Commit 09fe06ce authored by Huang Ying's avatar Huang Ying Committed by Linus Torvalds
Browse files

mm/swapfile.c: use prandom_u32_max() 



To improve the code readability and take advantage of the common
implementation.

Signed-off-by: default avatar"Huang, Ying" <ying.huang@intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Acked-by: default avatarMichal Hocko <mhocko@suse.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Link: http://lkml.kernel.org/r/20200512081013.520201-1-ying.huang@intel.com


Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 33e16272

mm/swapfile.c

+1 −1
Original line number Diff line number Diff line
@@ -3209,7 +3209,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) 
		 * 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),