[PATCH 7/7] watchdog/hardlockup: Define HARDLOCKUP_DETECTOR_ARCH

Petr Mladek
2023-06-07T15:28:10Z

The HAVE_ prefix means that the code could be enabled. Add another
variable for HAVE_HARDLOCKUP_DETECTOR_ARCH without this prefix.
It will be set when it should be built. It will make it compatible
with the other hardlockup detectors.

The change allows to clean up dependencies of PPC_WATCHDOG
and HAVE_HARDLOCKUP_DETECTOR_PERF definitions for powerpc.

As a result HAVE_HARDLOCKUP_DETECTOR_PERF has the same dependencies
on arm, x86, powerpc architectures.

Signed-off-by: Petr Mladek <pmladek@suse.com>
---
arch/powerpc/Kconfig | 5 ++---
include/linux/nmi.h | 2 +-
lib/Kconfig.debug | 9 +++++++++
3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 539d1f03ff42..987e730740d7 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -90,8 +90,7 @@ config NMI_IPI

config PPC_WATCHDOG
bool
- depends on HARDLOCKUP_DETECTOR
- depends on HAVE_HARDLOCKUP_DETECTOR_ARCH
+ depends on HARDLOCKUP_DETECTOR_ARCH
default y
help
This is a placeholder when the powerpc hardlockup detector
@@ -240,7 +239,7 @@ config PPC
select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC
select HAVE_GENERIC_VDSO
select HAVE_HARDLOCKUP_DETECTOR_ARCH if PPC_BOOK3S_64 && SMP
- select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH
+ select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI
select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
select HAVE_IOREMAP_PROT
select HAVE_IRQ_TIME_ACCOUNTING
diff --git a/include/linux/nmi.h b/include/linux/nmi.h
index 515d6724f469..ec808ebd36ba 100644
--- a/include/linux/nmi.h
+++ b/include/linux/nmi.h
@@ -9,7 +9,7 @@
#include <asm/irq.h>

/* Arch specific watchdogs might need to share extra watchdog-related APIs. */
-#if defined(CONFIG_HAVE_HARDLOCKUP_DETECTOR_ARCH) || defined(CONFIG_HARDLOCKUP_DETECTOR_SPARC64)
+#if defined(CONFIG_HARDLOCKUP_DETECTOR_ARCH) || defined(CONFIG_HARDLOCKUP_DETECTOR_SPARC64)
#include <asm/nmi.h>
#endif

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 116904e65d9f..97853ca54dc7 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1056,6 +1056,7 @@ config HARDLOCKUP_DETECTOR
depends on HAVE_HARDLOCKUP_DETECTOR_PERF || HAVE_HARDLOCKUP_DETECTOR_BUDDY || HAVE_HARDLOCKUP_DETECTOR_ARCH
imply HARDLOCKUP_DETECTOR_PERF
imply HARDLOCKUP_DETECTOR_BUDDY
+ imply HARDLOCKUP_DETECTOR_ARCH
select LOCKUP_DETECTOR

help
@@ -1102,6 +1103,14 @@ config HARDLOCKUP_DETECTOR_BUDDY
depends on !HAVE_HARDLOCKUP_DETECTOR_ARCH
select HARDLOCKUP_DETECTOR_COUNTS_HRTIMER

+config HARDLOCKUP_DETECTOR_ARCH
+ bool
+ depends on HARDLOCKUP_DETECTOR
+ depends on HAVE_HARDLOCKUP_DETECTOR_ARCH
+ help
+ The arch-specific implementation of the hardlockup detector is
+ available.
+
#
# Both the "perf" and "buddy" hardlockup detectors count hrtimer
# interrupts. This config enables functions managing this common code.
--
2.35.3