linux-kernel - [PATCH 08/35] x86,lmb: Add lmb_reserve_area/lmb_free

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Message-Id: <1273796396-29649-9-git-send-email-yinghai@kernel.org>
Date:	Thu, 13 May 2010 17:19:29 -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>
Cc:	David Miller <davem@...emloft.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 08/35] x86,lmb: Add lmb_reserve_area/lmb_free_area

they are wrappers for core versions.

they are taking start/end/name instead of base/size.

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_area and lmb_free_area 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@...nel.org>
---
 arch/x86/include/asm/lmb.h |    4 ++++
 arch/x86/mm/lmb.c          |   27 +++++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/lmb.h b/arch/x86/include/asm/lmb.h
index 2f06714..bc85c1e 100644
--- a/arch/x86/include/asm/lmb.h
+++ b/arch/x86/include/asm/lmb.h
@@ -6,4 +6,8 @@
 u64 lmb_find_area_size(u64 start, u64 *sizep, u64 align);
 void lmb_to_bootmem(u64 start, u64 end);
 
+void lmb_reserve_area(u64 start, u64 end, char *name);
+void lmb_free_area(u64 start, u64 end);
+void lmb_add_memory(u64 start, u64 end);
+
 #endif
diff --git a/arch/x86/mm/lmb.c b/arch/x86/mm/lmb.c
index 37a05e2..0dbe05b 100644
--- a/arch/x86/mm/lmb.c
+++ b/arch/x86/mm/lmb.c
@@ -117,3 +117,30 @@ void __init lmb_to_bootmem(u64 start, u64 end)
 	lmb.reserved.cnt = 0;
 }
 #endif
+
+void __init lmb_add_memory(u64 start, u64 end)
+{
+	lmb_add_region(&lmb.memory, start, end - start);
+}
+
+void __init lmb_reserve_area(u64 start, u64 end, char *name)
+{
+	if (start == end)
+		return;
+
+	if (WARN_ONCE(start > end, "lmb_reserve_area: wrong range [%#llx, %#llx]\n", start, end))
+		return;
+
+	lmb_add_region(&lmb.reserved, start, end - start);
+}
+
+void __init lmb_free_area(u64 start, u64 end)
+{
+	if (start == end)
+		return;
+
+	if (WARN_ONCE(start > end, "lmb_free_area: wrong range [%#llx, %#llx]\n", start, end))
+		return;
+
+	lmb_free(start, end - start);
+}
-- 
1.6.4.2

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