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Subject[PATCH 05/39] lmb: Seperate region array from lmb_region struct
Date
lmb_init() will connect them back.
Add nr_regions in struct lmb_region to track region array size.

So later We can install dynamically allocated region array to that pointer

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
include/linux/lmb.h | 3 ++-
mm/lmb.c | 9 ++++++++-
2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/include/linux/lmb.h b/include/linux/lmb.h
index f3d1433..e14ea8d 100644
--- a/include/linux/lmb.h
+++ b/include/linux/lmb.h
@@ -26,7 +26,8 @@ struct lmb_property {
struct lmb_region {
unsigned long cnt;
u64 size;
- struct lmb_property region[MAX_LMB_REGIONS+1];
+ struct lmb_property *region;
+ unsigned long nr_regions;
};

struct lmb {
diff --git a/mm/lmb.c b/mm/lmb.c
index b1fc526..65b62dc 100644
--- a/mm/lmb.c
+++ b/mm/lmb.c
@@ -18,6 +18,8 @@
#define LMB_ALLOC_ANYWHERE 0

struct lmb lmb;
+static struct lmb_property lmb_memory_region[MAX_LMB_REGIONS + 1];
+static struct lmb_property lmb_reserved_region[MAX_LMB_REGIONS + 1];

static int lmb_debug;

@@ -106,6 +108,11 @@ static void lmb_coalesce_regions(struct lmb_region *rgn,

void __init lmb_init(void)
{
+ lmb.memory.region = lmb_memory_region;
+ lmb.reserved.region = lmb_reserved_region;
+ lmb.memory.nr_regions = ARRAY_SIZE(lmb_memory_region);
+ lmb.reserved.nr_regions = ARRAY_SIZE(lmb_reserved_region);
+
/* Create a dummy zero size LMB which will get coalesced away later.
* This simplifies the lmb_add() code below...
*/
@@ -169,7 +176,7 @@ static long lmb_add_region(struct lmb_region *rgn, u64 base, u64 size)

if (coalesced)
return coalesced;
- if (rgn->cnt >= MAX_LMB_REGIONS)
+ if (rgn->cnt > rgn->nr_regions)
return -1;

/* Couldn't coalesce the LMB, so add it to the sorted table. */
--
1.6.4.2


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