From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Sun, 19 Jun 2005 17:39:33 +0000 (+0100)
Subject: [PATCH] ARM SMP: Fix PXA/SA11x0 suspend resume crash
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=36c5ed23b9f535d1c79986efb45f9c1f115e0997;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

[PATCH] ARM SMP: Fix PXA/SA11x0 suspend resume crash

We need to re-initialise the stack pointers for undefined, IRQ
and abort mode handlers whenever we resume.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 7ecdda3f125..9fed5fa194d 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -328,7 +328,7 @@ static void __init setup_processor(void)
  * cpu_init dumps the cache information, initialises SMP specific
  * information, and sets up the per-CPU stacks.
  */
-void __init cpu_init(void)
+void cpu_init(void)
 {
 	unsigned int cpu = smp_processor_id();
 	struct stack *stk = &stacks[cpu];
diff --git a/arch/arm/mach-pxa/pm.c b/arch/arm/mach-pxa/pm.c
index 9799fe80df2..ac4dd433616 100644
--- a/arch/arm/mach-pxa/pm.c
+++ b/arch/arm/mach-pxa/pm.c
@@ -133,6 +133,8 @@ static int pxa_pm_enter(suspend_state_t state)
 	/* *** go zzz *** */
 	pxa_cpu_pm_enter(state);
 
+	cpu_init();
+
 	/* after sleeping, validate the checksum */
 	checksum = 0;
 	for (i = 0; i < SLEEP_SAVE_SIZE - 1; i++)
diff --git a/arch/arm/mach-sa1100/pm.c b/arch/arm/mach-sa1100/pm.c
index 379ea5e3950..59c7964cfe1 100644
--- a/arch/arm/mach-sa1100/pm.c
+++ b/arch/arm/mach-sa1100/pm.c
@@ -88,6 +88,8 @@ static int sa11x0_pm_enter(suspend_state_t state)
 	/* go zzz */
 	sa1100_cpu_suspend();
 
+	cpu_init();
+
 	/*
 	 * Ensure not to come back here if it wasn't intended
 	 */
diff --git a/include/asm-arm/system.h b/include/asm-arm/system.h
index b13a8da4847..8405eb6558e 100644
--- a/include/asm-arm/system.h
+++ b/include/asm-arm/system.h
@@ -104,6 +104,7 @@ extern void show_pte(struct mm_struct *mm, unsigned long addr);
 extern void __show_regs(struct pt_regs *);
 
 extern int cpu_architecture(void);
+extern void cpu_init(void);
 
 #define set_cr(x)					\
 	__asm__ __volatile__(				\