Re: [PATCH net-next] cgroup: fix sock_cgroup_data initialization on earlier compilers

[David Miller <davem@davemloft.net>]

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From: Tejun Heo <tj@kernel.org>
Date: Wed, 9 Dec 2015 12:30:46 -0500

> sock_cgroup_data is a struct containing an anonymous union.
> sock_cgroup_set_prioidx() and sock_cgroup_set_classid() were
> initializing a field inside the anonymous union as follows.
> 
>  struct sock_ccgroup_data skcd_buf = { .val = VAL };
> 
> While this is fine on more recent compilers, gcc-4.4.7 triggers the
> following errors.
> 
>  include/linux/cgroup-defs.h: In function ¡sock_cgroup_set_prioidx¢:
>  include/linux/cgroup-defs.h:619: error: unknown field ¡val¢ specified in initializer
>  include/linux/cgroup-defs.h:619: warning: missing braces around initializer
>  include/linux/cgroup-defs.h:619: warning: (near initialization for ¡skcd_buf.<anonymous>¢)
> 
> This is because .val belongs to the anonymous union nested inside the
> struct but the initializer is missing the nesting.  Fix it by adding
> an extra pair of braces.
> 
> Signed-off-by: Tejun Heo <tj@kernel.org>
> Reported-by: Alaa Hleihel <alaa@dev.mellanox.co.il>
> Fixes: bd1060a1d671 ("sock, cgroup: add sock->sk_cgroup")

Applied, thanks.
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