slub: Remove useless statements in __slab_alloc

Two statements in __slab_alloc() do not have any effect.

1. c->page is already set to NULL by deactivate_slab() called right before.

2. gfpflags are masked in new_slab() before being passed to the page
   allocator. There is no need to mask gfpflags in __slab_alloc in particular
   since most frequent processing in __slab_alloc does not require the use of a
   gfpmask.

Cc: torvalds@linux-foundation.org
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

1 files changed, 0 insertions, 4 deletions

diff --git a/mm/slub.c b/mm/slub.c
index 30c4558acc8b..d4b76bea5dba 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2064,9 +2064,6 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
         c = this_cpu_ptr(s->cpu_slab);
 #endif
 
-        /* We handle __GFP_ZERO in the caller */
-        gfpflags &= ~__GFP_ZERO;
-
         page = c->page;
         if (!page)
                 goto new_slab;
@@ -2163,7 +2160,6 @@ debug:
 
         c->freelist = get_freepointer(s, object);
         deactivate_slab(s, c);
-        c->page = NULL;
         c->node = NUMA_NO_NODE;
         local_irq_restore(flags);
         return object;