linux-kernel - [PATCH v2 1/8] arm64: compat: vdso: Expose BUILD

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Message-Id: <20190830135902.20861-2-vincenzo.frascino@arm.com>
Date:   Fri, 30 Aug 2019 14:58:55 +0100
From:   Vincenzo Frascino <vincenzo.frascino@....com>
To:     linux-arch@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Cc:     catalin.marinas@....com, will@...nel.org, paul.burton@...s.com,
        tglx@...utronix.de, salyzyn@...roid.com, 0x7f454c46@...il.com,
        luto@...nel.org
Subject: [PATCH v2 1/8] arm64: compat: vdso: Expose BUILD_VDSO32

clock_gettime32 and clock_getres_time32 should be compiled only with the
32 bit vdso library.

Expose BUILD_VDSO32 when arm64 compat is compiled, to provide an
indication to the generic library to include these symbols.

Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@....com>
Acked-by: Catalin Marinas <catalin.marinas@....com>
---
 arch/arm64/include/asm/vdso/compat_gettimeofday.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/include/asm/vdso/compat_gettimeofday.h b/arch/arm64/include/asm/vdso/compat_gettimeofday.h
index c50ee1b7d5cd..fe7afe0f1a3d 100644
--- a/arch/arm64/include/asm/vdso/compat_gettimeofday.h
+++ b/arch/arm64/include/asm/vdso/compat_gettimeofday.h
@@ -17,6 +17,7 @@
 #define VDSO_HAS_CLOCK_GETRES		1
 
 #define VDSO_HAS_32BIT_FALLBACK		1
+#define BUILD_VDSO32			1
 
 static __always_inline
 int gettimeofday_fallback(struct __kernel_old_timeval *_tv,
-- 
2.23.0