On 2017.05.10 at 11:24 +1000, Stephen Rothwell wrote:
> Hi Jens,
>
> After merging the block tree, today's linux-next build (arm
> multi_v7_defconfig) produced this warning:
>
> block/elevator.c: In function 'elv_iosched_store':
> block/elevator.c:1102:2: warning: ignoring return value of 'strstrip', declared with attribute warn_unused_result [-Wunused-result]
> strstrip(elevator_name);
> ^
>
> Introduced by commit
>
> d0f6e2da5871 ("block: Remove leading whitespace and trailing newline in elevator switch error message")
Yes, it was missing a (void) like "(void)strlcpy(...)". But Jens
unfortunately removed both warnings, so the following patch should now
be enough:
diff --git a/block/elevator.c b/block/elevator.c
index fda6be933130..dd0ed19e4fb7 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -1099,8 +1099,7 @@ ssize_t elv_iosched_store(struct request_queue *q, const char *name,
return count;
strlcpy(elevator_name, skip_spaces(name), sizeof(elevator_name));
- strstrip(elevator_name);
- ret = __elevator_change(q, elevator_name);
+ ret = __elevator_change(q, strstrip(elevator_name));
if (!ret)
return count;
--
Markus
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