[lttng-dev] (no subject)

["Ondřej Surý via lttng-dev" <lttng-dev@lists.lttng.org>]

This is a second round of the patches after implementing the requested changes
from the first round.

Ondrej

[PATCH 1/7] Require __atomic builtins to build
- no changes

[PATCH 2/7] Use gcc __atomic builtis for <urcu/uatomic.h>
- the non return macros are now __ATOMIC_RELAXED
- the return macros are now __ATOMIC_SEQ_CST
- the memory barriers are now

[PATCH 3/7] Use __atomic_signal_fence() for cmm_barrier()
- this now uses __atomic_signal_fence() instead of __atomic_thread_fence()

[PATCH 4/7] Replace the internal pointer manipulation with __atomic
- changed the memory ordering to __ATOMIC_SEQ_CST for xchg and cmpxchg 

[PATCH 5/7] Replace the arch-specific memory barriers with __atomic
- dropped the changes to urcu/arch.h
- removed all custom cmm_*() macros from urcu/arch/*.h
- added the generic __atomic implementation to urcu/arch/generic.h

This was it's still possible to override the generics with arch specific macros.

[PATCH 6/7] Use __atomic builtins to implement CMM_{LOAD,STORE}_SHARED
- _CMM_STORE_SHARED and CMM_STORE_SHARED now returns the stored value

[PATCH 7/7] Fix: uatomic_or() need retyping to uintptr_t in
- no changes

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