evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

mm: zbud: initialize object to 0 on GFP_ZERO

Browse source 
zbud_alloc if returns free object from pool must also
initialize it to 0 when asked to do so. The same is
already taken care if a fresh object is allocated.

CRs-fixed: 979234
Change-Id: Id171edf131df321385fcdcd7660d06da97689e3e
Signed-off-by: Shiraz Hashim <shashim@codeaurora.org>
This commit is contained in:
Shiraz Hashim 2016-03-03 19:49:41 +05:30 • committed by David Keitel
parent 35bf07444a
commit 1b7778354b
1 changed files with 4 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
mm/zbud.c
View file

@ -357,6 +357,7 @@ int zbud_alloc(struct zbud_pool *pool, size_t size, gfp_t gfp,
struct zbud_header *zhdr = NULL; struct zbud_header *zhdr = NULL;
enum buddy bud; enum buddy bud;
struct page *page; struct page *page;
int found = 0;
if (!size || (gfp & __GFP_HIGHMEM)) if (!size || (gfp & __GFP_HIGHMEM))
return -EINVAL; return -EINVAL;
@ -376,6 +377,7 @@ int zbud_alloc(struct zbud_pool *pool, size_t size, gfp_t gfp,
bud = FIRST; bud = FIRST;
else else
bud = LAST; bud = LAST;
found = 1;
goto found; goto found;
} }
} }
@ -411,6 +413,8 @@ found:
list_add(&zhdr->lru, &pool->lru); list_add(&zhdr->lru, &pool->lru);
*handle = encode_handle(zhdr, bud); *handle = encode_handle(zhdr, bud);
if ((gfp & __GFP_ZERO) && found)
memset((void *)*handle, 0, size);
spin_unlock(&pool->lock); spin_unlock(&pool->lock);
return 0; return 0;