diff options
| author | Manfred Spraul <manfred@colorfullife.com> | 2013-07-08 16:01:20 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-18 07:45:46 -0700 |
| commit | 49f7f31ab27de9bcaf2d12e1d0196400dadf6add (patch) | |
| tree | b95d01d51e49db3e79e8d49c8b856b54938612eb /virt/kvm/eventfd.c | |
| parent | 5cd37e921753eeff777a522aa78b0cc5a6ff7596 (diff) | |
ipc/util.c, ipc_rcu_alloc: cacheline align allocation
commit 196aa0132fc7261f34b10ae1bfb44abc1bc69b3c upstream.
Enforce that ipc_rcu_alloc returns a cacheline aligned pointer on SMP.
Rationale:
The SysV sem code tries to move the main spinlock into a seperate
cacheline (____cacheline_aligned_in_smp). This works only if
ipc_rcu_alloc returns cacheline aligned pointers. vmalloc and kmalloc
return cacheline algined pointers, the implementation of ipc_rcu_alloc
breaks that.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'virt/kvm/eventfd.c')
0 files changed, 0 insertions, 0 deletions