powerpc: provide ppc_md.panic() for both ppc32 & ppc64

Allow boards to provide a panic callback on ppc32.  Moved the code to sets
this up into setup-common.c so its shared between ppc32 & ppc64.  Also moved
do_init_bootmem prototype into setup.h.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

4 files changed, 23 insertions, 19 deletions

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 684ab1d49c65..88de557fe046 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -524,3 +524,20 @@ int check_legacy_ioport(unsigned long base_port)
         return ppc_md.check_legacy_ioport(base_port);
 }
 EXPORT_SYMBOL(check_legacy_ioport);
+
+static int ppc_panic_event(struct notifier_block *this,
+                             unsigned long event, void *ptr)
+{
+        ppc_md.panic(ptr);  /* May not return */
+        return NOTIFY_DONE;
+}
+
+static struct notifier_block ppc_panic_block = {
+        .notifier_call = ppc_panic_event,
+        .priority = INT_MIN /* may not return; must be done last */
+};
+
+void __init setup_panic(void)
+{
+        atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block);
+}
diff --git a/arch/powerpc/kernel/setup.h b/arch/powerpc/kernel/setup.h
index 2ebba755272e..e67066c1933e 100644
--- a/arch/powerpc/kernel/setup.h
+++ b/arch/powerpc/kernel/setup.h
@@ -2,5 +2,7 @@
 #define _POWERPC_KERNEL_SETUP_H
 
 void check_for_initrd(void);
+void do_init_bootmem(void);
+void setup_panic(void);
 
 #endif /* _POWERPC_KERNEL_SETUP_H */
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 69ac25701344..88832b3ee661 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -235,8 +235,6 @@ arch_initcall(ppc_init);
 /* Warning, IO base is not yet inited */
 void __init setup_arch(char **cmdline_p)
 {
-        extern void do_init_bootmem(void);
-
         /* so udelay does something sensible, assume <= 1000 bogomips */
         loops_per_jiffy = 500000000 / HZ;
 
@@ -285,6 +283,9 @@ void __init setup_arch(char **cmdline_p)
         /* reboot on panic */
         panic_timeout = 180;
 
+        if (ppc_md.panic)
+                setup_panic();
+
         init_mm.start_code = PAGE_OFFSET;
         init_mm.end_code = (unsigned long) _etext;
         init_mm.end_data = (unsigned long) _edata;
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 4467c49903b6..ab6ea37a77aa 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -100,12 +100,6 @@ unsigned long SYSRQ_KEY;
 #endif /* CONFIG_MAGIC_SYSRQ */
 
 
-static int ppc64_panic_event(struct notifier_block *, unsigned long, void *);
-static struct notifier_block ppc64_panic_block = {
-        .notifier_call = ppc64_panic_event,
-        .priority = INT_MIN /* may not return; must be done last */
-};
-
 #ifdef CONFIG_SMP
 
 static int smt_enabled_cmdline;
@@ -456,13 +450,6 @@ void __init setup_system(void)
         DBG(" <- setup_system()\n");
 }
 
-static int ppc64_panic_event(struct notifier_block *this,
-                             unsigned long event, void *ptr)
-{
-        ppc_md.panic((char *)ptr);  /* May not return */
-        return NOTIFY_DONE;
-}
-
 #ifdef CONFIG_IRQSTACKS
 static void __init irqstack_early_init(void)
 {
@@ -517,8 +504,6 @@ static void __init emergency_stack_init(void)
  */
 void __init setup_arch(char **cmdline_p)
 {
-        extern void do_init_bootmem(void);
-
         ppc64_boot_msg(0x12, "Setup Arch");
 
         *cmdline_p = cmd_line;
@@ -535,8 +520,7 @@ void __init setup_arch(char **cmdline_p)
         panic_timeout = 180;
 
         if (ppc_md.panic)
-                atomic_notifier_chain_register(&panic_notifier_list,
-                                &ppc64_panic_block);
+                setup_panic();
 
         init_mm.start_code = PAGE_OFFSET;
         init_mm.end_code = (unsigned long) _etext;