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authorLinus Torvalds <torvalds@linux-foundation.org>2014-02-15 16:04:42 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-02-15 16:04:42 -0800
commit3a19c07c565c1e05b73b165c3dc0750d6863a81c (patch)
treea13bceba673aac05ac49ad96baa338596ef11fef /kernel
parent9bd01b9bbdc0aedcc49a6d974a0f30c0a9367f9e (diff)
parentdd5fd9b91a77b4c9c28b7ef9c181b1a875820d0a (diff)
downloadlinux-3a19c07c565c1e05b73b165c3dc0750d6863a81c.tar.gz
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner: "The following trilogy of patches brings you: - fix for a long standing math overflow issue with HZ < 60 - an onliner fix for a corner case in the dreaded tick broadcast mechanism affecting a certain range of AMD machines which are infested with the infamous automagic C1E power control misfeature - a fix for one of the ARM platforms which allows the kernel to proceed and boot instead of stupidly panicing for no good reason. The patch is slightly larger than necessary, but it's less ugly than the alternative 5 liner" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: tick: Clear broadcast pending bit when switching to oneshot clocksource: Kona: Print warning rather than panic time: Fix overflow when HZ is smaller than 60
Diffstat (limited to 'kernel')
-rw-r--r--kernel/time/jiffies.c6
-rw-r--r--kernel/time/tick-broadcast.c1
2 files changed, 7 insertions, 0 deletions
diff --git a/kernel/time/jiffies.c b/kernel/time/jiffies.c
index 7a925ba456f..a6a5bf53e86 100644
--- a/kernel/time/jiffies.c
+++ b/kernel/time/jiffies.c
@@ -51,7 +51,13 @@
* HZ shrinks, so values greater than 8 overflow 32bits when
* HZ=100.
*/
+#if HZ < 34
+#define JIFFIES_SHIFT 6
+#elif HZ < 67
+#define JIFFIES_SHIFT 7
+#else
#define JIFFIES_SHIFT 8
+#endif
static cycle_t jiffies_read(struct clocksource *cs)
{
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index 43780ab5e27..98977a57ac7 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -756,6 +756,7 @@ out:
static void tick_broadcast_clear_oneshot(int cpu)
{
cpumask_clear_cpu(cpu, tick_broadcast_oneshot_mask);
+ cpumask_clear_cpu(cpu, tick_broadcast_pending_mask);
}
static void tick_broadcast_init_next_event(struct cpumask *mask,