| commit | eaeafcd898108e4e026faf43ca41817f5de6ee66 | |
| author | Anton Blanchard <anton@samba.org> | |
| Wed, 14 Sep 2011 09:43:15 +0000 (14 09:43 +0000) | ||
| committer | Greg Kroah-Hartman <gregkh@suse.de> | |
| Fri, 11 Nov 2011 17:37:11 +0000 (11 09:37 -0800) | ||
| tree | 363bec39cbe790f0aa86c657214753ad4808e270 | treesnapshot (tar.gz zip) |
| parent | 71b1a9d35d6cbd2e37c1101ca5f779ca55f7fb03 | commitdiff |
powerpc: Fix deadlock in icswx code
commit 8bdafa39a47265bc029838b35cc6585f69224afa upstream.
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>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
commit 8bdafa39a47265bc029838b35cc6585f69224afa upstream.
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>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| arch/powerpc/mm/mmu_context_hash64.c | diffblobblamehistory |