Thread (6 messages) 6 messages, 3 authors, 2014-09-22

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

From: Peter Zijlstra <hidden>
Date: 2014-09-22 11:45:46
Also in: lkml

On Mon, Sep 22, 2014 at 11:51:48AM +0800, Zefan Li wrote:
quoted hunk ↗ jump to hunk
This will simplify code when we add new flags.

Signed-off-by: Zefan Li <redacted>
---
 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)
This could really do with a corresponding script/tags.sh update.

	--regex-c++='TASK_PFA_BITOPS\([^,]*,([^)]*)\)/task_\1/'
	--regex-c++='TASK_PFA_BITOPS\([^,]*,([^)]*)\)/task_set_\1/'
	--regex-c++='TASK_PFA_BITOPS\([^,]*,([^)]*)\)/task_clear_\1/'

For exhuberant and matching bits for emacs.
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help