The patch titled
/dev/mem: remove redundant test on len
has been removed from the -mm tree. Its filename was
dev-mem-remove-redundant-test-on-len.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: /dev/mem: remove redundant test on len
From: Wu Fengguang <fengguang.wu@xxxxxxxxx>
The len test in write_kmem() is always true, so can be reduced.
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Acked-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxx>
Cc: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Cc: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
Cc: Avi Kivity <avi@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/char/mem.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff -puN drivers/char/mem.c~dev-mem-remove-redundant-test-on-len drivers/char/mem.c
--- a/drivers/char/mem.c~dev-mem-remove-redundant-test-on-len
+++ a/drivers/char/mem.c
@@ -581,14 +581,12 @@ static ssize_t write_kmem(struct file *
if (len > PAGE_SIZE)
len = PAGE_SIZE;
- if (len) {
- written = copy_from_user(kbuf, buf, len);
- if (written) {
- if (wrote + virtr)
- break;
- free_page((unsigned long)kbuf);
- return -EFAULT;
- }
+ written = copy_from_user(kbuf, buf, len);
+ if (written) {
+ if (wrote + virtr)
+ break;
+ free_page((unsigned long)kbuf);
+ return -EFAULT;
}
len = vwrite(kbuf, (char *)p, len);
count -= len;
_
Patches currently in -mm which might be from fengguang.wu@xxxxxxxxx are
origin.patch
linux-next.patch
readahead-add-blk_run_backing_dev.patch
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