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| author | Anton Blanchard <anton@samba.org> | 2011-09-14 09:43:15 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-09-20 15:53:23 +1000 |
| commit | 8bdafa39a47265bc029838b35cc6585f69224afa (patch) | |
| tree | cade05d9d67d3c6c421f46012961a46dacae5d70 /drivers/tty | |
| parent | a11940978bd598e65996b4f807cf4904793f7025 (diff) | |
| download | op-kernel-dev-8bdafa39a47265bc029838b35cc6585f69224afa.zip op-kernel-dev-8bdafa39a47265bc029838b35cc6585f69224afa.tar.gz | |
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 'drivers/tty')
0 files changed, 0 insertions, 0 deletions
