[PATCH 11/25] x86,lmb: Add lmb_reserve_range/lmb_free_range

[Yinghai Lu <yinghai@kernel.org>]

they are wrappers for core versions.
they are taking start/end/name instead of base/size.
will make x86 conversion more easy

could add more debug print out

-v2: change get_max_mapped() to lmb.default_alloc_limit according to Michael
      Ellerman and Ben
     change to lmb_reserve_range and lmb_free_range according to Michael Ellerman
-v3: call check_and_double after reserve/free, so could avoid to use
      find_lmb_area. Suggested by Michael Ellerman

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 arch/x86/include/asm/lmb.h |    3 +++
 arch/x86/mm/lmb.c          |   22 ++++++++++++++++++++++
 2 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/lmb.h b/arch/x86/include/asm/lmb.h
index e8207f8..70df84f 100644
--- a/arch/x86/include/asm/lmb.h
+++ b/arch/x86/include/asm/lmb.h
@@ -6,4 +6,7 @@
 u64 lmb_find_in_range_size(u64 start, u64 *sizep, u64 align);
 void lmb_to_bootmem(u64 start, u64 end);
 
+void lmb_reserve_range(u64 start, u64 end, char *name);
+void lmb_free_range(u64 start, u64 end);
+
 #endif
diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
index a959699..6b6cc58 100644
--- a/arch/x86/mm/lmb.c
+++ b/arch/x86/mm/lmb.c
@@ -116,3 +116,25 @@ void __init lmb_to_bootmem(u64 start, u64 end)
 		lmb_reserve(__pa(lmb.reserved.regions), sizeof(struct lmb_region) * lmb.reserved.max);
 }
 #endif
+
+void __init lmb_reserve_range(u64 start, u64 end, char *name)
+{
+	if (start == end)
+		return;
+
+	if (WARN_ONCE(start > end, "lmb_reserve_range: wrong range [%#llx, %#llx]\n", start, end))
+		return;
+
+	lmb_reserve(start, end - start);
+}
+
+void __init lmb_free_range(u64 start, u64 end)
+{
+	if (start == end)
+		return;
+
+	if (WARN_ONCE(start > end, "lmb_free_range: wrong range [%#llx, %#llx]\n", start, end))
+		return;
+
+	lmb_free(start, end - start);
+}
-- 
1.6.4.2