split read_seqretry_or_unlock(), convert d_walk() to resulting primitives

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Separate "check if we need to retry" from "unlock if we are done and
had seq_writelock"; that allows to use these guys in d_walk(), where
we need to recheck every time we ascend back to parent, but do *not*
want to unlock until the very end.  Lift rcu_read_lock/rcu_read_unlock
out into callers.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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Al Viro 2013-09-09 15:22:25 -04:00

parent 232d2d60aa

commit 48f5ec21d9

1 changed files with 31 additions and 33 deletions

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fs/dcache.c

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