The patch titled
Subject: mm: memcontrol: use int for event/state parameter in several functions
has been added to the -mm tree. Its filename is
mm-memcontrol-use-int-for-event-state-parameter-in-several-functions.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-use-int-for-event-state-parameter-in-several-functions.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-use-int-for-event-state-parameter-in-several-functions.patch
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------------------------------------------------------
From: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
Subject: mm: memcontrol: use int for event/state parameter in several functions
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.
Link: http://lkml.kernel.org/r/20170727211004.34435-1-mka@xxxxxxxxxxxx
Signed-off-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Cc: Doug Anderson <dianders@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memcontrol.h | 20 ++++++++++++--------
mm/memcontrol.c | 4 +++-
2 files changed, 15 insertions(+), 9 deletions(-)
diff -puN include/linux/memcontrol.h~mm-memcontrol-use-int-for-event-state-parameter-in-several-functions include/linux/memcontrol.h
--- a/include/linux/memcontrol.h~mm-memcontrol-use-int-for-event-state-parameter-in-several-functions
+++ a/include/linux/memcontrol.h
@@ -487,8 +487,9 @@ extern int do_swap_account;
void lock_page_memcg(struct page *page);
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;
@@ -502,15 +503,17 @@ static inline unsigned long memcg_page_s
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);
@@ -631,8 +634,9 @@ static inline void count_memcg_events(st
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);
@@ -840,19 +844,19 @@ static inline bool mem_cgroup_oom_synchr
}
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)
{
}
@@ -918,7 +922,7 @@ static inline void count_memcg_events(st
}
static inline void count_memcg_page_event(struct page *page,
- enum memcg_stat_item idx)
+ int idx)
{
}
diff -puN mm/memcontrol.c~mm-memcontrol-use-int-for-event-state-parameter-in-several-functions mm/memcontrol.c
--- a/mm/memcontrol.c~mm-memcontrol-use-int-for-event-state-parameter-in-several-functions
+++ a/mm/memcontrol.c
@@ -550,10 +550,12 @@ mem_cgroup_largest_soft_limit_node(struc
* 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;
_
Patches currently in -mm which might be from mka@xxxxxxxxxxxx are
mm-memcontrol-use-int-for-event-state-parameter-in-several-functions.patch
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