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authorAnton Blanchard <anton@samba.org>2011-09-14 09:43:15 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-09-20 15:53:23 +1000
commit8bdafa39a47265bc029838b35cc6585f69224afa (patch)
treecade05d9d67d3c6c421f46012961a46dacae5d70 /arch/sparc/lib/copy_user.S
parenta11940978bd598e65996b4f807cf4904793f7025 (diff)
powerpc: Fix deadlock in icswx code
The icswx code introduced an A-B B-A deadlock: CPU0 CPU1 ---- ---- lock(&anon_vma->mutex); lock(&mm->mmap_sem); lock(&anon_vma->mutex); lock(&mm->mmap_sem); Instead of using the mmap_sem to keep mm_users constant, take the page table spinlock. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: <stable@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/sparc/lib/copy_user.S')
0 files changed, 0 insertions, 0 deletions