+++ /dev/null
-#ifndef __LINUX_TIMER_WRAPPER_H
-#define __LINUX_TIMER_WRAPPER_H 1
-
-#include_next <linux/timer.h>
-
-#include <linux/version.h>
-
-#ifndef RHEL_RELEASE_VERSION
-#define RHEL_RELEASE_VERSION(X, Y) (0)
-#endif
-#if ((LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)) && \
- (!defined(RHEL_RELEASE_CODE) || \
- (RHEL_RELEASE_CODE < RHEL_RELEASE_VERSION(5, 1))))
-
-extern unsigned long volatile jiffies;
-
-/**
- * __round_jiffies - function to round jiffies to a full second
- * @j: the time in (absolute) jiffies that should be rounded
- * @cpu: the processor number on which the timeout will happen
- *
- * __round_jiffies() rounds an absolute time in the future (in jiffies)
- * up or down to (approximately) full seconds. This is useful for timers
- * for which the exact time they fire does not matter too much, as long as
- * they fire approximately every X seconds.
- *
- * By rounding these timers to whole seconds, all such timers will fire
- * at the same time, rather than at various times spread out. The goal
- * of this is to have the CPU wake up less, which saves power.
- *
- * The exact rounding is skewed for each processor to avoid all
- * processors firing at the exact same time, which could lead
- * to lock contention or spurious cache line bouncing.
- *
- * The return value is the rounded version of the @j parameter.
- */
-static inline unsigned long __round_jiffies(unsigned long j, int cpu)
-{
- int rem;
- unsigned long original = j;
-
- /*
- * We don't want all cpus firing their timers at once hitting the
- * same lock or cachelines, so we skew each extra cpu with an extra
- * 3 jiffies. This 3 jiffies came originally from the mm/ code which
- * already did this.
- * The skew is done by adding 3*cpunr, then round, then subtract this
- * extra offset again.
- */
- j += cpu * 3;
-
- rem = j % HZ;
-
- /*
- * If the target jiffie is just after a whole second (which can happen
- * due to delays of the timer irq, long irq off times etc etc) then
- * we should round down to the whole second, not up. Use 1/4th second
- * as cutoff for this rounding as an extreme upper bound for this.
- */
- if (rem < HZ/4) /* round down */
- j = j - rem;
- else /* round up */
- j = j - rem + HZ;
-
- /* now that we have rounded, subtract the extra skew again */
- j -= cpu * 3;
-
- if (j <= jiffies) /* rounding ate our timeout entirely; */
- return original;
- return j;
-}
-
-
-/**
- * round_jiffies - function to round jiffies to a full second
- * @j: the time in (absolute) jiffies that should be rounded
- *
- * round_jiffies() rounds an absolute time in the future (in jiffies)
- * up or down to (approximately) full seconds. This is useful for timers
- * for which the exact time they fire does not matter too much, as long as
- * they fire approximately every X seconds.
- *
- * By rounding these timers to whole seconds, all such timers will fire
- * at the same time, rather than at various times spread out. The goal
- * of this is to have the CPU wake up less, which saves power.
- *
- * The return value is the rounded version of the @j parameter.
- */
-static inline unsigned long round_jiffies(unsigned long j)
-{
- return __round_jiffies(j, 0); /* FIXME */
-}
-
-#endif /* linux kernel < 2.6.20 */
-
-#endif