[PATCH] x86: mm: accurate the comments for STEP_SIZE_SHIFT macro

Lin Feng
2013-03-18T11:11:43Z

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