[PATCH] arm: cmpxchg: update macro to prevent compiler warning

[Russell King - ARM Linux]

On Wed, Jun 17, 2015 at 05:37:36PM +0100, Andre Przywara wrote:
> In kernel/acct.c we call the cmpxchg() macro without using it's
> return value, so the compiler complains when compiling for ARM:

A fix is already queued, and has been queued since 26th May.

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