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authorDavid S. Miller <davem@davemloft.net>2008-09-16 11:44:00 -0700
committerDavid S. Miller <davem@davemloft.net>2008-09-16 11:44:00 -0700
commit9843099ff46467461d6476a827f6f9701682dbac (patch)
tree989c39138718d8ea005a8fcf9651da19a2f270a8
parentf948cc6ab9e61a8e88d70ee9aafc690e6d26f92c (diff)
downloadlinux-linaro-android-9843099ff46467461d6476a827f6f9701682dbac.tar.gz
sparc64: Fix SMP bootup with CONFIG_STACK_DEBUG or ftrace.
Based upon a report by Meelis Roos. Any function call can try to access the current thread register via the _mcount hooks when the kernel is built with -pg (via ftrace or STACK_DEBUG). That can't be setup properly very early on during the bootup of other cpus for sun4u and some early sun4v systems. So add notrace markers to these specific functions, so that _mcount doesn't get invoked too early. Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--arch/sparc64/kernel/irq.c5
-rw-r--r--arch/sparc64/kernel/traps.c3
2 files changed, 5 insertions, 3 deletions
diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
index 23963882bc1..7495bc77468 100644
--- a/arch/sparc64/kernel/irq.c
+++ b/arch/sparc64/kernel/irq.c
@@ -7,6 +7,7 @@
#include <linux/module.h>
#include <linux/sched.h>
+#include <linux/linkage.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/kernel_stat.h>
@@ -866,7 +867,7 @@ static void kill_prom_timer(void)
: "g1", "g2");
}
-void init_irqwork_curcpu(void)
+void notrace init_irqwork_curcpu(void)
{
int cpu = hard_smp_processor_id();
@@ -897,7 +898,7 @@ static void __cpuinit register_one_mondo(unsigned long paddr, unsigned long type
}
}
-void __cpuinit sun4v_register_mondo_queues(int this_cpu)
+void __cpuinit notrace sun4v_register_mondo_queues(int this_cpu)
{
struct trap_per_cpu *tb = &trap_block[this_cpu];
diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index 3d924121c79..c824df13f58 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -10,6 +10,7 @@
#include <linux/module.h>
#include <linux/sched.h>
+#include <linux/linkage.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/smp.h>
@@ -2453,7 +2454,7 @@ struct trap_per_cpu trap_block[NR_CPUS];
/* This can get invoked before sched_init() so play it super safe
* and use hard_smp_processor_id().
*/
-void init_cur_cpu_trap(struct thread_info *t)
+void notrace init_cur_cpu_trap(struct thread_info *t)
{
int cpu = hard_smp_processor_id();
struct trap_per_cpu *p = &trap_block[cpu];