linux-kernel - [PATCH] arm64: fix HARDLOCKUP

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Date:   Thu,  3 Dec 2020 23:27:26 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Sumit Garg <sumit.garg@...aro.org>,
        Alexandru Elisei <alexandru.elisei@....com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Mark Brown <broonie@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: fix HARDLOCKUP_DETECTOR dependency

From: Arnd Bergmann <arnd@...db.de>

When CONFIG_HW_PERF_EVENTS is disabled, the hardware lockup detector
fails to link:

ld.lld: error: undefined symbol: hw_nmi_get_sample_period
>>> referenced by watchdog_hld.c
>>>               watchdog_hld.o:(hardlockup_detector_event_create) in archive kernel/built-in.a

Fix the dependency to refer to the Kconfig symbol that actually controls
the feature.

Fixes: 367c820ef080 ("arm64: Enable perf events based hard lockup detector")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/arm64/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 7599ad86e9a8..ecd900ad7755 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -176,7 +176,7 @@ config ARM64
 	select HAVE_PATA_PLATFORM
 	select HAVE_PERF_EVENTS
 	select HAVE_PERF_EVENTS_NMI if ARM64_PSEUDO_NMI
-	select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI
+	select HAVE_HARDLOCKUP_DETECTOR_PERF if HW_PERF_EVENTS && HAVE_PERF_EVENTS_NMI
 	select HAVE_PERF_REGS
 	select HAVE_PERF_USER_STACK_DUMP
 	select HAVE_REGS_AND_STACK_ACCESS_API
-- 
2.27.0