linux-kernel - Re: [RFC v2 1/6] x86/boot: add BIT() to boot/bitops.h

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Date:	Fri, 19 Feb 2016 10:14:42 -0500
From:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:	"Luis R. Rodriguez" <mcgrof@...nel.org>, hpa@...or.com,
	tglx@...utronix.de, mingo@...hat.com, bp@...en8.de
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org, luto@...capital.net,
	rusty@...tcorp.com.au, david.vrabel@...rix.com,
	konrad.wilk@...cle.com, mcb30@...e.org, jgross@...e.com,
	andriy.shevchenko@...ux.intel.com, xen-devel@...ts.xensource.com
Subject: Re: [RFC v2 1/6] x86/boot: add BIT() to boot/bitops.h



On 02/19/2016 09:15 AM, Luis R. Rodriguez wrote:
> 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)

Parenthesize x.