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| author | Thomas Gleixner <tglx@linutronix.de> | 2021-02-01 10:01:33 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-03 23:19:49 +0100 |
| commit | 25f319bbcc81f1363275eb5007b5f204b55ba834 (patch) | |
| tree | 05b0fd5c0e94eaf28808c7f41268d7f863e5b956 /include/linux | |
| parent | bdb116cd8adcee533cb11d86ddb3aebcca548bd9 (diff) | |
| download | linux-stable-25f319bbcc81f1363275eb5007b5f204b55ba834.tar.gz linux-stable-25f319bbcc81f1363275eb5007b5f204b55ba834.tar.bz2 linux-stable-25f319bbcc81f1363275eb5007b5f204b55ba834.zip | |
futex: Move futex exit handling into futex code
commit ba31c1a48538992316cc71ce94fa9cd3e7b427c0 upstream.
The futex exit handling is #ifdeffed into mm_release() which is not pretty
to begin with. But upcoming changes to address futex exit races need to add
more functionality to this exit code.
Split it out into a function, move it into futex code and make the various
futex exit functions static.
Preparatory only and no functional change.
Folded build fix from Borislav.
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/20191106224556.049705556@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/compat.h | 2 | ||||
| -rw-r--r-- | include/linux/futex.h | 24 |
2 files changed, 17 insertions, 9 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h index fab35daf8759..6b9d38a7adca 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -311,8 +311,6 @@ struct compat_kexec_segment; struct compat_mq_attr; struct compat_msgbuf; -extern void compat_exit_robust_list(struct task_struct *curr); - asmlinkage long compat_sys_set_robust_list(struct compat_robust_list_head __user *head, compat_size_t len); diff --git a/include/linux/futex.h b/include/linux/futex.h index fb4e12cbe887..63d353cedfcd 100644 --- a/include/linux/futex.h +++ b/include/linux/futex.h @@ -1,6 +1,8 @@ #ifndef _LINUX_FUTEX_H #define _LINUX_FUTEX_H +#include <linux/sched.h> + #include <uapi/linux/futex.h> struct inode; @@ -53,14 +55,22 @@ union futex_key { #define FUTEX_KEY_INIT (union futex_key) { .both = { .ptr = 0ULL } } #ifdef CONFIG_FUTEX -extern void exit_robust_list(struct task_struct *curr); -extern void exit_pi_state_list(struct task_struct *curr); -#else -static inline void exit_robust_list(struct task_struct *curr) -{ -} -static inline void exit_pi_state_list(struct task_struct *curr) +static inline void futex_init_task(struct task_struct *tsk) { + tsk->robust_list = NULL; +#ifdef CONFIG_COMPAT + tsk->compat_robust_list = NULL; +#endif + INIT_LIST_HEAD(&tsk->pi_state_list); + tsk->pi_state_cache = NULL; } + +void futex_mm_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) { } #endif #endif |