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authorDaniel Borkmann <dborkman@redhat.com>2013-11-12 23:45:42 +0100
committerDavid S. Miller <davem@davemloft.net>2013-11-14 16:06:02 -0500
commit0125737accc5aac532719aecd80615364caa9e0f (patch)
tree2f592b7a2597b93ad262945d3deca0d169ef5e1b /lib
parent66b251422be7cb39e7619fee647724720f74d1f7 (diff)
random32: use msecs_to_jiffies for reseed timer
Use msecs_to_jiffies, for these calculations as different HZ considerations are taken into account for conversion of the timer shot, and also it makes the code more readable. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib')
-rw-r--r--lib/random32.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/random32.c b/lib/random32.c
index 4f9d5dffc554..1e5b2df44291 100644
--- a/lib/random32.c
+++ b/lib/random32.c
@@ -214,18 +214,22 @@ static DEFINE_TIMER(seed_timer, __prandom_timer, 0, 0);
static void __prandom_timer(unsigned long dontcare)
{
u32 entropy;
+ unsigned long expires;
get_random_bytes(&entropy, sizeof(entropy));
prandom_seed(entropy);
+
/* reseed every ~60 seconds, in [40 .. 80) interval with slack */
- seed_timer.expires = jiffies + (40 * HZ + (prandom_u32() % (40 * HZ)));
+ expires = 40 + (prandom_u32() % 40);
+ seed_timer.expires = jiffies + msecs_to_jiffies(expires * MSEC_PER_SEC);
+
add_timer(&seed_timer);
}
static void __init __prandom_start_seed_timer(void)
{
set_timer_slack(&seed_timer, HZ);
- seed_timer.expires = jiffies + 40 * HZ;
+ seed_timer.expires = jiffies + msecs_to_jiffies(40 * MSEC_PER_SEC);
add_timer(&seed_timer);
}