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), _
