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authorAkinobu Mita <akinobu.mita@gmail.com>2011-01-12 16:59:28 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-13 08:03:07 -0800
commit0388fae4115dcfc310ac7327a8ac72786987c26e (patch)
tree87af4fc66ff911d996d5bbc1b49ad84ddedc5210 /arch/um
parent07ecb79f513fc126c56642caaf9efeeefaceffaa (diff)
downloadop-kernel-dev-0388fae4115dcfc310ac7327a8ac72786987c26e.zip
op-kernel-dev-0388fae4115dcfc310ac7327a8ac72786987c26e.tar.gz
uml: use simple_write_to_buffer()
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> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/drivers/mmapper_kern.c8
1 files changed, 1 insertions, 7 deletions
diff --git a/arch/um/drivers/mmapper_kern.c b/arch/um/drivers/mmapper_kern.c
index 6bc73f0..7e0619c 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)
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