xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[PATCH] fix next_timer_interrupt() for hrtimer

Browse Source 
Also from Thomas Gleixner <tglx@linutronix.de>

Function next_timer_interrupt() got broken with a recent patch
6ba1b91213 as sys_nanosleep() was moved to
hrtimer.  This broke things as next_timer_interrupt() did not check hrtimer
tree for next event.

Function next_timer_interrupt() is needed with dyntick (CONFIG_NO_IDLE_HZ,
VST) implementations, as the system can be in idle when next hrtimer event
was supposed to happen.  At least ARM and S390 currently use
next_timer_interrupt().

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Tony Lindgren
2006-03-06 15:42:45 -08:00
committed by Linus Torvalds
parent f7c09bd972
commit 69239749e1
4 changed files with 61 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
arch/arm/kernel/time.c
View File

@@ -422,12 +422,14 @@ static int timer_dyn_tick_disable(void)
void timer_dyn_reprogram(void)
{
struct dyn_tick_timer *dyn_tick = system_timer->dyn_tick;
unsigned long next, seq;
if (dyn_tick) {
write_seqlock(&xtime_lock);
if (dyn_tick->state & DYN_TICK_ENABLED)
if (dyn_tick && (dyn_tick->state & DYN_TICK_ENABLED)) {
next = next_timer_interrupt();
do {
seq = read_seqbegin(&xtime_lock);
dyn_tick->reprogram(next_timer_interrupt() - jiffies);
write_sequnlock(&xtime_lock);
} while (read_seqretry(&xtime_lock, seq));
}
}