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uml: use simple_write_to_buffer()

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Simplify write file operation for mmapper by using
simple_write_to_buffer().

Signed-off-by: Akinobu Mita <[email protected]>
Cc: Jeff Dike <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Akinobu Mita 2011-01-12 16:59:28 -08:00 • committed by Linus Torvalds
commit 0388fae411
1 changed files with 1 additions and 7 deletions
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8
arch/um/drivers/mmapper_kern.c
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@ -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)