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author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-31 03:10:19 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-31 03:10:19 +0300 |
commit | 5f34fe1cfc1bdd8b4711bbe37421fba4ed0d1ed4 (patch) | |
tree | 85b21c8bb0e53005bd970d648ca093acfd0584a3 /mm/memory.c | |
parent | eca1bf5b4fab56d2feb1572d34d59fcd92ea7df3 (diff) | |
parent | 6638101c1124c19c8a65b1645e4ecd09e0572f3e (diff) | |
download | linux-5f34fe1cfc1bdd8b4711bbe37421fba4ed0d1ed4.tar.xz |
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (63 commits)
stacktrace: provide save_stack_trace_tsk() weak alias
rcu: provide RCU options on non-preempt architectures too
printk: fix discarding message when recursion_bug
futex: clean up futex_(un)lock_pi fault handling
"Tree RCU": scalable classic RCU implementation
futex: rename field in futex_q to clarify single waiter semantics
x86/swiotlb: add default swiotlb_arch_range_needs_mapping
x86/swiotlb: add default phys<->bus conversion
x86: unify pci iommu setup and allow swiotlb to compile for 32 bit
x86: add swiotlb allocation functions
swiotlb: consolidate swiotlb info message printing
swiotlb: support bouncing of HighMem pages
swiotlb: factor out copy to/from device
swiotlb: add arch hook to force mapping
swiotlb: allow architectures to override phys<->bus<->phys conversions
swiotlb: add comment where we handle the overflow of a dma mask on 32 bit
rcu: fix rcutorture behavior during reboot
resources: skip sanity check of busy resources
swiotlb: move some definitions to header
swiotlb: allow architectures to override swiotlb pool allocation
...
Fix up trivial conflicts in
arch/x86/kernel/Makefile
arch/x86/mm/init_32.c
include/linux/hardirq.h
as per Ingo's suggestions.
Diffstat (limited to 'mm/memory.c')
-rw-r--r-- | mm/memory.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mm/memory.c b/mm/memory.c index f01b7eed6e16..0a2010a9518c 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3075,3 +3075,18 @@ void print_vma_addr(char *prefix, unsigned long ip) } up_read(¤t->mm->mmap_sem); } + +#ifdef CONFIG_PROVE_LOCKING +void might_fault(void) +{ + might_sleep(); + /* + * it would be nicer only to annotate paths which are not under + * pagefault_disable, however that requires a larger audit and + * providing helpers like get_user_atomic. + */ + if (!in_atomic() && current->mm) + might_lock_read(¤t->mm->mmap_sem); +} +EXPORT_SYMBOL(might_fault); +#endif |