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Message-Id: <20170728213442.93823-1-mka@chromium.org>
Date: Fri, 28 Jul 2017 14:34:42 -0700
From: Matthias Kaehlcke <mka@...omium.org>
To: Johannes Weiner <hannes@...xchg.org>,
Michal Hocko <mhocko@...nel.org>,
Vladimir Davydov <vdavydov.dev@...il.com>,
Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
linux-mm@...ck.org, Doug Anderson <dianders@...omium.org>,
Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH v2] 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.
Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
---
Changes in v2:
- also change parameter type of inc/dec/mod_memcg_page_state()
include/linux/memcontrol.h | 52 ++++++++++++++++++++++++++++------------------
mm/memcontrol.c | 4 +++-
2 files changed, 35 insertions(+), 21 deletions(-)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 3914e3dd6168..8556f1b86d40 100644
--- a/include/linux/memcontrol.h
+++ b/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_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);
@@ -534,14 +537,14 @@ 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);
@@ -631,8 +634,9 @@ 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);
@@ -840,31 +844,31 @@ 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)
{
}
@@ -918,7 +922,7 @@ 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)
{
}
@@ -928,26 +932,30 @@ 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);
}
@@ -976,26 +984,30 @@ 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);
}
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 3df3c04d73ab..460130d2a796 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -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;
--
2.14.0.rc0.400.g1c36432dff-goog
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