linux-kernel - [RFC v1 3/8] x86/boot: add BIT() to boot/bitops.h

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Message-Id: <1450217797-19295-4-git-send-email-mcgrof@do-not-panic.com>
Date:	Tue, 15 Dec 2015 14:16:32 -0800
From:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>
To:	hpa@...or.com, tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
	konrad.wilk@...cle.com
Cc:	rusty@...tcorp.com.au, luto@...capital.net,
	boris.ostrovsky@...cle.com, mcb30@...e.org, jgross@...e.com,
	JBeulich@...e.com, joro@...tes.org, ryabinin.a.a@...il.com,
	andreyknvl@...gle.com, long.wanglong@...wei.com,
	qiuxishi@...wei.com, aryabinin@...tuozzo.com,
	mchehab@....samsung.com, valentinrothberg@...il.com,
	peter.senna@...il.com, mcgrof@...e.com, x86@...nel.org,
	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org
Subject: [RFC v1 3/8] x86/boot: add BIT() to boot/bitops.h

From: "Luis R. Rodriguez" <mcgrof@...e.com>

The boot/bitops.h guards against included the regular bitops,
it only implements what we need at early boot. We'll be making
use of BIT() later so add it.

Users of boot/boot.h must include it prior to asm/setup.h
otherwise the guard protection devise against the regular
linux/bitops.h will not take effect.

Signed-off-by: Luis R. Rodriguez <mcgrof@...e.com>
---
 arch/x86/boot/bitops.h | 2 ++
 arch/x86/boot/boot.h   | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/boot/bitops.h b/arch/x86/boot/bitops.h
index 878e4b9940d9..232cff0ff4e3 100644
--- a/arch/x86/boot/bitops.h
+++ b/arch/x86/boot/bitops.h
@@ -40,4 +40,6 @@ static inline void set_bit(int nr, void *addr)
 	asm("btsl %1,%0" : "+m" (*(u32 *)addr) : "Ir" (nr));
 }
 
+#define BIT(x)	(1 << x)
+
 #endif /* BOOT_BITOPS_H */
diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h
index 9011a88353de..4fb53da1f48a 100644
--- a/arch/x86/boot/boot.h
+++ b/arch/x86/boot/boot.h
@@ -23,8 +23,8 @@
 #include <stdarg.h>
 #include <linux/types.h>
 #include <linux/edd.h>
-#include <asm/setup.h>
 #include "bitops.h"
+#include <asm/setup.h>
 #include "ctype.h"
 #include "cpuflags.h"
 
-- 
2.6.2

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