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arm64: Defer dcache flush in __cpu_copy_user_page

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Defer dcache flushing to __sync_icache_dcache by calling
flush_dcache_page which clears PG_dcache_clean flag.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ashok Kumar <ashoks@broadcom.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Ashok Kumar 2015-12-17 01:38:31 -08:00 committed by Will Deacon
parent 971c67ce37
commit e6b1185f77
1 changed files with 2 additions and 1 deletions
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3
arch/arm64/mm/copypage.c
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@ -24,8 +24,9 @@
void __cpu_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr) void __cpu_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr)
{ {
struct page *page = virt_to_page(kto);
copy_page(kto, kfrom); copy_page(kto, kfrom);
__flush_dcache_area(kto, PAGE_SIZE); flush_dcache_page(page);
} }
EXPORT_SYMBOL_GPL(__cpu_copy_user_page); EXPORT_SYMBOL_GPL(__cpu_copy_user_page);