From: Lin Feng <linfeng@cn.fujitsu.com>
To: akpm@linux-foundation.org
Cc: linux-mm@kvack.org, x86@kernel.org, linux-kernel@vger.kernel.org,
tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
yinghai@kernel.org, penberg@kernel.org, jacob.shin@amd.com,
Lin Feng <linfeng@cn.fujitsu.com>
Subject: [PATCH] x86: mm: accurate the comments for STEP_SIZE_SHIFT macro
Date: Mon, 18 Mar 2013 18:21:08 +0800 [thread overview]
Message-ID: <1363602068-11924-1-git-send-email-linfeng@cn.fujitsu.com> (raw)
For x86 PUD_SHIFT is 30 and PMD_SHIFT is 21, so the consequence of
(PUD_SHIFT-PMD_SHIFT)/2 is 4. Update the comments to the code.
Cc: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Lin Feng <linfeng@cn.fujitsu.com>
---
arch/x86/mm/init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 59b7fc4..637a95b 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -389,7 +389,7 @@ static unsigned long __init init_range_memory_mapping(
return mapped_ram_size;
}
-/* (PUD_SHIFT-PMD_SHIFT)/2 */
+/* (PUD_SHIFT-PMD_SHIFT)/2+1 */
#define STEP_SIZE_SHIFT 5
void __init init_mem_mapping(void)
{
--
1.8.0.1
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next reply other threads:[~2013-03-18 11:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-18 10:21 Lin Feng [this message]
2013-03-18 18:53 ` Yinghai Lu
2013-03-18 18:59 ` H. Peter Anvin
2013-03-18 19:13 ` Yinghai Lu
2013-03-18 19:14 ` H. Peter Anvin
2013-03-18 21:19 ` Yinghai Lu
2013-03-18 22:50 ` H. Peter Anvin
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