diff options
author | john stultz <johnstul@us.ibm.com> | 2009-09-16 04:17:19 (GMT) |
---|---|---|
committer | Mike Frysinger <vapier@gentoo.org> | 2009-10-07 08:36:20 (GMT) |
commit | 10f03f1a249df01ec760e3494298510efad3271f (patch) | |
tree | c2558955c9b51834648887828d9ecfe0f3a74527 | |
parent | 0eca52a92735f43462165efe00a7e394345fb38e (diff) | |
download | linux-fsl-qoriq-10f03f1a249df01ec760e3494298510efad3271f.tar.xz |
Blackfin: convert to use arch_gettimeoffset()
Convert Blackfin to use GENERIC_TIME via the arch_getoffset()
infrastructure, reducing the amount of arch specific code we need to
maintain.
I've taken my best swing at converting this, but I'm not 100% confident
I got it right. My cross-compiler is now out of date (gcc4.2) so I
wasn't able to check if it compiled. Any assistance from arch
maintainers or testers to get this merged would be great.
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
-rw-r--r-- | arch/blackfin/Kconfig | 10 | ||||
-rw-r--r-- | arch/blackfin/kernel/time.c | 63 |
2 files changed, 8 insertions, 65 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index 9a01d44..e519882 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -229,7 +229,7 @@ endchoice config SMP depends on BF561 - select GENERIC_TIME + select GENERIC_CLOCKEVENTS bool "Symmetric multi-processing support" ---help--- This enables support for systems with more than one CPU, @@ -613,12 +613,10 @@ comment "Kernel Timer/Scheduler" source kernel/Kconfig.hz config GENERIC_TIME - bool "Generic time" - default y + def_bool y config GENERIC_CLOCKEVENTS bool "Generic clock events" - depends on GENERIC_TIME default y choice @@ -653,6 +651,10 @@ config GPTMR0_CLOCKSOURCE depends on GENERIC_CLOCKEVENTS depends on !TICKSOURCE_GPTMR0 +config ARCH_USES_GETTIMEOFFSET + depends on !GENERIC_CLOCKEVENTS + def_bool y + source kernel/time/Kconfig comment "Misc" diff --git a/arch/blackfin/kernel/time.c b/arch/blackfin/kernel/time.c index adb54aa..e5069fe 100644 --- a/arch/blackfin/kernel/time.c +++ b/arch/blackfin/kernel/time.c @@ -81,11 +81,11 @@ time_sched_init(irqreturn_t(*timer_routine) (int, void *)) #endif } +#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET /* * Should return useconds since last timer tick */ -#ifndef CONFIG_GENERIC_TIME -static unsigned long gettimeoffset(void) +u32 arch_gettimeoffset(void) { unsigned long offset; unsigned long clocks_per_jiffy; @@ -184,65 +184,6 @@ void __init time_init(void) time_sched_init(timer_interrupt); } -#ifndef CONFIG_GENERIC_TIME -void do_gettimeofday(struct timeval *tv) -{ - unsigned long flags; - unsigned long seq; - unsigned long usec, sec; - - do { - seq = read_seqbegin_irqsave(&xtime_lock, flags); - usec = gettimeoffset(); - sec = xtime.tv_sec; - usec += (xtime.tv_nsec / NSEC_PER_USEC); - } - while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); - - while (usec >= USEC_PER_SEC) { - usec -= USEC_PER_SEC; - sec++; - } - - tv->tv_sec = sec; - tv->tv_usec = usec; -} -EXPORT_SYMBOL(do_gettimeofday); - -int do_settimeofday(struct timespec *tv) -{ - time_t wtm_sec, sec = tv->tv_sec; - long wtm_nsec, nsec = tv->tv_nsec; - - if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC) - return -EINVAL; - - write_seqlock_irq(&xtime_lock); - /* - * This is revolting. We need to set the xtime.tv_usec - * correctly. However, the value in this location is - * is value at the last tick. - * Discover what correction gettimeofday - * would have done, and then undo it! - */ - nsec -= (gettimeoffset() * NSEC_PER_USEC); - - wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec); - wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec); - - set_normalized_timespec(&xtime, sec, nsec); - set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec); - - ntp_clear(); - - write_sequnlock_irq(&xtime_lock); - clock_was_set(); - - return 0; -} -EXPORT_SYMBOL(do_settimeofday); -#endif /* !CONFIG_GENERIC_TIME */ - /* * Scheduler clock - returns current time in nanosec units. */ |