The patch titled
Subject: mm/swapfile.c: use prandom_u32_max()
has been added to the -mm tree. Its filename is
mm-swap-use-prandom_u32_max.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-swap-use-prandom_u32_max.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-swap-use-prandom_u32_max.patch
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------------------------------------------------------
From: Huang Ying <ying.huang@xxxxxxxxx>
Subject: mm/swapfile.c: use prandom_u32_max()
To improve the code readability and take advantage of the common
implementation.
Link: http://lkml.kernel.org/r/20200512081013.520201-1-ying.huang@xxxxxxxxx
Signed-off-by: "Huang, Ying" <ying.huang@xxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/swapfile.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/swapfile.c~mm-swap-use-prandom_u32_max
+++ a/mm/swapfile.c
@@ -3209,7 +3209,7 @@ SYSCALL_DEFINE2(swapon, const char __use
* select a random position to start with to help wear leveling
* SSD
*/
- p->cluster_next = 1 + (prandom_u32() % p->highest_bit);
+ p->cluster_next = 1 + prandom_u32_max(p->highest_bit);
nr_cluster = DIV_ROUND_UP(maxpages, SWAPFILE_CLUSTER);
cluster_info = kvcalloc(nr_cluster, sizeof(*cluster_info),
_
Patches currently in -mm which might be from ying.huang@xxxxxxxxx are
swap-try-to-scan-more-free-slots-even-when-fragmented.patch
mm-swap-use-prandom_u32_max.patch
proc-pid-smaps-add-pmd-migration-entry-parsing.patch
