lkml.org 
[lkml]   [2020]   [May]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 11/31] arm64: use asm-generic/cacheflush.h
Date
ARM64 needs almost no cache flushing routines of its own.  Rely on
asm-generic/cacheflush.h for the defaults.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/arm64/include/asm/cacheflush.h | 46 ++++-------------------------
1 file changed, 5 insertions(+), 41 deletions(-)

diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h
index e6cca3d4acf70..03a5a187163ab 100644
--- a/arch/arm64/include/asm/cacheflush.h
+++ b/arch/arm64/include/asm/cacheflush.h
@@ -94,20 +94,7 @@ static inline void flush_icache_range(unsigned long start, unsigned long end)
#endif
kick_all_cpus_sync();
}
-
-static inline void flush_cache_mm(struct mm_struct *mm)
-{
-}
-
-static inline void flush_cache_page(struct vm_area_struct *vma,
- unsigned long user_addr, unsigned long pfn)
-{
-}
-
-static inline void flush_cache_range(struct vm_area_struct *vma,
- unsigned long start, unsigned long end)
-{
-}
+#define flush_icache_range flush_icache_range

/*
* Cache maintenance functions used by the DMA API. No to be used directly.
@@ -123,12 +110,7 @@ extern void __dma_flush_area(const void *, size_t);
*/
extern void copy_to_user_page(struct vm_area_struct *, struct page *,
unsigned long, void *, const void *, unsigned long);
-#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
- do { \
- memcpy(dst, src, len); \
- } while (0)
-
-#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
+#define copy_to_user_page copy_to_user_page

/*
* flush_dcache_page is used when the kernel has written to the page
@@ -154,29 +136,11 @@ static __always_inline void __flush_icache_all(void)
dsb(ish);
}

-#define flush_dcache_mmap_lock(mapping) do { } while (0)
-#define flush_dcache_mmap_unlock(mapping) do { } while (0)
-
-/*
- * We don't appear to need to do anything here. In fact, if we did, we'd
- * duplicate cache flushing elsewhere performed by flush_dcache_page().
- */
-#define flush_icache_page(vma,page) do { } while (0)
-
-/*
- * Not required on AArch64 (PIPT or VIPT non-aliasing D-cache).
- */
-static inline void flush_cache_vmap(unsigned long start, unsigned long end)
-{
-}
-
-static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
-{
-}
-
int set_memory_valid(unsigned long addr, int numpages, int enable);

int set_direct_map_invalid_noflush(struct page *page);
int set_direct_map_default_noflush(struct page *page);

-#endif
+#include <asm-generic/cacheflush.h>
+
+#endif /* __ASM_CACHEFLUSH_H */
--
2.26.2
\
 
 \ /
  Last update: 2020-05-10 09:58    [W:0.248 / U:0.528 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site