BACKPORT: mm/zpool: zbud/zsmalloc implement zpool

(cherry-pick from commit c795779df29e180738568d2a5eb3a42f3b5e47f0)

Update zbud and zsmalloc to implement the zpool api.

Bug: 25951511

Change-Id: Ib58729c1efeb4834d566d29f9abf33fec1f7f79d
[fengguang.wu@intel.com: make functions static]
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Tested-by: Seth Jennings <sjennings@variantweb.net>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Weijie Yang <weijie.yang@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dan Streetman 2014-08-06 16:08:38 -07:00 committed by Srinivasarao P
parent 5c7d1805de
commit f5321e895b

View file

@ -93,6 +93,7 @@
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/zsmalloc.h>
#include <linux/zpool.h>
/*
* This must be power of 2 and greater than of equal to sizeof(link_free).
@ -241,6 +242,82 @@ struct mapping_area {
enum zs_mapmode vm_mm; /* mapping mode */
};
/* zpool driver */
#ifdef CONFIG_ZPOOL
static void *zs_zpool_create(gfp_t gfp, struct zpool_ops *zpool_ops)
{
return zs_create_pool(gfp);
}
static void zs_zpool_destroy(void *pool)
{
zs_destroy_pool(pool);
}
static int zs_zpool_malloc(void *pool, size_t size, gfp_t gfp,
unsigned long *handle)
{
*handle = zs_malloc(pool, size);
return *handle ? 0 : -1;
}
static void zs_zpool_free(void *pool, unsigned long handle)
{
zs_free(pool, handle);
}
static int zs_zpool_shrink(void *pool, unsigned int pages,
unsigned int *reclaimed)
{
return -EINVAL;
}
static void *zs_zpool_map(void *pool, unsigned long handle,
enum zpool_mapmode mm)
{
enum zs_mapmode zs_mm;
switch (mm) {
case ZPOOL_MM_RO:
zs_mm = ZS_MM_RO;
break;
case ZPOOL_MM_WO:
zs_mm = ZS_MM_WO;
break;
case ZPOOL_MM_RW: /* fallthru */
default:
zs_mm = ZS_MM_RW;
break;
}
return zs_map_object(pool, handle, zs_mm);
}
static void zs_zpool_unmap(void *pool, unsigned long handle)
{
zs_unmap_object(pool, handle);
}
static u64 zs_zpool_total_size(void *pool)
{
return zs_get_total_size_bytes(pool);
}
static struct zpool_driver zs_zpool_driver = {
.type = "zsmalloc",
.owner = THIS_MODULE,
.create = zs_zpool_create,
.destroy = zs_zpool_destroy,
.malloc = zs_zpool_malloc,
.free = zs_zpool_free,
.shrink = zs_zpool_shrink,
.map = zs_zpool_map,
.unmap = zs_zpool_unmap,
.total_size = zs_zpool_total_size,
};
#endif /* CONFIG_ZPOOL */
/* per-cpu VM mapping areas for zspage accesses that cross page boundaries */
static DEFINE_PER_CPU(struct mapping_area, zs_map_area);
@ -814,6 +891,10 @@ static void zs_exit(void)
{
int cpu;
#ifdef CONFIG_ZPOOL
zpool_unregister_driver(&zs_zpool_driver);
#endif
cpu_notifier_register_begin();
for_each_online_cpu(cpu)
@ -840,6 +921,10 @@ static int zs_init(void)
cpu_notifier_register_done();
#ifdef CONFIG_ZPOOL
zpool_register_driver(&zs_zpool_driver);
#endif
return 0;
fail:
zs_exit();