locking in fs/9p ->readdir()

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... is really excessive.  First of all, ->readdir() is serialized by
file->f_path.dentry->d_inode->i_mutex; playing with file->f_path.dentry->d_lock
is not buying you anything.  Moreover, rdir->mutex is pointless for exactly
the same reason - you'll never see contention on it.

	While we are at it, there's no point in having rdir->buf a pointer -
you have it point just past the end of rdir, so it might as well be a flex
array (and no, it's not a gccism).

	Absolutely untested patch follows:

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

...

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Al Viro 2013-01-26 00:11:36 +00:00 • committed by Eric Van Hensbergen

parent 836dc9e3fb

commit 7ffdea7ea3

1 changed files with 23 additions and 69 deletions

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fs/9p/vfs_dir.c

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