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memcg: change defines to an enum

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This is just a cleanup patch for clarity of expression.  In earlier
submissions, people asked it to be in a separate patch, so here it is.

Signed-off-by: Glauber Costa <glommer@parallels.com>
Acked-by: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Frederic Weisbecker <fweisbec@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: JoonSoo Kim <js1304@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Glauber Costa 2012-12-18 14:21:45 -08:00 committed by Linus Torvalds
parent 4c9c535968
commit 86ae53e1a1
1 changed files with 16 additions and 10 deletions
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26
mm/memcontrol.c
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@ -388,9 +388,12 @@ enum charge_type {
};
/* for encoding cft->private value on file */
#define _MEM (0)
#define _MEMSWAP (1)
#define _OOM_TYPE (2)
enum res_type {
_MEM,
_MEMSWAP,
_OOM_TYPE,
};
#define MEMFILE_PRIVATE(x, val) ((x) << 16 | (val))
#define MEMFILE_TYPE(val) ((val) >> 16 & 0xffff)
#define MEMFILE_ATTR(val) ((val) & 0xffff)
@ -3952,7 +3955,8 @@ static ssize_t mem_cgroup_read(struct cgroup *cont, struct cftype *cft,
struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
char str[64];
u64 val;
int type, name, len;
int name, len;
enum res_type type;
type = MEMFILE_TYPE(cft->private);
name = MEMFILE_ATTR(cft->private);
@ -3988,7 +3992,8 @@ static int mem_cgroup_write(struct cgroup *cont, struct cftype *cft,
const char *buffer)
{
struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
int type, name;
enum res_type type;
int name;
unsigned long long val;
int ret;
@ -4064,7 +4069,8 @@ out:
static int mem_cgroup_reset(struct cgroup *cont, unsigned int event)
{
struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
int type, name;
int name;
enum res_type type;
type = MEMFILE_TYPE(event);
name = MEMFILE_ATTR(event);
@ -4400,7 +4406,7 @@ static int mem_cgroup_usage_register_event(struct cgroup *cgrp,
struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
struct mem_cgroup_thresholds *thresholds;
struct mem_cgroup_threshold_ary *new;
int type = MEMFILE_TYPE(cft->private);
enum res_type type = MEMFILE_TYPE(cft->private);
u64 threshold, usage;
int i, size, ret;
@ -4483,7 +4489,7 @@ static void mem_cgroup_usage_unregister_event(struct cgroup *cgrp,
struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
struct mem_cgroup_thresholds *thresholds;
struct mem_cgroup_threshold_ary *new;
int type = MEMFILE_TYPE(cft->private);
enum res_type type = MEMFILE_TYPE(cft->private);
u64 usage;
int i, j, size;
@ -4561,7 +4567,7 @@ static int mem_cgroup_oom_register_event(struct cgroup *cgrp,
{
struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
struct mem_cgroup_eventfd_list *event;
int type = MEMFILE_TYPE(cft->private);
enum res_type type = MEMFILE_TYPE(cft->private);
BUG_ON(type != _OOM_TYPE);
event = kmalloc(sizeof(*event), GFP_KERNEL);
@ -4586,7 +4592,7 @@ static void mem_cgroup_oom_unregister_event(struct cgroup *cgrp,
{
struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
struct mem_cgroup_eventfd_list *ev, *tmp;
int type = MEMFILE_TYPE(cft->private);
enum res_type type = MEMFILE_TYPE(cft->private);
BUG_ON(type != _OOM_TYPE);