Commits
Maciej W. Rozycki committed 8b656253a7a
MIPS: Provide actually relaxed MMIO accessors Improve performance for the relevant systems and remove the DMA ordering barrier from `readX_relaxed' and `writeX_relaxed' MMIO accessors, where it is not needed according to our requirements[1]. For consistency make the same arrangement with low-level port I/O accessors, but do not actually provide any accessors making use of it. References: [1] "LINUX KERNEL MEMORY BARRIERS", Documentation/memory-barriers.txt, Section "KERNEL I/O BARRIER EFFECTS" Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Paul Burton <paul.burton@mips.com> Patchwork: https://patchwork.linux-mips.org/patch/20865/ Cc: Ralf Baechle <ralf@linux-mips.org>