• Nick Piggin's avatar
    fs: dcache reduce branches in lookup path · fb045adb
    Nick Piggin authored
    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: default avatarNick Piggin <npiggin@kernel.dk>
vfs_inode.c 48.8 KB