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mm: memcontrol: use int for event/state parameter in several functions

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Several functions use an enum type as parameter for an event/state, but
are called in some locations with an argument of a different enum type.
Adjust the interface of these functions to reality by changing the
parameter to int.

This fixes a ton of enum-conversion warnings that are generated when
building the kernel with clang.

[mka@chromium.org: also change parameter type of inc/dec/mod_memcg_page_state()]
  Link: http://lkml.kernel.org/r/20170728213442.93823-1-mka@chromium.org
Link: http://lkml.kernel.org/r/20170727211004.34435-1-mka@chromium.org
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Doug Anderson <dianders@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthias Kaehlcke 2017-09-06 16:22:09 -07:00 committed by Linus Torvalds
parent 67e5ed9699
commit 04fecbf51b
2 changed files with 35 additions and 21 deletions
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52
include/linux/memcontrol.h
View file

@ -488,8 +488,9 @@ struct mem_cgroup *lock_page_memcg(struct page *page);
void __unlock_page_memcg(struct mem_cgroup *memcg);
void unlock_page_memcg(struct page *page);
/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline unsigned long memcg_page_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
int idx)
{
long val = 0;
int cpu;
@ -503,15 +504,17 @@ static inline unsigned long memcg_page_state(struct mem_cgroup *memcg,
return val;
}
/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline void __mod_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx, int val)
int idx, int val)
{
if (!mem_cgroup_disabled())
__this_cpu_add(memcg->stat->count[idx], val);
}
/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline void mod_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx, int val)
int idx, int val)
{
if (!mem_cgroup_disabled())
this_cpu_add(memcg->stat->count[idx], val);
@ -535,14 +538,14 @@ static inline void mod_memcg_state(struct mem_cgroup *memcg,
* Kernel pages are an exception to this, since they'll never move.
*/
static inline void __mod_memcg_page_state(struct page *page,
enum memcg_stat_item idx, int val)
int idx, int val)
{
if (page->mem_cgroup)
__mod_memcg_state(page->mem_cgroup, idx, val);
}
static inline void mod_memcg_page_state(struct page *page,
enum memcg_stat_item idx, int val)
int idx, int val)
{
if (page->mem_cgroup)
mod_memcg_state(page->mem_cgroup, idx, val);
@ -632,8 +635,9 @@ static inline void count_memcg_events(struct mem_cgroup *memcg,
this_cpu_add(memcg->stat->events[idx], count);
}
/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline void count_memcg_page_event(struct page *page,
enum memcg_stat_item idx)
int idx)
{
if (page->mem_cgroup)
count_memcg_events(page->mem_cgroup, idx, 1);
@ -846,31 +850,31 @@ static inline bool mem_cgroup_oom_synchronize(bool wait)
}
static inline unsigned long memcg_page_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
int idx)
{
return 0;
}
static inline void __mod_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx,
int idx,
int nr)
{
}
static inline void mod_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx,
int idx,
int nr)
{
}
static inline void __mod_memcg_page_state(struct page *page,
enum memcg_stat_item idx,
int idx,
int nr)
{
}
static inline void mod_memcg_page_state(struct page *page,
enum memcg_stat_item idx,
int idx,
int nr)
{
}
@ -924,7 +928,7 @@ static inline void count_memcg_events(struct mem_cgroup *memcg,
}
static inline void count_memcg_page_event(struct page *page,
enum memcg_stat_item idx)
int idx)
{
}
@ -934,26 +938,30 @@ void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx)
}
#endif /* CONFIG_MEMCG */
/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline void __inc_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
int idx)
{
__mod_memcg_state(memcg, idx, 1);
}
/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline void __dec_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
int idx)
{
__mod_memcg_state(memcg, idx, -1);
}
/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline void __inc_memcg_page_state(struct page *page,
enum memcg_stat_item idx)
int idx)
{
__mod_memcg_page_state(page, idx, 1);
}
/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline void __dec_memcg_page_state(struct page *page,
enum memcg_stat_item idx)
int idx)
{
__mod_memcg_page_state(page, idx, -1);
}
@ -982,26 +990,30 @@ static inline void __dec_lruvec_page_state(struct page *page,
__mod_lruvec_page_state(page, idx, -1);
}
/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline void inc_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
int idx)
{
mod_memcg_state(memcg, idx, 1);
}
/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline void dec_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
int idx)
{
mod_memcg_state(memcg, idx, -1);
}
/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline void inc_memcg_page_state(struct page *page,
enum memcg_stat_item idx)
int idx)
{
mod_memcg_page_state(page, idx, 1);
}
/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline void dec_memcg_page_state(struct page *page,
enum memcg_stat_item idx)
int idx)
{
mod_memcg_page_state(page, idx, -1);
}

4
mm/memcontrol.c
View file

@ -550,10 +550,12 @@ mem_cgroup_largest_soft_limit_node(struct mem_cgroup_tree_per_node *mctz)
* value, and reading all cpu value can be performance bottleneck in some
* common workload, threshold and synchronization as vmstat[] should be
* implemented.
*
* The parameter idx can be of type enum memcg_event_item or vm_event_item.
*/
static unsigned long memcg_sum_events(struct mem_cgroup *memcg,
enum memcg_event_item event)
int event)
{
unsigned long val = 0;
int cpu;