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Eric Dumazet reports that getsockopt() or setsockopt() sometimes returns -EINTR instead of -ENOPROTOOPT, causing headaches to application developers. This patch replaces all the mutex_lock_interruptible() by mutex_lock() in the netfilter tree, as there is no reason we should sleep for a long time there. Reported-by: Eric Dumazet <[email protected]> Suggested-by: Patrick McHardy <[email protected]> Signed-off-by: Pablo Neira Ayuso <[email protected]> Acked-by: Julian Anastasov <[email protected]>