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-rw-r--r--include/asm-arm/cacheflush.h18
1 files changed, 15 insertions, 3 deletions
diff --git a/include/asm-arm/cacheflush.h b/include/asm-arm/cacheflush.h
index fe0c744e026..e4a2569c636 100644
--- a/include/asm-arm/cacheflush.h
+++ b/include/asm-arm/cacheflush.h
@@ -247,14 +247,12 @@ extern void dmac_flush_range(unsigned long, unsigned long);
*/
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
- flush_cache_page(vma, vaddr, page_to_pfn(page));\
memcpy(dst, src, len); \
- flush_dcache_page(page); \
+ flush_ptrace_access(vma, page, vaddr, dst, len, 1);\
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
do { \
- flush_cache_page(vma, vaddr, page_to_pfn(page));\
memcpy(dst, src, len); \
} while (0)
@@ -285,10 +283,24 @@ flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned l
__cpuc_flush_user_range(addr, addr + PAGE_SIZE, vma->vm_flags);
}
}
+
+static inline void
+flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
+ unsigned long uaddr, void *kaddr,
+ unsigned long len, int write)
+{
+ if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) {
+ unsigned long addr = (unsigned long)kaddr;
+ __cpuc_coherent_kern_range(addr, addr + len);
+ }
+}
#else
extern void flush_cache_mm(struct mm_struct *mm);
extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
extern void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned long pfn);
+extern void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
+ unsigned long uaddr, void *kaddr,
+ unsigned long len, int write);
#endif
/*