diff options
Diffstat (limited to 'arch/alpha/kernel/time.c')
-rw-r--r-- | arch/alpha/kernel/time.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/arch/alpha/kernel/time.c b/arch/alpha/kernel/time.c index 7c1e44420a78..581ddcc22fc5 100644 --- a/arch/alpha/kernel/time.c +++ b/arch/alpha/kernel/time.c | |||
@@ -54,8 +54,6 @@ | |||
54 | #include "proto.h" | 54 | #include "proto.h" |
55 | #include "irq_impl.h" | 55 | #include "irq_impl.h" |
56 | 56 | ||
57 | extern unsigned long wall_jiffies; /* kernel/timer.c */ | ||
58 | |||
59 | static int set_rtc_mmss(unsigned long); | 57 | static int set_rtc_mmss(unsigned long); |
60 | 58 | ||
61 | DEFINE_SPINLOCK(rtc_lock); | 59 | DEFINE_SPINLOCK(rtc_lock); |
@@ -413,7 +411,7 @@ void | |||
413 | do_gettimeofday(struct timeval *tv) | 411 | do_gettimeofday(struct timeval *tv) |
414 | { | 412 | { |
415 | unsigned long flags; | 413 | unsigned long flags; |
416 | unsigned long sec, usec, lost, seq; | 414 | unsigned long sec, usec, seq; |
417 | unsigned long delta_cycles, delta_usec, partial_tick; | 415 | unsigned long delta_cycles, delta_usec, partial_tick; |
418 | 416 | ||
419 | do { | 417 | do { |
@@ -423,14 +421,13 @@ do_gettimeofday(struct timeval *tv) | |||
423 | sec = xtime.tv_sec; | 421 | sec = xtime.tv_sec; |
424 | usec = (xtime.tv_nsec / 1000); | 422 | usec = (xtime.tv_nsec / 1000); |
425 | partial_tick = state.partial_tick; | 423 | partial_tick = state.partial_tick; |
426 | lost = jiffies - wall_jiffies; | ||
427 | 424 | ||
428 | } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); | 425 | } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); |
429 | 426 | ||
430 | #ifdef CONFIG_SMP | 427 | #ifdef CONFIG_SMP |
431 | /* Until and unless we figure out how to get cpu cycle counters | 428 | /* Until and unless we figure out how to get cpu cycle counters |
432 | in sync and keep them there, we can't use the rpcc tricks. */ | 429 | in sync and keep them there, we can't use the rpcc tricks. */ |
433 | delta_usec = lost * (1000000 / HZ); | 430 | delta_usec = 0; |
434 | #else | 431 | #else |
435 | /* | 432 | /* |
436 | * usec = cycles * ticks_per_cycle * 2**48 * 1e6 / (2**48 * ticks) | 433 | * usec = cycles * ticks_per_cycle * 2**48 * 1e6 / (2**48 * ticks) |
@@ -446,8 +443,7 @@ do_gettimeofday(struct timeval *tv) | |||
446 | */ | 443 | */ |
447 | 444 | ||
448 | delta_usec = (delta_cycles * state.scaled_ticks_per_cycle | 445 | delta_usec = (delta_cycles * state.scaled_ticks_per_cycle |
449 | + partial_tick | 446 | + partial_tick) * 15625; |
450 | + (lost << FIX_SHIFT)) * 15625; | ||
451 | delta_usec = ((delta_usec / ((1UL << (FIX_SHIFT-6-1)) * HZ)) + 1) / 2; | 447 | delta_usec = ((delta_usec / ((1UL << (FIX_SHIFT-6-1)) * HZ)) + 1) / 2; |
452 | #endif | 448 | #endif |
453 | 449 | ||
@@ -480,12 +476,11 @@ do_settimeofday(struct timespec *tv) | |||
480 | time. Without this, a full-tick error is possible. */ | 476 | time. Without this, a full-tick error is possible. */ |
481 | 477 | ||
482 | #ifdef CONFIG_SMP | 478 | #ifdef CONFIG_SMP |
483 | delta_nsec = (jiffies - wall_jiffies) * (NSEC_PER_SEC / HZ); | 479 | delta_nsec = 0; |
484 | #else | 480 | #else |
485 | delta_nsec = rpcc() - state.last_time; | 481 | delta_nsec = rpcc() - state.last_time; |
486 | delta_nsec = (delta_nsec * state.scaled_ticks_per_cycle | 482 | delta_nsec = (delta_nsec * state.scaled_ticks_per_cycle |
487 | + state.partial_tick | 483 | + state.partial_tick) * 15625; |
488 | + ((jiffies - wall_jiffies) << FIX_SHIFT)) * 15625; | ||
489 | delta_nsec = ((delta_nsec / ((1UL << (FIX_SHIFT-6-1)) * HZ)) + 1) / 2; | 484 | delta_nsec = ((delta_nsec / ((1UL << (FIX_SHIFT-6-1)) * HZ)) + 1) / 2; |
490 | delta_nsec *= 1000; | 485 | delta_nsec *= 1000; |
491 | #endif | 486 | #endif |