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| author | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-05-21 23:03:15 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-05-21 23:03:15 -0300 |
| commit | e899966f626f1f657a4a7bac736c0b9ae5a243ea (patch) | |
| tree | a4bb8362d871da67b41fee27bb85ad0bc83e0591 /include/linux/cgroup.h | |
| parent | ba0d342ecc21fbbe2f6c178f4479944d1fb34f3b (diff) | |
| parent | 4b660a7f5c8099d88d1a43d8ae138965112592c7 (diff) | |
Merge tag 'v3.15-rc6' into patchwork
Linux 3.15-rc6
* tag 'v3.15-rc6': (1314 commits)
Linux 3.15-rc6
Btrfs: send, fix incorrect ref access when using extrefs
Btrfs: fix EIO on reading file after ioctl clone works on it
scripts/checksyscalls.sh: Make renameat optional
asm-generic: Add renameat2 syscall
ia64: add renameat2 syscall
parisc: add renameat2 syscall
m68k: add renameat2 syscall
sysfs: make sure read buffer is zeroed
ahci: imx: PLL clock needs 100us to settle down
PCI: Wrong register used to check pending traffic
target: fix memory leak on XCOPY
random: fix BUG_ON caused by accounting simplification
clk: tegra: Fix wrong value written to PLLE_AUX
staging: rtl8723au: Do not reset wdev->iftype in netdev_close()
ACPI / video: Revert native brightness quirk for ThinkPad T530
staging: rtl8723au: Use correct pipe type for USB interrupts
crush: decode and initialize chooseleaf_vary_r
libceph: fix corruption when using page_count 0 page in rbd
arm64: fix pud_huge() for 2-level pagetables
...
Diffstat (limited to 'include/linux/cgroup.h')
| -rw-r--r-- | include/linux/cgroup.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index c2515851c1a..d60904b9e50 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -473,6 +473,7 @@ struct cftype { }; extern struct cgroup_root cgrp_dfl_root; +extern struct css_set init_css_set; static inline bool cgroup_on_dfl(const struct cgroup *cgrp) { @@ -700,6 +701,20 @@ static inline struct cgroup_subsys_state *task_css(struct task_struct *task, return task_css_check(task, subsys_id, false); } +/** + * task_css_is_root - test whether a task belongs to the root css + * @task: the target task + * @subsys_id: the target subsystem ID + * + * Test whether @task belongs to the root css on the specified subsystem. + * May be invoked in any context. + */ +static inline bool task_css_is_root(struct task_struct *task, int subsys_id) +{ + return task_css_check(task, subsys_id, true) == + init_css_set.subsys[subsys_id]; +} + static inline struct cgroup *task_cgroup(struct task_struct *task, int subsys_id) { |