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path: root/target/linux/ar71xx/patches/902-mips_clocksource_init_war.patch
blob: 0f1bc95ada1dca1e8976e3d25c951c3addb6cef0 (plain)
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--- a/include/asm-mips/hazards.h
+++ b/include/asm-mips/hazards.h
@@ -64,7 +64,7 @@
 	_ehb
 	)
 ASMMACRO(back_to_back_c0_hazard,
-	 _ehb
+	 _ssnop; _ssnop; _ssnop; _ehb
 	)
 /*
  * gcc has a tradition of misscompiling the previous construct using the
--- a/arch/mips/kernel/cevt-r4k.c
+++ b/arch/mips/kernel/cevt-r4k.c
@@ -187,7 +187,7 @@
 	 */
 	if (c0_compare_int_pending()) {
 		write_c0_compare(read_c0_count());
-		irq_disable_hazard();
+		back_to_back_c0_hazard();		
 		if (c0_compare_int_pending())
 			return 0;
 	}
@@ -196,7 +196,7 @@
 		cnt = read_c0_count();
 		cnt += delta;
 		write_c0_compare(cnt);
-		irq_disable_hazard();
+		back_to_back_c0_hazard();		
 		if ((int)(read_c0_count() - cnt) < 0)
 		    break;
 		/* increase delta if the timer was already expired */
@@ -205,11 +205,12 @@
 	while ((int)(read_c0_count() - cnt) <= 0)
 		;	/* Wait for expiry  */
 
+	back_to_back_c0_hazard();
 	if (!c0_compare_int_pending())
 		return 0;
 
 	write_c0_compare(read_c0_count());
-	irq_disable_hazard();
+	back_to_back_c0_hazard();		
 	if (c0_compare_int_pending())
 		return 0;