1 files changed, 17 insertions, 0 deletions
diff --git a/target/linux/generic/patches-4.4/100-MIPS-fix-MT_SMP-cacheflush.patch b/target/linux/generic/patches-4.4/100-MIPS-fix-MT_SMP-cacheflush.patch
new file mode 100644
index 0000000000..14a10ba147
--- /dev/null
+++ b/target/linux/generic/patches-4.4/100-MIPS-fix-MT_SMP-cacheflush.patch
@@ -0,0 +1,17 @@
+Fix crash on cache flush with the MT_SMP variant
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+
+--- a/arch/mips/mm/c-r4k.c
++++ b/arch/mips/mm/c-r4k.c
+@@ -60,8 +60,10 @@ static inline void r4k_on_each_cpu(void
+ 	 * to restrict that call when a CM is not present because both
+ 	 * CM-based SMP protocols (CMP & CPS) restrict index-based cache ops.
+ 	 */
++#ifndef CONFIG_MIPS_MT_SMP
+ 	if (!mips_cm_present())
+ 		smp_call_function_many(&cpu_foreign_map, func, info, 1);
++#endif
+ 	func(info);
+ 	preempt_enable();
+ }