linux-kernel - [PATCH 04/16] x86,memblock: Add memblock_x86_reserve_range/memblock_x86_free

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Date:	Thu, 22 Jul 2010 11:43:49 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Johannes Weiner <hannes@...xchg.org>, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 04/16] x86,memblock: Add memblock_x86_reserve_range/memblock_x86_free_range

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 memblock.default_alloc_limit according to Michael
      Ellerman and Ben
     change to memblock_x86_reserve_range and memblock_x86_free_range according to Michael Ellerman
-v3: call check_and_double after reserve/free, so could avoid to use
      find_memblock_area. Suggested by Michael Ellerman

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

diff --git a/arch/x86/include/asm/memblock.h b/arch/x86/include/asm/memblock.h
index 69cf853..e11ddf0 100644
--- a/arch/x86/include/asm/memblock.h
+++ b/arch/x86/include/asm/memblock.h
@@ -6,4 +6,7 @@
 u64 memblock_x86_find_in_range_size(u64 start, u64 *sizep, u64 align);
 void memblock_x86_to_bootmem(u64 start, u64 end);
 
+void memblock_x86_reserve_range(u64 start, u64 end, char *name);
+void memblock_x86_free_range(u64 start, u64 end);
+
 #endif
diff --git a/arch/x86/mm/memblock.c b/arch/x86/mm/memblock.c
index 7986a12..80cdcf8 100644
--- a/arch/x86/mm/memblock.c
+++ b/arch/x86/mm/memblock.c
@@ -116,3 +116,25 @@ void __init memblock_x86_to_bootmem(u64 start, u64 end)
 		memblock_reserve(__pa(memblock.reserved.regions), sizeof(struct memblock_region) * memblock.reserved.max);
 }
 #endif
+
+void __init memblock_x86_reserve_range(u64 start, u64 end, char *name)
+{
+	if (start == end)
+		return;
+
+	if (WARN_ONCE(start > end, "memblock_x86_reserve_range: wrong range [%#llx, %#llx]\n", start, end))
+		return;
+
+	memblock_reserve(start, end - start);
+}
+
+void __init memblock_x86_free_range(u64 start, u64 end)
+{
+	if (start == end)
+		return;
+
+	if (WARN_ONCE(start > end, "memblock_x86_free_range: wrong range [%#llx, %#llx]\n", start, end))
+		return;
+
+	memblock_free(start, end - start);
+}
-- 
1.6.4.2

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