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authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-20 16:49:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-21 08:50:00 -0700
commit0e8e50e20c837eeec8323bba7dcd25fe5479194c (patch)
tree12c7ec767a4a8508be33442c6fb55c28a26c94cd /ipc
parent7798330ac8114c731cfab83e634c6ecedaa233d7 (diff)
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mm: make stack guard page logic use vm_prev pointer
Like the mlock() change previously, this makes the stack guard check code use vma->vm_prev to see what the mapping below the current stack is, rather than have to look it up with find_vma(). Also, accept an abutting stack segment, since that happens naturally if you split the stack with mlock or mprotect. Tested-by: Ian Campbell <ijc@hellion.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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