From: Paul Mackerras <paulus@samba.org>
Date: Fri, 6 May 2005 06:28:56 +0000 (+1000)
Subject: [PATCH] ppc64: global interrupt queue cleanup
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6c80a21cb1825e576ffff9df2302bf0fa1065ceb;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[PATCH] ppc64: global interrupt queue cleanup

Move the code to set global interrupt queue membership to xics.c,
and remove no longer needed extern declarations.  Also call it on
all cpus (even the boot cpu) to prepare for kexec.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: R Sharada <sharada@in.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/ppc64/kernel/pSeries_smp.c b/arch/ppc64/kernel/pSeries_smp.c
index c60d8cb2b84d..fbad349ec58c 100644
--- a/arch/ppc64/kernel/pSeries_smp.c
+++ b/arch/ppc64/kernel/pSeries_smp.c
@@ -326,13 +326,6 @@ static void __devinit smp_xics_setup_cpu(int cpu)
 
 	cpu_clear(cpu, of_spin_map);
 
-	/*
-	 * Put the calling processor into the GIQ.  This is really only
-	 * necessary from a secondary thread as the OF start-cpu interface
-	 * performs this function for us on primary threads.
-	 */
-	rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
-		(1UL << interrupt_server_size) - 1 - default_distrib_server, 1);
 }
 
 static DEFINE_SPINLOCK(timebase_lock);
diff --git a/arch/ppc64/kernel/xics.c b/arch/ppc64/kernel/xics.c
index eedd1d3c2a10..879f39b90a33 100644
--- a/arch/ppc64/kernel/xics.c
+++ b/arch/ppc64/kernel/xics.c
@@ -432,6 +432,7 @@ void xics_cause_IPI(int cpu)
 {
 	ops->qirr_info(cpu, IPI_PRIORITY);
 }
+#endif /* CONFIG_SMP */
 
 void xics_setup_cpu(void)
 {
@@ -439,9 +440,17 @@ void xics_setup_cpu(void)
 
 	ops->cppr_info(cpu, 0xff);
 	iosync();
-}
 
-#endif /* CONFIG_SMP */
+	/*
+	 * Put the calling processor into the GIQ.  This is really only
+	 * necessary from a secondary thread as the OF start-cpu interface
+	 * performs this function for us on primary threads.
+	 *
+	 * XXX: undo of teardown on kexec needs this too, as may hotplug
+	 */
+	rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
+		(1UL << interrupt_server_size) - 1 - default_distrib_server, 1);
+}
 
 void xics_init_IRQ(void)
 {
@@ -563,8 +572,7 @@ nextnode:
 	for (; i < NR_IRQS; ++i)
 		get_irq_desc(i)->handler = &xics_pic;
 
-	ops->cppr_info(boot_cpuid, 0xff);
-	iosync();
+	xics_setup_cpu();
 
 	ppc64_boot_msg(0x21, "XICS Done");
 }
diff --git a/include/asm-ppc64/xics.h b/include/asm-ppc64/xics.h
index 0027da4364ac..fdec5e7a7af6 100644
--- a/include/asm-ppc64/xics.h
+++ b/include/asm-ppc64/xics.h
@@ -30,7 +30,4 @@ struct xics_ipi_struct {
 
 extern struct xics_ipi_struct xics_ipi_message[NR_CPUS] __cacheline_aligned;
 
-extern unsigned int default_distrib_server;
-extern unsigned int interrupt_server_size;
-
 #endif /* _PPC64_KERNEL_XICS_H */