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https://github.com/joel16/android_kernel_sony_msm8994.git
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ec8c0446b6
Virtually index, physically tagged cache architectures can get away without cache flushing when forking. This patch adds a new cache flushing function flush_cache_dup_mm(struct mm_struct *) which for the moment I've implemented to do the same thing on all architectures except on MIPS where it's a no-op. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
#ifndef __ASM_SH64_CACHEFLUSH_H
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#define __ASM_SH64_CACHEFLUSH_H
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#ifndef __ASSEMBLY__
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#include <asm/page.h>
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struct vm_area_struct;
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struct page;
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struct mm_struct;
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extern void flush_cache_all(void);
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extern void flush_cache_mm(struct mm_struct *mm);
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extern void flush_cache_sigtramp(unsigned long start, unsigned long end);
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extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end);
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extern void flush_cache_page(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn);
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extern void flush_dcache_page(struct page *pg);
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extern void flush_icache_range(unsigned long start, unsigned long end);
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extern void flush_icache_user_range(struct vm_area_struct *vma,
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struct page *page, unsigned long addr,
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int len);
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#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
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#define flush_dcache_mmap_lock(mapping) do { } while (0)
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#define flush_dcache_mmap_unlock(mapping) do { } while (0)
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#define flush_cache_vmap(start, end) flush_cache_all()
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#define flush_cache_vunmap(start, end) flush_cache_all()
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#define flush_icache_page(vma, page) do { } while (0)
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#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
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do { \
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flush_cache_page(vma, vaddr, page_to_pfn(page));\
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memcpy(dst, src, len); \
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flush_icache_user_range(vma, page, vaddr, len); \
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} while (0)
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#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
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do { \
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flush_cache_page(vma, vaddr, page_to_pfn(page));\
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memcpy(dst, src, len); \
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} while (0)
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_SH64_CACHEFLUSH_H */
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