linux-kernel - [PATCH 04/11] memblock: Introduce memblock_set_current_limit

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Message-Id: <1377596268-31552-5-git-send-email-tangchen@cn.fujitsu.com>
Date:	Tue, 27 Aug 2013 17:37:41 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	rjw@...k.pl, lenb@...nel.org, tglx@...utronix.de, mingo@...e.hu,
	hpa@...or.com, akpm@...ux-foundation.org, tj@...nel.org,
	trenn@...e.de, yinghai@...nel.org, jiang.liu@...wei.com,
	wency@...fujitsu.com, laijs@...fujitsu.com,
	isimatu.yasuaki@...fujitsu.com, izumi.taku@...fujitsu.com,
	mgorman@...e.de, minchan@...nel.org, mina86@...a86.com,
	gong.chen@...ux.intel.com, vasilis.liaskovitis@...fitbricks.com,
	lwoodman@...hat.com, riel@...hat.com, jweiner@...hat.com,
	prarit@...hat.com, zhangyanfei@...fujitsu.com
Cc:	x86@...nel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-acpi@...r.kernel.org
Subject: [PATCH 04/11] memblock: Introduce memblock_set_current_limit_low() to set lower limit of memblock.

Corresponding to memblock_set_current_limit_high(), we introduce memblock_set_current_limit_low()
to set the lowest limit for memblock.

Signed-off-by: Tang Chen <tangchen@...fujitsu.com>
Reviewed-by: Zhang Yanfei <zhangyanfei@...fujitsu.com>
---
 include/linux/memblock.h |    9 ++++++++-
 mm/memblock.c            |    5 +++++
 2 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 40eb18e..cabd685 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -174,6 +174,14 @@ static inline void memblock_dump_all(void)
 }
 
 /**
+ * memblock_set_current_limit_low - Set the current allocation lower limit to
+ *                         allow limiting allocations to what is currently
+ *                         accessible during boot
+ * @limit: New lower limit value (physical address)
+ */
+void memblock_set_current_limit_low(phys_addr_t limit);
+
+/**
  * memblock_set_current_limit_high - Set the current allocation upper limit to
  *                         allow limiting allocations to what is currently
  *                         accessible during boot
@@ -181,7 +189,6 @@ static inline void memblock_dump_all(void)
  */
 void memblock_set_current_limit_high(phys_addr_t limit);
 
-
 /*
  * pfn conversion functions
  *
diff --git a/mm/memblock.c b/mm/memblock.c
index 0dd5387..54c1c2e 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -989,6 +989,11 @@ void __init_memblock memblock_trim_memory(phys_addr_t align)
 	}
 }
 
+void __init_memblock memblock_set_current_limit_low(phys_addr_t limit)
+{
+	memblock.current_limit_low = limit;
+}
+
 void __init_memblock memblock_set_current_limit_high(phys_addr_t limit)
 {
 	memblock.current_limit_high = limit;
-- 
1.7.1

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