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由 Al Viro 提交于
Add missing ->i_mutex, convert to lookup_one_len() instead of (broken) open-coded analog, cope with getting something like a//b as relative pathname. Simplify the hell out of it, while we are there... Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Reviewed-by: NJeff Layton <jlayton@redhat.com>
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