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_32.c b/arch/x86/mm/init_32.c
index 7bb1106..a7f2df1 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -53,36 +53,14 @@
#include <asm/page_types.h>
#include <asm/init.h>
+#include "mm_internal.h"
+
unsigned long highstart_pfn, highend_pfn;
static noinline int do_test_wp_bit(void);
bool __read_mostly __vmalloc_start_set = false;
-static __init void *alloc_low_page(void)
-{
- unsigned long pfn;
- void *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;
-}
-
/*
* Creates a middle page table and puts a pointer to it in the
* given global directory entry. This only returns the gd entry