diff options
| author | Jeff Dike <jdike@addtoit.com> | 2007-02-10 01:44:12 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-11 10:51:22 -0800 |
| commit | 490ba1714b31a131cdc6318231aa227d19bf0761 (patch) | |
| tree | e00ccf9e10d0cbcc49efb0c09c699ae25dd4efea /arch/um/kernel/time.c | |
| parent | c0961c1804c46bf5bb253e1bd6bc93e4627b79a1 (diff) | |
[PATCH] uml: make time data per-cpu
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>
Diffstat (limited to 'arch/um/kernel/time.c')
| -rw-r--r-- | arch/um/kernel/time.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c index 2e354b3ca060..b1f8b0752419 100644 --- a/arch/um/kernel/time.c +++ b/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) |