riscv: Improve zacas fully-ordered cmpxchg()

The current fully-ordered cmpxchgXX() implementation results in:

  amocas.X.rl     a5,a4,(s1)
  fence           rw,rw

This provides enough sync but we can actually use the following better
mapping instead:

  amocas.X.aqrl   a5,a4,(s1)

Suggested-by: Andrea Parri <[email protected]>
Signed-off-by: Alexandre Ghiti <[email protected]>
Reviewed-by: Andrew Jones <[email protected]>
Reviewed-by: Andrea Parri <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>

0 files changed, 0 insertions, 0 deletions