x86, mm: Merge alloc_low_page between 64bit and 32bit
They are almost same except 64 bit need to handle after_bootmem case.
Add mm_internal.h to make that alloc_low_page() only to be accessible
from arch/x86/mm/init*.c
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-25-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 1960820..1d53def 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -54,6 +54,8 @@
#include <asm/uv/uv.h>
#include <asm/setup.h>
+#include "mm_internal.h"
+
static int __init parse_direct_gbpages_off(char *arg)
{
direct_gbpages = 0;
@@ -314,36 +316,6 @@
}
}
-static __ref void *alloc_low_page(void)
-{
- unsigned long pfn;
- void *adr;
-
- if (after_bootmem) {
- adr = (void *)get_zeroed_page(GFP_ATOMIC | __GFP_NOTRACK);
-
- return adr;
- }
-
- if ((pgt_buf_end + 1) >= pgt_buf_top) {
- unsigned long ret;
- if (min_pfn_mapped >= max_pfn_mapped)
- panic("alloc_low_page: ran out of memory");
- ret = memblock_find_in_range(min_pfn_mapped << PAGE_SHIFT,
- max_pfn_mapped << PAGE_SHIFT,
- PAGE_SIZE, PAGE_SIZE);
- if (!ret)
- panic("alloc_low_page: can not alloc memory");
- memblock_reserve(ret, PAGE_SIZE);
- pfn = ret >> PAGE_SHIFT;
- } else
- pfn = pgt_buf_end++;
-
- adr = __va(pfn * PAGE_SIZE);
- clear_page(adr);
- return adr;
-}
-
static unsigned long __meminit
phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end,
pgprot_t prot)