[PATCH 1/2] build: Replace KERNEL_LOCKUP_DETECTOR with KERNEL_SOFTLOCKUP_DETECTOR

[Hauke Mehrtens]

The LOCKUP_DETECTOR configuration option split into the
SOFTLOCKUP_DETECTOR and HARDLOCKUP_DETECTOR configuration option some
time ago. The HARDLOCKUP_DETECTOR option is only working on some
architectures, but SOFTLOCKUP_DETECTOR should work everywhere. Replace
KERNEL_LOCKUP_DETECTOR with KERNEL_SOFTLOCKUP_DETECTOR.

LOCKUP_DETECTOR will be selected by SOFTLOCKUP_DETECTOR automatically.

Fixes: b951f53fbae3 ("build: Add additional kernel debug options")
Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 config/Config-kernel.in | 20 ++++----------------
 1 file changed, 4 insertions(+), 16 deletions(-)

diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index f71114b5daa8..d4648a506444 100644
--- a/config/Config-kernel.in
+++ b/config/Config-kernel.in
@@ -436,34 +436,22 @@ config KERNEL_PROVE_LOCKING
 	select KERNEL_DEBUG_KERNEL
 	default n
 
-config KERNEL_LOCKUP_DETECTOR
-	bool "Compile the kernel with detect Hard and Soft Lockups"
+config KERNEL_SOFTLOCKUP_DETECTOR
+	bool "Compile the kernel with detect Soft Lockups"
 	depends on KERNEL_DEBUG_KERNEL
 	help
 	  Say Y here to enable the kernel to act as a watchdog to detect
-	  hard and soft lockups.
+	  soft lockups.
 
 	  Softlockups are bugs that cause the kernel to loop in kernel
 	  mode for more than 20 seconds, without giving other tasks a
 	  chance to run.  The current stack trace is displayed upon
 	  detection and the system will stay locked up.
 
-	  Hardlockups are bugs that cause the CPU to loop in kernel mode
-	  for more than 10 seconds, without letting other interrupts have a
-	  chance to run.  The current stack trace is displayed upon detection
-	  and the system will stay locked up.
-
-	  The overhead should be minimal.  A periodic hrtimer runs to
-	  generate interrupts and kick the watchdog task every 4 seconds.
-	  An NMI is generated every 10 seconds or so to check for hardlockups.
-
-	  The frequency of hrtimer and NMI events and the soft and hard lockup
-	  thresholds can be controlled through the sysctl watchdog_thresh.
-
 config KERNEL_DETECT_HUNG_TASK
 	bool "Compile the kernel with detect Hung Tasks"
 	depends on KERNEL_DEBUG_KERNEL
-	default KERNEL_LOCKUP_DETECTOR
+	default KERNEL_SOFTLOCKUP_DETECTOR
 	help
 	  Say Y here to enable the kernel to detect "hung tasks",
 	  which are bugs that cause the task to be stuck in
-- 
2.30.2