On Mon, Mar 18, 2013 at 3:21 AM, Lin Feng <linf...@cn.fujitsu.com> wrote: > 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 <ying...@kernel.org> > Signed-off-by: Lin Feng <linf...@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) > {
9/2=4.5, so it becomes 5. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/