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mm/mempolicy.c: use match_string() helper to simplify the code 

match_string() returns the index of an array for a matching string, which
can be used intead of open coded implementation.

Link: http://lkml.kernel.org/r/1536988365-50310-1-git-send-email-zhongjiang@huawei.com
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
zhong jiang 2018-10-26 15:06:57 -07:00 committed by Linus Torvalds
parent c3df29d130
commit dedf2c73b8
1 changed files with 3 additions and 8 deletions
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11
mm/mempolicy.c
View File

@ -2711,12 +2711,11 @@ static const char * const policy_modes[] =
int mpol_parse_str(char *str, struct mempolicy **mpol) int mpol_parse_str(char *str, struct mempolicy **mpol)
{ {
struct mempolicy *new = NULL; struct mempolicy *new = NULL;
unsigned short mode;
unsigned short mode_flags; unsigned short mode_flags;
nodemask_t nodes; nodemask_t nodes;
char *nodelist = strchr(str, ':'); char *nodelist = strchr(str, ':');
char *flags = strchr(str, '='); char *flags = strchr(str, '=');
int err = 1; int err = 1, mode;
if (nodelist) { if (nodelist) {
/* NUL-terminate mode or flags string */ /* NUL-terminate mode or flags string */
@ -2731,12 +2730,8 @@ int mpol_parse_str(char *str, struct mempolicy **mpol)
if (flags) if (flags)
*flags++ = '\0'; /* terminate mode string */ *flags++ = '\0'; /* terminate mode string */
for (mode = 0; mode < MPOL_MAX; mode++) { mode = match_string(policy_modes, MPOL_MAX, str);
if (!strcmp(str, policy_modes[mode])) { if (mode < 0)
break;
}
}
if (mode >= MPOL_MAX)
goto out; goto out;
switch (mode) { switch (mode) {