tree 4631c01eb33d6f8bbcf018f47d31d19ad4fac5a4
parent 5ff0d16aac91857246770f477942878a4d4f31f7
author Herbert Xu <herbert@gondor.apana.org.au> 1426158469 +1100
committer David S. Miller <davem@davemloft.net> 1426215750 -0400

rhashtable: Fix reader/rehash race

There is a potential race condition between readers and the rehasher.
In particular, the rehasher could have started a rehash while the
reader finishes a scan of the old table but fails to see the new
table pointer.

This patch closes this window by adding smp_wmb/smp_rmb.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>