diff options
author | Anton Blanchard <anton@samba.org> | 2011-09-14 09:43:15 +0000 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-11-11 09:44:42 -0800 |
commit | 3493ce844f598f2b732a7e831afb6b1d5be4296f (patch) | |
tree | 903fdb0042e188751d4e02f19aeb9940daf12e93 /drivers/acpi | |
parent | 85e71ae3431f786adea84c0f879dc02d7474c566 (diff) |
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>
Diffstat (limited to 'drivers/acpi')
0 files changed, 0 insertions, 0 deletions