mm/damon/sysfs: eliminate potential uninitialized variable warning

[ Upstream commit 85c2ceaafbd306814a3a4740bf4d95ac26a8b36a ]

The "err" variable is not initialized if damon_target_has_pid(ctx) is
false and sys_target->regions->nr is zero.

Link: https://lkml.kernel.org/r/739e6aaf-a634-4e33-98a8-16546379ec9f@moroto.mountain
Fixes: 0bcd216c4741 ("mm/damon/sysfs: update monitoring target regions for online input commit")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index faaef50..b317f51 100644 (file)
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -1172,7 +1172,7 @@ static int damon_sysfs_update_target(struct damon_target *target,
                struct damon_ctx *ctx,
                struct damon_sysfs_target *sys_target)
 {
-       int err;
+       int err = 0;
 
        if (damon_target_has_pid(ctx)) {
                err = damon_sysfs_update_target_pid(target, sys_target->pid);