linux-kernel - [PATCH 1/2] mm/memblock.c: trivial code refine in memblock_is_region

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Date:   Sun, 11 Dec 2016 12:59:49 +0000
From:   Wei Yang <richard.weiyang@...il.com>
To:     trivial@...nel.org, akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Wei Yang <richard.weiyang@...il.com>
Subject: [PATCH 1/2] mm/memblock.c: trivial code refine in memblock_is_region_memory()

The base address is already guaranteed to be in the region by
memblock_search().

This patch removes the check on base, also a little refine in a macro.

Signed-off-by: Wei Yang <richard.weiyang@...il.com>
---
 include/linux/memblock.h |    5 ++---
 mm/memblock.c            |    2 +-
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 3106ac1..e611819 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -408,9 +408,8 @@ static inline unsigned long memblock_region_reserved_end_pfn(const struct memblo
 	     region++)
 
 #define for_each_memblock_type(memblock_type, rgn)			\
-	idx = 0;							\
-	rgn = &memblock_type->regions[idx];				\
-	for (idx = 0; idx < memblock_type->cnt;				\
+	for (idx = 0, rgn = &memblock_type->regions[idx];		\
+	     idx < memblock_type->cnt;					\
 	     idx++,rgn = &memblock_type->regions[idx])
 
 #ifdef CONFIG_MEMTEST
diff --git a/mm/memblock.c b/mm/memblock.c
index ac12489..9d402d05 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1557,7 +1557,7 @@ int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size
 
 	if (idx == -1)
 		return 0;
-	return memblock.memory.regions[idx].base <= base &&
+	return /* memblock.memory.regions[idx].base <= base && */
 		(memblock.memory.regions[idx].base +
 		 memblock.memory.regions[idx].size) >= end;
 }
-- 
1.7.9.5