diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2025-04-16 18:29:13 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-05-03 12:02:08 +0200 |
| commit | 7c4f75a21f636486d2969d9b6680403ea8483539 (patch) | |
| tree | 7ba61bc8ba91244f8180bcd17e7f54679fe9e0aa /include/linux/futex.h | |
| parent | 80367ad01d93ac781b0e1df246edaf006928002f (diff) | |
futex: Allow automatic allocation of process wide futex hash
Allocate a private futex hash with 16 slots if a task forks its first
thread.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250416162921.513656-14-bigeasy@linutronix.de
Diffstat (limited to 'include/linux/futex.h')
| -rw-r--r-- | include/linux/futex.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/futex.h b/include/linux/futex.h index 8f1be08bef18..1d3f7555825e 100644 --- a/include/linux/futex.h +++ b/include/linux/futex.h @@ -80,6 +80,7 @@ long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout, int futex_hash_prctl(unsigned long arg2, unsigned long arg3, unsigned long arg4); #ifdef CONFIG_FUTEX_PRIVATE_HASH +int futex_hash_allocate_default(void); void futex_hash_free(struct mm_struct *mm); static inline void futex_mm_init(struct mm_struct *mm) @@ -88,6 +89,7 @@ static inline void futex_mm_init(struct mm_struct *mm) } #else /* !CONFIG_FUTEX_PRIVATE_HASH */ +static inline int futex_hash_allocate_default(void) { return 0; } static inline void futex_hash_free(struct mm_struct *mm) { } static inline void futex_mm_init(struct mm_struct *mm) { } #endif /* CONFIG_FUTEX_PRIVATE_HASH */ @@ -107,6 +109,10 @@ static inline int futex_hash_prctl(unsigned long arg2, unsigned long arg3, unsig { return -EINVAL; } +static inline int futex_hash_allocate_default(void) +{ + return 0; +} static inline void futex_hash_free(struct mm_struct *mm) { } static inline void futex_mm_init(struct mm_struct *mm) { } |