[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 7ecdda3..9fed5fa 100644 (file)
--- 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 9799fe8..ac4dd43 100644 (file)
--- 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 379ea5e..59c7964 100644 (file)
--- 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 b13a8da..8405eb6 100644 (file)
--- 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__(                           \