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From: Yinghai Lu on 28 Mar 2010 23:00
It will return memory size in specified range according to lmb.memory.region

Try to share some code with lmb_free_memory_size() by passing get_free to
__lmb_memory_size().

Signed-off-by: Yinghai Lu <yinghai(a)kernel.org>
---
include/linux/lmb.h | 1 +
mm/lmb.c | 18 +++++++++++++++++-
2 files changed, 18 insertions(+), 1 deletions(-)

diff --git a/include/linux/lmb.h b/include/linux/lmb.h
index 51a8653..285f287 100644
--- a/include/linux/lmb.h
+++ b/include/linux/lmb.h
@@ -102,6 +102,7 @@ void lmb_register_active_regions(int nid, unsigned long start_pfn,
unsigned long last_pfn);
u64 lmb_hole_size(u64 start, u64 end);
u64 lmb_free_memory_size(u64 addr, u64 limit);
+u64 lmb_memory_size(u64 addr, u64 limit);

#include <asm/lmb.h>

diff --git a/mm/lmb.c b/mm/lmb.c
index 233c40d..f49d6c8 100644
--- a/mm/lmb.c
+++ b/mm/lmb.c
@@ -756,7 +756,7 @@ void __init lmb_to_bootmem(u64 start, u64 end)
}
#endif

-u64 __init lmb_free_memory_size(u64 addr, u64 limit)
+static u64 __init __lmb_memory_size(u64 addr, u64 limit, bool get_free)
{
int i, count;
struct range *range;
@@ -786,6 +786,10 @@ u64 __init lmb_free_memory_size(u64 addr, u64 limit)
}
subtract_range(range, count, 0, addr);
subtract_range(range, count, limit, -1ULL);
+
+ /* Subtract lmb.reserved.region in range ? */
+ if (!get_free)
+ goto sort_and_count_them;
for (i = 0; i < lmb.reserved.cnt; i++) {
struct lmb_property *r = &lmb.reserved.region[i];

@@ -798,6 +802,8 @@ u64 __init lmb_free_memory_size(u64 addr, u64 limit)

subtract_range(range, count, final_start, final_end);
}
+
+sort_and_count_them:
nr_range = clean_sort_range(range, count);

free_size = 0;
@@ -807,6 +813,16 @@ u64 __init lmb_free_memory_size(u64 addr, u64 limit)
return free_size << PAGE_SHIFT;
}

+u64 __init lmb_free_memory_size(u64 addr, u64 limit)
+{
+ return __lmb_memory_size(addr, limit, true);
+}
+
+u64 __init lmb_memory_size(u64 addr, u64 limit)
+{
+ return __lmb_memory_size(addr, limit, false);
+}
+
static int __init find_overlapped_early(u64 start, u64 end)
{
int i;
--
1.6.4.2

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Prev: [PATCH 15/31] lmb: Add find_lmb_area_node()
Next: [PATCH 10/31] lmb: Add lmb_to_bootmem()