[2/3] mm/swapfile.c: explicitly show ssd/non-ssd is handled mutually exclusive

Commit Message

Wei Yang March 28, 2020, 6:05 a.m. UTC

The code shows if this is ssd, it will jump to specific tag and skip the
following code for non-ssd.

Let's use "else if" to explicitly show the mutually exclusion for
ssd/non-ssd to reduce ambiguity.

Signed-off-by: Wei Yang <[e-mail]>
---
 mm/swapfile.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

Patch

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 52afb74fc3d1..adf48d4b1b63 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -760,9 +760,7 @@  static int scan_swap_map_slots(struct swap_info_struct *si,
 			goto checks;
 		else
 			goto scan;
-	}
-
-	if (unlikely(!si->cluster_nr--)) {
+	} else if (unlikely(!si->cluster_nr--)) {
 		if (si->pages - si->inuse_pages < SWAPFILE_CLUSTER) {
 			si->cluster_nr = SWAPFILE_CLUSTER - 1;
 			goto checks;
@@ -870,10 +868,8 @@  static int scan_swap_map_slots(struct swap_info_struct *si,
 			goto checks;
 		else
 			goto done;
-	}
-
-	/* non-ssd case, still more slots in cluster? */
-	if (si->cluster_nr && !si->swap_map[++offset]) {
+	} else if (si->cluster_nr && !si->swap_map[++offset]) {
+		/* non-ssd case, still more slots in cluster? */
 		--si->cluster_nr;
 		goto checks;
 	}