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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_GENERIC_CACHEFLUSH_H #define _ASM_GENERIC_CACHEFLUSH_H struct mm_struct; struct vm_area_struct; struct page; struct address_space; /* * The cache doesn't need to be flushed when TLB entries change when * the cache is mapped to physical memory, not virtual memory */ #ifndef flush_cache_all static inline void flush_cache_all(void) { } #endif #ifndef flush_cache_mm static inline void flush_cache_mm(struct mm_struct *mm) { } #endif #ifndef flush_cache_dup_mm static inline void flush_cache_dup_mm(struct mm_struct *mm) { } #endif #ifndef flush_cache_range static inline void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { } #endif #ifndef flush_cache_page static inline void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn) { } #endif #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE static inline void flush_dcache_page(struct page *page) { } #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 #endif #ifndef flush_dcache_mmap_lock static inline void flush_dcache_mmap_lock(struct address_space *mapping) { } #endif #ifndef flush_dcache_mmap_unlock static inline void flush_dcache_mmap_unlock(struct address_space *mapping) { } #endif #ifndef flush_icache_range static inline void flush_icache_range(unsigned long start, unsigned long end) { } #endif #ifndef flush_icache_user_range #define flush_icache_user_range flush_icache_range #endif #ifndef flush_icache_page static inline void flush_icache_page(struct vm_area_struct *vma, struct page *page) { } #endif #ifndef flush_icache_user_page static inline void flush_icache_user_page(struct vm_area_struct *vma, struct page *page, unsigned long addr, int len) { } #endif #ifndef flush_cache_vmap static inline void flush_cache_vmap(unsigned long start, unsigned long end) { } #endif #ifndef flush_cache_vunmap static inline void flush_cache_vunmap(unsigned long start, unsigned long end) { } #endif #ifndef copy_to_user_page #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ do { \ memcpy(dst, src, len); \ flush_icache_user_page(vma, page, vaddr, len); \ } while (0) #endif #ifndef copy_from_user_page #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ memcpy(dst, src, len) #endif #endif /* _ASM_GENERIC_CACHEFLUSH_H */