From: Frederic Weisbecker <fweisbec@gmail.com>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Steven Rostedt <rostedt@goodmis.org>,
Paul Gortmaker <paul.gortmaker@windriver.com>
Subject: [RFC PATCH 3/8] x86: Implement arch_irq_work_has_ipi()
Date: Sat, 20 Oct 2012 12:22:42 -0400 [thread overview]
Message-ID: <1350750167-14263-4-git-send-email-fweisbec@gmail.com> (raw)
In-Reply-To: <1350750167-14263-1-git-send-email-fweisbec@gmail.com>
Most of the time, x86 can trigger self-IPIs. Tell
irq work subsystem about it.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
---
arch/x86/include/asm/irq_work.h | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/irq_work.h b/arch/x86/include/asm/irq_work.h
index dad8266..c7489cd 100644
--- a/arch/x86/include/asm/irq_work.h
+++ b/arch/x86/include/asm/irq_work.h
@@ -2,8 +2,12 @@
#define _ASM_X86_IRQ_WORK_H
#ifdef CONFIG_X86_LOCAL_APIC
+#include <asm/cpufeature.h>
+
extern void __arch_irq_work_raise(void);
#define arch_irq_work_raise __arch_irq_work_raise
+
+#define arch_irq_work_has_ipi() (cpu_has_apic)
#endif
#include <asm-generic/irq_work.h>
--
1.7.5.4
next prev parent reply other threads:[~2012-10-20 16:23 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-20 16:22 [RFC PATCH 0/8] printk: Make it usable on nohz CPUs v2 Frederic Weisbecker
2012-10-20 16:22 ` [RFC PATCH 1/8] irq_work: Move irq_work_raise() declaration/default definition to arch headers Frederic Weisbecker
2012-10-20 16:22 ` [RFC PATCH 2/8] irq_work: Let the arch tell us about self-IPI support Frederic Weisbecker
2012-10-20 16:22 ` Frederic Weisbecker [this message]
2012-10-20 16:22 ` [RFC PATCH 4/8] nohz: Add API to check tick state Frederic Weisbecker
2012-10-20 16:22 ` [RFC PATCH 5/8] irq_work: Make self-IPIs optable Frederic Weisbecker
2012-10-22 10:41 ` Peter Zijlstra
2012-10-23 12:34 ` Frederic Weisbecker
2012-10-20 16:22 ` [RFC PATCH 6/8] irq_work: Handle queuing without IPI support in dyntick idle mode Frederic Weisbecker
2012-10-20 16:22 ` [RFC PATCH 7/8] irq_work: Remove CONFIG_HAVE_IRQ_WORK Frederic Weisbecker
2012-10-20 16:22 ` [RFC PATCH 8/8] printk: Wake up klogd using irq_work Frederic Weisbecker
2012-10-20 16:50 ` Joe Perches
2012-10-20 17:21 ` Frederic Weisbecker
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