[PATCH 2/3] sched: add a macro to define bitops for task atomic flags

Zefan Li
2014-09-22T03:51:48Z

This will simplify code when we add new flags.

Signed-off-by: Zefan Li <lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
---
include/linux/sched.h | 20 +++++++++++---------
1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4557765..04a2ae2 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1959,15 +1959,17 @@ 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_BITOPS(name, func) \
+static inline bool task_##func(struct task_struct *p) \
+{ return test_bit(PFA_##name, &p->atomic_flags); } \
+ \
+static inline void task_set_##func(struct task_struct *p) \
+{ set_bit(PFA_##name, &p->atomic_flags); } \
+ \
+static inline void task_clear_##func(struct task_struct *p) \
+{ clear_bit(PFA_##name, &p->atomic_flags); }
+
+TASK_PFA_BITOPS(NO_NEW_PRIVS, no_new_privs)

/*
* task->jobctl flags
--
1.8.0.2