diff options
| author | Wei Yang <richard.weiyang@gmail.com> | 2018-12-28 00:33:06 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-28 12:11:46 -0800 |
| commit | 1265ef2de4cef44cec91ba47009958eec6162836 (patch) | |
| tree | 829d03751e11bc48f8c1e72488a713e6c7559bbc | |
| parent | 221d7da66cd3435b28a0404f62168d25f57aca4e (diff) | |
mm/slub.c: remove validation on cpu_slab in __flush_cpu_slab()
cpu_slab is a per cpu variable which is allocated in all or none. If a
cpu_slab failed to be allocated, the slub is not usable.
We could use cpu_slab without validation in __flush_cpu_slab().
Link: http://lkml.kernel.org/r/20181103141218.22844-1-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/slub.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/mm/slub.c b/mm/slub.c index 08740c3f3745..3fd791c0dae5 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -2317,12 +2317,10 @@ static inline void __flush_cpu_slab(struct kmem_cache *s, int cpu) { struct kmem_cache_cpu *c = per_cpu_ptr(s->cpu_slab, cpu); - if (likely(c)) { - if (c->page) - flush_slab(s, c); + if (c->page) + flush_slab(s, c); - unfreeze_partials(s, c); - } + unfreeze_partials(s, c); } static void flush_cpu_slab(void *d) |