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Message-ID: <1217246876-670-1-git-send-email-joerg.roedel@amd.com> Date: Mon, 28 Jul 2008 14:07:56 +0200 From: Joerg Roedel <joerg.roedel@....com> To: Andrew Morton <akpm@...ux-foundation.org> CC: linux-kernel@...r.kernel.org, Joerg Roedel <joerg.roedel@....com>, "H. Peter Anvin" <hpa@...or.com> Subject: [PATCH] introduce lower_32_bits() macro The file kernel.h contains the upper_32_bits macro. This patch adds the other part, the lower_32_bits macro. Its first use will be in the driver for AMD IOMMU. Cc: H. Peter Anvin <hpa@...or.com> Signed-off-by: Joerg Roedel <joerg.roedel@....com> --- include/linux/kernel.h | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/include/linux/kernel.h b/include/linux/kernel.h index fdbbf72..aaa998f 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -75,6 +75,12 @@ extern const char linux_proc_banner[]; */ #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16)) +/** + * lower_32_bits - return bits 0-31 of a number + * @n: the number we're accessing + */ +#define lower_32_bits(n) ((u32)(n)) + #define KERN_EMERG "<0>" /* system is unusable */ #define KERN_ALERT "<1>" /* action must be taken immediately */ #define KERN_CRIT "<2>" /* critical conditions */ -- 1.5.3.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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