* [PATCH] memcg: add BUILD_BUG_ON() for string tables
@ 2015-01-12 18:54 Greg Thelen
2015-01-12 22:13 ` Johannes Weiner
2015-01-13 8:15 ` Michal Hocko
0 siblings, 2 replies; 3+ messages in thread
From: Greg Thelen @ 2015-01-12 18:54 UTC (permalink / raw)
To: Andrew Morton
Cc: Johannes Weiner, Michal Hocko, linux-mm, linux-kernel, Greg Thelen
Use BUILD_BUG_ON() to compile assert that memcg string tables are in
sync with corresponding enums. There aren't currently any issues with
these tables. This is just defensive.
Signed-off-by: Greg Thelen <gthelen@google.com>
---
mm/memcontrol.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index ef91e856c7e4..8d1ca6c55480 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3699,6 +3699,10 @@ static int memcg_stat_show(struct seq_file *m, void *v)
struct mem_cgroup *mi;
unsigned int i;
+ BUILD_BUG_ON(ARRAY_SIZE(mem_cgroup_stat_names) !=
+ MEM_CGROUP_STAT_NSTATS);
+ BUILD_BUG_ON(ARRAY_SIZE(mem_cgroup_events_names) !=
+ MEM_CGROUP_EVENTS_NSTATS);
BUILD_BUG_ON(ARRAY_SIZE(mem_cgroup_lru_names) != NR_LRU_LISTS);
for (i = 0; i < MEM_CGROUP_STAT_NSTATS; i++) {
--
2.2.0.rc0.207.ga3a616c
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] memcg: add BUILD_BUG_ON() for string tables
2015-01-12 18:54 [PATCH] memcg: add BUILD_BUG_ON() for string tables Greg Thelen
@ 2015-01-12 22:13 ` Johannes Weiner
2015-01-13 8:15 ` Michal Hocko
1 sibling, 0 replies; 3+ messages in thread
From: Johannes Weiner @ 2015-01-12 22:13 UTC (permalink / raw)
To: Greg Thelen; +Cc: Andrew Morton, Michal Hocko, linux-mm, linux-kernel
On Mon, Jan 12, 2015 at 10:54:23AM -0800, Greg Thelen wrote:
> Use BUILD_BUG_ON() to compile assert that memcg string tables are in
> sync with corresponding enums. There aren't currently any issues with
> these tables. This is just defensive.
>
> Signed-off-by: Greg Thelen <gthelen@google.com>
Looks good to me, thanks Greg.
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] memcg: add BUILD_BUG_ON() for string tables
2015-01-12 18:54 [PATCH] memcg: add BUILD_BUG_ON() for string tables Greg Thelen
2015-01-12 22:13 ` Johannes Weiner
@ 2015-01-13 8:15 ` Michal Hocko
1 sibling, 0 replies; 3+ messages in thread
From: Michal Hocko @ 2015-01-13 8:15 UTC (permalink / raw)
To: Greg Thelen; +Cc: Andrew Morton, Johannes Weiner, linux-mm, linux-kernel
On Mon 12-01-15 10:54:23, Greg Thelen wrote:
> Use BUILD_BUG_ON() to compile assert that memcg string tables are in
> sync with corresponding enums. There aren't currently any issues with
> these tables. This is just defensive.
>
> Signed-off-by: Greg Thelen <gthelen@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
> ---
> mm/memcontrol.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index ef91e856c7e4..8d1ca6c55480 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -3699,6 +3699,10 @@ static int memcg_stat_show(struct seq_file *m, void *v)
> struct mem_cgroup *mi;
> unsigned int i;
>
> + BUILD_BUG_ON(ARRAY_SIZE(mem_cgroup_stat_names) !=
> + MEM_CGROUP_STAT_NSTATS);
> + BUILD_BUG_ON(ARRAY_SIZE(mem_cgroup_events_names) !=
> + MEM_CGROUP_EVENTS_NSTATS);
> BUILD_BUG_ON(ARRAY_SIZE(mem_cgroup_lru_names) != NR_LRU_LISTS);
>
> for (i = 0; i < MEM_CGROUP_STAT_NSTATS; i++) {
> --
> 2.2.0.rc0.207.ga3a616c
>
--
Michal Hocko
SUSE Labs
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2015-01-12 22:13 ` Johannes Weiner
2015-01-13 8:15 ` Michal Hocko
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