mm/damon/sysfs: use the wrapper directly to check if the kdamond is running

We can use the 'damon_sysfs_kdamond_running()' wrapper directly to check
if the kdamond is running in 'damon_sysfs_turn_damon_on()'.

Link: https://lkml.kernel.org/r/1662995513-24489-1-git-send-email-kaixuxia@tencent.com
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index d27dad5..da01bef 100644 (file)
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -2465,8 +2465,7 @@ static int damon_sysfs_turn_damon_on(struct damon_sysfs_kdamond *kdamond)
        struct damon_ctx *ctx;
        int err;
 
-       if (kdamond->damon_ctx &&
-                       damon_sysfs_ctx_running(kdamond->damon_ctx))
+       if (damon_sysfs_kdamond_running(kdamond))
                return -EBUSY;
        if (damon_sysfs_cmd_request.kdamond == kdamond)
                return -EBUSY;