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UPSTREAM: 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>

Bug: 30369029
Patchset: rework-pagetable

(cherry picked from commit e6b1185f77)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: I2e02ce2f43f68287337bed30e3c3455c0eee4164
This commit is contained in:
Ashok Kumar
2015-12-17 01:38:31 -08:00
committed by Jeff Vander Stoep
parent 41b7e19e9b
commit b10551a353
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)
{
struct page *page = virt_to_page(kto);
copy_page(kto, kfrom);
__flush_dcache_area(kto, PAGE_SIZE);
flush_dcache_page(page);
}
EXPORT_SYMBOL_GPL(__cpu_copy_user_page);