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authorWei Yang <richard.weiyang@gmail.com>2017-02-22 15:45:04 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-22 16:41:29 -0800
commitef415ef41153b747031e8ad965cb3df4f22ff72e (patch)
treef1fe360440def0dff05ae3e60a101c11b4d56d41 /mm/memblock.c
parent399d8eebe768fe3ae648700547d04f2a8796a4da (diff)
downloadop-kernel-dev-ef415ef41153b747031e8ad965cb3df4f22ff72e.zip
op-kernel-dev-ef415ef41153b747031e8ad965cb3df4f22ff72e.tar.gz
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@gmail.com Signed-off-by: Wei Yang <richard.weiyang@gmail.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memblock.c')
-rw-r--r--mm/memblock.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index a476d28..90171d5 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1640,8 +1640,7 @@ 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 &&
- (memblock.memory.regions[idx].base +
+ return (memblock.memory.regions[idx].base +
memblock.memory.regions[idx].size) >= end;
}
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