forked from Mirrors/opensbi
f520256d03
Currently, we have a smp_wmb() between atomic_raw_set_bit() and ipi_send() device callback whereas the MMIO writes done by the device ipi_send() callback will also include a barrier. We can avoid unnecessary/redundant barriers described above by allowing relaxed MMIO writes in device ipi_send() callback. To achieve this, we simply use wmb() instead of smp_wmb() before calling device ipi_send(). Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reported-by: Bo Gan <ganboing@gmail.com>