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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2018-06-07 17:07:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-07 17:34:36 -0700
commit3cadfa2b9497abbd3ae11a790d53ed51b4cf8ac5 (patch)
tree1a88684580fbdd667e08364d0421cb57ff5299e1 /mm
parentd62ff365b812ecd7415252568c1836811b3dde02 (diff)
mm/vmpressure.c: convert to use match_string() helper
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>
Diffstat (limited to 'mm')
-rw-r--r--mm/vmpressure.c32
1 files changed, 6 insertions, 26 deletions
diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index 7142207224d3..4854584ec436 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -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;
}
}