sparc64: Handle stack trace attempts before irqstacks are setup.
Things like lockdep can try to do stack backtraces before
the irqstack blocks have been setup. So don't try to match
their ranges so early on.
Also, remove unused variable in save_stack_trace().
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/kstack.h b/arch/sparc64/kernel/kstack.h
index 43909d5..4248d96 100644
--- a/arch/sparc64/kernel/kstack.h
+++ b/arch/sparc64/kernel/kstack.h
@@ -15,15 +15,16 @@
sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
return true;
- base = (unsigned long) hardirq_stack[tp->cpu];
- if (sp >= base &&
- sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
- return true;
- base = (unsigned long) softirq_stack[tp->cpu];
- if (sp >= base &&
- sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
- return true;
-
+ if (hardirq_stack[tp->cpu]) {
+ base = (unsigned long) hardirq_stack[tp->cpu];
+ if (sp >= base &&
+ sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
+ return true;
+ base = (unsigned long) softirq_stack[tp->cpu];
+ if (sp >= base &&
+ sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
+ return true;
+ }
return false;
}
@@ -37,15 +38,16 @@
addr <= (base + THREAD_SIZE - sizeof(*regs)))
goto check_magic;
- base = (unsigned long) hardirq_stack[tp->cpu];
- if (addr >= base &&
- addr <= (base + THREAD_SIZE - sizeof(*regs)))
- goto check_magic;
- base = (unsigned long) softirq_stack[tp->cpu];
- if (addr >= base &&
- addr <= (base + THREAD_SIZE - sizeof(*regs)))
- goto check_magic;
-
+ if (hardirq_stack[tp->cpu]) {
+ base = (unsigned long) hardirq_stack[tp->cpu];
+ if (addr >= base &&
+ addr <= (base + THREAD_SIZE - sizeof(*regs)))
+ goto check_magic;
+ base = (unsigned long) softirq_stack[tp->cpu];
+ if (addr >= base &&
+ addr <= (base + THREAD_SIZE - sizeof(*regs)))
+ goto check_magic;
+ }
return false;
check_magic:
diff --git a/arch/sparc64/kernel/stacktrace.c b/arch/sparc64/kernel/stacktrace.c
index 237e7f8..4e21d4a 100644
--- a/arch/sparc64/kernel/stacktrace.c
+++ b/arch/sparc64/kernel/stacktrace.c
@@ -9,8 +9,8 @@
void save_stack_trace(struct stack_trace *trace)
{
- unsigned long ksp, fp, thread_base;
struct thread_info *tp = task_thread_info(current);
+ unsigned long ksp, fp;
stack_trace_flush();
@@ -20,7 +20,6 @@
);
fp = ksp + STACK_BIAS;
- thread_base = (unsigned long) tp;
do {
struct sparc_stackf *sf;
struct pt_regs *regs;