c274cd5c9b
It is unnecessary to get the number of the running kdamond to judge whether kdamonds are busy. Here we can use the damon_sysfs_kdamond_running() helper and return -EBUSY directly when finding a running kdamond. Meanwhile, merging with the judgement that a kdamond has current sysfs command callback request to make the code more clear. Link: https://lkml.kernel.org/r/1662302166-13216-1-git-send-email-kaixuxia@tencent.com Signed-off-by: Kaixu Xia <kaixuxia@tencent.com> Reviewed-by: SeongJae Park <sj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>