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authorJohannes Weiner <hannes@cmpxchg.org>2015-11-05 18:50:26 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-05 19:34:48 -0800
commit6071ca5201066f4b2a61cfb693dd186d6bc6e9f3 (patch)
tree2ec2fa58fc43986025267568feb96c7b86a2722c /mm/memcontrol.c
parentf5fc3c5d817435970aa301d066820a9ac12c8120 (diff)
downloadlwn-6071ca5201066f4b2a61cfb693dd186d6bc6e9f3.tar.gz
lwn-6071ca5201066f4b2a61cfb693dd186d6bc6e9f3.zip
mm: page_counter: let page_counter_try_charge() return bool
page_counter_try_charge() currently returns 0 on success and -ENOMEM on failure, which is surprising behavior given the function name. Make it follow the expected pattern of try_stuff() functions that return a boolean true to indicate success, or false for failure. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Vladimir Davydov <vdavydov@virtuozzo.com Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 59b100fde35f..d47de73d7c36 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2016,8 +2016,8 @@ retry:
return 0;
if (!do_swap_account ||
- !page_counter_try_charge(&memcg->memsw, batch, &counter)) {
- if (!page_counter_try_charge(&memcg->memory, batch, &counter))
+ page_counter_try_charge(&memcg->memsw, batch, &counter)) {
+ if (page_counter_try_charge(&memcg->memory, batch, &counter))
goto done_restock;
if (do_swap_account)
page_counter_uncharge(&memcg->memsw, batch);
@@ -2381,14 +2381,13 @@ int __memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order,
{
unsigned int nr_pages = 1 << order;
struct page_counter *counter;
- int ret = 0;
+ int ret;
if (!memcg_kmem_is_active(memcg))
return 0;
- ret = page_counter_try_charge(&memcg->kmem, nr_pages, &counter);
- if (ret)
- return ret;
+ if (!page_counter_try_charge(&memcg->kmem, nr_pages, &counter))
+ return -ENOMEM;
ret = try_charge(memcg, gfp, nr_pages);
if (ret) {