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* kbuild: remove cc-version macroMasahiro Yamada2019-03-041-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is no more direct user of this macro; it is only used by cc-ifversion. Calling this macro is not efficient since it invokes the compiler to get the compiler version. CONFIG_GCC_VERSION is already calculated in the Kconfig stage, so Makefile can reuse it. Here is a note about the slight difference between cc-version and CONFIG_GCC_VERSION: When using Clang, cc-version is evaluated to '0402' because Clang defines __GNUC__ and __GNUC__MINOR__, and looks like GCC 4.2 in the version point of view. On the other hand, CONFIG_GCC_VERSION=0 when $(CC) is clang. There are currently two users of cc-ifversion: arch/mips/loongson64/Platform arch/powerpc/Makefile They are not affected by this change. The format of cc-version is <major><minor>, while CONFIG_GCC_VERSION <major><minor><patch>. I adjusted cc-ifversion for the difference of the number of digits. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: update comment block of scripts/clang-version.shMasahiro Yamada2019-03-041-7/+3
| | | | | | | | | | | | Commit 469cb7376c06 ("kconfig: add CC_IS_CLANG and CLANG_VERSION") changed the code, but missed to update the comment block. The -p option was gone, and the output is 5-digit (or 6-digit when Clang 10 is released). Update the comment now. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: [bin]deb-pkg: add DPKG_FLAGS variableKacper Kołodziej2019-02-281-2/+2
| | | | | | | | DPKG_FLAGS variable lets user to add more flags to dpkg-buildpackage command in deb-pkg and bindeb-pkg. Signed-off-by: Kacper Kołodziej <kacper@kolodziej.it> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: move ".config not found!" message from Kconfig to MakefileMasahiro Yamada2019-02-271-13/+0
| | | | | | | | | | If you run "make" in a pristine source tree, currently Kbuild will start to build Kconfig to let it show the error message. It would be more straightforward to check it in Makefile and let it fail immediately. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: refactor cc-cross-prefix implementationMasahiro Yamada2019-02-271-8/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - $(word 1, <text>) is equivalent to $(firstword <text>) - hardcode "gcc" instead of $(CC) - minimize the shell script part A little more notes in case $(filter-out -%, ...) is not clear. arch/mips/Makefile passes prefixes depending on the configuration. CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- \ $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-) In the Kconfig stage (e.g. when you run 'make defconfig'), neither CONFIG_32BIT nor CONFIG_64BIT is defined. So, $(tool-archpref) is empty. As a result, "-linux -linux-gnu- -unknown-linux-gnu" is passed into cc-cross-prefix. The command 'which' assumes arguments starting with a hyphen as command options, then emits the following messages: Illegal option -l Illegal option -l Illegal option -u I think it is strange to define CROSS_COMPILE depending on the CONFIG options since you need to feed $(CC) to Kconfig, but it is how MIPS Makefile currently works. Anyway, it would not hurt to filter-out invalid strings beforehand. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: hardcode genksyms path and remove GENKSYMS variableMasahiro Yamada2019-02-271-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The genksyms source was integrated into the kernel tree in 2003. I do not expect anybody still using the external /sbin/genksyms. Kbuild does not need to provide the ability to override GENKSYMS. Let's remove the GENKSYMS variable, and use the hardcoded path. Since it occurred in the pre-git era, I attached the commit message in case somebody is interested in the historical background. | Author: Kai Germaschewski <kai@tp1.ruhr-uni-bochum.de> | Date: Wed Feb 19 04:17:28 2003 -0600 | | kbuild: [PATCH] put genksyms in scripts dir | | This puts genksyms into scripts/genksyms/. | | genksyms used to be maintained externally, though the only possible user | was the kernel build. Moving it into the kernel sources makes it easier to | keep it uptodate, like for example updating it to generate linker scripts | directly instead of postprocessing the generated header file fragments | with sed, as we do currently. | | Also, genksyms does not handle __typeof__, which needs to be fixed since | some of the exported symbol in the kernel are defined using __typeof__. | | (Rusty Russell/me) Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* scripts/gdb: refactor rules for symlink creationMasahiro Yamada2019-02-271-7/+11
| | | | | | | | | | gdb-scripts is not a real object, but (ab)used like a phony target. Rewrite the code in a more Kbuild-ish way. Add symlinks to extra-y and use if_changed. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
* scripts/gdb: do not descend into scripts/gdb from scriptsMasahiro Yamada2019-02-272-8/+4
| | | | | | | | | | Currently, Kbuild descends from scripts/Makefile to scripts/gdb/Makefile just for creating symbolic links, but it does not need to do it so early. Merge the two descending paths to simplify the code. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
* kbuild: generate modules.order only when CONFIG_MODULES=yMasahiro Yamada2019-02-201-0/+2
| | | | | | | Do not generate pointless modules.order when the module support is disabled. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: pkg: use -f $(srctree)/Makefile to recurse to top MakefileMasahiro Yamada2019-02-204-10/+12
| | | | | | | | | '$(MAKE) KBUILD_SRC=' changes the working directory back and forth between objtree and srctree. It is better to recurse to the top-level Makefile directly. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: Disable extra debugging info in .s outputMasahiro Yamada2019-02-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Modern gcc adds view assignments, reset assertion checking in .loc directives and a couple more additional debug markers, which clutters the asm output unnecessarily: For example: bsp_resume: .LFB3466: .loc 1 1868 1 is_stmt 1 view -0 .cfi_startproc .loc 1 1869 2 view .LVU73 # arch/x86/kernel/cpu/common.c:1869: if (this_cpu->c_bsp_resume) .loc 1 1869 14 is_stmt 0 view .LVU74 movq this_cpu(%rip), %rax # this_cpu, this_cpu movq 64(%rax), %rax # this_cpu.94_1->c_bsp_resume, _2 # arch/x86/kernel/cpu/common.c:1869: if (this_cpu->c_bsp_resume) .loc 1 1869 5 view .LVU75 testq %rax, %rax # _2 je .L8 #, .loc 1 1870 3 is_stmt 1 view .LVU76 movq $boot_cpu_data, %rdi #, jmp __x86_indirect_thunk_rax or .loc 2 57 9 view .LVU478 .loc 2 57 9 view .LVU479 .loc 2 57 9 view .LVU480 .loc 2 57 9 view .LVU481 .LBB1385: .LBB1383: .LBB1379: .LBB1377: .LBB1375: .loc 2 57 9 view .LVU482 .loc 2 57 9 view .LVU483 movl %edi, %edx # cpu, cpu .LVL87: .loc 2 57 9 is_stmt 0 view .LVU484 That MOV in there is drowned in debugging information and latter makes it hard to follow the asm. And that DWARF info is not really needed for asm output staring. Disable the debug information generation which clutters the asm output unnecessarily: bsp_resume: # arch/x86/kernel/cpu/common.c:1869: if (this_cpu->c_bsp_resume) movq this_cpu(%rip), %rax # this_cpu, this_cpu movq 64(%rax), %rax # this_cpu.94_1->c_bsp_resume, _2 # arch/x86/kernel/cpu/common.c:1869: if (this_cpu->c_bsp_resume) testq %rax, %rax # _2 je .L8 #, # arch/x86/kernel/cpu/common.c:1870: this_cpu->c_bsp_resume(&boot_cpu_data); movq $boot_cpu_data, %rdi #, jmp __x86_indirect_thunk_rax .L8: # arch/x86/kernel/cpu/common.c:1871: } rep ret .size bsp_resume, .-bsp_resume [ bp: write commit message. ] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Borislav Petkov <bp@suse.de>
* kallsyms: include <asm/bitsperlong.h> instead of <asm/types.h>Masahiro Yamada2019-02-191-1/+1
| | | | | | | <asm/bitsperlong.h> is enough to include the definition of BITS_PER_LONG. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kallsyms: remove unneeded memset() callsMasahiro Yamada2019-02-191-3/+0
| | | | | | | Global variables in the .bss section are zeroed out before the program starts to run. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kallsyms: add static qualifiers where missingMasahiro Yamada2019-02-191-4/+4
| | | | | | | | | | | | | Fix the following sparse warnings: scripts/kallsyms.c:65:5: warning: symbol 'token_profit' was not declared. Should it be static? scripts/kallsyms.c:68:15: warning: symbol 'best_table' was not declared. Should it be static? scripts/kallsyms.c:69:15: warning: symbol 'best_table_len' was not declared. Should it be static? Also, remove 'inline' from is_arm_mapping_symbol(). The compiler will inline it anyway when it is appropriate to do so. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: remove unnecessary in-subshell executionMasahiro Yamada2019-01-283-15/+14
| | | | | | | The commands surrounded by ( ) are executed in a subshell, but in most cases, we do not need to spawn an extra subshell. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: add real-prereqs shorthand for $(filter-out FORCE,$^)Masahiro Yamada2019-01-284-13/+20
| | | | | | | | | | | | | | | | | | | In Kbuild, if_changed and friends must have FORCE as a prerequisite. Hence, $(filter-out FORCE,$^) or $(filter-out $(PHONY),$^) is a common idiom to get the names of all the prerequisites except phony targets. Add real-prereqs as a shorthand. Note: We cannot replace $(filter %.o,$^) in cmd_link_multi-m because $^ may include auto-generated dependencies from the .*.cmd file when a single object module is changed into a multi object module. Refer to commit 69ea912fda74 ("kbuild: remove unneeded link_multi_deps"). I added some comment to avoid accidental breakage. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Rob Herring <robh@kernel.org>
* kbuild: simplify rules of data compression with size appendingMasahiro Yamada2019-01-281-11/+7
| | | | | | | | | | All the callers of size_append pass $(filter-out FORCE,$^). Move $(filter-out FORCE,$^) to the definition of size_append. This makes the callers cleaner because $(call ...) is unneeded for a macro with no argument. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: merge KBUILD_VMLINUX_{INIT,MAIN} into KBUILD_VMLINUX_OBJSMasahiro Yamada2019-01-281-18/+10
| | | | | | | | | | The top Makefile does not need to export KBUILD_VMLINUX_INIT and KBUILD_VMLINUX_MAIN separately. Put every built-in.a into KBUILD_VMLINUX_OBJS. The order of $(head-y), $(init-y), $(core-y), ... is still retained. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: remove top-level built-in.aMasahiro Yamada2019-01-282-30/+8
| | | | | | | | | | | | | | The symbol table in the final archive is unneeded; the linker does not require the symbol table after the --whole-archive option. Every object file in the archive is included in the link anyway. Pass thin archives from subdirectories directly to the linker, and remove the final archiving step. Fix up the document and comments as well. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Nicholas Piggin <npiggin@gmail.com>
* kbuild: skip 'addtree' and 'flags' magic for external module buildMasahiro Yamada2019-01-282-7/+10
| | | | | | | | When building an external module, $(obj) is the absolute path to it. The header search paths from ccflags-y etc. should not be tweaked. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* Merge tag 'gcc-plugins-v5.0-rc4' of ↵Linus Torvalds2019-01-211-2/+21
|\ | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull gcc-plugins fixes from Kees Cook: "Fix ARM per-task stack protector plugin under GCC 9 (Ard Biesheuvel)" * tag 'gcc-plugins-v5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: gcc-plugins: arm_ssp_per_task_plugin: fix for GCC 9+ gcc-plugins: arm_ssp_per_task_plugin: sign extend the SP mask
| * gcc-plugins: arm_ssp_per_task_plugin: fix for GCC 9+Ard Biesheuvel2019-01-201-0/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | GCC 9 reworks the way the references to the stack canary are emitted, to prevent the value from being spilled to the stack before the final comparison in the epilogue, defeating the purpose, given that the spill slot is under control of the attacker that we are protecting ourselves from. Since our canary value address is obtained without accessing memory (as opposed to pre-v7 code that will obtain it from a literal pool), it is unlikely (although not guaranteed) that the compiler will spill the canary value in the same way, so let's just disable this improvement when building with GCC9+. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Kees Cook <keescook@chromium.org>
| * gcc-plugins: arm_ssp_per_task_plugin: sign extend the SP maskArd Biesheuvel2019-01-201-2/+3
| | | | | | | | | | | | | | | | | | | | The ARM per-task stack protector GCC plugin hits an assert in the compiler in some case, due to the fact the the SP mask expression is not sign-extended as it should be. So fix that. Suggested-by: Kugan Vivekanandarajah <kugan.vivekanandarajah@linaro.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Kees Cook <keescook@chromium.org>
* | kbuild: remove unused baseprereqMasahiro Yamada2019-01-141-4/+0
| | | | | | | | | | | | | | Commit eea199b445f6 ("kbuild: remove unnecessary LEX_PREFIX and YACC_PREFIX") removed the last users of this macro. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* | kconfig: clean generated *conf-cfg filesMasahiro Yamada2019-01-141-1/+1
|/ | | | | | | | | I accidentally dropped '*' in the previous renaming patch. Revive it so that 'make mrproper' can clean the generated files. Fixes: d86271af6460 ("kconfig: rename generated .*conf-cfg to *conf-cfg") Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* Merge tag 'remove-dma_zalloc_coherent-5.0' of ↵Linus Torvalds2019-01-122-14/+5
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.infradead.org/users/hch/dma-mapping Pull dma_zalloc_coherent() removal from Christoph Hellwig: "We've always had a weird situation around dma_zalloc_coherent. To safely support mapping the allocations to userspace major architectures like x86 and arm have always zeroed allocations from dma_alloc_coherent, but a couple other architectures were missing that zeroing either always or in corner cases. Then later we grew anothe dma_zalloc_coherent interface to explicitly request zeroing, but that just added __GFP_ZERO to the allocation flags, which for some allocators that didn't end up using the page allocator ended up being a no-op and still not zeroing the allocations. So for this merge window I fixed up all remaining architectures to zero the memory in dma_alloc_coherent, and made dma_zalloc_coherent a no-op wrapper around dma_alloc_coherent, which fixes all of the above issues. dma_zalloc_coherent is now pointless and can go away, and Luis helped me writing a cocchinelle script and patch series to kill it, which I think we should apply now just after -rc1 to finally settle these issue" * tag 'remove-dma_zalloc_coherent-5.0' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: remove dma_zalloc_coherent() cross-tree: phase out dma_zalloc_coherent() on headers cross-tree: phase out dma_zalloc_coherent()
| * dma-mapping: remove dma_zalloc_coherent()Luis Chamberlain2019-01-082-14/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | dma_zalloc_coherent() is no longer needed as it has no users because dma_alloc_coherent() already zeroes out memory for us. The Coccinelle grammar rule that used to check for dma_alloc_coherent() + memset() is modified so that it just tells the user that the memset is not needed anymore. Suggested-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
* | x86, modpost: Replace last remnants of RETPOLINE with CONFIG_RETPOLINEWANG Chao2019-01-091-1/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 4cd24de3a098 ("x86/retpoline: Make CONFIG_RETPOLINE depend on compiler support") replaced the RETPOLINE define with CONFIG_RETPOLINE checks. Remove the remaining pieces. [ bp: Massage commit message. ] Fixes: 4cd24de3a098 ("x86/retpoline: Make CONFIG_RETPOLINE depend on compiler support") Signed-off-by: WANG Chao <chao.wang@ucloud.cn> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David Woodhouse <dwmw@amazon.co.uk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Jessica Yu <jeyu@kernel.org> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Kees Cook <keescook@chromium.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: linux-kbuild@vger.kernel.org Cc: srinivas.eeda@oracle.com Cc: stable <stable@vger.kernel.org> Cc: x86-ml <x86@kernel.org> Link: https://lkml.kernel.org/r/20181210163725.95977-1-chao.wang@ucloud.cn
* kconfig: rename generated .*conf-cfg to *conf-cfgMasahiro Yamada2019-01-062-18/+19
| | | | | | | Remove the dot-prefixing since it is just a matter of the .gitignore file. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: use assignment instead of define ... endef for filechk_* rulesMasahiro Yamada2019-01-062-7/+5
| | | | | | | | | | | | You do not have to use define ... endef for filechk_* rules. For simple cases, the use of assignment looks cleaner, IMHO. I updated the usage for scripts/Kbuild.include in case somebody misunderstands the 'define ... endif' is the requirement. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* kbuild: generate asm-generic wrappers if mandatory headers are missingMasahiro Yamada2019-01-062-7/+4
| | | | | | | | | | | | | | | | | | | | Some time ago, Sam pointed out a certain degree of overwrap between generic-y and mandatory-y. (https://lkml.org/lkml/2017/7/10/121) I tweaked the meaning of mandatory-y a little bit; now it defines the minimum set of ASM headers that all architectures must have. If arch does not have specific implementation of a mandatory header, Kbuild will let it fallback to the asm-generic one by automatically generating a wrapper. This will allow to drop lots of redundant generic-y defines. Previously, "mandatory" was used in the context of UAPI, but I guess this can be extended to kernel space ASM headers. Suggested-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Sam Ravnborg <sam@ravnborg.org>
* kbuild: change filechk to surround the given command with { }Masahiro Yamada2019-01-062-3/+2
| | | | | | | | | | | filechk_* rules often consist of multiple 'echo' lines. They must be surrounded with { } or ( ) to work correctly. Otherwise, only the string from the last 'echo' would be written into the target. Let's take care of that in the 'filechk' in scripts/Kbuild.include to clean up filechk_* rules. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: remove redundant target cleaning on failureMasahiro Yamada2019-01-061-14/+7
| | | | | | | | | | | | | Since commit 9c2af1c7377a ("kbuild: add .DELETE_ON_ERROR special target"), the target file is automatically deleted on failure. The boilerplate code ... || { rm -f $@; false; } is unneeded. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: clean up rule_dtc_dt_yamlMasahiro Yamada2019-01-061-2/+2
| | | | | | | | | | Commit 3a2429e1faf4 ("kbuild: change if_changed_rule for multi-line recipe") and commit 4f0e3a57d6eb ("kbuild: Add support for DT binding schema checks") came in via different sub-systems. This is a follow-up cleanup. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kbuild: remove UIMAGE_IN and UIMAGE_OUTMasahiro Yamada2019-01-061-4/+2
| | | | | | | | | The only/last user of UIMAGE_IN/OUT was removed by commit 4722a3e6b716 ("microblaze: fix multiple bugs in arch/microblaze/boot/Makefile"). The input and output should always be $< and $@. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* jump_label: move 'asm goto' support test to KconfigMasahiro Yamada2019-01-061-1/+1
| | | | | | | | | | | | | | | | | | | | | Currently, CONFIG_JUMP_LABEL just means "I _want_ to use jump label". The jump label is controlled by HAVE_JUMP_LABEL, which is defined like this: #if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL) # define HAVE_JUMP_LABEL #endif We can improve this by testing 'asm goto' support in Kconfig, then make JUMP_LABEL depend on CC_HAS_ASM_GOTO. Ugly #ifdef HAVE_JUMP_LABEL will go away, and CONFIG_JUMP_LABEL will match to the real kernel capability. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
* kallsyms: lower alignment on ARMMathias Krause2019-01-061-2/+2
| | | | | | | | | | | | | | | | | | As mentioned in the info pages of gas, the '.align' pseudo op's interpretation of the alignment value is architecture specific. It might either be a byte value or taken to the power of two. On ARM it's actually the latter which leads to unnecessary large alignments of 16 bytes for 32 bit builds or 256 bytes for 64 bit builds. Fix this by switching to '.balign' instead which is consistent across all architectures. Signed-off-by: Mathias Krause <minipli@googlemail.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* scripts: coccinelle: boolinit: drop warnings on named constantsJulia Lawall2019-01-061-0/+5
| | | | | | | | | | Coccinelle doesn't always have access to the values of named (#define) constants, and they may likely often be bound to true and false values anyway, resulting in false positives. So stop warning about them. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* scripts: coccinelle: check for redeclarationJulia Lawall2019-01-061-0/+3
| | | | | | | | Avoid reporting on the use of an iterator index variable when the variable is redeclared. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kconfig: remove unused "file" field of yylval unionMasahiro Yamada2019-01-061-1/+0
| | | | | | This has never been used. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2019-01-051-20/+9
|\ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull trivial vfs updates from Al Viro: "A few cleanups + Neil's namespace_unlock() optimization" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: exec: make prepare_bprm_creds static genheaders: %-<width>s had been there since v6; %-*s - since v7 VFS: use synchronize_rcu_expedited() in namespace_unlock() iov_iter: reduce code duplication
| * genheaders: %-<width>s had been there since v6; %-*s - since v7Al Viro2018-12-101-20/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Please, use at least K&R C; printf had been able to left-adjust a field for as long as stdio existed and use of '*' for variable width had been there since v7. Yes, the first edition of K&R didn't cover the latter feature (it slightly predates v7), but you are using a much later feature of the language than that - in K&R C static char *stoupperx(const char *s) { ... } would've been spelled as static char *stoupperx(s) char *s; { ... } While we are at it, the use of strstr() is bogus - it finds the _first_ instance of substring, so it's a lousy fit for checking if a string ends with given suffix... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | checkpatch: add Co-developed-by to signature tagsJorge Ramirez-Ortiz2019-01-041-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As per Documentation/process/submitting-patches, Co-developed-by is a valid signature. This commit removes the warning. Link: http://lkml.kernel.org/r/1544808928-20002-3-git-send-email-jorge.ramirez-ortiz@linaro.org Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Himanshu Jha <himanshujha199640@gmail.com> Cc: Joe Perches <joe@perches.com> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Niklas Cassel <niklas.cassel@linaro.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | scripts/gdb: fix lx-version string outputDu Changbin2019-01-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A bug is present in GDB which causes early string termination when parsing variables. This has been reported [0], but we should ensure that we can support at least basic printing of the core kernel strings. For current gdb version (has been tested with 7.3 and 8.1), 'lx-version' only prints one character. (gdb) lx-version L(gdb) This can be fixed by casting 'linux_banner' as (char *). (gdb) lx-version Linux version 4.19.0-rc1+ (changbin@acer) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #21 SMP Sat Sep 1 21:43:30 CST 2018 [0] https://sourceware.org/bugzilla/show_bug.cgi?id=20077 [kbingham@kernel.org: add detail to commit message] Link: http://lkml.kernel.org/r/20181111162035.8356-1-kieran.bingham@ideasonboard.com Fixes: 2d061d999424 ("scripts/gdb: add version command") Signed-off-by: Du Changbin <changbin.du@gmail.com> Signed-off-by: Kieran Bingham <kbingham@kernel.org> Acked-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | checkpatch: warn on const char foo[] = "bar"; declarationsJoe Perches2019-01-041-2/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These declarations should generally be static const to avoid poor compilation and runtime performance where compilers tend to initialize the const declaration for every call instead of using .rodata for the string. Miscellanea: - Convert spaces to tabs for indentation in 2 adjacent checks Link: http://lkml.kernel.org/r/10ea5f4b087dc911e41e187a4a2b5e79c7529aa3.camel@perches.com Signed-off-by: Joe Perches <joe@perches.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge tag 'trace-v4.21' of ↵Linus Torvalds2018-12-312-1/+14
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing updates from Steven Rostedt: - Rework of the kprobe/uprobe and synthetic events to consolidate all the dynamic event code. This will make changes in the future easier. - Partial rewrite of the function graph tracing infrastructure. This will allow for multiple users of hooking onto functions to get the callback (return) of the function. This is the ground work for having kprobes and function graph tracer using one code base. - Clean up of the histogram code that will facilitate adding more features to the histograms in the future. - Addition of str_has_prefix() and a few use cases. There currently is a similar function strstart() that is used in a few places, but only returns a bool and not a length. These instances will be removed in the future to use str_has_prefix() instead. - A few other various clean ups as well. * tag 'trace-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (57 commits) tracing: Use the return of str_has_prefix() to remove open coded numbers tracing: Have the historgram use the result of str_has_prefix() for len of prefix tracing: Use str_has_prefix() instead of using fixed sizes tracing: Use str_has_prefix() helper for histogram code string.h: Add str_has_prefix() helper function tracing: Make function ‘ftrace_exports’ static tracing: Simplify printf'ing in seq_print_sym tracing: Avoid -Wformat-nonliteral warning tracing: Merge seq_print_sym_short() and seq_print_sym_offset() tracing: Add hist trigger comments for variable-related fields tracing: Remove hist trigger synth_var_refs tracing: Use hist trigger's var_ref array to destroy var_refs tracing: Remove open-coding of hist trigger var_ref management tracing: Use var_refs[] for hist trigger reference checking tracing: Change strlen to sizeof for hist trigger static strings tracing: Remove unnecessary hist trigger struct field tracing: Fix ftrace_graph_get_ret_stack() to use task and not current seq_buf: Use size_t for len in seq_buf_puts() seq_buf: Make seq_buf_puts() null-terminate the buffer arm64: Use ftrace_graph_get_ret_stack() instead of curr_ret_stack ...
| * | scripts/recordmcount.{c,pl}: support -ffunction-sections .text.* section namesJoe Lawrence2018-12-092-1/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When building with -ffunction-sections, the compiler will place each function into its own ELF section, prefixed with ".text". For example, a simple test module with functions test_module_do_work() and test_module_wq_func(): % objdump --section-headers test_module.o | awk '/\.text/{print $2}' .text .text.test_module_do_work .text.test_module_wq_func .init.text .exit.text Adjust the recordmcount scripts to look for ".text" as a section name prefix. This will ensure that those functions will be included in the __mcount_loc relocations: % objdump --reloc --section __mcount_loc test_module.o OFFSET TYPE VALUE 0000000000000000 R_X86_64_64 .text.test_module_do_work 0000000000000008 R_X86_64_64 .text.test_module_wq_func 0000000000000010 R_X86_64_64 .init.text Link: http://lkml.kernel.org/r/1542745158-25392-2-git-send-email-joe.lawrence@redhat.com Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
* | | Merge tag 'kconfig-v4.21' of ↵Linus Torvalds2018-12-2946-645/+499
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kconfig updates from Masahiro Yamada: - support -y option for merge_config.sh to avoid downgrading =y to =m - remove S_OTHER symbol type, and touch include/config/*.h files correctly - fix file name and line number in lexer warnings - fix memory leak when EOF is encountered in quotation - resolve all shift/reduce conflicts of the parser - warn no new line at end of file - make 'source' statement more strict to take only string literal - rewrite the lexer and remove the keyword lookup table - convert to SPDX License Identifier - compile C files independently instead of including them from zconf.y - fix various warnings of gconfig - misc cleanups * tag 'kconfig-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (39 commits) kconfig: surround dbg_sym_flags with #ifdef DEBUG to fix gconf warning kconfig: split images.c out of qconf.cc/gconf.c to fix gconf warnings kconfig: add static qualifiers to fix gconf warnings kconfig: split the lexer out of zconf.y kconfig: split some C files out of zconf.y kconfig: convert to SPDX License Identifier kconfig: remove keyword lookup table entirely kconfig: update current_pos in the second lexer kconfig: switch to ASSIGN_VAL state in the second lexer kconfig: stop associating kconf_id with yylval kconfig: refactor end token rules kconfig: stop supporting '.' and '/' in unquoted words treewide: surround Kconfig file paths with double quotes microblaze: surround string default in Kconfig with double quotes kconfig: use T_WORD instead of T_VARIABLE for variables kconfig: use specific tokens instead of T_ASSIGN for assignments kconfig: refactor scanning and parsing "option" properties kconfig: use distinct tokens for type and default properties kconfig: remove redundant token defines kconfig: rename depends_list to comment_option_list ...
| * | | kconfig: surround dbg_sym_flags with #ifdef DEBUG to fix gconf warningMasahiro Yamada2018-12-281-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the following warning: no previous prototype for ‘dbg_sym_flags’ [-Wmissing-prototypes] Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * | | kconfig: split images.c out of qconf.cc/gconf.c to fix gconf warningsMasahiro Yamada2018-12-285-19/+54
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, images.c is included by qconf.cc and gconf.c. qconf.cc uses all of xpm_* arrays, but gconf.c only some of them. Hence, lots of "... defined but not used" warnings are displayed while compiling gconf.c Splitting out images.c fixes the warnings. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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