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authorZefan Li <lizefan@huawei.com>2014-09-25 09:40:40 +0800
committerTejun Heo <tj@kernel.org>2014-09-24 22:16:06 -0400
commite0e5070b20e01f0321f97db4e4e174f3f6b49e50 (patch)
tree4135aa645ae2bc041d72fcfd5e64f6544a0791f4 /include
parenta2b86f772227bcaf962c8b134f8d187046ac5f0e (diff)
downloadlinux-linaro-stable-e0e5070b20e01f0321f97db4e4e174f3f6b49e50.tar.gz
sched: add macros to define bitops for task atomic flags
This will simplify code when we add new flags. v3: - Kees pointed out that no_new_privs should never be cleared, so we shouldn't define task_clear_no_new_privs(). we define 3 macros instead of a single one. v2: - updated scripts/tags.sh, suggested by Peter Cc: Ingo Molnar <mingo@kernel.org> Cc: Miao Xie <miaox@cn.fujitsu.com> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Zefan Li <lizefan@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/sched.h21
1 files changed, 12 insertions, 9 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 45577650f629..5630763956d9 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1959,15 +1959,18 @@ static inline void memalloc_noio_restore(unsigned int flags)
/* Per-process atomic flags. */
#define PFA_NO_NEW_PRIVS 0 /* May not gain new privileges. */
-static inline bool task_no_new_privs(struct task_struct *p)
-{
- return test_bit(PFA_NO_NEW_PRIVS, &p->atomic_flags);
-}
-
-static inline void task_set_no_new_privs(struct task_struct *p)
-{
- set_bit(PFA_NO_NEW_PRIVS, &p->atomic_flags);
-}
+#define TASK_PFA_TEST(name, func) \
+ static inline bool task_##func(struct task_struct *p) \
+ { return test_bit(PFA_##name, &p->atomic_flags); }
+#define TASK_PFA_SET(name, func) \
+ static inline void task_set_##func(struct task_struct *p) \
+ { set_bit(PFA_##name, &p->atomic_flags); }
+#define TASK_PFA_CLEAR(name, func) \
+ static inline void task_clear_##func(struct task_struct *p) \
+ { clear_bit(PFA_##name, &p->atomic_flags); }
+
+TASK_PFA_TEST(NO_NEW_PRIVS, no_new_privs)
+TASK_PFA_SET(NO_NEW_PRIVS, no_new_privs)
/*
* task->jobctl flags