[PATCH] Disable DETECT_SOFTLOCKUP for s390

We got several false bug reports because of enabled
CONFIG_DETECT_SOFTLOCKUP.  Disable soft lockup detection on s390, since it
doesn't work on a virtualized architecture.

Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

lib/Kconfig.debug

@@ -71,7 +71,7 @@ config LOG_BUF_SHIFT
 
 config DETECT_SOFTLOCKUP
 	bool "Detect Soft Lockups"
-	depends on DEBUG_KERNEL
+	depends on DEBUG_KERNEL && !S390
 	default y
 	help
 	  Say Y here to enable the kernel to detect "soft lockups",