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| author | Ingo Molnar <mingo@kernel.org> | 2017-02-05 17:30:50 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-03-03 03:45:26 +0300 |
| commit | cda66725c1444db67127115d611c982b62b45d8c (patch) | |
| tree | b57a93cb524edc09a4c402ffaa33a95324d48167 /include/linux/sched | |
| parent | dcc2dc45f7cf267d37843059ff75b70260596c69 (diff) | |
| download | linux-cda66725c1444db67127115d611c982b62b45d8c.tar.xz | |
sched/headers: Move the get_task_struct()/put_task_struct() and related APIs from <linux/sched.h> to <linux/sched/task.h>
These belong into the task lifetime API header.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/sched')
| -rw-r--r-- | include/linux/sched/task.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h index a33a8121da9a..3886ae64148f 100644 --- a/include/linux/sched/task.h +++ b/include/linux/sched/task.h @@ -75,6 +75,21 @@ extern long do_fork(unsigned long, unsigned long, unsigned long, int __user *, i struct task_struct *fork_idle(int); extern pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); +extern void free_task(struct task_struct *tsk); + +#define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0) + +extern void __put_task_struct(struct task_struct *t); + +static inline void put_task_struct(struct task_struct *t) +{ + if (atomic_dec_and_test(&t->usage)) + __put_task_struct(t); +} + +struct task_struct *task_rcu_dereference(struct task_struct **ptask); +struct task_struct *try_get_task_struct(struct task_struct **ptask); + #ifdef CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT extern int arch_task_struct_size __read_mostly; |