linux-kernel - Re: [PATCH] arch/tile: Fix syscall return value passed to tracepoint

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Message-ID: <5178446B.4050901@tilera.com>
Date:	Wed, 24 Apr 2013 16:45:31 -0400
From:	Chris Metcalf <cmetcalf@...era.com>
To:	Simon Marchi <simon.marchi@...ymtl.ca>
CC:	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arch/tile: Fix syscall return value passed to tracepoint

On 4/17/2013 11:01 AM, Simon Marchi wrote:
> Currently the syscall number is passed, but it should be the return
> value, which is kept in r0.
>
> Signed-off-by: Simon Marchi <simon.marchi@...ymtl.ca>
> ---
> This patch applies on Chris Metcalf's tree:
>   http://git.kernel.org/cgit/linux/kernel/git/cmetcalf/linux-tile.git
>
> arch/tile/include/uapi/arch/abi.h |    2 ++
>  arch/tile/kernel/ptrace.c         |    2 +-
>  2 files changed, 3 insertions(+), 1 deletions(-)

Accepted into the tile tree, but just using [0] instead of adding a new <arch/abi.h> #define.  The reason is that the compiler actually uses r0..r9 inclusive for return values, e.g. returning small structs, so I'm reluctant to call out r0 for a special name.

-- 
Chris Metcalf, Tilera Corp.
http://www.tilera.com

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