linux-kernel - [PATCH v3 09/11] x86/boot: add BIT() to boot/bitops.h

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Message-Id: <1456212255-23959-10-git-send-email-mcgrof@kernel.org>
Date:	Mon, 22 Feb 2016 23:24:13 -0800
From:	"Luis R. Rodriguez" <mcgrof@...nel.org>
To:	bp@...en8.de, hpa@...or.com, tglx@...utronix.de, mingo@...hat.com,
	rusty@...tcorp.com.au
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org, luto@...capital.net,
	boris.ostrovsky@...cle.com, david.vrabel@...rix.com,
	konrad.wilk@...cle.com, xen-devel@...ts.xensource.com,
	lguest@...ts.ozlabs.org, "Luis R. Rodriguez" <mcgrof@...nel.org>
Subject: [PATCH v3 09/11] x86/boot: add BIT() to boot/bitops.h

The boot/bitops.h has guards against including the
regular bitops (include/asm-generic/bitops.h), 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 devised against the regular
linux/bitops.h will not take effect.

v2: spelling fixes, and language descriptipon enhancements
    by Konrad.
v3: Parenthesize (x), just match what is in include/linux/bitmap.h

Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@...nel.org>
---
 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..cfe154c0bd3d 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(nr)	(1UL << (nr))
+
 #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"
 
-- 
2.7.0