Commit-ID: 0f6f47bacba514f4e9f61de0d85940dfb41498cc Gitweb: https://git.kernel.org/tip/0f6f47bacba514f4e9f61de0d85940dfb41498cc Author: Frederic Weisbecker <frederic@xxxxxxxxxx> AuthorDate: Tue, 8 May 2018 15:38:19 +0200 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Mon, 14 May 2018 11:25:27 +0200 softirq/core: Turn default irq_cpustat_t to standard per-cpu In order to optimize and consolidate softirq mask accesses, let's convert the default irq_cpustat_t implementation to per-CPU standard API. Signed-off-by: Frederic Weisbecker <frederic@xxxxxxxxxx> Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Acked-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Cc: David S. Miller <davem@xxxxxxxxxxxxx> Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx> Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx> Cc: Helge Deller <deller@xxxxxx> Cc: James E.J. Bottomley <jejb@xxxxxxxxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx> Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxx> Cc: Rich Felker <dalias@xxxxxxxx> Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> Cc: Tony Luck <tony.luck@xxxxxxxxx> Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/1525786706-22846-5-git-send-email-frederic@xxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- include/linux/irq_cpustat.h | 4 ++-- kernel/softirq.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/include/linux/irq_cpustat.h b/include/linux/irq_cpustat.h index 4954948d1973..ddea03c7c39d 100644 --- a/include/linux/irq_cpustat.h +++ b/include/linux/irq_cpustat.h @@ -18,8 +18,8 @@ */ #ifndef __ARCH_IRQ_STAT -extern irq_cpustat_t irq_stat[]; /* defined in asm/hardirq.h */ -#define __IRQ_STAT(cpu, member) (irq_stat[cpu].member) +DECLARE_PER_CPU_ALIGNED(irq_cpustat_t, irq_stat); /* defined in asm/hardirq.h */ +#define __IRQ_STAT(cpu, member) (per_cpu(irq_stat.member, cpu)) #endif /* arch independent irq_stat fields */ diff --git a/kernel/softirq.c b/kernel/softirq.c index 177de3640c78..c5fafd792df1 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -49,8 +49,8 @@ */ #ifndef __ARCH_IRQ_STAT -irq_cpustat_t irq_stat[NR_CPUS] ____cacheline_aligned; -EXPORT_SYMBOL(irq_stat); +DEFINE_PER_CPU_ALIGNED(irq_cpustat_t, irq_stat); +EXPORT_PER_CPU_SYMBOL(irq_stat); #endif static struct softirq_action softirq_vec[NR_SOFTIRQS] __cacheline_aligned_in_smp; -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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