On Thu, Aug 06, 2015 at 05:54:36PM +0100, Will Deacon wrote:
> Hi all,
> The series adds support for a family of relaxed atomics to the kernel.
> More specifically:
>
> - acquire/release/relaxed flavours of xchg, cmpxchg and {add,sub}_return
> - atomic_read_acquire
> - atomic_set_release
>
> This came out of a separate patch series porting the (barrier-heavy)
> qrwlock code to arm64. Rather than have arch-specific hooks littered
> around the place, it makes more sense to define a core set of relaxed
> atomics that can be used regardless of architecture.
>
> Changes since v4 are:
>
> * Drop the ret_t macro parameter in favour of typeof tricks (Peter Z)
>
> * Add a missing acquire to the qrwlock code, as it was based on a
> previous patch that I posted (Waiman Long)
>
> Build tested on ARM, arm64, PowerPC and x86.
Queued it. There was a wee conflict with the atomic_{and,or,xor} bits
for the ARM patch, but that was quickly sorted.
Does we want a Documentation/ update to reflect all this shiny new
stuff?
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