linux-kernel - Re: [PATCH] init/main.c: add __force markup when casts to a _

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Date:	Tue, 17 Aug 2010 13:56:05 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Namhyung Kim <namhyung@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] init/main.c: add __force markup when casts to a __user
 pointer

On Sun, Aug 15, 2010 at 06:53:18PM +0900, Namhyung Kim wrote:
>add __force markup when casts to a __user address space pointer. This removes
>following sparse warnings:
>
> init/main.c:900:23: warning: cast adds address space to expression (<asn:1>)
> init/main.c:913:25: warning: cast adds address space to expression (<asn:1>)
>
>Signed-off-by: Namhyung Kim <namhyung@...il.com>

Acked-by: WANG Cong <xiyou.wangcong@...il.com>

Thanks!

>---
> init/main.c |    4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
>diff --git a/init/main.c b/init/main.c
>index b06b8f2..5a0be5c 100644
>--- a/init/main.c
>+++ b/init/main.c
>@@ -897,7 +897,7 @@ static int __init kernel_init(void * unused)
> 	do_basic_setup();
> 
> 	/* Open the /dev/console on the rootfs, this should never fail */
>-	if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0)
>+	if (sys_open((const char __user __force *) "/dev/console", O_RDWR, 0) < 0)
> 		printk(KERN_WARNING "Warning: unable to open an initial console.\n");
> 
> 	(void) sys_dup(0);
>@@ -910,7 +910,7 @@ static int __init kernel_init(void * unused)
> 	if (!ramdisk_execute_command)
> 		ramdisk_execute_command = "/init";
> 
>-	if (sys_access((const char __user *) ramdisk_execute_command, 0) != 0) {
>+	if (sys_access((const char __user __force *) ramdisk_execute_command, 0) != 0) {
> 		ramdisk_execute_command = NULL;
> 		prepare_namespace();
> 	}
>-- 
>1.7.0.4
>
>--
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