diff options
| author | Zhang Zhen <zhenzhang.zhang@huawei.com> | 2014-12-12 16:55:33 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-13 12:42:47 -0800 |
| commit | 71fbd556adde2795787a6ca4c16871e57efba847 (patch) | |
| tree | a4302fe87369d15c20bcecd0b38d383af813cef8 /drivers/base/memory.c | |
| parent | 9dc00f4c4fdd1fab12a4da9a966e535b4284b0a4 (diff) | |
| download | linux-71fbd556adde2795787a6ca4c16871e57efba847.tar.bz2 | |
memory-hotplug: remove redundant call of page_to_pfn
This is just a small optimization. The start_pfn can be obtained directly
by phys_index << PFN_SECTION_SHIFT. So the call of page_to_pfn() is
redundant and remove it.
Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com>
Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Wang Nan <wangnan0@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/base/memory.c')
| -rw-r--r-- | drivers/base/memory.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/base/memory.c b/drivers/base/memory.c index 7c5d87191b28..85be040a21c8 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -228,8 +228,8 @@ memory_block_action(unsigned long phys_index, unsigned long action, int online_t struct page *first_page; int ret; - first_page = pfn_to_page(phys_index << PFN_SECTION_SHIFT); - start_pfn = page_to_pfn(first_page); + start_pfn = phys_index << PFN_SECTION_SHIFT; + first_page = pfn_to_page(start_pfn); switch (action) { case MEM_ONLINE: |