ocfs2: Move 'wanted' into parens of ocfs2_resmap_resv_bits.

The first time I read the function ocfs2_resmap_resv_bits, I consider
about what 'wanted' will be used and consider about the comments.
Then I find it is only used if the reservation is empty. ;)

So we'd better move it to the parens so that it make the code more
readable, what's more, ocfs2_resmap_resv_bits is used so frequently
and we should save some cpus.

Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>

diff --git a/fs/ocfs2/reservations.c b/fs/ocfs2/reservations.c
index d8b6e42..3e78db3 100644 (file)
--- a/fs/ocfs2/reservations.c
+++ b/fs/ocfs2/reservations.c
@@ -732,25 +732,23 @@ int ocfs2_resmap_resv_bits(struct ocfs2_reservation_map *resmap,
                           struct ocfs2_alloc_reservation *resv,
                           int *cstart, int *clen)
 {
-       unsigned int wanted = *clen;
-
        if (resv == NULL || ocfs2_resmap_disabled(resmap))
                return -ENOSPC;
 
        spin_lock(&resv_lock);
 
-       /*
-        * We don't want to over-allocate for temporary
-        * windows. Otherwise, we run the risk of fragmenting the
-        * allocation space.
-        */
-       wanted = ocfs2_resv_window_bits(resmap, resv);
-       if ((resv->r_flags & OCFS2_RESV_FLAG_TMP) || wanted < *clen)
-               wanted = *clen;
-
        if (ocfs2_resv_empty(resv)) {
-               mlog(0, "empty reservation, find new window\n");
+               /*
+                * We don't want to over-allocate for temporary
+                * windows. Otherwise, we run the risk of fragmenting the
+                * allocation space.
+                */
+               unsigned int wanted = ocfs2_resv_window_bits(resmap, resv);
 
+               if ((resv->r_flags & OCFS2_RESV_FLAG_TMP) || wanted < *clen)
+                       wanted = *clen;
+
+               mlog(0, "empty reservation, find new window\n");
                /*
                 * Try to get a window here. If it works, we must fall
                 * through and test the bitmap . This avoids some