Re: [PATCH v3 3/5] arch: Register fchmodat4, usually as syscall 451

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On Tue, Jul 11, 2023, at 13:25, Alexey Gladkov wrote:
> From: Palmer Dabbelt <palmer@xxxxxxxxxx>
>
> This registers the new fchmodat4 syscall in most places as nuber 451,
> with alpha being the exception where it's 561.  I found all these sites
> by grepping for fspick, which I assume has found me everything.
>
> Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxx>
> Signed-off-by: Alexey Gladkov <legion@xxxxxxxxxx>

In linux-6.5-rc1, number 451 is used for __NR_cachestat, the
next free one at the moment is 452.

>  arch/arm/tools/syscall.tbl                  | 1 +
>  arch/arm64/include/asm/unistd32.h           | 2 ++

Unfortunately, you still also need to change __NR_compat_syscalls
in arch/arm64/include/asm/unistd.h. Aside from these two issues,
your patch is the correct way to hook up a new syscall.

   Arnd



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