From patchwork series 424418

https://patchwork.ozlabs.org//project/linuxppc-dev/list/?series=424418

Author: Fox Snowpatch

arch/powerpc/Kconfig

@@ -176,6 +176,7 @@ config PPC
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
 	select ARCH_WANT_LD_ORPHAN_WARN
+	select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
 	select ARCH_WANT_OPTIMIZE_DAX_VMEMMAP	if PPC_RADIX_MMU
 	select ARCH_WANTS_MODULES_DATA_IN_VMALLOC	if PPC_BOOK3S_32 || PPC_8xx
 	select ARCH_WEAK_RELEASE_ACQUIRE

arch/powerpc/include/asm/tlbbatch.h

@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ARCH_PPC_TLBBATCH_H
+#define _ARCH_PPC_TLBBATCH_H
+
+struct arch_tlbflush_unmap_batch {
+	/*
+         *
+	 */
+};
+
+static inline void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch)
+{
+}
+
+static inline void arch_tlbbatch_add_pending(struct arch_tlbflush_unmap_batch *batch,
+						struct mm_struct *mm,
+						unsigned long uarddr)
+{
+}
+
+static inline bool arch_tlbbatch_should_defer(struct mm_struct *mm)
+{
+	/*ppc always do tlb flush in batch*/
+	return false;
+}
+
+static inline void arch_flush_tlb_batched_pending(struct mm_struct *mm)
+{
+}
+#endif /* _ARCH_PPC_TLBBATCH_H */