The patch titled
uml: make time data per-cpu
has been removed from the -mm tree. Its filename was
uml-make-time-data-per-cpu.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: uml: make time data per-cpu
From: Jeff Dike <jdike@xxxxxxxxxxx>
prev_nsecs and delta need to be arrays, and indexed by CPU number.
Signed-off-by: Jeff Dike <jdike@xxxxxxxxxxx>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/um/kernel/time.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
diff -puN arch/um/kernel/time.c~uml-make-time-data-per-cpu arch/um/kernel/time.c
--- a/arch/um/kernel/time.c~uml-make-time-data-per-cpu
+++ a/arch/um/kernel/time.c
@@ -35,31 +35,31 @@ unsigned long long sched_clock(void)
return (unsigned long long)jiffies_64 * (1000000000 / HZ);
}
-static unsigned long long prev_nsecs;
+static unsigned long long prev_nsecs[NR_CPUS];
#ifdef CONFIG_UML_REAL_TIME_CLOCK
-static long long delta; /* Deviation per interval */
+static long long delta[NR_CPUS]; /* Deviation per interval */
#endif
void timer_irq(union uml_pt_regs *regs)
{
unsigned long long ticks = 0;
-
#ifdef CONFIG_UML_REAL_TIME_CLOCK
- if(prev_nsecs){
+ int c = cpu();
+ if(prev_nsecs[c]){
/* We've had 1 tick */
unsigned long long nsecs = os_nsecs();
- delta += nsecs - prev_nsecs;
- prev_nsecs = nsecs;
+ delta[c] += nsecs - prev_nsecs[c];
+ prev_nsecs[c] = nsecs;
/* Protect against the host clock being set backwards */
- if(delta < 0)
- delta = 0;
+ if(delta[c] < 0)
+ delta[c] = 0;
- ticks += (delta * HZ) / BILLION;
- delta -= (ticks * BILLION) / HZ;
+ ticks += (delta[c] * HZ) / BILLION;
+ delta[c] -= (ticks * BILLION) / HZ;
}
- else prev_nsecs = os_nsecs();
+ else prev_nsecs[c] = os_nsecs();
#else
ticks = 1;
#endif
@@ -69,8 +69,8 @@ void timer_irq(union uml_pt_regs *regs)
}
}
+/* Protects local_offset */
static DEFINE_SPINLOCK(timer_spinlock);
-
static unsigned long long local_offset = 0;
static inline unsigned long long get_time(void)
_
Patches currently in -mm which might be from jdike@xxxxxxxxxxx are
origin.patch
uml-fix-prototypes.patch
dynamic-kernel-command-line-common.patch
dynamic-kernel-command-line-um.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
