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[PATCH] uml: make time data per-cpu

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prev_nsecs and delta need to be arrays, and indexed by CPU number.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jeff Dike 2007-02-10 01:44:12 -08:00 committed by Linus Torvalds
parent c0961c1804
commit 490ba1714b
1 changed files with 12 additions and 12 deletions
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24
arch/um/kernel/time.c
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@ -35,31 +35,31 @@ unsigned long long sched_clock(void)
return (unsigned long long)jiffies_64 * (1000000000 / HZ); 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 #ifdef CONFIG_UML_REAL_TIME_CLOCK
static long long delta; /* Deviation per interval */ static long long delta[NR_CPUS]; /* Deviation per interval */
#endif #endif
void timer_irq(union uml_pt_regs *regs) void timer_irq(union uml_pt_regs *regs)
{ {
unsigned long long ticks = 0; unsigned long long ticks = 0;
#ifdef CONFIG_UML_REAL_TIME_CLOCK #ifdef CONFIG_UML_REAL_TIME_CLOCK
if(prev_nsecs){ int c = cpu();
if(prev_nsecs[c]){
/* We've had 1 tick */ /* We've had 1 tick */
unsigned long long nsecs = os_nsecs(); unsigned long long nsecs = os_nsecs();
delta += nsecs - prev_nsecs; delta[c] += nsecs - prev_nsecs[c];
prev_nsecs = nsecs; prev_nsecs[c] = nsecs;
/* Protect against the host clock being set backwards */ /* Protect against the host clock being set backwards */
if(delta < 0) if(delta[c] < 0)
delta = 0; delta[c] = 0;
ticks += (delta * HZ) / BILLION; ticks += (delta[c] * HZ) / BILLION;
delta -= (ticks * BILLION) / HZ; delta[c] -= (ticks * BILLION) / HZ;
} }
else prev_nsecs = os_nsecs(); else prev_nsecs[c] = os_nsecs();
#else #else
ticks = 1; ticks = 1;
#endif #endif
@ -69,8 +69,8 @@ void timer_irq(union uml_pt_regs *regs)
} }
} }
/* Protects local_offset */
static DEFINE_SPINLOCK(timer_spinlock); static DEFINE_SPINLOCK(timer_spinlock);
static unsigned long long local_offset = 0; static unsigned long long local_offset = 0;
static inline unsigned long long get_time(void) static inline unsigned long long get_time(void)