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| author | Aleksa Sarai <cyphar@cyphar.com> | 2015-06-06 10:02:14 +1000 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-06-07 22:52:11 -0400 |
| commit | 4bb916c171fa2dd59d6c215c5be4b511ad21cf0b (patch) | |
| tree | d67a17014e6500352c50528a56737ff3587837ec /include/linux | |
| parent | 034dd596324d53e0d7dd9a7a3f3290e6982eb1b4 (diff) | |
cgroup: use bitmask to filter for_each_subsys
[ Upstream commit cb4a316752709be4a644f070440a8be470d92b7d ]
Add a new macro for_each_subsys_which that allows all enabled cgroup
subsystems to be filtered by a bitmask, such that mask & (1 << ssid)
determines if the subsystem is to be processed in the loop body (where
ssid is the unique id of the subsystem).
Also replace the need_forkexit_callback with two separate bitmasks for
each callback to make (ss->{fork,exit}) checks unnecessary.
tj: add a short comment for "if (!CGROUP_SUBSYS_COUNT)".
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/cgroup-defs.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h index 7c40e75a49ea..9c33ea5ec4cb 100644 --- a/include/linux/cgroup-defs.h +++ b/include/linux/cgroup-defs.h @@ -472,6 +472,8 @@ void cgroup_threadgroup_change_end(struct task_struct *tsk); #else /* CONFIG_CGROUPS */ +#define CGROUP_SUBSYS_COUNT 0 + static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk) {} static inline void cgroup_threadgroup_change_end(struct task_struct *tsk) {} |