linux-kernel - Re: [PATCH 2/2] MIPS: set NR_syscall

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Date:   Tue, 27 Sep 2016 14:04:42 +0200
From:   Ralf Baechle <ralf@...ux-mips.org>
To:     Marcin Nowakowski <marcin.nowakowski@...tec.com>
Cc:     linux-mips@...r.kernel.org,
        "open list:MIPS" <linux-mips@...ux-mips.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] MIPS: set NR_syscall_tables appropriately

On Mon, Aug 29, 2016 at 11:30:07AM +0200, Marcin Nowakowski wrote:

> Depending on the kernel configuration, up to 3 syscall tables can be
> used in parallel - so set the number properly to ensure syscall tracing
> is set up properly.
> 
> Signed-off-by: Marcin Nowakowski <marcin.nowakowski@...tec.com>
> ---
>  arch/mips/include/asm/unistd.h | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/mips/include/asm/unistd.h b/arch/mips/include/asm/unistd.h
> index e558130..71162f3d 100644
> --- a/arch/mips/include/asm/unistd.h
> +++ b/arch/mips/include/asm/unistd.h
> @@ -22,6 +22,10 @@
>  #define NR_syscalls  (__NR_O32_Linux + __NR_O32_Linux_syscalls)
>  #endif
>  
> +#define NR_syscall_tables (1 + \
> +	IS_ENABLED(CONFIG_MIPS32_O32) + \
> +	IS_ENABLED(CONFIG_MIPS32_N32))
> +
>  #ifndef __ASSEMBLY__

NR_syscall_tables is a new symbol but I don't see any users of this
symbol?

  Ralf