ARC: use ACCESS_ONCE in cmpxchg loop (7082a29c) · Commits · e / devices / android_kernel_fairphone_FP3

arch/arc/kernel/smp.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -221,7 +221,7 @@ static void ipi_send_msg_one(int cpu, enum ipi_msg_type msg)
		* and read back old value
		*/
		do {
		new = old = *ipi_data_ptr;
		new = old = ACCESS_ONCE(*ipi_data_ptr);
		new \|= 1U << msg;
		} while (cmpxchg(ipi_data_ptr, old, new) != old);