overlayfs: barriers for opening upper-layer directory

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make sure that
	a) all stores done by opening struct file don't leak past storing
the reference in od->upperfile
	b) the lockless side has read dependency barrier

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

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Al Viro 2014-10-28 18:27:28 -04:00

parent 54ef6df3f3

commit d45f00ae43

1 changed files with 2 additions and 1 deletions

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fs/overlayfs/readdir.c

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