tree 1fd6a4024fffeec568abe100d730589bfdb81c38
parent 5f57cbcc02cf18f6b22ef4066bb10afeb8f930ff
author Nick Piggin <npiggin@kernel.dk> 1294382995 +1100
committer Nick Piggin <npiggin@kernel.dk> 1294383028 +1100

fs: dcache reduce branches in lookup path

Reduce some branches and memory accesses in dcache lookup by adding dentry
flags to indicate common d_ops are set, rather than having to check them.
This saves a pointer memory access (dentry->d_op) in common path lookup
situations, and saves another pointer load and branch in cases where we
have d_op but not the particular operation.

Patched with:

git grep -E '[.>]([[:space:]])*d_op([[:space:]])*=' | xargs sed -e 's/\([^\t ]*\)->d_op = \(.*\);/d_set_d_op(\1, \2);/' -e 's/\([^\t ]*\)\.d_op = \(.*\);/d_set_d_op(\&\1, \2);/' -i

Signed-off-by: Nick Piggin <npiggin@kernel.dk>