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From: Yinghai Lu on 30 Mar 2010 07:40
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 b874dc0..8332934 100644
--- a/include/linux/lmb.h
+++ b/include/linux/lmb.h
@@ -101,6 +101,7 @@ 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 1a686ff..d0fa04d 100644
--- a/mm/lmb.c
+++ b/mm/lmb.c
@@ -747,7 +747,7 @@ 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;
@@ -777,6 +777,10 @@ 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];

@@ -789,6 +793,8 @@ 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;
@@ -798,6 +804,16 @@ 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);
+}
+
u64 __init __lmb_find_area(u64 ei_start, u64 ei_last, u64 start, u64 end,
u64 size, u64 align)
{
--
1.6.4.2

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Prev: [PATCH 11/29] lmb: Add find_memory_core_early()
Next: [PATCH 07/29] lmb: Add lmb_to_bootmem()