x86: clean up using max_low_pfn on 32-bit
so that max_low_pfn is not changed after it is set.
so we can move that early and out of initmem_init.
could call find_low_pfn_range just after max_pfn is set.
also could move reserve_initrd out of setup_bootmem_allocator
so 32bit is more like 64bit.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index d101733..27b8293 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -561,9 +561,15 @@
/*
* Determine low and high memory ranges:
*/
-unsigned long __init find_max_low_pfn(void)
+void __init find_low_pfn_range(void)
{
- unsigned long max_low_pfn;
+ /* it could update max_pfn */
+
+ /*
+ * partially used pages are not usable - thus
+ * we are rounding upwards:
+ */
+ min_low_pfn = PFN_UP(init_pg_tables_end);
max_low_pfn = max_pfn;
if (max_low_pfn > MAXMEM_PFN) {
@@ -625,21 +631,12 @@
" kernel!\n");
#endif
}
- return max_low_pfn;
}
#ifndef CONFIG_NEED_MULTIPLE_NODES
-unsigned long __init initmem_init(unsigned long start_pfn,
+void __init initmem_init(unsigned long start_pfn,
unsigned long end_pfn)
{
- /*
- * partially used pages are not usable - thus
- * we are rounding upwards:
- */
- min_low_pfn = PFN_UP(init_pg_tables_end);
-
- max_low_pfn = find_max_low_pfn();
-
#ifdef CONFIG_HIGHMEM
highstart_pfn = highend_pfn = max_pfn;
if (max_pfn > max_low_pfn)
@@ -661,8 +658,6 @@
pages_to_mb(max_low_pfn));
setup_bootmem_allocator();
-
- return max_low_pfn;
}
void __init zone_sizes_init(void)
@@ -699,8 +694,6 @@
panic("Cannot find bootmem map of size %ld\n", bootmap_size);
reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
- reserve_initrd();
-
bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, max_low_pfn);
printk(KERN_INFO " mapped low ram: 0 - %08lx\n",
max_pfn_mapped<<PAGE_SHIFT);