes or omissions from the original code are ours and don't reflect the original grsecurity/PaX code. Performance impact: Hardware: Intel Core i7-4770, 16 GB RAM Test #1: building the Linux kernel on a single core 0.91% slowdown Test #2: hackbench -s 4096 -l 2000 -g 15 -f 25 -P 4.2% slowdown So the STACKLEAK description in Kconfig includes: "The tradeoff is the performance impact: on a single CPU system kernel compilation sees a 1% slowdown, other systems and workloads may vary and you are advised to test this feature on your expected workload before deploying it". Signed-off-by: Alexander Popov <alex.popov@linux.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org>
* | | | checkpatch: remove GCC_BINARY_CONSTANT warningChristophe Leroy2018-10-311-11/+0
| |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This warning was there to avoid the use of 0bxxx values as they are not supported by gcc prior to v4.3 Since cafa0010cd51f ("Raise the minimum required gcc version to 4.6"), it's not an issue anymore and using such values can increase readability of code. Joe said: : Seems sensible as the other compilers also support binary literals from : relatively old versions. : http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3472.pdf : https://software.intel.com/en-us/articles/c14-features-supported-by-intel-c-compiler Link: http://lkml.kernel.org/r/392eeae782302ee8812a3c932a602035deed1609.1535351453.git.christophe.leroy@c-s.fr Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge tag 'vla-v4.20-rc1' of ↵Linus Torvalds2018-10-281-1/+0
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull VLA removal from Kees Cook: "Globally warn on VLA use. This turns on "-Wvla" globally now that the last few trees with their VLA removals have landed (crypto, block, net, and powerpc). Arnd mentioned that there may be a couple more VLAs hiding in hard-to-find randconfigs, but nothing big has shaken out in the last month or so in linux-next. We should be basically VLA-free now! Wheee. :) Summary: - Remove unused fallback for BUILD_BUG_ON (which technically contains a VLA) - Lift -Wvla to the top-level Makefile" * tag 'vla-v4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: Makefile: Globally enable VLA warning compiler.h: give up __compiletime_assert_fallback()
| * | | Makefile: Globally enable VLA warningKees Cook2018-10-111-1/+0
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that Variable Length Arrays (VLAs) have been entirely removed[1] from the kernel, enable the VLA warning globally. The only exceptions to this are the KASan an UBSan tests which are explicitly checking that VLAs trigger their respective tests. [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Airlie <airlied@linux.ie> Cc: linux-kbuild@vger.kernel.org Cc: intel-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org Signed-off-by: Kees Cook <keescook@chromium.org>
* | | Merge tag 'kbuild-v4.20' of ↵Linus Torvalds2018-10-286-68/+34
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - optimize kallsyms slightly - remove check for old CFLAGS usage - add some compiler flags unconditionally instead of evaluating $(call cc-option,...) - fix variable shadowing in host tools - refactor scripts/mkmakefile - refactor various makefiles * tag 'kbuild-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: modpost: Create macro to avoid variable shadowing ASN.1: Remove unnecessary shadowed local variable kbuild: use 'else ifeq' for checksrc to improve readability kbuild: remove unneeded link_multi_deps kbuild: add -Wno-unused-but-set-variable flag unconditionally kbuild: add -Wdeclaration-after-statement flag unconditionally kbuild: add -Wno-pointer-sign flag unconditionally modpost: remove leftover symbol prefix handling for module device table kbuild: simplify command line creation in scripts/mkmakefile kbuild: do not pass $(objtree) to scripts/mkmakefile kbuild: remove user ID check in scripts/mkmakefile kbuild: remove VERSION and PATCHLEVEL from $(objtree)/Makefile kbuild: add --include-dir flag only for out-of-tree build kbuild: remove dead code in cmd_files calculation in top Makefile kbuild: hide most of targets when running config or mixed targets kbuild: remove old check for CFLAGS use kbuild: prefix Makefile.dtbinst path with $(srctree) unconditionally kallsyms: remove left-over Blackfin code kallsyms: reduce size a little on 64-bit
| * | | modpost: Create macro to avoid variable shadowingLeonardo Bras2018-10-281-4/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Create DEF_FIELD_ADDR_VAR as a more generic version of the DEF_FIELD_ADD macro, allowing usage of a variable name other than the struct element name. Also, sets DEF_FIELD_ADDR as a specific usage of DEF_FILD_ADDR_VAR in which the var name is the same as the struct element name. Then, makes use of DEF_FIELD_ADDR_VAR to create a variable of another name, in order to avoid variable shadowing. Signed-off-by: Leonardo Bras <leobras.c@gmail.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | | ASN.1: Remove unnecessary shadowed local variableLeonardo Bras2018-10-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove an unnecessary shadowed local variable (start). It was used only once, with the same value it was started before the if block. Signed-off-by: Leonardo Bras <leobras.c@gmail.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | | kbuild: use 'else ifeq' for checksrc to improve readabilityMasahiro Yamada2018-10-191-8/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'ifeq ... else ifeq ... endif' notation is supported by GNU Make 3.81 or later, which is the requirement for building the kernel since commit 37d69ee30808 ("docs: bump minimal GNU Make version to 3.81"). Use it to improve the readability. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | | kbuild: remove unneeded link_multi_depsMasahiro Yamada2018-10-191-18/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit c8589d1e9e01 ("kbuild: handle multi-objs dependency appropriately"), $^ really represents all the prerequisite of the composite object being built. Hence, $(filter %.o,$^) contains all the objects to link together, which is much simpler than link_multi_deps calculation. Please note $(filter-out FORCE,$^) does not work here. When a single object module is turned into a multi object module, $^ will contain header files that were previously included for building the single object, and recorded in the .*.cmd file. To filter out such headers, $(filter %.o,$^) should be used here. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | | modpost: remove leftover symbol prefix handling for module device tableMasahiro Yamada2018-10-191-4/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Blackfin and metag were the only architectures that prefix symbols with an underscore. They were removed by commit 4ba66a976072 ("arch: remove blackfin port"), commit bb6fb6dfcc17 ("metag: Remove arch/metag/"), respectively. It is no longer necessary to handle <prefix> part of module device table symbols. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | | kbuild: simplify command line creation in scripts/mkmakefileMasahiro Yamada2018-10-041-7/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Assuming we never invoke the generated Makefile from outside of the $(objtree) directory, $(CURDIR) points to the absolute path of $(objtree). BTW, 'lastword' is natively supported by GNU Make 3.81+, which is the current requirement for building the kernel. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | | kbuild: do not pass $(objtree) to scripts/mkmakefileMasahiro Yamada2018-10-041-4/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Since $(objtree) is always '.', it is not useful to pass it to scripts/mkmakefile. I assume nobody wants to run this script directly. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | | kbuild: remove user ID check in scripts/mkmakefileMasahiro Yamada2018-10-041-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This line was added by commit fd5f0cd6b0ce ("kbuild: Do not overwrite makefile as anohter user"). Its commit description says the intention was to prevent $(objtree)/Makefile from being owned by root when e.g. running 'make install'. However, as commit 19514fc665ff ("arm, kbuild: make "make install" not depend on vmlinux") stated, installation targets must not modify the source tree in the first place. If they do, we are already screwed up. We must fix the root cause. Installation targets should just copy files verbatim, hence we never expect $(objtree)/Makefile is touched by root. The user ID check in scripts/mkmakefile is unneeded. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | | kbuild: remove VERSION and PATCHLEVEL from $(objtree)/MakefileMasahiro Yamada2018-10-041-6/+0
| | | | | | | | | | | | | | | | | | | | | | | | Neither VERSION nor PATCHLEVEL is used in any useful way. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | | kbuild: remove old check for CFLAGS useMasahiro Yamada2018-09-121-10/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This check has been here for more than a decade since commit 0c53c8e6eb45 ("kbuild: check for wrong use of CFLAGS"). Enough time for migration has passed. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | | kbuild: prefix Makefile.dtbinst path with $(srctree) unconditionallyMasahiro Yamada2018-09-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | $(srctree) always points to the top of the source tree whether KBUILD_SRC is set or not. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | | kallsyms: remove left-over Blackfin codeMasahiro Yamada2018-09-101-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These symbols were added by commit 028f042613c3 ("kallsyms: support kernel symbols in Blackfin on-chip memory") for Blackfin. The Blackfin support was removed by commit 4ba66a976072 ("arch: remove blackfin port"). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | | kallsyms: reduce size a little on 64-bitJan Beulich2018-09-101-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Both kallsyms_num_syms and kallsyms_markers[] don't really need to use unsigned long as their (base) types; unsigned int fully suffices. Signed-off-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* | | | Merge branch 'akpm' (patches from Andrew)Linus Torvalds2018-10-271-1/+1
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge updates from Andrew Morton: - a few misc things - ocfs2 updates - most of MM * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (132 commits) hugetlbfs: dirty pages as they are added to pagecache mm: export add_swap_extent() mm: split SWP_FILE into SWP_ACTIVATED and SWP_FS tools/testing/selftests/vm/map_fixed_noreplace.c: add test for MAP_FIXED_NOREPLACE mm: thp: relocate flush_cache_range() in migrate_misplaced_transhuge_page() mm: thp: fix mmu_notifier in migrate_misplaced_transhuge_page() mm: thp: fix MADV_DONTNEED vs migrate_misplaced_transhuge_page race condition mm/kasan/quarantine.c: make quarantine_lock a raw_spinlock_t mm/gup: cache dev_pagemap while pinning pages Revert "x86/e820: put !E820_TYPE_RAM regions into memblock.reserved" mm: return zero_resv_unavail optimization mm: zero remaining unavailable struct pages tools/testing/selftests/vm/gup_benchmark.c: add MAP_HUGETLB option tools/testing/selftests/vm/gup_benchmark.c: add MAP_SHARED option tools/testing/selftests/vm/gup_benchmark.c: allow user specified file tools/testing/selftests/vm/gup_benchmark.c: fix 'write' flag usage mm/gup_benchmark.c: add additional pinning methods mm/gup_benchmark.c: time put_page() mm: don't raise MEMCG_OOM event due to failed high-order allocation mm/page-writeback.c: fix range_cyclic writeback vs writepages deadlock ...
| * | | | scripts/tags.sh: add DECLARE_HASHTABLE()Kirill Tkhai2018-10-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In addition to DEFINE_HASHTABLE() add DECLARE_ variant. Link: http://lkml.kernel.org/r/153683203215.13678.11468076350083405643.stgit@localhost.localdomain Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Constantine Shulyupin <const@MakeLinux.com> Cc: Arend van Spriel <arend.vanspriel@broadcom.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Joey Pabalinas <joeypabalinas@gmail.com> Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | Merge tag 'devicetree-for-4.20' of ↵Linus Torvalds2018-10-2626-241/+1037
|\ \ \ \ \ | |/ / / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull Devicetree updates from Rob Herring: "A bit bigger than normal as I've been busy this cycle. There's a few things with dependencies and a few things subsystem maintainers didn't pick up, so I'm taking them thru my tree. The fixes from Johan didn't get into linux-next, but they've been waiting for some time now and they are what's left of what subsystem maintainers didn't pick up. Summary: - Sync dtc with upstream version v1.4.7-14-gc86da84d30e4 - Work to get rid of direct accesses to struct device_node name and type pointers in preparation for removing them. New helpers for parsing DT cpu nodes and conversions to use the helpers. printk conversions to %pOFn for printing DT node names. Most went thru subystem trees, so this is the remainder. - Fixes to DT child node lookups to actually be restricted to child nodes instead of treewide. - Refactoring of dtb targets out of arch code. This makes the support more uniform and enables building all dtbs on c6x, microblaze, and powerpc. - Various DT binding updates for Renesas r8a7744 SoC - Vendor prefixes for Facebook, OLPC - Restructuring of some ARM binding docs moving some peripheral bindings out of board/SoC binding files - New "secure-chosen" binding for secure world settings on ARM - Dual licensing of 2 DT IRQ binding headers" * tag 'devicetree-for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (78 commits) ARM: dt: relicense two DT binding IRQ headers power: supply: twl4030-charger: fix OF sibling-node lookup NFC: nfcmrvl_uart: fix OF child-node lookup net: stmmac: dwmac-sun8i: fix OF child-node lookup net: bcmgenet: fix OF child-node lookup drm/msm: fix OF child-node lookup drm/mediatek: fix OF sibling-node lookup of: Add missing exports of node name compare functions dt-bindings: Add OLPC vendor prefix dt-bindings: misc: bk4: Add device tree binding for Liebherr's BK4 SPI bus dt-bindings: thermal: samsung: Add SPDX license identifier dt-bindings: clock: samsung: Add SPDX license identifiers dt-bindings: timer: ostm: Add R7S9210 support dt-bindings: phy: rcar-gen2: Add r8a7744 support dt-bindings: can: rcar_can: Add r8a7744 support dt-bindings: timer: renesas, cmt: Document r8a7744 CMT support dt-bindings: watchdog: renesas-wdt: Document r8a7744 support dt-bindings: thermal: rcar: Add device tree support for r8a7744 Documentation: dt: Add binding for /secure-chosen/stdout-path dt-bindings: arm: zte: Move sysctrl bindings to their own doc ...
| * | | | Merge branch 'all-dtbs' into dt/nextRob Herring2018-10-043-4/+3
| |\ \ \ \
| | * | | | kbuild: consolidate Devicetree dtb build rulesRob Herring2018-10-023-4/+3
| | | |/ / | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is nothing arch specific about building dtb files other than their location under /arch/*/boot/dts/. Keeping each arch aligned is a pain. The dependencies and supported targets are all slightly different. Also, a cross-compiler for each arch is needed, but really the host compiler preprocessor is perfectly fine for building dtbs. Move the build rules to a common location and remove the arch specific ones. This is done in a single step to avoid warnings about overriding rules. The build dependencies had been a mixture of 'scripts' and/or 'prepare'. These pull in several dependencies some of which need a target compiler (specifically devicetable-offsets.h) and aren't needed to build dtbs. All that is really needed is dtc, so adjust the dependencies to only be dtc. This change enables support 'dtbs_install' on some arches which were missing the target. Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: Paul Burton <paul.burton@mips.com> Acked-by: Ley Foon Tan <ley.foon.tan@intel.com> Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: James Hogan <jhogan@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: linux-kbuild@vger.kernel.org Cc: linux-snps-arc@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org Cc: uclinux-h8-devel@lists.sourceforge.jp Cc: linux-mips@linux-mips.org Cc: nios2-dev@lists.rocketboards.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-xtensa@linux-xtensa.org Signed-off-by: Rob Herring <robh@kernel.org>
| * | | | scripts/dtc: Update to upstream version v1.4.7-14-gc86da84d30e4Rob Herring2018-09-2023-236/+1033
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Major changes are I2C and SPI bus checks, YAML output format (for future validation), some new libfdt functions, and more libfdt validation of dtbs. The YAML addition adds an optional dependency on libyaml. pkg-config is used to test for it and pkg-config became a kconfig dependency in 4.18. This adds the following commits from upstream: c86da84d30e4 Add support for YAML encoded output 361b5e7d8067 Make type_marker_length helper public bfbfab047e45 pylibfdt: Add a means to add and delete notes 9005f4108e7c pylibfdt: Allow delprop() to return errors b94c056b137e Make valgrind optional fd06c54d4711 tests: Better testing of dtc -I fs mode c3f50c9a86d9 tests: Allow dtbs_equal_unordered to ignore mem reserves 0ac9fdee37c7 dtc: trivial '-I fs -O dts' test 0fd1c8c783f3 pylibfdt: fdt_get_mem_rsv returns 2 uint64_t values 04853cad18f4 pylibfdt: Don't incorrectly / unnecessarily override uint64_t typemap 9619c8619c37 Kill bogus TYPE_BLOB marker type ac68ff92ae20 parser: add TYPE_STRING marker to path references 90a190eb04d9 checks: add SPI bus checks 53a1bd546905 checks: add I2C bus checks 88f18909db73 dtc: Bump version to v1.4.7 85bce8b2f06d tests: Correction to vg_prepare_blob() 57f7f9e7bc7c tests: Don't call memcmp() with NULL arguments c12b2b0c20eb libfdt: fdt_address_cells() and fdt_size_cells() 3fe0eeda0b7f livetree: Set phandle properties type to uint32 853649acceba pylibfdt: Support the sequential-write interface 9b0e4fe26093 tests: Improve fdt_resize() tests 1087504bb3e8 libfdt: Add necessary header padding in fdt_create() c72fa777e613 libfdt: Copy the struct region in fdt_resize() 32b9c6130762 Preserve datatype markers when emitting dts format 6dcb8ba408ec libfdt: Add helpers for accessing unaligned words 42607f21d43e tests: Fix incorrect check name 'prop_name_chars' 9d78c33bf8a1 tests: fix grep for checks error messages b770f3d1c13f pylibfdt: Support setting the name of a node 2f0d07e678e0 pylibfdt: Add functions to set and get properties as strings 354d3dc55939 pylibfdt: Update the bytearray size with pack() 3c374d46acce pylibfdt: Allow reading integer values from properties 49d32ce40bb4 pylibfdt: Use an unsigned type for fdt32_t 481246a0c13a pylibfdt: Avoid accessing the internal _fdt member in tests 9aafa33d99ed pylibfdt: Add functions to update properties 5a598671fdbf pylibfdt: Support device-tree creation/expansion 483e170625e1 pylibfdt: Add support for reading the memory reserve map 29bb05aa4200 pylibfdt: Add support for the rest of the header functions 582a7159a5d0 pylibfdt: Add support for fdt_next_node() f0f8c9169819 pylibfdt: Reorder functions to match libfdt.h 64a69d123935 pylibfdt: Return string instead of bytearray from getprop() 4d09a83420df fdtput: Add documentation e617cbe1bd67 fdtget: Add documentation 180a93924014 Use <inttypes.h> format specifiers in a bunch of places we should b9af3b396576 scripts/dtc: Fixed format mismatch in fprintf 4b8fcc3d015c libfdt: Add fdt_check_full() function c14223fb2292 tests: Use valgrind client requests for better checking 5b67d2b955a3 tests: Better handling of valgrind errors saving blobs e2556aaeb506 tests: Remove unused #define fb9c6abddaa8 Use size_t for blob lengths in utilfdt_read* 0112fda03bf6 libfdt: Add fdt_header_size() 6473a21d8bfe Consolidate utilfdt_read_len() variants d5db5382c5e5 libfdt: Safer access to memory reservations 719d582e98ec libfdt: Propagate name errors in fdt_getprop_by_offset() 70166d62a27f libfdt: Safer access to strings section eb890c0f77dc libfdt: Make fdt_check_header() more thorough 899d6fad93f3 libfdt: Improve sequential write state checking 04b5b4062ccd libfdt: Clean up header checking functions 44d3efedc816 Preserve datatype information when parsing dts f0be81bd8de0 Make Property a subclass of bytearray 24b1f3f064d4 pylibfdt: Add a method to access the device tree directly Signed-off-by: Rob Herring <robh@kernel.org>
| * | | | scripts/dtc: Add yamltree.c to dtc sourcesRob Herring2018-09-201-1/+1
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | dtc has a new source file, yamltree.c, that needs to be copied when syncing dtc sources. Signed-off-by: Rob Herring <robh@kernel.org>
* | | | Merge tag 'docs-4.20' of git://git.lwn.net/linuxLinus Torvalds2018-10-242-71/+4
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull documentation updates from Jonathan Corbet: "This is a fairly typical cycle for documentation. There's some welcome readability improvements for the formatted output, some LICENSES updates including the addition of the ISC license, the removal of the unloved and unmaintained 00-INDEX files, the deprecated APIs document from Kees, more MM docs from Mike Rapoport, and the usual pile of typo fixes and corrections" * tag 'docs-4.20' of git://git.lwn.net/linux: (41 commits) docs: Fix typos in histogram.rst docs: Introduce deprecated APIs list kernel-doc: fix declaration type determination doc: fix a typo in adding-syscalls.rst docs/admin-guide: memory-hotplug: remove table of contents doc: printk-formats: Remove bogus kobject references for device nodes Documentation: preempt-locking: Use better example dm flakey: Document "error_writes" feature docs/completion.txt: Fix a couple of punctuation nits LICENSES: Add ISC license text LICENSES: Add note to CDDL-1.0 license that it should not be used docs/core-api: memory-hotplug: add some details about locking internals docs/core-api: rename memory-hotplug-notifier to memory-hotplug docs: improve readability for people with poorer eyesight yama: clarify ptrace_scope=2 in Yama documentation docs/vm: split memory hotplug notifier description to Documentation/core-api docs: move memory hotplug description into admin-guide/mm doc: Fix acronym "FEKEK" in ecryptfs docs: fix some broken documentation references iommu: Fix passthrough option documentation ...
| * | | | kernel-doc: fix declaration type determinationRandy Dunlap2018-10-181-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make declaration type determination more robust. When scripts/kernel-doc is deciding if some kernel-doc notation contains an enum, a struct, a union, a typedef, or a function, it does a pattern match on the beginning of the string, looking for a match with one of "struct", "union", "enum", or "typedef", and otherwise defaults to a function declaration type. However, if a function or a function-like macro has a name that begins with "struct" (e.g., struct_size()), then kernel-doc incorrectly decides that this is a struct declaration. Fix this by looking for the declaration type keywords having an ending word boundary (\b), so that "struct_size" will not match a struct declaration. I compared lots of html before/after output from core-api, driver-api, and networking. There were no differences in any of the files that I checked. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Jani Nikula <jani.nikula@intel.com> Tested-by: Kees Cook <keescook@chromium.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| * | | | Drop all 00-INDEX files from Documentation/Henrik Austad2018-09-091-67/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a respin with a wider audience (all that get_maintainer returned) and I know this spams a *lot* of people. Not sure what would be the correct way, so my apologies for ruining your inbox. The 00-INDEX files are supposed to give a summary of all files present in a directory, but these files are horribly out of date and their usefulness is brought into question. Often a simple "ls" would reveal the same information as the filenames are generally quite descriptive as a short introduction to what the file covers (it should not surprise anyone what Documentation/sched/sched-design-CFS.txt covers) A few years back it was mentioned that these files were no longer really needed, and they have since then grown further out of date, so perhaps it is time to just throw them out. A short status yields the following _outdated_ 00-INDEX files, first counter is files listed in 00-INDEX but missing in the directory, last is files present but not listed in 00-INDEX. List of outdated 00-INDEX: Documentation: (4/10) Documentation/sysctl: (0/1) Documentation/timers: (1/0) Documentation/blockdev: (3/1) Documentation/w1/slaves: (0/1) Documentation/locking: (0/1) Documentation/devicetree: (0/5) Documentation/power: (1/1) Documentation/powerpc: (0/5) Documentation/arm: (1/0) Documentation/x86: (0/9) Documentation/x86/x86_64: (1/1) Documentation/scsi: (4/4) Documentation/filesystems: (2/9) Documentation/filesystems/nfs: (0/2) Documentation/cgroup-v1: (0/2) Documentation/kbuild: (0/4) Documentation/spi: (1/0) Documentation/virtual/kvm: (1/0) Documentation/scheduler: (0/2) Documentation/fb: (0/1) Documentation/block: (0/1) Documentation/networking: (6/37) Documentation/vm: (1/3) Then there are 364 subdirectories in Documentation/ with several files that are missing 00-INDEX alltogether (and another 120 with a single file and no 00-INDEX). I don't really have an opinion to whether or not we /should/ have 00-INDEX, but the above 00-INDEX should either be removed or be kept up to date. If we should keep the files, I can try to keep them updated, but I rather not if we just want to delete them anyway. As a starting point, remove all index-files and references to 00-INDEX and see where the discussion is going. Signed-off-by: Henrik Austad <henrik@austad.us> Acked-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Just-do-it-by: Steven Rostedt <rostedt@goodmis.org> Reviewed-by: Jens Axboe <axboe@kernel.dk> Acked-by: Paul Moore <paul@paul-moore.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Mark Brown <broonie@kernel.org> Acked-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: [Almost everybody else] Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | | | | Merge branch 'parisc-4.20-1' of ↵Linus Torvalds2018-10-231-3/+3
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc updates from Helge Deller: "Lots of small fixes and enhancements, most noteably: - Many TLB and cache flush optimizations (Dave) - Fixed HPMC/crash handler on 64-bit kernel (Dave and myself) - Added alternative infrastructre. The kernel now live-patches itself for various situations, e.g. replace SMP code when running on one CPU only or drop cache flushes when system has no cache installed. - vmlinuz now contains a full copy of the compressed vmlinux file. This simplifies debugging the currently booted kernel. - Unused driver removal (Christoph) - Reduced warnings of Dino PCI bridge when running in qemu - Removed gcc version check (Masahiro)" * 'parisc-4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: (23 commits) parisc: Retrieve and display the PDC PAT capabilities parisc: Optimze cache flush algorithms parisc: Remove pte_inserted define parisc: Add PDC PAT cell_info() and pd_get_pdc_revisions() functions parisc: Drop two instructions from pte lookup code parisc: Use zdep for shlw macro on PA1.1 and PA2.0 parisc: Add alternative coding infrastructure parisc: Include compressed vmlinux file in vmlinuz boot kernel extract-vmlinux: Check for uncompressed image as fallback parisc: Fix address in HPMC IVA parisc: Fix exported address of os_hpmc handler parisc: Fix map_pages() to not overwrite existing pte entries parisc: Purge TLB entries after updating page table entry and set page accessed flag in TLB handler parisc: Release spinlocks using ordered store parisc: Ratelimit dino stuck interrupt warnings parisc: dino: Utilize DINO_MASK_IRQ() macro parisc: Clean up crash header output parisc: Add SYSTEM_INFO and REGISTER TOC PAT functions parisc: Remove PTE load and fault check from L2_ptep macro parisc: Reorder TLB flush timing calculation ...
| * | | | | extract-vmlinux: Check for uncompressed image as fallbackHelge Deller2018-10-171-3/+3
| | |_|_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As on x86-64 and other architectures, the boot kernel on parisc (vmlinuz and bzImage) contains a full compressed copy of the final kernel executable (vmlinux.bin.gz), which one should be able to extract with the extract-vmlinux script. But on parisc extracting the kernel with extract-vmlinux fails. Currently the script first checks if the given file is an ELF file (which is true on parisc) and if so returns it. Thus on parisc we unexpectedly get back the vmlinuz boot file instead of the uncompressed vmlinux image. This patch fixes this issue by reverting the logic. It now first tries to find a compression signature in the given file and if that fails it checks the file itself as fallback. Signed-off-by: Helge Deller <deller@gmx.de>
* | | | | Merge branch 'locking-core-for-linus' of ↵Linus Torvalds2018-10-232-1/+5
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking and misc x86 updates from Ingo Molnar: "Lots of changes in this cycle - in part because locking/core attracted a number of related x86 low level work which was easier to handle in a single tree: - Linux Kernel Memory Consistency Model updates (Alan Stern, Paul E. McKenney, Andrea Parri) - lockdep scalability improvements and micro-optimizations (Waiman Long) - rwsem improvements (Waiman Long) - spinlock micro-optimization (Matthew Wilcox) - qspinlocks: Provide a liveness guarantee (more fairness) on x86. (Peter Zijlstra) - Add support for relative references in jump tables on arm64, x86 and s390 to optimize jump labels (Ard Biesheuvel, Heiko Carstens) - Be a lot less permissive on weird (kernel address) uaccess faults on x86: BUG() when uaccess helpers fault on kernel addresses (Jann Horn) - macrofy x86 asm statements to un-confuse the GCC inliner. (Nadav Amit) - ... and a handful of other smaller changes as well" * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (57 commits) locking/lockdep: Make global debug_locks* variables read-mostly locking/lockdep: Fix debug_locks off performance problem locking/pvqspinlock: Extend node size when pvqspinlock is configured locking/qspinlock_stat: Count instances of nested lock slowpaths locking/qspinlock, x86: Provide liveness guarantee x86/asm: 'Simplify' GEN_*_RMWcc() macros locking/qspinlock: Rework some comments locking/qspinlock: Re-order code locking/lockdep: Remove duplicated 'lock_class_ops' percpu array x86/defconfig: Enable CONFIG_USB_XHCI_HCD=y futex: Replace spin_is_locked() with lockdep locking/lockdep: Make class->ops a percpu counter and move it under CONFIG_DEBUG_LOCKDEP=y x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs x86/cpufeature: Macrofy inline assembly code to work around GCC inlining bugs x86/extable: Macrofy inline assembly code to work around GCC inlining bugs x86/paravirt: Work around GCC inlining bugs when compiling paravirt ops x86/bug: Macrofy the BUG table section handling, to work around GCC inlining bugs x86/alternatives: Macrofy lock prefixes to work around GCC inlining bugs x86/refcount: Work around GCC inlining bug x86/objtool: Use asm macros to work around GCC inlining bugs ...
| * | | | | kbuild/Makefile: Prepare for using macros in inline assembly code to work ↵Nadav Amit2018-10-042-1/+5
| |/ / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | around asm() related GCC inlining bugs Using macros in inline assembly allows us to work around bugs in GCC's inlining decisions. Compile macros.S and use it to assemble all C files. Currently only x86 will use it. Background: The inlining pass of GCC doesn't include an assembler, so it's not aware of basic properties of the generated code, such as its size in bytes, or that there are such things as discontiuous blocks of code and data due to the newfangled linker feature called 'sections' ... Instead GCC uses a lazy and fragile heuristic: it does a linear count of certain syntactic and whitespace elements in inlined assembly block source code, such as a count of new-lines and semicolons (!), as a poor substitute for "code size and complexity". Unsurprisingly this heuristic falls over and breaks its neck whith certain common types of kernel code that use inline assembly, such as the frequent practice of putting useful information into alternative sections. As a result of this fresh, 20+ years old GCC bug, GCC's inlining decisions are effectively disabled for inlined functions that make use of such asm() blocks, because GCC thinks those sections of code are "large" - when in reality they are often result in just a very low number of machine instructions. This absolute lack of inlining provess when GCC comes across such asm() blocks both increases generated kernel code size and causes performance overhead, which is particularly noticeable on paravirt kernels, which make frequent use of these inlining facilities in attempt to stay out of the way when running on baremetal hardware. Instead of fixing the compiler we use a workaround: we set an assembly macro and call it from the inlined assembly block. As a result GCC considers the inline assembly block as a single instruction. (Which it often isn't but I digress.) This uglifies and bloats the source code - for example just the refcount related changes have this impact: Makefile | 9 +++++++-- arch/x86/Makefile | 7 +++++++ arch/x86/kernel/macros.S | 7 +++++++ scripts/Kbuild.include | 4 +++- scripts/mod/Makefile | 2 ++ 5 files changed, 26 insertions(+), 3 deletions(-) Yay readability and maintainability, it's not like assembly code is hard to read and maintain ... We also hope that GCC will eventually get fixed, but we are not holding our breath for that. Yet we are optimistic, it might still happen, any decade now. [ mingo: Wrote new changelog describing the background. ] Tested-by: Kees Cook <keescook@chromium.org> Signed-off-by: Nadav Amit <namit@vmware.com> Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kbuild@vger.kernel.org Link: http://lkml.kernel.org/r/20181003213100.189959-3-namit@vmware.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | | | | Merge tag 'kbuild-fixes-v4.19-2' of ↵Greg Kroah-Hartman2018-10-111-1/+1
|\ \ \ \ \ | |/ / / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Masahiro writes: "Kbuild fixes for v4.19 (2nd) - Fix warnings from recordmcount.pl when building with Clang - Allow Clang to use GNU toolchains correctly - Disable CONFIG_SAMPLES for UML to avoid build error" * tag 'kbuild-fixes-v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: samples: disable CONFIG_SAMPLES for UML kbuild: allow to use GCC toolchain not in Clang search path ftrace: Build with CPPFLAGS to get -Qunused-arguments
| * | | | ftrace: Build with CPPFLAGS to get -Qunused-argumentsJoel Stanley2018-09-191-1/+1
| | |_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When building to record the mcount locations the kernel uses KBUILD_CFLAGS but not KBUILD_CPPFLAGS. This means it lacks -Qunused-arguments when building with clang, resulting in a lot of noisy warnings. Signed-off-by: Joel Stanley <joel@jms.id.au> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* | | | Merge tag 'linux-kselftest-4.19-rc5' of ↵Greg Kroah-Hartman2018-09-171-0/+13
|\ \ \ \ | |/ / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pulled kselftest fixes from Shuah: "This Kselftest fixes update for 4.9-rc5 consists of: -- fixes to build failures -- fixes to add missing config files to increase test coverage -- fixes to cgroup test and a new cgroup test for memory.oom.group"
| * | | selftests: add headers_install to lib.mkAnders Roxell2018-09-051-0/+13
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the kernel headers aren't installed we can't build all the tests. Add a new make target rule 'khdr' in the file lib.mk to generate the kernel headers and that gets include for every test-dir Makefile that includes lib.mk If the testdir in turn have its own sub-dirs the top_srcdir needs to be set to the linux-rootdir to be able to generate the kernel headers. Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Reviewed-by: Fathi Boudra <fathi.boudra@linaro.org> Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
* | | Merge tag 'kbuild-fixes-v4.19' of ↵Linus Torvalds2018-09-099-35/+46
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild fixes from Masahiro Yamada: - make setlocalversion more robust about -dirty check - loosen the pkg-config requirement for Kconfig - change missing depmod to a warning from an error - warn modules_install when System.map is missing * tag 'kbuild-fixes-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kbuild: modules_install: warn when missing System.map file kbuild: make missing $DEPMOD a Warning instead of an Error kconfig: do not require pkg-config on make {menu,n}config kconfig: remove a spurious self-assignment scripts/setlocalversion: git: Make -dirty check more robust
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 01:38:54 +0100