The patch titled
Subject: mm/memblock.c: trivial code refine in memblock_is_region_memory()
has been added to the -mm tree. Its filename is
mm-memblockc-trivial-code-refine-in-memblock_is_region_memory.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memblockc-trivial-code-refine-in-memblock_is_region_memory.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memblockc-trivial-code-refine-in-memblock_is_region_memory.patch
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------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: mm/memblock.c: trivial code refine in memblock_is_region_memory()
memblock_is_region_memory() invoke memblock_search() to see whether the
base address is in the memory region. If it fails, idx would be -1. Then,
it returns 0.
If the memblock_search() returns a valid index, it means the base address
is guaranteed to be in the range memblock.memory.regions[idx]. Because of
this, it is not necessary to check the base again.
This patch removes the check on "base".
Link: http://lkml.kernel.org/r/1482363033-24754-2-git-send-email-richard.weiyang@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memblock.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff -puN mm/memblock.c~mm-memblockc-trivial-code-refine-in-memblock_is_region_memory mm/memblock.c
--- a/mm/memblock.c~mm-memblockc-trivial-code-refine-in-memblock_is_region_memory
+++ a/mm/memblock.c
@@ -1640,8 +1640,7 @@ int __init_memblock memblock_is_region_m
if (idx == -1)
return 0;
- return memblock.memory.regions[idx].base <= base &&
- (memblock.memory.regions[idx].base +
+ return (memblock.memory.regions[idx].base +
memblock.memory.regions[idx].size) >= end;
}
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
mm-memblockc-trivial-code-refine-in-memblock_is_region_memory.patch
mm-memblockc-check-return-value-of-memblock_reserve-in-memblock_virt_alloc_internal.patch
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