forgotten refcount on sysctl root table
We should've set refcount on the root sysctl table; otherwise we'll blow up the first time we get down to zero dynamically registered sysctl tables. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Tested-by: NJames Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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