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Date: Mon, 31 Oct 2016 13:36:26 +0100 From: Stanislaw Gruszka <sgruszka@...hat.com> To: linux-kernel@...r.kernel.org Cc: Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>, Frederic Weisbecker <fweisbec@...il.com>, Paul Mackerras <paulus@...ba.org>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Michael Neuling <mikey@...ling.org>, linuxppc-dev@...ts.ozlabs.org, Martin Schwidefsky <schwidefsky@...ibm.com>, Heiko Carstens <heiko.carstens@...ibm.com>, linux-s390@...r.kernel.org, Stanislaw Gruszka <sgruszka@...hat.com> Subject: [PATCH 1/4] cputime/powerpc: remove cputime_last_delta global variable Since commit: cf9efce0ce313 ("powerpc: Account time using timebase rather than PURR") cputime_last_delta is not initialized to other value than 0, hence it's not used except zero check and cputime_to_scaled() just returns the argument. Signed-off-by: Stanislaw Gruszka <sgruszka@...hat.com> --- arch/powerpc/include/asm/cputime.h | 7 ------- arch/powerpc/kernel/time.c | 2 -- 2 files changed, 0 insertions(+), 9 deletions(-) diff --git a/arch/powerpc/include/asm/cputime.h b/arch/powerpc/include/asm/cputime.h index 4f60db0..9f5dcf7 100644 --- a/arch/powerpc/include/asm/cputime.h +++ b/arch/powerpc/include/asm/cputime.h @@ -46,8 +46,6 @@ static inline void setup_cputime_one_jiffy(void) { } * Convert cputime <-> jiffies */ extern u64 __cputime_jiffies_factor; -DECLARE_PER_CPU(unsigned long, cputime_last_delta); -DECLARE_PER_CPU(unsigned long, cputime_scaled_last_delta); static inline unsigned long cputime_to_jiffies(const cputime_t ct) { @@ -58,11 +56,6 @@ static inline unsigned long cputime_to_jiffies(const cputime_t ct) * the last scaled to real ratio */ static inline cputime_t cputime_to_scaled(const cputime_t ct) { - if (cpu_has_feature(CPU_FTR_SPURR) && - __this_cpu_read(cputime_last_delta)) - return (__force u64) ct * - __this_cpu_read(cputime_scaled_last_delta) / - __this_cpu_read(cputime_last_delta); return ct; } diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index bc3f7d0..8105198 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -164,8 +164,6 @@ struct clock_event_device decrementer_clockevent = { EXPORT_SYMBOL(__cputime_sec_factor); u64 __cputime_clockt_factor; 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; -- 1.7.1
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