linux-kernel - [PATCH 7/7] arm64: disable kcov instrument in header files

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Message-ID: <20250114-kcov-v1-7-004294b931a2@quicinc.com>
Date: Tue, 14 Jan 2025 13:34:37 +0800
From: "Jiao, Joey" <quic_jiangenj@...cinc.com>
To: Dmitry Vyukov <dvyukov@...gle.com>,
        Andrey Konovalov
	<andreyknvl@...il.com>,
        Jonathan Corbet <corbet@....net>,
        Andrew Morton
	<akpm@...ux-foundation.org>,
        Dennis Zhou <dennis@...nel.org>, Tejun Heo
	<tj@...nel.org>,
        Christoph Lameter <cl@...ux.com>,
        Catalin Marinas
	<catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
CC: <kasan-dev@...glegroups.com>, <linux-kernel@...r.kernel.org>,
        <workflows@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <linux-mm@...ck.org>, <linux-arm-kernel@...ts.infradead.org>,
        <kernel@...cinc.com>
Subject: [PATCH 7/7] arm64: disable kcov instrument in header files

Disable instrument which causes recursive call to __sanitizer_cov_trace_pc

Signed-off-by: Jiao, Joey <quic_jiangenj@...cinc.com>
---
 arch/arm64/include/asm/percpu.h  | 2 +-
 arch/arm64/include/asm/preempt.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/include/asm/percpu.h b/arch/arm64/include/asm/percpu.h
index 9abcc8ef3087b7066c82db983ae2753f30607f7f..a40ff8168151bb481756d0f6cb341aa8dc52a121 100644
--- a/arch/arm64/include/asm/percpu.h
+++ b/arch/arm64/include/asm/percpu.h
@@ -29,7 +29,7 @@ static inline unsigned long __hyp_my_cpu_offset(void)
 	return read_sysreg(tpidr_el2);
 }
 
-static inline unsigned long __kern_my_cpu_offset(void)
+static __no_sanitize_coverage inline unsigned long __kern_my_cpu_offset(void)
 {
 	unsigned long off;
 
diff --git a/arch/arm64/include/asm/preempt.h b/arch/arm64/include/asm/preempt.h
index 0159b625cc7f0e7d6996b34b4de8e71b04ca32e5..a8742a57481a8bf7f1e35b9cd8b0fd9a37f0ba78 100644
--- a/arch/arm64/include/asm/preempt.h
+++ b/arch/arm64/include/asm/preempt.h
@@ -8,7 +8,7 @@
 #define PREEMPT_NEED_RESCHED	BIT(32)
 #define PREEMPT_ENABLED	(PREEMPT_NEED_RESCHED)
 
-static inline int preempt_count(void)
+static __no_sanitize_coverage inline int preempt_count(void)
 {
 	return READ_ONCE(current_thread_info()->preempt.count);
 }

-- 
2.47.1