linux-kernel - [RFC PATCH v2 02/25] smp, alpha: kill SMP single function call interrupt

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Message-Id: <1378915649-16395-3-git-send-email-liuj97@gmail.com>
Date:	Thu, 12 Sep 2013 00:07:06 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Richard Henderson <rth@...ddle.net>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Matt Turner <mattst88@...il.com>, Shaohua Li <shli@...nel.org>
Cc:	liuj97@...il.com, Jiang Liu <jiang.liu@...wei.com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Steven Rostedt <rostedt@...dmis.org>,
	Jiri Kosina <trivial@...nel.org>,
	Wang YanQing <udknight@...il.com>, linux-alpha@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: [RFC PATCH v2 02/25] smp, alpha: kill SMP single function call interrupt

From: Jiang Liu <jiang.liu@...wei.com>

Commit 9a46ad6d6df3b54 "smp: make smp_call_function_many() use logic
similar to smp_call_function_single()" has unified the way to handle
single and multiple cross-CPU function calls. Now only one interrupt
is needed for architecture specific code to support generic SMP function
call interfaces, so kill the redundant single function call interrupt.

Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
Cc: Jiang Liu <liuj97@...il.com>
---
 arch/alpha/kernel/smp.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c
index 9dbbcb3..71d5c7d 100644
--- a/arch/alpha/kernel/smp.c
+++ b/arch/alpha/kernel/smp.c
@@ -63,7 +63,6 @@ static struct {
 enum ipi_message_type {
 	IPI_RESCHEDULE,
 	IPI_CALL_FUNC,
-	IPI_CALL_FUNC_SINGLE,
 	IPI_CPU_STOP,
 };
 
@@ -498,7 +497,6 @@ smp_cpus_done(unsigned int max_cpus)
 	       ((bogosum + 2500) / (5000/HZ)) % 100);
 }
 
-.
 void
 smp_percpu_timer_interrupt(struct pt_regs *regs)
 {
@@ -533,7 +531,6 @@ setup_profiling_timer(unsigned int multiplier)
 	return -EINVAL;
 }
 
-.
 static void
 send_ipi_message(const struct cpumask *to_whom, enum ipi_message_type operation)
 {
@@ -579,10 +576,6 @@ handle_ipi(struct pt_regs *regs)
 			generic_smp_call_function_interrupt();
 			break;
 
-		case IPI_CALL_FUNC_SINGLE:
-			generic_smp_call_function_single_interrupt();
-			break;
-
 		case IPI_CPU_STOP:
 			halt();
 
@@ -633,7 +626,7 @@ void arch_send_call_function_ipi_mask(const struct cpumask *mask)
 
 void arch_send_call_function_single_ipi(int cpu)
 {
-	send_ipi_message(cpumask_of(cpu), IPI_CALL_FUNC_SINGLE);
+	send_ipi_message(cpumask_of(cpu), IPI_CALL_FUNC);
 }
 
 static void
-- 
1.8.1.2

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