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sched/debug: Use match_string() helper instead of open-coded logic

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

Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/lkml/1527765086-19873-15-git-send-email-xieyisheng1@huawei.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Yisheng Xie 2018-05-31 19:11:19 +08:00 committed by Ingo Molnar
parent b3dae109fa
commit 8f894bf47d
1 changed files with 15 additions and 16 deletions
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31
kernel/sched/debug.c
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@ -111,20 +111,19 @@ static int sched_feat_set(char *cmp)
cmp += 3;
}
for (i = 0; i < __SCHED_FEAT_NR; i++) {
if (strcmp(cmp, sched_feat_names[i]) == 0) {
if (neg) {
sysctl_sched_features &= ~(1UL << i);
sched_feat_disable(i);
} else {
sysctl_sched_features |= (1UL << i);
sched_feat_enable(i);
}
break;
}
i = match_string(sched_feat_names, __SCHED_FEAT_NR, cmp);
if (i < 0)
return i;
if (neg) {
sysctl_sched_features &= ~(1UL << i);
sched_feat_disable(i);
} else {
sysctl_sched_features |= (1UL << i);
sched_feat_enable(i);
}
return i;
return 0;
}
static ssize_t
@ -133,7 +132,7 @@ sched_feat_write(struct file *filp, const char __user *ubuf,
{
char buf[64];
char *cmp;
int i;
int ret;
struct inode *inode;
if (cnt > 63)
@ -148,10 +147,10 @@ sched_feat_write(struct file *filp, const char __user *ubuf,
/* Ensure the static_key remains in a consistent state */
inode = file_inode(filp);
inode_lock(inode);
i = sched_feat_set(cmp);
ret = sched_feat_set(cmp);
inode_unlock(inode);
if (i == __SCHED_FEAT_NR)
return -EINVAL;
if (ret < 0)
return ret;
*ppos += cnt;