diff options
| author | Dave Martin <Dave.Martin@arm.com> | 2018-04-11 17:54:20 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-05-25 12:27:53 +0100 |
| commit | 93ee37c2a6a97e5d358af2d8f0510817b6e75679 (patch) | |
| tree | 25ac1eba47eb4b98989c766bc3ea7383cc5e933a | |
| parent | d8ad71fa38a96128ebb0462539fee6cb9391d17b (diff) | |
| download | linux-93ee37c2a6a97e5d358af2d8f0510817b6e75679.tar.bz2 | |
thread_info: Add update_thread_flag() helpers
There are a number of bits of code sprinkled around the kernel to
set a thread flag if a certain condition is true, and clear it
otherwise.
To help make those call sites terser and less cumbersome, this
patch adds a new family of thread flag manipulators
update*_thread_flag([...,] flag, cond)
which do the equivalent of:
if (cond)
set*_thread_flag([...,] flag);
else
clear*_thread_flag([...,] flag);
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
| -rw-r--r-- | include/linux/sched.h | 6 | ||||
| -rw-r--r-- | include/linux/thread_info.h | 11 |
2 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index b3d697f3b573..c2c305199721 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1578,6 +1578,12 @@ static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag) clear_ti_thread_flag(task_thread_info(tsk), flag); } +static inline void update_tsk_thread_flag(struct task_struct *tsk, int flag, + bool value) +{ + update_ti_thread_flag(task_thread_info(tsk), flag, value); +} + static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag) { return test_and_set_ti_thread_flag(task_thread_info(tsk), flag); diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h index cf2862bd134a..8d8821b3689a 100644 --- a/include/linux/thread_info.h +++ b/include/linux/thread_info.h @@ -60,6 +60,15 @@ static inline void clear_ti_thread_flag(struct thread_info *ti, int flag) clear_bit(flag, (unsigned long *)&ti->flags); } +static inline void update_ti_thread_flag(struct thread_info *ti, int flag, + bool value) +{ + if (value) + set_ti_thread_flag(ti, flag); + else + clear_ti_thread_flag(ti, flag); +} + static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag) { return test_and_set_bit(flag, (unsigned long *)&ti->flags); @@ -79,6 +88,8 @@ static inline int test_ti_thread_flag(struct thread_info *ti, int flag) set_ti_thread_flag(current_thread_info(), flag) #define clear_thread_flag(flag) \ clear_ti_thread_flag(current_thread_info(), flag) +#define update_thread_flag(flag, value) \ + update_ti_thread_flag(current_thread_info(), flag, value) #define test_and_set_thread_flag(flag) \ test_and_set_ti_thread_flag(current_thread_info(), flag) #define test_and_clear_thread_flag(flag) \ |