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

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.comSigned-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 33e16272
...@@ -3209,7 +3209,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) ...@@ -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 * select a random position to start with to help wear leveling
* SSD * 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); nr_cluster = DIV_ROUND_UP(maxpages, SWAPFILE_CLUSTER);
cluster_info = kvcalloc(nr_cluster, sizeof(*cluster_info), cluster_info = kvcalloc(nr_cluster, sizeof(*cluster_info),
......
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