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| author | David S. Miller <davem@davemloft.net> | 2008-09-11 23:36:32 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-09-11 23:36:32 -0700 |
| commit | b0f1e7962f93a78630161c7c9fc263de43c101ac (patch) | |
| tree | e08a62bdbee47a327f6d80b3d83942f6b7eb9941 /arch/sparc/include/asm/auxio_32.h | |
| parent | 17f04fbb0f7153d95ec33da81189b113cc778157 (diff) | |
| download | blackbird-op-linux-b0f1e7962f93a78630161c7c9fc263de43c101ac.tar.gz blackbird-op-linux-b0f1e7962f93a78630161c7c9fc263de43c101ac.zip | |
sparc64: Define WANT_PAGE_VIRTUAL
As sparse warns, without this struct page pointer subtraction is
extremely expensive, and this is a pretty common operation in
fast paths.
With this define struct page becomes 64 bytes which makes for a
simple subtract and shift, instead of a costly divide or reciprocol
multiply.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include/asm/auxio_32.h')
0 files changed, 0 insertions, 0 deletions
