diff options
author | Jianyu Zhan <nasa4836@gmail.com> | 2014-01-21 15:49:12 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-21 16:19:44 -0800 |
commit | ece86e222db48d04bda218a2be70e384518bb08c (patch) | |
tree | 7cc9c61ca2f0f7112c2ed3698133aa559b6604ef /kernel/sysctl.c | |
parent | d80be7c75136fb58ed7264ac8a49dd917ace77a1 (diff) |
mm/vmalloc: interchage the implementation of vmalloc_to_{pfn,page}
Currently we are implementing vmalloc_to_pfn() as a wrapper around
vmalloc_to_page(), which is implemented as follow:
1. walks the page talbes to generates the corresponding pfn,
2. then converts the pfn to struct page,
3. returns it.
And vmalloc_to_pfn() re-wraps vmalloc_to_page() to get the pfn.
This seems too circuitous, so this patch reverses the way: implement
vmalloc_to_page() as a wrapper around vmalloc_to_pfn(). This makes
vmalloc_to_pfn() and vmalloc_to_page() slightly more efficient.
No functional change.
Signed-off-by: Jianyu Zhan <nasa4836@gmail.com>
Cc: Vladimir Murzin <murzin.v@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/sysctl.c')
0 files changed, 0 insertions, 0 deletions