linux-kernel - [PATCH] x86/elf: Fix use of internal macro BIT in uapi header

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Date:   Mon, 26 Oct 2020 10:18:35 -0700
From:   Thiago Macieira <thiago.macieira@...el.com>
To:     linux-kernel@...r.kernel.org, Sasha Levin <sashal@...nel.org>,
        tglx@...utronix.de, luto@...nel.org,
        Andi Kleen <ak@...ux.intel.com>
Cc:     Dave Hansen <dave.hansen@...ux.intel.com>, corbet@....net,
        mingo@...hat.com, bp@...en8.de, x86@...nel.org, shuah@...nel.org,
        gregkh@...uxfoundation.org, tony.luck@...el.com,
        chang.seok.bae@...el.com
Subject: [PATCH] x86/elf: Fix use of internal macro BIT in uapi header

This breaks the build in userspace since this macro is not available.

<stdin>:1:18: error: ‘BIT’ was not declared in this scope

Fixes: 742c45c3ecc9255e1 ("x86/elf: Enumerate kernel FSGSBASE capability in AT_HWCAP2")
Cc: Andi Kleen <ak@...ux.intel.com>
Acked-by: Dave Hansen <dave.hansen@...ux.intel.com>
Signed-off-by: Thiago Macieira <thiago.macieira@...el.com>
---
 arch/x86/include/uapi/asm/hwcap2.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/uapi/asm/hwcap2.h b/arch/x86/include/uapi/asm/hwcap2.h
index 5fdfcb47000f..6d2175b43710 100644
--- a/arch/x86/include/uapi/asm/hwcap2.h
+++ b/arch/x86/include/uapi/asm/hwcap2.h
@@ -6,6 +6,6 @@
 #define HWCAP2_RING3MWAIT		(1 << 0)
 
 /* Kernel allows FSGSBASE instructions available in Ring 3 */
-#define HWCAP2_FSGSBASE			BIT(1)
+#define HWCAP2_FSGSBASE			(1 << 1)
 
 #endif
-- 
2.29.0