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| author | Chris Metcalf | 2011-06-02 16:19:41 +0200 |
|---|---|---|
| committer | Pekka Enberg | 2011-06-03 18:33:49 +0200 |
| commit | d4d84fef6d0366b585b7de13527a0faeca84d9ce (patch) | |
| tree | c67449976f955cff4a2fe8a74affc2dd67c37b7e /mm/slab.c | |
| parent | Linux 3.0-rc1 (diff) | |
| download | kernel-qcow2-linux-d4d84fef6d0366b585b7de13527a0faeca84d9ce.tar.gz kernel-qcow2-linux-d4d84fef6d0366b585b7de13527a0faeca84d9ce.tar.xz kernel-qcow2-linux-d4d84fef6d0366b585b7de13527a0faeca84d9ce.zip | |
slub: always align cpu_slab to honor cmpxchg_double requirement
On an architecture without CMPXCHG_LOCAL but with DEBUG_VM enabled,
the VM_BUG_ON() in __pcpu_double_call_return_bool() will cause an early
panic during boot unless we always align cpu_slab properly.
In principle we could remove the alignment-testing VM_BUG_ON() for
architectures that don't have CMPXCHG_LOCAL, but leaving it in means
that new code will tend not to break x86 even if it is introduced
on another platform, and it's low cost to require alignment.
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'mm/slab.c')
0 files changed, 0 insertions, 0 deletions