sh: Provide diagnostic kernel stack checks

Enable kernel stack checking code in both the dynamic ftrace and mcount
code paths. Check the stack to see if it's overflowing and make sure
that the stack pointer contains an address that's either in init_stack
or after the bss.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/sh/kernel/asm-offsets.c b/arch/sh/kernel/asm-offsets.c
index 99aceb28ee24..d218e808294e 100644
--- a/arch/sh/kernel/asm-offsets.c
+++ b/arch/sh/kernel/asm-offsets.c
@@ -26,6 +26,7 @@ int main(void)
         DEFINE(TI_CPU,          offsetof(struct thread_info, cpu));
         DEFINE(TI_PRE_COUNT,    offsetof(struct thread_info, preempt_count));
         DEFINE(TI_RESTART_BLOCK,offsetof(struct thread_info, restart_block));
+        DEFINE(TI_SIZE,         sizeof(struct thread_info));
 
 #ifdef CONFIG_HIBERNATION
         DEFINE(PBE_ADDRESS, offsetof(struct pbe, address));