linux-kernel - [tip:x86/apic] x86/apic: Provide default send single IPI wrapper

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Date:	Thu, 5 Nov 2015 06:46:31 -0800
From:	tip-bot for Thomas Gleixner <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	daniel@...ascale.com, peterz@...radead.org, mingo@...nel.org,
	torvalds@...ux-foundation.org, bp@...en.de,
	linux-kernel@...r.kernel.org, tglx@...utronix.de, travis@....com,
	hpa@...or.com
Subject: [tip:x86/apic] x86/apic: Provide default send single IPI wrapper

Commit-ID:  7e29393b20a1a863a5f9bf48dc71e5cff4035ff5
Gitweb:     http://git.kernel.org/tip/7e29393b20a1a863a5f9bf48dc71e5cff4035ff5
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Wed, 4 Nov 2015 22:57:07 +0000
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 5 Nov 2015 13:07:53 +0100

x86/apic: Provide default send single IPI wrapper

Instead of doing the wrapping in the smp code we can provide a default
wrapper for those APICs which insist on cpumasks.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Ingo Molnar <mingo@...nel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Borislav Petkov <bp@...en.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Mike Travis <travis@....com>
Cc: Daniel J Blueman <daniel@...ascale.com>
Link: http://lkml.kernel.org/r/20151104220849.631111846@linutronix.de
---
 arch/x86/include/asm/ipi.h | 1 +
 arch/x86/kernel/apic/ipi.c | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/arch/x86/include/asm/ipi.h b/arch/x86/include/asm/ipi.h
index 22998a8..cfc9a0d 100644
--- a/arch/x86/include/asm/ipi.h
+++ b/arch/x86/include/asm/ipi.h
@@ -119,6 +119,7 @@ static inline void
 	native_apic_mem_write(APIC_ICR, cfg);
 }
 
+extern void default_send_IPI_single(int cpu, int vector);
 extern void default_send_IPI_single_phys(int cpu, int vector);
 extern void default_send_IPI_mask_sequence_phys(const struct cpumask *mask,
 						 int vector);
diff --git a/arch/x86/kernel/apic/ipi.c b/arch/x86/kernel/apic/ipi.c
index 4fcffbf..eb45fc9 100644
--- a/arch/x86/kernel/apic/ipi.c
+++ b/arch/x86/kernel/apic/ipi.c
@@ -65,6 +65,14 @@ void default_send_IPI_mask_allbutself_phys(const struct cpumask *mask,
 	local_irq_restore(flags);
 }
 
+/*
+ * Helper function for APICs which insist on cpumasks
+ */
+void default_send_IPI_single(int cpu, int vector)
+{
+	apic->send_IPI_mask(cpumask_of(cpu), vector);
+}
+
 #ifdef CONFIG_X86_32
 
 void default_send_IPI_mask_sequence_logical(const struct cpumask *mask,
--
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