From: Wei Yang <richard.weiyang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
lizefan.x-EC8Uxl6Npydl57MIdRCFDg@public.gmane.org,
hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org
Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Wei Yang
<richard.weiyang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: [PATCH 1/4] cgroup: a u16 is enough for cgroup_subsys.depends_on
Date: Mon, 4 Oct 2021 08:49:25 +0000 [thread overview]
Message-ID: <20211004084928.17622-1-richard.weiyang@gmail.com> (raw)
After commit 6e5c830770f9 ("cgroup: make cgroup subsystem masks u16"),
we limit the number of subsystem to be less then 16. This applies to
cgroup_subsys.depends_on too.
Signed-off-by: Wei Yang <richard.weiyang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
include/linux/cgroup-defs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
index db2e147e069f..f6d80896daab 100644
--- a/include/linux/cgroup-defs.h
+++ b/include/linux/cgroup-defs.h
@@ -705,7 +705,7 @@ struct cgroup_subsys {
* not visible to userland until explicitly enabled. The following
* specifies the mask of subsystems that this one depends on.
*/
- unsigned int depends_on;
+ u16 depends_on;
};
extern struct percpu_rw_semaphore cgroup_threadgroup_rwsem;
--
2.23.0
next reply other threads:[~2021-10-04 8:49 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-04 8:49 Wei Yang [this message]
[not found] ` <20211004084928.17622-1-richard.weiyang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2021-10-04 8:49 ` [PATCH 2/4] cgroup: reorder cgroup_subsys fields to save 8 byte Wei Yang
2021-10-04 8:49 ` [PATCH 3/4] cgroup: simplify the cgroup descendant helper Wei Yang
2021-10-04 8:49 ` [PATCH 4/4] cgroup: use parent directly instead of cgroup_parent() Wei Yang
2021-10-04 16:30 ` [PATCH 1/4] cgroup: a u16 is enough for cgroup_subsys.depends_on Tejun Heo
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