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0f4b5f9722
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
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2012 ARM Ltd.
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*/
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#ifdef CONFIG_COMPAT
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#define __ARCH_WANT_COMPAT_STAT
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#define __ARCH_WANT_COMPAT_STAT64
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#define __ARCH_WANT_SYS_GETHOSTNAME
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#define __ARCH_WANT_SYS_PAUSE
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#define __ARCH_WANT_SYS_GETPGRP
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#define __ARCH_WANT_SYS_NICE
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#define __ARCH_WANT_SYS_SIGPENDING
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#define __ARCH_WANT_SYS_SIGPROCMASK
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#define __ARCH_WANT_COMPAT_SYS_SENDFILE
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#define __ARCH_WANT_SYS_UTIME32
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#define __ARCH_WANT_SYS_FORK
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#define __ARCH_WANT_SYS_VFORK
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/*
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* Compat syscall numbers used by the AArch64 kernel.
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*/
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#define __NR_compat_restart_syscall 0
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#define __NR_compat_exit 1
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#define __NR_compat_read 3
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#define __NR_compat_write 4
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#define __NR_compat_gettimeofday 78
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#define __NR_compat_sigreturn 119
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#define __NR_compat_rt_sigreturn 173
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#define __NR_compat_clock_gettime 263
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#define __NR_compat_clock_getres 264
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#define __NR_compat_clock_gettime64 403
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#define __NR_compat_clock_getres_time64 406
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/*
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* The following SVCs are ARM private.
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*/
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#define __ARM_NR_COMPAT_BASE 0x0f0000
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#define __ARM_NR_compat_cacheflush (__ARM_NR_COMPAT_BASE + 2)
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#define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE + 5)
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#define __ARM_NR_COMPAT_END (__ARM_NR_COMPAT_BASE + 0x800)
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#define __NR_compat_syscalls 457
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#endif
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#define __ARCH_WANT_SYS_CLONE
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#ifndef __COMPAT_SYSCALL_NR
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#include <uapi/asm/unistd.h>
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#endif
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#define NR_syscalls (__NR_syscalls)
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