linux-kernel - [RFC v1 01/28] x86, irq: Kill unused setup_timer_IRQ0

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Message-Id: <1411743478-31435-2-git-send-email-jiang.liu@linux.intel.com>
Date:	Fri, 26 Sep 2014 22:57:31 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Yinghai Lu <yinghai@...nel.org>,
	Borislav Petkov <bp@...en8.de>,
	Grant Likely <grant.likely@...aro.org>
Cc:	Jiang Liu <jiang.liu@...ux.intel.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tony Luck <tony.luck@...el.com>,
	Joerg Roedel <joro@...tes.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: [RFC v1 01/28] x86, irq: Kill unused setup_timer_IRQ0_pin()

Now there's no user of setup_timer_IRQ0_pin(), so kill it.

Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
---
Hi all,
	This patch depends on Thomas' work to remove the last caller of
setup_timer_IRQ0_pin(). So the "#if 0" is intended, so it won't block
following up patches.
Regards!
Gerry
---
 arch/x86/include/asm/io_apic.h          |    1 -
 arch/x86/kernel/apic/io_apic.c          |   17 -----------------
 arch/x86/platform/intel-mid/intel-mid.c |    2 ++
 3 files changed, 2 insertions(+), 18 deletions(-)

diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index 7bf86bfe05b1..f9a99bc28981 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -204,7 +204,6 @@ extern int mp_irqdomain_map(struct irq_domain *domain, unsigned int virq,
 			    irq_hw_number_t hwirq);
 extern void mp_irqdomain_unmap(struct irq_domain *domain, unsigned int virq);
 extern int mp_set_gsi_attr(u32 gsi, int trigger, int polarity, int node);
-extern void __init pre_init_apic_IRQ0(void);
 
 extern void mp_save_irq(struct mpc_intsrc *m);
 extern bool mp_should_keep_irq(struct device *dev);
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 37796fcd33e2..5cccf8989507 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3091,20 +3091,3 @@ bool mp_should_keep_irq(struct device *dev)
 
 	return false;
 }
-
-/* Enable IOAPIC early just for system timer */
-void __init pre_init_apic_IRQ0(void)
-{
-	struct io_apic_irq_attr attr = { 0, 0, 0, 0 };
-
-	printk(KERN_INFO "Early APIC setup for system timer0\n");
-#ifndef CONFIG_SMP
-	physid_set_mask_of_physid(boot_cpu_physical_apicid,
-					 &phys_cpu_present_map);
-#endif
-	setup_local_APIC();
-
-	io_apic_setup_irq_pin(0, 0, &attr);
-	irq_set_chip_and_handler_name(0, &ioapic_chip, handle_edge_irq,
-				      "edge");
-}
diff --git a/arch/x86/platform/intel-mid/intel-mid.c b/arch/x86/platform/intel-mid/intel-mid.c
index 1bbedc4b0f88..f8855b703cab 100644
--- a/arch/x86/platform/intel-mid/intel-mid.c
+++ b/arch/x86/platform/intel-mid/intel-mid.c
@@ -99,7 +99,9 @@ static void __init intel_mid_time_init(void)
 		return;
 	}
 	/* we need at least one APB timer */
+#if 0
 	pre_init_apic_IRQ0();
+#endif
 	apbt_time_init();
 }
 
-- 
1.7.10.4

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