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| author | Zefan Li <lizefan@huawei.com> | 2014-09-25 05:40:40 +0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-10-12 17:27:22 +0300 |
| commit | 4fce5e64991fc0a02e47e525ce72f33def17b7ef (patch) | |
| tree | c8c9e245a24954f1b41e8dbb14c600b2e58a5881 | |
| parent | 7b73b4b97fc6d0c37c76baee966ea9b9a6323a72 (diff) | |
| download | linux-4fce5e64991fc0a02e47e525ce72f33def17b7ef.tar.xz | |
sched: add macros to define bitops for task atomic flags
commit e0e5070b20e01f0321f97db4e4e174f3f6b49e50 upstream.
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>
[lizf: Backported to 3.4:
- adjust context
- remove no_new_priv code
- add atomic_flags to struct task_struct]
[bwh: Backported to 3.2:
- Drop changes in scripts/tags.sh
- Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | include/linux/sched.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index fb76ee7dbd9d..a0ec63408371 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1313,6 +1313,8 @@ struct task_struct { unsigned sched_reset_on_fork:1; unsigned sched_contributes_to_load:1; + unsigned long atomic_flags; /* Flags needing atomic access. */ + pid_t pid; pid_t tgid; @@ -1844,6 +1846,18 @@ extern void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t * #define tsk_used_math(p) ((p)->flags & PF_USED_MATH) #define used_math() tsk_used_math(current) +/* Per-process 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->jobctl flags */ |