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* clocksource: pass clocksource to read() callbackMagnus Damm2009-04-211-1/+6
| | | | | | | | | | | | | | Pass clocksource pointer to the read() callback for clocksources. This allows us to share the callback between multiple instances. [hugh@veritas.com: fix powerpc build of clocksource pass clocksource mods] [akpm@linux-foundation.org: cleanup] Signed-off-by: Magnus Damm <damm@igel.co.jp> Acked-by: John Stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Separate out common fstatat code into vfs_fstatatOleg Drokin2009-04-211-14/+5
| | | | | | | | | | This is a version incorporating Christoph's suggestion. Separate out common *fstatat functionality into a single function instead of duplicating it all over the code. Signed-off-by: Oleg Drokin <green@linuxhacker.ru> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* sparc: remove some pointless conditionals before kfree()Wei Yongjun2009-04-151-4/+2
| | | | | | | Remove some pointless conditionals before kfree(). Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc: asm/atomic.h on 32bit should include asm/system.h for xchgStephen Rothwell2009-04-151-0/+2
| | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Fix smp_callin() locking.David S. Miller2009-04-151-2/+2
| | | | | | | | | Interrupts must be disabled when taking the IPI lock. Caught by lockdep. Reported-by: Meelis Roos <mroos@linux.ee> Signed-off-by: David S. Miller <davem@davemloft.net>
* parport: Fix various uses of parport_pcAlan Cox2009-04-141-2/+3
| | | | | | | These got overlooked first time around. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sparc: Hook up sys_preadv and sys_pwritevDavid S. Miller2009-04-083-4/+6
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: add_node_ranges() must be __initDavid S. Miller2009-04-081-1/+1
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Fix section mismatch warnings in PCI controller drivers.David S. Miller2009-04-085-20/+20
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Fix section mismatch warnings in power driver.David S. Miller2009-04-081-1/+1
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: get_cells() can't be marked __initDavid S. Miller2009-04-081-2/+1
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumaskLinus Torvalds2009-04-051-0/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask: (36 commits) cpumask: remove cpumask allocation from idle_balance, fix numa, cpumask: move numa_node_id default implementation to topology.h, fix cpumask: remove cpumask allocation from idle_balance x86: cpumask: x86 mmio-mod.c use cpumask_var_t for downed_cpus x86: cpumask: update 32-bit APM not to mug current->cpus_allowed x86: microcode: cleanup x86: cpumask: use work_on_cpu in arch/x86/kernel/microcode_core.c cpumask: fix CONFIG_CPUMASK_OFFSTACK=y cpu hotunplug crash numa, cpumask: move numa_node_id default implementation to topology.h cpumask: convert node_to_cpumask_map[] to cpumask_var_t cpumask: remove x86 cpumask_t uses. cpumask: use cpumask_var_t in uv_flush_tlb_others. cpumask: remove cpumask_t assignment from vector_allocation_domain() cpumask: make Xen use the new operators. cpumask: clean up summit's send_IPI functions cpumask: use new cpumask functions throughout x86 x86: unify cpu_callin_mask/cpu_callout_mask/cpu_initialized_mask/cpu_sibling_setup_mask cpumask: convert struct cpuinfo_x86's llc_shared_map to cpumask_var_t cpumask: convert node_to_cpumask_map[] to cpumask_var_t x86: unify 32 and 64-bit node_to_cpumask_map ...
| * Merge branch 'cpumask-for-linus' of ↵Rusty Russell2009-03-311-0/+2
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip Conflicts: arch/x86/include/asm/topology.h drivers/oprofile/buffer_sync.c (Both cases: changed in Linus' tree, removed in Ingo's).
| | * Merge branch 'linus' into cpumask-for-linusIngo Molnar2009-03-3010-31/+20
| | |\ | | | | | | | | | | | | | | | | Conflicts: arch/x86/kernel/cpu/common.c
| | * | numa, cpumask: move numa_node_id default implementation to topology.h, fixStephen Rothwell2009-03-191-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: build fix for powerpc and sparc Today's linux-next build (powerpc allyesconfig) failed like this: > In file included from include/linux/mmzone.h:776, > from include/linux/gfp.h:5, > from include/linux/kmod.h:23, > from include/linux/module.h:14, > from init/version.c:11: > arch/powerpc/include/asm/mmzone.h:32: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'numa_cpumask_lookup_table' Caused by commit 082edb7bf443eb8eda15b482d16ad9dd8137ad24 ("numa, cpumask: move numa_node_id default implementation to topology.h") from the cpus4096 tree which removed the include of linux/topology.h from linux/mmzone.h. Same for sparc64 defconfig. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-b: Rusty Russell <rusty@rustcorp.com.au> Cc: ppc-dev <linuxppc-dev@ozlabs.org> LKML-Reference: <20090319220322.3baa4613.sfr@canb.auug.org.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | Merge commit 'v2.6.29-rc8' into cpus4096Ingo Molnar2009-03-131-10/+19
| | |\ \
* | | \ \ Merge branch 'for-linus' of ↵Linus Torvalds2009-04-041-1/+1
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (28 commits) trivial: Update my email address trivial: NULL noise: drivers/mtd/tests/mtd_*test.c trivial: NULL noise: drivers/media/dvb/frontends/drx397xD_fw.h trivial: Fix misspelling of "Celsius". trivial: remove unused variable 'path' in alloc_file() trivial: fix a pdlfush -> pdflush typo in comment trivial: jbd header comment typo fix for JBD_PARANOID_IOFAIL trivial: wusb: Storage class should be before const qualifier trivial: drivers/char/bsr.c: Storage class should be before const qualifier trivial: h8300: Storage class should be before const qualifier trivial: fix where cgroup documentation is not correctly referred to trivial: Give the right path in Documentation example trivial: MTD: remove EOL from MODULE_DESCRIPTION trivial: Fix typo in bio_split()'s documentation trivial: PWM: fix of #endif comment trivial: fix typos/grammar errors in Kconfig texts trivial: Fix misspelling of firmware trivial: cgroups: documentation typo and spelling corrections trivial: Update contact info for Jochen Hein trivial: fix typo "resgister" -> "register" ...
| * | | | | trivial: Fix misspelling of firmwareNick Andrew2009-03-301-1/+1
| | |_|_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix misspelling of firmware. Signed-off-by: Nick Andrew <nick@nick-andrew.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | | | | Allow rwlocks to re-enable interruptsRobin Holt2009-04-032-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pass the original flags to rwlock arch-code, so that it can re-enable interrupts if implemented for that architecture. Initially, make __raw_read_lock_flags and __raw_write_lock_flags stubs which just do the same thing as non-flags variants. Signed-off-by: Petr Tesarik <ptesarik@suse.cz> Signed-off-by: Robin Holt <holt@sgi.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: <linux-arch@vger.kernel.org> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | Simplify copy_thread()Alexey Dobriyan2009-04-032-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | First argument unused since 2.3.11. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | generic debug pagealloc: build fixAkinobu Mita2009-04-031-9/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes a build failure with generic debug pagealloc: mm/debug-pagealloc.c: In function 'set_page_poison': mm/debug-pagealloc.c:8: error: 'struct page' has no member named 'debug_flags' mm/debug-pagealloc.c: In function 'clear_page_poison': mm/debug-pagealloc.c:13: error: 'struct page' has no member named 'debug_flags' mm/debug-pagealloc.c: In function 'page_poison': mm/debug-pagealloc.c:18: error: 'struct page' has no member named 'debug_flags' mm/debug-pagealloc.c: At top level: mm/debug-pagealloc.c:120: error: redefinition of 'kernel_map_pages' include/linux/mm.h:1278: error: previous definition of 'kernel_map_pages' was here mm/debug-pagealloc.c: In function 'kernel_map_pages': mm/debug-pagealloc.c:122: error: 'debug_pagealloc_enabled' undeclared (first use in this function) by fixing - debug_flags should be in struct page - define DEBUG_PAGEALLOC config option for all architectures Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Reported-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | mm: use debug_kmap_atomicAkinobu Mita2009-04-011-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use debug_kmap_atomic in kmap_atomic, kmap_atomic_pfn, and iomap_atomic_prot_pfn. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | generic debug pageallocAkinobu Mita2009-04-012-1/+5
| |/ / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CONFIG_DEBUG_PAGEALLOC is now supported by x86, powerpc, sparc64, and s390. This patch implements it for the rest of the architectures by filling the pages with poison byte patterns after free_pages() and verifying the poison patterns before alloc_pages(). This generic one cannot detect invalid page accesses immediately but invalid read access may cause invalid dereference by poisoned memory and invalid write access can be detected after a long delay. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2009-03-3115-58/+72
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc64: Fix reset hangs on Niagara systems. cpumask: use mm_cpumask() wrapper: sparc cpumask: remove dangerous CPU_MASK_ALL_PTR, &CPU_MASK_ALL.: sparc cpumask: remove the now-obsoleted pcibus_to_cpumask(): sparc cpumask: remove cpu_coregroup_map: sparc cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: sparc cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: sparc64 cpumask: Use accessors code.: sparc64 cpumask: Use accessors code: sparc cpumask: arch_send_call_function_ipi_mask: sparc cpumask: Use smp_call_function_many(): sparc64
| * \ \ \ Merge branch 'master' of ↵David S. Miller2009-03-3014-57/+50
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ssh://master.kernel.org/home/ftp/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask-for-sparc Conflicts: arch/sparc/kernel/smp_64.c
| | * | | | cpumask: use mm_cpumask() wrapper: sparcRusty Russell2009-03-164-18/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Makes code futureproof against the impending change to mm->cpu_vm_mask. It's also a chance to use the new cpumask_ ops which take a pointer (the older ones are deprecated, but there's no hurry for arch code). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * | | | cpumask: remove dangerous CPU_MASK_ALL_PTR, &CPU_MASK_ALL.: sparcRusty Russell2009-03-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup (Thanks to Al Viro for reminding me of this, via Ingo) CPU_MASK_ALL is the (deprecated) "all bits set" cpumask, defined as so: #define CPU_MASK_ALL (cpumask_t) { { ... } } Taking the address of such a temporary is questionable at best, unfortunately 321a8e9d (cpumask: add CPU_MASK_ALL_PTR macro) added CPU_MASK_ALL_PTR: #define CPU_MASK_ALL_PTR (&CPU_MASK_ALL) Which formalizes this practice. One day gcc could bite us over this usage (though we seem to have gotten away with it so far). So replace everywhere which used &CPU_MASK_ALL or CPU_MASK_ALL_PTR with the modern "cpu_all_mask" (a real struct cpumask *), and remove CPU_MASK_ALL_PTR altogether. Also remove the confusing and deprecated large-NR_CPUS-only "cpu_mask_all". Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Ingo Molnar <mingo@elte.hu> Reported-by: Al Viro <viro@zeniv.linux.org.uk> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Mike Travis <travis@sgi.com>
| | * | | | cpumask: remove the now-obsoleted pcibus_to_cpumask(): sparcRusty Russell2009-03-161-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: reduce stack usage for large NR_CPUS cpumask_of_pcibus() is the new version. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * | | | cpumask: remove cpu_coregroup_map: sparcRusty Russell2009-03-161-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup cpu_coregroup_mask is the New Hotness. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * | | | cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: sparcRusty Russell2009-03-164-17/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup, futureproof In fact, all cpumask ops will only be valid (in general) for bit numbers < nr_cpu_ids. So use that instead of NR_CPUS in various places. This is always safe: no cpu number can be >= nr_cpu_ids, and nr_cpu_ids is initialized to NR_CPUS at boot. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Acked-by: Ingo Molnar <mingo@elte.hu>
| | * | | | cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: ↵Rusty Russell2009-03-163-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sparc64 Impact: cleanup, futureproof In fact, all cpumask ops will only be valid (in general) for bit numbers < nr_cpu_ids. So use that instead of NR_CPUS in various places. This is always safe: no cpu number can be >= nr_cpu_ids, and nr_cpu_ids is initialized to NR_CPUS at boot. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Acked-by: Ingo Molnar <mingo@elte.hu>
| | * | | | cpumask: Use accessors code.: sparc64Rusty Russell2009-03-162-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: use new API Use the accessors rather than frobbing bits directly. Most of this is in arch code I haven't even compiled, but is straightforward. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com>
| | * | | | cpumask: Use accessors code: sparcRusty Russell2009-03-163-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: use new API Use the accessors rather than frobbing bits directly. Most of this is in arch code I haven't even compiled, but it is mostly straightforward. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com>
| | * | | | cpumask: arch_send_call_function_ipi_mask: sparcRusty Russell2009-03-162-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We're weaning the core code off handing cpumask's around on-stack. This introduces arch_send_call_function_ipi_mask(), and by defining it, the old arch_send_call_function_ipi is defined by the core code. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| | * | | | cpumask: Use smp_call_function_many(): sparc64Rusty Russell2009-03-161-1/+1
| | | |_|/ | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Use new API Change smp_call_function_mask() callers to smp_call_function_many(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com>
| * | | | sparc64: Fix reset hangs on Niagara systems.David S. Miller2009-03-301-1/+22
| | |/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Hypervisor versions older than version 1.6.1 cannot handle leaving the profile counter overflow interrupt chirping when the system does a soft reset. So use a reboot notifier to shut off the NMI watchdog. Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumaskLinus Torvalds2009-03-313-8/+0
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask: oprofile: Thou shalt not call __exit functions from __init functions cpumask: remove the now-obsoleted pcibus_to_cpumask(): generic cpumask: remove cpumask_t from core cpumask: convert rcutorture.c cpumask: use new cpumask_ functions in core code. cpumask: remove references to struct irqaction's mask field. cpumask: use mm_cpumask() wrapper: kernel/fork.c cpumask: use set_cpu_active in init/main.c cpumask: remove node_to_first_cpu cpumask: fix seq_bitmap_*() functions. cpumask: remove dangerous CPU_MASK_ALL_PTR, &CPU_MASK_ALL
| * | | | cpumask: remove references to struct irqaction's mask field.Rusty Russell2009-03-302-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup It's unused, since about 1995. So remove all initialization of it in preparation for actually removing the field. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | cpumask: remove node_to_first_cpuRusty Russell2009-03-301-5/+0
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | Everyone defines it, and only one person uses it (arch/mips/sgi-ip27/ip27-nmi.c). So just open code it there. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: linux-mips@linux-mips.org
* / / / proc 2/2: remove struct proc_dir_entry::ownerAlexey Dobriyan2009-03-301-1/+0
|/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Setting ->owner as done currently (pde->owner = THIS_MODULE) is racy as correctly noted at bug #12454. Someone can lookup entry with NULL ->owner, thus not pinning enything, and release it later resulting in module refcount underflow. We can keep ->owner and supply it at registration time like ->proc_fops and ->data. But this leaves ->owner as easy-manipulative field (just one C assignment) and somebody will forget to unpin previous/pin current module when switching ->owner. ->proc_fops is declared as "const" which should give some thoughts. ->read_proc/->write_proc were just fixed to not require ->owner for protection. rmmod'ed directories will be empty and return "." and ".." -- no harm. And directories with tricky enough readdir and lookup shouldn't be modular. We definitely don't want such modular code. Removing ->owner will also make PDE smaller. So, let's nuke it. Kudos to Jeff Layton for reminding about this, let's say, oversight. http://bugzilla.kernel.org/show_bug.cgi?id=12454 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
* | | Merge branch 'linus' into percpu-cpumask-x86-for-linus-2Ingo Molnar2009-03-283-4/+4
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/sparc/kernel/time_64.c drivers/gpu/drm/drm_proc.c Manual merge to resolve build warning due to phys_addr_t type change on x86: drivers/gpu/drm/drm_info.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | sparc64: We need to use compat_sys_ustat() as well.David S. Miller2009-03-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sparc was missed in commit 2b1c6bd77d4e6a727ffac8630cd154b2144b751a ("generic compat_sys_ustat"). We definitely need it, since our __kernel_ino_t is "unsigned long". Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | Merge branch 'master' of /home/davem/src/GIT/linux-2.6/David S. Miller2009-03-283-3/+8
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| | * | | sparc64: Fix build of timer_interrupt().David Miller2009-03-271-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | arch/sparc/kernel/time_64.c: In function ‘timer_interrupt’: arch/sparc/kernel/time_64.c:732: error: ‘struct kernel_stat’ has no member named ‘irqs’ make[1]: *** [arch/sparc/kernel/time_64.o] Error 1 Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | sparc64: Fix MM refcount check in smp_flush_tlb_pending().David S. Miller2009-03-271-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As explained by Benjamin Herrenschmidt: > CPU 0 is running the context, task->mm == task->active_mm == your > context. The CPU is in userspace happily churning things. > > CPU 1 used to run it, not anymore, it's now running fancyfsd which > is a kernel thread, but current->active_mm still points to that > same context. > > Because there's only one "real" user, mm_users is 1 (but mm_count is > elevated, it's just that the presence on CPU 1 as active_mm has no > effect on mm_count(). > > At this point, fancyfsd decides to invalidate a mapping currently mapped > by that context, for example because a networked file has changed > remotely or something like that, using unmap_mapping_ranges(). > > So CPU 1 goes into the zapping code, which eventually ends up calling > flush_tlb_pending(). Your test will succeed, as current->active_mm is > indeed the target mm for the flush, and mm_users is indeed 1. So you > will -not- send an IPI to the other CPU, and CPU 0 will continue happily > accessing the pages that should have been unmapped. To fix this problem, check ->mm instead of ->active_mm, and this means: > So if you test current->mm, you effectively account for mm_users == 1, > so the only way the mm can be active on another processor is as a lazy > mm for a kernel thread. So your test should work properly as long > as you don't have a HW that will do speculative TLB reloads into the > TLB on that other CPU (and even if you do, you flush-on-switch-in should > get rid of any crap here). And therefore we should be OK. Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | | Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2Ingo Molnar2009-03-272-3/+4
|\ \ \ \ \ | |_|/ / / |/| | | / | | |_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/parisc/kernel/irq.c arch/x86/include/asm/fixmap_64.h arch/x86/include/asm/setup.h kernel/irq/handle.c Semantic merge: arch/x86/include/asm/fixmap.h Signed-off-by: Ingo Molnar <mingo@elte.hu>
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| *---. \ \ Merge branches 'x86/apic', 'x86/cpu', 'x86/fixmap', 'x86/mm', 'x86/sched', ↵Ingo Molnar2009-03-043-6/+6
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | 'x86/setup-lzma', 'x86/signal' and 'x86/urgent' into x86/core
| | * | | | | Merge branch 'x86/urgent' into x86/patIngo Molnar2009-03-011-0/+1
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| * | | | | | Merge branch 'linus' into x86/apicIngo Molnar2009-02-1332-409/+621
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/kernel/acpi/boot.c arch/x86/mm/fault.c
| * \ \ \ \ \ \ Merge branch 'linus' into core/percpuIngo Molnar2009-01-2710-44/+70
| |\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/kernel/setup_percpu.c
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