linux-kernel - Re: [PATCH v2] arch: tile: kernel: signal.c: Use __copy_from/to_user() instead of __get/put

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Message-ID: <5458F3F8.3030100@tilera.com>
Date:	Tue, 4 Nov 2014 10:42:48 -0500
From:	Chris Metcalf <cmetcalf@...era.com>
To:	Chen Gang <gang.chen.5i5j@...il.com>, <dwalter@...gle.com>,
	<richard@....at>, Al Viro <viro@...IV.linux.org.uk>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] arch: tile: kernel: signal.c: Use __copy_from/to_user()
 instead of __get/put_user()

On 11/1/2014 10:13 PM, Chen Gang wrote:
> setup/restore_sigcontext() want to copy all related registers between
> user and kernel. So use block copy instead of each registers copy. Then
> can let code simple and clearer (which can avoid compiler's warning):
>
> [...]
>
> Signed-off-by: Chen Gang <gang.chen.5i5j@...il.com>
> ---
>   arch/tile/kernel/signal.c | 12 ++----------
>   1 file changed, 2 insertions(+), 10 deletions(-)
>
> diff --git a/arch/tile/kernel/signal.c b/arch/tile/kernel/signal.c
> index 7c2fecc..f867783 100644
> --- a/arch/tile/kernel/signal.c
> +++ b/arch/tile/kernel/signal.c
> @@ -46,7 +46,6 @@ int restore_sigcontext(struct pt_regs *regs,
>   		       struct sigcontext __user *sc)
>   {
>   	int err = 0;
> -	int i;

Taken into the tile tree, but I removed the now-redundant initialization
of err (shown above).

Thanks!

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

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