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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 09:46:15 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 09:46:15 -0700 |
| commit | 31bbb9b58d1e8ebcf2b28c95c2250a9f8e31e397 (patch) | |
| tree | 6bb0c0490d66d32eca43e73abb28d8b3ab0e7b91 /arch/powerpc | |
| parent | ff830b8e5f999d1ccbd0282a666520f0b557daa4 (diff) | |
| parent | 3f0a525ebf4b8ef041a332bbe4a73aee94bb064b (diff) | |
| download | kernel_samsung_tuna-31bbb9b58d1e8ebcf2b28c95c2250a9f8e31e397.zip kernel_samsung_tuna-31bbb9b58d1e8ebcf2b28c95c2250a9f8e31e397.tar.gz kernel_samsung_tuna-31bbb9b58d1e8ebcf2b28c95c2250a9f8e31e397.tar.bz2 | |
Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
itimers: Add tracepoints for itimer
hrtimer: Add tracepoint for hrtimers
timers: Add tracepoints for timer_list timers
cputime: Optimize jiffies_to_cputime(1)
itimers: Simplify arm_timer() code a bit
itimers: Fix periodic tics precision
itimers: Merge ITIMER_VIRT and ITIMER_PROF
Trivial header file include conflicts in kernel/fork.c
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/cputime.h | 13 | ||||
| -rw-r--r-- | arch/powerpc/kernel/time.c | 4 |
2 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/cputime.h b/arch/powerpc/include/asm/cputime.h index f42e623..fa19f3f 100644 --- a/arch/powerpc/include/asm/cputime.h +++ b/arch/powerpc/include/asm/cputime.h @@ -18,6 +18,9 @@ #ifndef CONFIG_VIRT_CPU_ACCOUNTING #include <asm-generic/cputime.h> +#ifdef __KERNEL__ +static inline void setup_cputime_one_jiffy(void) { } +#endif #else #include <linux/types.h> @@ -49,6 +52,11 @@ typedef u64 cputime64_t; #ifdef __KERNEL__ /* + * One jiffy in timebase units computed during initialization + */ +extern cputime_t cputime_one_jiffy; + +/* * Convert cputime <-> jiffies */ extern u64 __cputime_jiffies_factor; @@ -89,6 +97,11 @@ static inline cputime_t jiffies_to_cputime(const unsigned long jif) return ct; } +static inline void setup_cputime_one_jiffy(void) +{ + cputime_one_jiffy = jiffies_to_cputime(1); +} + static inline cputime64_t jiffies64_to_cputime64(const u64 jif) { cputime_t ct; diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index df45a74..92dc844 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -193,6 +193,8 @@ EXPORT_SYMBOL(__cputime_clockt_factor); DEFINE_PER_CPU(unsigned long, cputime_last_delta); DEFINE_PER_CPU(unsigned long, cputime_scaled_last_delta); +cputime_t cputime_one_jiffy; + static void calc_cputime_factors(void) { struct div_result res; @@ -501,6 +503,7 @@ static int __init iSeries_tb_recal(void) tb_to_xs = divres.result_low; vdso_data->tb_ticks_per_sec = tb_ticks_per_sec; vdso_data->tb_to_xs = tb_to_xs; + setup_cputime_one_jiffy(); } else { printk( "Titan recalibrate: FAILED (difference > 4 percent)\n" @@ -960,6 +963,7 @@ void __init time_init(void) tb_ticks_per_usec = ppc_tb_freq / 1000000; tb_to_us = mulhwu_scale_factor(ppc_tb_freq, 1000000); calc_cputime_factors(); + setup_cputime_one_jiffy(); /* * Calculate the length of each tick in ns. It will not be |