[ARM] rationalize memory configuration code some more
Currently there are two instances of struct meminfo: one in
kernel/setup.c marked __initdata, and another in mm/init.c with
permanent storage. Let's keep only the later to directly populate
the permanent version from arm_add_memory().
Also move common validation tests between the MMU and non-MMU cases
into arm_add_memory() to remove some duplication. Protection against
overflowing the membank array is also moved in there in order to cover
the kernel cmdline parsing path as well.
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 82c4b42..b43da24 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -64,10 +64,11 @@
__tagtable(ATAG_INITRD2, parse_tag_initrd2);
/*
- * This is used to pass memory configuration data from paging_init
- * to mem_init, and by show_mem() to skip holes in the memory map.
+ * This keeps memory configuration data used by a couple memory
+ * initialization functions, as well as show_mem() for the skipping
+ * of holes in the memory map. It is populated by arm_add_memory().
*/
-static struct meminfo meminfo = { 0, };
+struct meminfo meminfo;
void show_mem(void)
{
@@ -331,13 +332,12 @@
free_area_init_node(node, zone_size, start_pfn, zhole_size);
}
-void __init bootmem_init(struct meminfo *mi)
+void __init bootmem_init(void)
{
+ struct meminfo *mi = &meminfo;
unsigned long memend_pfn = 0;
int node, initrd_node;
- memcpy(&meminfo, mi, sizeof(meminfo));
-
/*
* Locate which node contains the ramdisk image, if any.
*/