v4.19.13 snapshot.
diff --git a/arch/sh/include/asm/cacheflush.h b/arch/sh/include/asm/cacheflush.h
new file mode 100644
index 0000000..b932e42
--- /dev/null
+++ b/arch/sh/include/asm/cacheflush.h
@@ -0,0 +1,112 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_SH_CACHEFLUSH_H
+#define __ASM_SH_CACHEFLUSH_H
+
+#ifdef __KERNEL__
+
+#include <linux/mm.h>
+
+/*
+ * Cache flushing:
+ *
+ * - flush_cache_all() flushes entire cache
+ * - flush_cache_mm(mm) flushes the specified mm context's cache lines
+ * - flush_cache_dup mm(mm) handles cache flushing when forking
+ * - flush_cache_page(mm, vmaddr, pfn) flushes a single page
+ * - flush_cache_range(vma, start, end) flushes a range of pages
+ *
+ * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
+ * - flush_icache_range(start, end) flushes(invalidates) a range for icache
+ * - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
+ * - flush_cache_sigtramp(vaddr) flushes the signal trampoline
+ */
+extern void (*local_flush_cache_all)(void *args);
+extern void (*local_flush_cache_mm)(void *args);
+extern void (*local_flush_cache_dup_mm)(void *args);
+extern void (*local_flush_cache_page)(void *args);
+extern void (*local_flush_cache_range)(void *args);
+extern void (*local_flush_dcache_page)(void *args);
+extern void (*local_flush_icache_range)(void *args);
+extern void (*local_flush_icache_page)(void *args);
+extern void (*local_flush_cache_sigtramp)(void *args);
+
+static inline void cache_noop(void *args) { }
+
+extern void (*__flush_wback_region)(void *start, int size);
+extern void (*__flush_purge_region)(void *start, int size);
+extern void (*__flush_invalidate_region)(void *start, int size);
+
+extern void flush_cache_all(void);
+extern void flush_cache_mm(struct mm_struct *mm);
+extern void flush_cache_dup_mm(struct mm_struct *mm);
+extern void flush_cache_page(struct vm_area_struct *vma,
+ unsigned long addr, unsigned long pfn);
+extern void flush_cache_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end);
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
+extern void flush_dcache_page(struct page *page);
+extern void flush_icache_range(unsigned long start, unsigned long end);
+extern void flush_icache_page(struct vm_area_struct *vma,
+ struct page *page);
+extern void flush_cache_sigtramp(unsigned long address);
+
+struct flusher_data {
+ struct vm_area_struct *vma;
+ unsigned long addr1, addr2;
+};
+
+#define ARCH_HAS_FLUSH_ANON_PAGE
+extern void __flush_anon_page(struct page *page, unsigned long);
+
+static inline void flush_anon_page(struct vm_area_struct *vma,
+ struct page *page, unsigned long vmaddr)
+{
+ if (boot_cpu_data.dcache.n_aliases && PageAnon(page))
+ __flush_anon_page(page, vmaddr);
+}
+static inline void flush_kernel_vmap_range(void *addr, int size)
+{
+ __flush_wback_region(addr, size);
+}
+static inline void invalidate_kernel_vmap_range(void *addr, int size)
+{
+ __flush_invalidate_region(addr, size);
+}
+
+#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
+static inline void flush_kernel_dcache_page(struct page *page)
+{
+ flush_dcache_page(page);
+}
+
+extern void copy_to_user_page(struct vm_area_struct *vma,
+ struct page *page, unsigned long vaddr, void *dst, const void *src,
+ unsigned long len);
+
+extern void copy_from_user_page(struct vm_area_struct *vma,
+ struct page *page, unsigned long vaddr, void *dst, const void *src,
+ unsigned long len);
+
+#define flush_cache_vmap(start, end) local_flush_cache_all(NULL)
+#define flush_cache_vunmap(start, end) local_flush_cache_all(NULL)
+
+#define flush_dcache_mmap_lock(mapping) do { } while (0)
+#define flush_dcache_mmap_unlock(mapping) do { } while (0)
+
+void kmap_coherent_init(void);
+void *kmap_coherent(struct page *page, unsigned long addr);
+void kunmap_coherent(void *kvaddr);
+
+#define PG_dcache_clean PG_arch_1
+
+void cpu_cache_init(void);
+
+static inline void *sh_cacheop_vaddr(void *vaddr)
+{
+ if (__in_29bit_mode())
+ vaddr = (void *)CAC_ADDR((unsigned long)vaddr);
+ return vaddr;
+}
+
+#endif /* __KERNEL__ */
+#endif /* __ASM_SH_CACHEFLUSH_H */