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authorDavid S. Miller <davem@davemloft.net>2008-09-11 23:36:32 -0700
committerDavid S. Miller <davem@davemloft.net>2008-09-11 23:36:32 -0700
commitb0f1e7962f93a78630161c7c9fc263de43c101ac (patch)
treee08a62bdbee47a327f6d80b3d83942f6b7eb9941 /arch/sparc64
parent17f04fbb0f7153d95ec33da81189b113cc778157 (diff)
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/sparc64')
0 files changed, 0 insertions, 0 deletions