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mm/vmpressure.c: convert to use match_string() helper

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The new helper returns index of the matching string in an array.  We are
going to use it here.

Link: http://lkml.kernel.org/r/20180503203206.44046-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: David Rientjes <rientjes@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:
Andy Shevchenko 2018-06-07 17:07:53 -07:00 committed by Linus Torvalds
parent d62ff365b8
commit 3cadfa2b94
1 changed files with 6 additions and 26 deletions
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32
mm/vmpressure.c
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@ -342,26 +342,6 @@ void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio)
vmpressure(gfp, memcg, true, vmpressure_win, 0);
}
static enum vmpressure_levels str_to_level(const char *arg)
{
enum vmpressure_levels level;
for (level = 0; level < VMPRESSURE_NUM_LEVELS; level++)
if (!strcmp(vmpressure_str_levels[level], arg))
return level;
return -1;
}
static enum vmpressure_modes str_to_mode(const char *arg)
{
enum vmpressure_modes mode;
for (mode = 0; mode < VMPRESSURE_NUM_MODES; mode++)
if (!strcmp(vmpressure_str_modes[mode], arg))
return mode;
return -1;
}
#define MAX_VMPRESSURE_ARGS_LEN (strlen("critical") + strlen("hierarchy") + 2)
/**
@ -398,18 +378,18 @@ int vmpressure_register_event(struct mem_cgroup *memcg,
/* Find required level */
token = strsep(&spec, ",");
level = str_to_level(token);
if (level == -1) {
ret = -EINVAL;
level = match_string(vmpressure_str_levels, VMPRESSURE_NUM_LEVELS, token);
if (level < 0) {
ret = level;
goto out;
}
/* Find optional mode */
token = strsep(&spec, ",");
if (token) {
mode = str_to_mode(token);
if (mode == -1) {
ret = -EINVAL;
mode = match_string(vmpressure_str_modes, VMPRESSURE_NUM_MODES, token);
if (mode < 0) {
ret = mode;
goto out;
}
}