memblock: Move memblock arrays to static storage in memblock.c and make their size a variable

This is in preparation for having resizable arrays.

Note that we still allocate one more than needed, this is unchanged from
the previous implementation.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index c9c7b0f344a5..150be938b910 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -18,7 +18,7 @@
 
 #include <asm/memblock.h>
 
-#define MAX_MEMBLOCK_REGIONS 128
+#define INIT_MEMBLOCK_REGIONS 128
 
 struct memblock_region {
         phys_addr_t base;
@@ -26,8 +26,9 @@ struct memblock_region {
 };
 
 struct memblock_type {
-        unsigned long cnt;
-        struct memblock_region regions[MAX_MEMBLOCK_REGIONS+1];
+        unsigned long cnt;      /* number of regions */
+        unsigned long max;      /* size of the allocated array */
+        struct memblock_region *regions;
 };
 
 struct memblock {