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cgroup: compare css to cgroup::self in helper for distingushing css

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Adjust the implementation of css_is_cgroup() so that it compares the given
css to cgroup::self. Rename the function to css_is_self() in order to
reflect that. Change the existing css->ss NULL check to a warning in the
true branch. Finally, adjust call sites to use the new function name.

Signed-off-by: JP Kobryn <inwardvessel@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
JP Kobryn
2025-05-14 17:19:33 -07:00
committed by Tejun Heo
parent b2713a5ad3
commit 541a4219bd
2 changed files with 12 additions and 6 deletions
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10
include/linux/cgroup.h
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@@ -347,9 +347,15 @@ static inline bool css_is_dying(struct cgroup_subsys_state *css)
return css->flags & CSS_DYING;
}
static inline bool css_is_cgroup(struct cgroup_subsys_state *css)
static inline bool css_is_self(struct cgroup_subsys_state *css)
{
return css->ss == NULL;
if (css == &css->cgroup->self) {
/* cgroup::self should not have subsystem association */
WARN_ON(css->ss != NULL);
return true;
}
return false;
}
static inline void cgroup_get(struct cgroup *cgrp)