From: Hugh Dickins <hugh@veritas.com>
Date: Tue, 6 Jan 2009 22:39:57 +0000 (-0800)
Subject: swapfile: let others seed random
X-Git-Tag: MMI-PSA29.97-13-9~30317
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f0d7a4b3ed46816f5097d521850a8ab7a0d40f3c;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

swapfile: let others seed random

Remove the srandom32((u32)get_seconds()) from non-rotational swapon:
there's been a coincidental discussion of earlier randomization, assume
that goes ahead, let swapon be a client rather than stirring for itself.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Donjun Shin <djshin90@gmail.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Joern Engel <joern@logfs.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Tejun Heo <teheo@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 6a078557306a..d00523601913 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1851,7 +1851,6 @@ asmlinkage long sys_swapon(const char __user * specialfile, int swap_flags)
 
 	if (blk_queue_nonrot(bdev_get_queue(p->bdev))) {
 		p->flags |= SWP_SOLIDSTATE;
-		srandom32((u32)get_seconds());
 		p->cluster_next = 1 + (random32() % p->highest_bit);
 	}
 	if (discard_swap(p) == 0)