I guess when aio was introduced this was probably forgotten. For small chunks
or synchronous i/o the likehood is correct, but for big data chunks and aio
the likehood is false.
Signed-off-by: Bernd Schubert <[email protected]>
Signed-off-by: Goswin von Brederlow <[email protected]>
Index: linux-2.6.20.3/mm/filemap.c
===================================================================
--- linux-2.6.20.3.orig/mm/filemap.c 2007-09-05 18:51:59.000000000 +0200
+++ linux-2.6.20.3/mm/filemap.c 2007-09-05 18:53:12.000000000 +0200
@@ -2100,7 +2100,7 @@
/*
* handle partial DIO write. Adjust cur_iov if needed.
*/
- if (likely(nr_segs == 1))
+ if (nr_segs == 1)
buf = iov->iov_base + written;
else {
filemap_set_next_iovec(&cur_iov, &iov_base, written);
@@ -2167,7 +2167,7 @@
vmtruncate(inode, isize);
}
}
- if (likely(nr_segs == 1))
+ if (nr_segs == 1)
copied = filemap_copy_from_user(page, offset,
buf, bytes);
else
@@ -2213,7 +2213,7 @@
count -= copied;
pos += copied;
buf += copied;
- if (unlikely(nr_segs > 1)) {
+ if (nr_segs > 1) {
filemap_set_next_iovec(&cur_iov,
&iov_base, copied);
if (count)
-
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