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| author | Thomas Gleixner <tglx@linutronix.de> | 2019-11-06 22:55:39 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-30 13:32:11 +0100 |
| commit | 1dd589346a127db6aa14889ef4099366dcab3a96 (patch) | |
| tree | c0d516e8483d88d19c66874e1821c8444a489033 | |
| parent | 9425476fb17a29b9f1c564321ae4b80129534c57 (diff) | |
| download | linux-stable-1dd589346a127db6aa14889ef4099366dcab3a96.tar.gz linux-stable-1dd589346a127db6aa14889ef4099366dcab3a96.tar.bz2 linux-stable-1dd589346a127db6aa14889ef4099366dcab3a96.zip | |
futex: Split futex_mm_release() for exit/exec
commit 150d71584b12809144b8145b817e83b81158ae5f upstream
To allow separate handling of the futex exit state in the futex exit code
for exit and exec, split futex_mm_release() into two functions and invoke
them from the corresponding exit/exec_mm_release() callsites.
Preparatory only, no functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20191106224556.332094221@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/linux/futex.h | 6 | ||||
| -rw-r--r-- | kernel/fork.c | 5 | ||||
| -rw-r--r-- | kernel/futex.c | 7 |
3 files changed, 12 insertions, 6 deletions
diff --git a/include/linux/futex.h b/include/linux/futex.h index 84e945116126..d141df679863 100644 --- a/include/linux/futex.h +++ b/include/linux/futex.h @@ -96,14 +96,16 @@ static inline void futex_exit_done(struct task_struct *tsk) tsk->futex_state = FUTEX_STATE_DEAD; } -void futex_mm_release(struct task_struct *tsk); +void futex_exit_release(struct task_struct *tsk); +void futex_exec_release(struct task_struct *tsk); long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout, u32 __user *uaddr2, u32 val2, u32 val3); #else static inline void futex_init_task(struct task_struct *tsk) { } -static inline void futex_mm_release(struct task_struct *tsk) { } static inline void futex_exit_done(struct task_struct *tsk) { } +static inline void futex_exit_release(struct task_struct *tsk) { } +static inline void futex_exec_release(struct task_struct *tsk) { } static inline long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout, u32 __user *uaddr2, u32 val2, u32 val3) diff --git a/kernel/fork.c b/kernel/fork.c index 1982db8bebb3..cf535b9d5db7 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1219,9 +1219,6 @@ static int wait_for_vfork_done(struct task_struct *child, */ static void mm_release(struct task_struct *tsk, struct mm_struct *mm) { - /* Get rid of any futexes when releasing the mm */ - futex_mm_release(tsk); - uprobe_free_utask(tsk); /* Get rid of any cached register state */ @@ -1256,11 +1253,13 @@ static void mm_release(struct task_struct *tsk, struct mm_struct *mm) void exit_mm_release(struct task_struct *tsk, struct mm_struct *mm) { + futex_exit_release(tsk); mm_release(tsk, mm); } void exec_mm_release(struct task_struct *tsk, struct mm_struct *mm) { + futex_exec_release(tsk); mm_release(tsk, mm); } diff --git a/kernel/futex.c b/kernel/futex.c index b85326df4a66..6f00ce1c679e 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -3698,7 +3698,7 @@ static void exit_robust_list(struct task_struct *curr) } } -void futex_mm_release(struct task_struct *tsk) +void futex_exec_release(struct task_struct *tsk) { if (unlikely(tsk->robust_list)) { exit_robust_list(tsk); @@ -3716,6 +3716,11 @@ void futex_mm_release(struct task_struct *tsk) exit_pi_state_list(tsk); } +void futex_exit_release(struct task_struct *tsk) +{ + futex_exec_release(tsk); +} + long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout, u32 __user *uaddr2, u32 val2, u32 val3) { |