sh: stacktrace: Add reliability checks in address saving ops.

This adopts the reliability checks from the x86 stacktrace code so known
bad addresses are not recorded in the stack trace buffer.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/sh/kernel/stacktrace.c b/arch/sh/kernel/stacktrace.c
index 45b1adde3abe..a0f497bcbb4f 100644
--- a/arch/sh/kernel/stacktrace.c
+++ b/arch/sh/kernel/stacktrace.c
@@ -38,6 +38,9 @@ static void save_stack_address(void *data, unsigned long addr, int reliable)
 {
         struct stack_trace *trace = data;
 
+        if (!reliable)
+                return;
+
         if (trace->skip > 0) {
                 trace->skip--;
                 return;
@@ -67,6 +70,9 @@ save_stack_address_nosched(void *data, unsigned long addr, int reliable)
 {
         struct stack_trace *trace = (struct stack_trace *)data;
 
+        if (!reliable)
+                return;
+
         if (in_sched_functions(addr))
                 return;