• John Stultz's avatar
    net: Explicitly initialize u64_stats_sync structures for lockdep · 827da44c
    John Stultz authored
    In order to enable lockdep on seqcount/seqlock structures, we
    must explicitly initialize any locks.
    
    The u64_stats_sync structure, uses a seqcount, and thus we need
    to introduce a u64_stats_init() function and use it to initialize
    the structure.
    
    This unfortunately adds a lot of fairly trivial initialization code
    to a number of drivers. But the benefit of ensuring correctness makes
    this worth while.
    
    Because these changes are required for lockdep to be enabled, and the
    changes are quite trivial, I've not yet split this patch out into 30-some
    separate patches, as I figured it would be better to get the various
    maintainers thoughts on how to best merge this change along with
    the seqcount lockdep enablement.
    
    Feedback would be appreciated!
    Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
    Acked-by: default avatarJulian Anastasov <ja@ssi.bg>
    Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
    Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
    Cc: "David S. Miller" <davem@davemloft.net>
    Cc: Eric Dumazet <eric.dumazet@gmail.com>
    Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
    Cc: James Morris <jmorris@namei.org>
    Cc: Jesse Gross <jesse@nicira.com>
    Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
    Cc: "Michael S. Tsirkin" <mst@redhat.com>
    Cc: Mirko Lindner <mlindner@marvell.com>
    Cc: Patrick McHardy <kaber@trash.net>
    Cc: Roger Luethi <rl@hellgate.ch>
    Cc: Rusty Russell <rusty@rustcorp.com.au>
    Cc: Simon Horman <horms@verge.net.au>
    Cc: Stephen Hemminger <stephen@networkplumber.org>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
    Cc: Wensong Zhang <wensong@linux-vs.org>
    Cc: netdev@vger.kernel.org
    Link: http://lkml.kernel.org/r/1381186321-4906-2-git-send-email-john.stultz@linaro.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    827da44c
loopback.c 5.65 KB