Re: [PATCH v1 09/14] futex: Add sys_futex_requeue()
From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: 2023-07-25 07:27:29
Also in:
linux-arch, linux-mm, lkml
On Fri, Jul 21, 2023 at 1:11 PM Peter Zijlstra [off-list ref] wrote:
Finish of the 'simple' futex2 syscall group by adding
sys_futex_requeue(). Unlike sys_futex_{wait,wake}() it's 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>arch/m68k/kernel/syscalls/syscall.tbl | 1
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
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-- Linus Torvalds