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| author | Peter Zijlstra <peterz@infradead.org> | 2021-09-23 14:10:51 -0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-10-07 13:51:07 +0200 |
| commit | af8cc9600bbf2251b04c56139f7c83f87c3f878a (patch) | |
| tree | 41bc00acc21f81e5346e811d30548839a4686c9c /kernel/futex/futex.h | |
| parent | 77e52ae35463521041906c510fe580d15663bb93 (diff) | |
| download | linux-stable-af8cc9600bbf2251b04c56139f7c83f87c3f878a.tar.gz linux-stable-af8cc9600bbf2251b04c56139f7c83f87c3f878a.tar.bz2 linux-stable-af8cc9600bbf2251b04c56139f7c83f87c3f878a.zip | |
futex: Split out syscalls
Put the syscalls in their own little file.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: André Almeida <andrealmeid@collabora.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: André Almeida <andrealmeid@collabora.com>
Link: https://lore.kernel.org/r/20210923171111.300673-3-andrealmeid@collabora.com
Diffstat (limited to 'kernel/futex/futex.h')
| -rw-r--r-- | kernel/futex/futex.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/kernel/futex/futex.h b/kernel/futex/futex.h new file mode 100644 index 000000000000..7bb4ca8bf32f --- /dev/null +++ b/kernel/futex/futex.h @@ -0,0 +1,58 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _FUTEX_H +#define _FUTEX_H + +#include <asm/futex.h> + +/* + * Futex flags used to encode options to functions and preserve them across + * restarts. + */ +#ifdef CONFIG_MMU +# define FLAGS_SHARED 0x01 +#else +/* + * NOMMU does not have per process address space. Let the compiler optimize + * code away. + */ +# define FLAGS_SHARED 0x00 +#endif +#define FLAGS_CLOCKRT 0x02 +#define FLAGS_HAS_TIMEOUT 0x04 + +#ifdef CONFIG_HAVE_FUTEX_CMPXCHG +#define futex_cmpxchg_enabled 1 +#else +extern int __read_mostly futex_cmpxchg_enabled; +#endif + +#ifdef CONFIG_FAIL_FUTEX +extern bool should_fail_futex(bool fshared); +#else +static inline bool should_fail_futex(bool fshared) +{ + return false; +} +#endif + +extern int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, u32 + val, ktime_t *abs_time, u32 bitset, u32 __user + *uaddr2); + +extern int futex_requeue(u32 __user *uaddr1, unsigned int flags, + u32 __user *uaddr2, int nr_wake, int nr_requeue, + u32 *cmpval, int requeue_pi); + +extern int futex_wait(u32 __user *uaddr, unsigned int flags, u32 val, + ktime_t *abs_time, u32 bitset); + +extern int futex_wake(u32 __user *uaddr, unsigned int flags, int nr_wake, u32 bitset); + +extern int futex_wake_op(u32 __user *uaddr1, unsigned int flags, + u32 __user *uaddr2, int nr_wake, int nr_wake2, int op); + +extern int futex_unlock_pi(u32 __user *uaddr, unsigned int flags); + +extern int futex_lock_pi(u32 __user *uaddr, unsigned int flags, ktime_t *time, int trylock); + +#endif /* _FUTEX_H */ |