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Commit bf23c51f authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt
Browse files

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: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 4734b594

include/linux/memblock.h

+4 −3
Original line number Diff line number Diff line
@@ -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 {

mm/memblock.c

+9 −1
Original line number Diff line number Diff line
@@ -18,6 +18,8 @@ 
struct memblock memblock;



static int memblock_debug;

static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS + 1];

static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS + 1];



static int __init early_memblock(char *p)

{
@@ -104,6 +106,12 @@ static void memblock_coalesce_regions(struct memblock_type *type, 


void __init memblock_init(void)

{

	/* Hookup the initial arrays */

	memblock.memory.regions	= memblock_memory_init_regions;

	memblock.memory.max		= INIT_MEMBLOCK_REGIONS;

	memblock.reserved.regions	= memblock_reserved_init_regions;

	memblock.reserved.max	= INIT_MEMBLOCK_REGIONS;



	/* Create a dummy zero size MEMBLOCK which will get coalesced away later.

	 * This simplifies the memblock_add() code below...

	 */
@@ -169,7 +177,7 @@ static long memblock_add_region(struct memblock_type *type, phys_addr_t base, ph 


	if (coalesced)

		return coalesced;

	if (type->cnt >= MAX_MEMBLOCK_REGIONS)

	if (type->cnt >= type->max)

		return -1;



	/* Couldn't coalesce the MEMBLOCK, so add it to the sorted table. */