linux-kernel - [PATCH] MIPS: allow building with kcov coverage

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Date:   Wed,  6 Nov 2019 20:28:42 +0300
From:   Alexey Khoroshilov <khoroshilov@...ras.ru>
To:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paulburton@...nel.org>,
        James Hogan <jhogan@...nel.org>
Cc:     Alexey Khoroshilov <khoroshilov@...ras.ru>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] MIPS: allow building with kcov coverage

Add ARCH_HAS_KCOV and HAVE_GCC_PLUGINS to MIPS config.
Disable instrumentation of vdso to avoid build failure.

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
---
 arch/mips/Kconfig       | 2 ++
 arch/mips/vdso/Makefile | 1 +
 2 files changed, 3 insertions(+)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 7cb8947..2ae1e6d 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -87,6 +87,8 @@ config MIPS
 	select SYSCTL_EXCEPTION_TRACE
 	select VIRT_TO_BUS
 	select ARCH_HAS_PTE_SPECIAL if !(32BIT && CPU_HAS_RIXI)
+	select ARCH_HAS_KCOV
+	select HAVE_GCC_PLUGINS
 
 menu "Machine selection"
 
diff --git a/arch/mips/vdso/Makefile b/arch/mips/vdso/Makefile
index 996a934..e059389 100644
--- a/arch/mips/vdso/Makefile
+++ b/arch/mips/vdso/Makefile
@@ -75,6 +75,7 @@ CFLAGS_REMOVE_vdso.o = -pg
 
 GCOV_PROFILE := n
 UBSAN_SANITIZE := n
+KCOV_INSTRUMENT := n
 
 #
 # Shared build commands.
-- 
2.7.4