From: Frederic Weisbecker <fweisbec@gmail.com>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Dave Jones <davej@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Russell King <linux@arm.linux.org.uk>,
Catalin Iacob <iacobcatalin@gmail.com>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Will Deacon <will.deacon@arm.com>, Ingo Molnar <mingo@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>
Subject: [PATCH 5/8] arm: Tell irq work about self IPI support
Date: Wed, 10 Sep 2014 23:33:25 +0200 [thread overview]
Message-ID: <1410384808-14760-6-git-send-email-fweisbec@gmail.com> (raw)
In-Reply-To: <1410384808-14760-1-git-send-email-fweisbec@gmail.com>
ARM irq work IPI support depends on SMP support. That information is
partly known at early boottime. Lets implement
arch_irq_work_has_interrupt() accordingly.
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
---
arch/arm/include/asm/Kbuild | 1 -
arch/arm/include/asm/irq_work.h | 11 +++++++++++
arch/arm/kernel/smp.c | 2 +-
3 files changed, 12 insertions(+), 2 deletions(-)
create mode 100644 arch/arm/include/asm/irq_work.h
diff --git a/arch/arm/include/asm/Kbuild b/arch/arm/include/asm/Kbuild
index 202905e..70cd84e 100644
--- a/arch/arm/include/asm/Kbuild
+++ b/arch/arm/include/asm/Kbuild
@@ -11,7 +11,6 @@ generic-y += hash.h
generic-y += ioctl.h
generic-y += ipcbuf.h
generic-y += irq_regs.h
-generic-y += irq_work.h
generic-y += kdebug.h
generic-y += local.h
generic-y += local64.h
diff --git a/arch/arm/include/asm/irq_work.h b/arch/arm/include/asm/irq_work.h
new file mode 100644
index 0000000..712d03e
--- /dev/null
+++ b/arch/arm/include/asm/irq_work.h
@@ -0,0 +1,11 @@
+#ifndef __ASM_ARM_IRQ_WORK_H
+#define __ASM_ARM_IRQ_WORK_H
+
+#include <asm/smp_plat.h>
+
+static inline bool arch_irq_work_has_interrupt(void)
+{
+ return is_smp();
+}
+
+#endif /* _ASM_ARM_IRQ_WORK_H */
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 9388a3d..bbe22fc 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -503,7 +503,7 @@ void arch_send_call_function_single_ipi(int cpu)
#ifdef CONFIG_IRQ_WORK
void arch_irq_work_raise(void)
{
- if (is_smp())
+ if (arch_irq_work_has_interrupt())
smp_cross_call(cpumask_of(smp_processor_id()), IPI_IRQ_WORK);
}
#endif
--
2.1.0
next prev parent reply other threads:[~2014-09-10 21:34 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-10 21:33 [PATCH 0/8] nohz: Fix nohz kick irq work on tick v2 Frederic Weisbecker
2014-09-10 21:33 ` [PATCH 1/8] nohz: Move nohz full init call to tick init Frederic Weisbecker
2014-09-10 21:33 ` [PATCH 2/8] irq_work: Introduce arch_irq_work_has_interrupt() Frederic Weisbecker
2014-09-10 21:33 ` [PATCH 3/8] irq_work: Force raised irq work to run on irq work interrupt Frederic Weisbecker
2014-09-10 21:33 ` [PATCH 4/8] x86: Tell irq work about self IPI support Frederic Weisbecker
2014-09-10 21:33 ` Frederic Weisbecker [this message]
2014-09-10 21:33 ` [PATCH 6/8] arm64: " Frederic Weisbecker
2014-09-11 9:00 ` Catalin Marinas
2014-09-13 16:47 ` Frederic Weisbecker
2014-09-10 21:33 ` [PATCH 7/8] nohz: Consolidate nohz full init code Frederic Weisbecker
2014-09-10 21:33 ` [PATCH 8/8] nohz: nohz full depends on irq work self IPI support Frederic Weisbecker
2014-09-11 8:28 ` [PATCH 0/8] nohz: Fix nohz kick irq work on tick v2 Peter Zijlstra
2014-09-12 18:05 ` Frederic Weisbecker
2014-09-12 19:00 ` Peter Zijlstra
-- strict thread matches above, loose matches on Subject: below --
2014-09-20 20:30 [PATCH 0/8] nohz: Fix nohz kick irq work on tick v3 Frederic Weisbecker
2014-09-20 20:30 ` [PATCH 5/8] arm: Tell irq work about self IPI support Frederic Weisbecker
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1410384808-14760-6-git-send-email-fweisbec@gmail.com \
--to=fweisbec@gmail.com \
--cc=catalin.marinas@arm.com \
--cc=davej@redhat.com \
--cc=iacobcatalin@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@arm.linux.org.uk \
--cc=mingo@kernel.org \
--cc=paulmck@linux.vnet.ibm.com \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=will.deacon@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).