diff options
| author | peterz@infradead.org <peterz@infradead.org> | 2023-09-21 12:45:15 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2023-09-21 19:22:10 +0200 |
| commit | 0f4b5f972216782a4acb1ae00dcb55173847c2ff (patch) | |
| tree | 710b4dc70ea653c5fc01f9882a96a6dbc3e61778 /arch/arm64/include/asm/unistd.h | |
| parent | 27b88f3519e72d71c8cead6b835a26c171109c9b (diff) | |
futex: Add sys_futex_requeue()
Finish off the 'simple' futex2 syscall group by adding
sys_futex_requeue(). Unlike sys_futex_{wait,wake}() its arguments are
too numerous to fit into a regular syscall. As such, use struct
futex_waitv to pass the 'source' and 'destination' futexes to the
syscall.
This syscall implements what was previously known as FUTEX_CMP_REQUEUE
and uses {val, uaddr, flags} for source and {uaddr, flags} for
destination.
This design explicitly allows requeueing between different types of
futex by having a different flags word per uaddr.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20230921105248.511860556@noisy.programming.kicks-ass.net
Diffstat (limited to 'arch/arm64/include/asm/unistd.h')
| -rw-r--r-- | arch/arm64/include/asm/unistd.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h index f33190f17ebb..531effca5f1f 100644 --- a/arch/arm64/include/asm/unistd.h +++ b/arch/arm64/include/asm/unistd.h @@ -39,7 +39,7 @@ #define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE + 5) #define __ARM_NR_COMPAT_END (__ARM_NR_COMPAT_BASE + 0x800) -#define __NR_compat_syscalls 456 +#define __NR_compat_syscalls 457 #endif #define __ARCH_WANT_SYS_CLONE |