[PATCH 7/7 v4] sh: mcount.S: fix build error when PRINTK is not enabled

[Randy Dunlap]

Fix a build error in mcount.S when CONFIG_PRINTK is not enabled.
Fixes this build error:

sh2-linux-ld: arch/sh/lib/mcount.o: in function `stack_panic':
(.text+0xec): undefined reference to `dump_stack'

Fixes: e460ab27b6c3 ("sh: Fix up stack overflow check with ftrace disabled.")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Suggested-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
v2: add PRINTK to STACK_DEBUG dependency (thanks, Geert)
v3: skipped
v4: refresh & resend

 arch/sh/Kconfig.debug |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -- a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug
--- a/arch/sh/Kconfig.debug
+++ b/arch/sh/Kconfig.debug
@@ -15,7 +15,7 @@ config SH_STANDARD_BIOS
 
 config STACK_DEBUG
 	bool "Check for stack overflows"
-	depends on DEBUG_KERNEL
+	depends on DEBUG_KERNEL && PRINTK
 	help
 	  This option will cause messages to be printed if free stack space
 	  drops below a certain limit. Saying Y here will add overhead to