From 0388fae4115dcfc310ac7327a8ac72786987c26e Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Wed, 12 Jan 2011 16:59:28 -0800 Subject: [PATCH] uml: use simple_write_to_buffer() Simplify write file operation for mmapper by using simple_write_to_buffer(). Signed-off-by: Akinobu Mita Cc: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/drivers/mmapper_kern.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/arch/um/drivers/mmapper_kern.c b/arch/um/drivers/mmapper_kern.c index 6bc73f0e8e29..7e0619c2c2c6 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) -- GitLab