tree c9e1bf67bfedc04fb6e0b6840bd280198c300549
parent 30846090a746edfdb230deadd638cfa96f7b8c91
author Florian Westphal <fw@strlen.de> 1470921475 +0200
committer Steffen Klassert <steffen.klassert@secunet.com> 1470982031 +0200

xfrm: policy: use atomic_inc_not_zero in rcu section

If we don't hold the policy lock anymore the refcnt might
already be 0, i.e. policy struct is about to be free'd.

Switch to atomic_inc_not_zero to avoid this.

On removal policies are already unlinked from the tables (lists)
before the last _put occurs so we are not supposed to find the same
'dead' entry on the next loop, so its safe to just repeat the lookup.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>