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>
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@ -342,26 +342,6 @@ void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio)
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vmpressure(gfp, memcg, true, vmpressure_win, 0);
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}
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static enum vmpressure_levels str_to_level(const char *arg)
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{
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enum vmpressure_levels level;
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for (level = 0; level < VMPRESSURE_NUM_LEVELS; level++)
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if (!strcmp(vmpressure_str_levels[level], arg))
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return level;
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return -1;
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}
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static enum vmpressure_modes str_to_mode(const char *arg)
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{
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enum vmpressure_modes mode;
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for (mode = 0; mode < VMPRESSURE_NUM_MODES; mode++)
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if (!strcmp(vmpressure_str_modes[mode], arg))
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return mode;
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return -1;
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}
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#define MAX_VMPRESSURE_ARGS_LEN (strlen("critical") + strlen("hierarchy") + 2)
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/**
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@ -398,18 +378,18 @@ int vmpressure_register_event(struct mem_cgroup *memcg,
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/* Find required level */
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token = strsep(&spec, ",");
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level = str_to_level(token);
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if (level == -1) {
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ret = -EINVAL;
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level = match_string(vmpressure_str_levels, VMPRESSURE_NUM_LEVELS, token);
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if (level < 0) {
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ret = level;
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goto out;
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}
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/* Find optional mode */
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token = strsep(&spec, ",");
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if (token) {
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mode = str_to_mode(token);
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if (mode == -1) {
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ret = -EINVAL;
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mode = match_string(vmpressure_str_modes, VMPRESSURE_NUM_MODES, token);
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if (mode < 0) {
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ret = mode;
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goto out;
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}
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}
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