summaryrefslogtreecommitdiffstats
path: root/arch/x86/mm/init.c
diff options
context:
space:
mode:
authorYinghai Lu <yinghai@kernel.org>2012-11-17 04:38:39 +0100
committerH. Peter Anvin <hpa@linux.intel.com>2012-11-17 20:59:01 +0100
commit4e33e06555329e93523b3d2590b9210bf84120a3 (patch)
tree17ac501de467cb9621c1d8ee00375ba851e59a7e /arch/x86/mm/init.c
parentx86, mm: Add global page_size_mask and probe one time only (diff)
downloadlinux-4e33e06555329e93523b3d2590b9210bf84120a3.tar.xz
linux-4e33e06555329e93523b3d2590b9210bf84120a3.zip
x86, mm: Split out split_mem_range from init_memory_mapping
So make init_memory_mapping smaller and readable. -v2: use 0 instead of nr_range as input parameter found by Yasuaki Ishimatsu. Suggested-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Link: http://lkml.kernel.org/r/1353123563-3103-3-git-send-email-yinghai@kernel.org Reviewed-by: Pekka Enberg <penberg@kernel.org> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/mm/init.c')
-rw-r--r--arch/x86/mm/init.c41
1 files changed, 25 insertions, 16 deletions
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index aa5b0da03f6d..6368b86b84e2 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -146,25 +146,13 @@ static int __meminit save_mr(struct map_range *mr, int nr_range,
return nr_range;
}
-/*
- * Setup the direct mapping of the physical memory at PAGE_OFFSET.
- * This runs before bootmem is initialized and gets pages directly from
- * the physical memory. To access them they are temporarily mapped.
- */
-unsigned long __init_refok init_memory_mapping(unsigned long start,
- unsigned long end)
+static int __meminit split_mem_range(struct map_range *mr, int nr_range,
+ unsigned long start,
+ unsigned long end)
{
unsigned long start_pfn, end_pfn;
- unsigned long ret = 0;
unsigned long pos;
- struct map_range mr[NR_RANGE_MR];
- int nr_range, i;
-
- printk(KERN_INFO "init_memory_mapping: [mem %#010lx-%#010lx]\n",
- start, end - 1);
-
- memset(mr, 0, sizeof(mr));
- nr_range = 0;
+ int i;
/* head if not big page alignment ? */
start_pfn = start >> PAGE_SHIFT;
@@ -258,6 +246,27 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
(mr[i].page_size_mask & (1<<PG_LEVEL_1G))?"1G":(
(mr[i].page_size_mask & (1<<PG_LEVEL_2M))?"2M":"4k"));
+ return nr_range;
+}
+
+/*
+ * Setup the direct mapping of the physical memory at PAGE_OFFSET.
+ * This runs before bootmem is initialized and gets pages directly from
+ * the physical memory. To access them they are temporarily mapped.
+ */
+unsigned long __init_refok init_memory_mapping(unsigned long start,
+ unsigned long end)
+{
+ struct map_range mr[NR_RANGE_MR];
+ unsigned long ret = 0;
+ int nr_range, i;
+
+ pr_info("init_memory_mapping: [mem %#010lx-%#010lx]\n",
+ start, end - 1);
+
+ memset(mr, 0, sizeof(mr));
+ nr_range = split_mem_range(mr, 0, start, end);
+
/*
* Find space for the kernel direct mapping tables.
*