On Thu, May 31, 2018 at 2:11 PM, Yisheng Xie <xieyishe...@huawei.com> wrote:
> match_string() returns the index of an array for a matching string,
> which can be used instead of open coded variant.
>
FWIW,
Reviewed-by: Andy Shevchenko <andy.shevche...@gmail.com>
> Cc: Ingo Molnar <mi...@redhat.com>
> Cc: Peter Zijlstra <pet...@infradead.org>
> Signed-off-by: Yisheng Xie <xieyishe...@huawei.com>
> ---
> v2:
> - rename i to ret to show the change in returned value meaning - per Andy
>
> kernel/sched/debug.c | 31 +++++++++++++++----------------
> 1 file changed, 15 insertions(+), 16 deletions(-)
>
> diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
> index 15b10e2..5591147 100644
> --- a/kernel/sched/debug.c
> +++ b/kernel/sched/debug.c
> @@ -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 @@ static int sched_feat_set(char *cmp)
> {
> char buf[64];
> char *cmp;
> - int i;
> + int ret;
> struct inode *inode;
>
> if (cnt > 63)
> @@ -148,10 +147,10 @@ static int sched_feat_set(char *cmp)
> /* 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;
>
> --
> 1.7.12.4
>
--
With Best Regards,
Andy Shevchenko
