From: Akinobu Mita <akinobu.mita@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: Akinobu Mita <akinobu.mita@gmail.com>,
Jeff Dike <jdike@addtoit.com>,
user-mode-linux-devel@lists.sourceforge.net
Subject: [PATCH] uml: use simple_write_to_buffer
Date: Sat, 25 Dec 2010 15:03:57 +0900 [thread overview]
Message-ID: <1293257039-2580-2-git-send-email-akinobu.mita@gmail.com> (raw)
In-Reply-To: <n>
Simplify write file operation for mmapper by using
simple_write_to_buffer().
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: user-mode-linux-devel@lists.sourceforge.net
---
arch/um/drivers/mmapper_kern.c | 8 +-------
1 files changed, 1 insertions(+), 7 deletions(-)
diff --git a/arch/um/drivers/mmapper_kern.c b/arch/um/drivers/mmapper_kern.c
index 8501e7d..4ad91c6 100644
--- a/arch/um/drivers/mmapper_kern.c
+++ b/arch/um/drivers/mmapper_kern.c
@@ -37,13 +37,7 @@ static ssize_t mmapper_write(struct file *file, const char __user *buf,
if (*ppos > mmapper_size)
return -EINVAL;
- if (count > mmapper_size - *ppos)
- count = mmapper_size - *ppos;
-
- if (copy_from_user(&v_buf[*ppos], buf, count))
- return -EFAULT;
-
- return count;
+ return simple_write_to_buffer(v_buf, mmapper_size, ppos, buf, count);
}
static long mmapper_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
--
1.7.3.4
reply other threads:[~2010-12-25 6:03 UTC|newest]
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