linux-kernel - -Wuninitialized warning in drivers/misc/sgi-xp/xpc

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Date:   Thu, 2 May 2019 20:33:40 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Cliff Whickman <cpw@....com>, Robin Holt <robinmholt@...il.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        clang-built-linux@...glegroups.com
Subject: -Wuninitialized warning in drivers/misc/sgi-xp/xpc_partition.c

Hi all,

When building with -Wuninitialized, Clang warns:

drivers/misc/sgi-xp/xpc_partition.c:73:14: warning: variable 'buf' is uninitialized when used within its own initialization [-Wuninitialized]
        void *buf = buf;
              ~~~   ^~~
1 warning generated.

I am not really sure how to properly initialize buf in this instance.
I would assume it would involve xpc_kmalloc_cacheline_aligned like
further down in the function but maybe not, this function isn't entirely
clear. Could we get your input, this is one of the last warnings I see
in a few allyesconfig builds.

Thanks,
Nathan