Commit c5157101 authored Jul 12, 2018 by Ben Hutchings Committed by Will Deacon Jul 27, 2018

arm64: mm: Export __sync_icache_dcache() for xen-privcmd



The xen-privcmd driver, which can be modular, calls set_pte_at()
which in turn may call __sync_icache_dcache().

The call to __sync_icache_dcache() may be optimised out because it is
conditional on !pte_special(), and xen-privcmd calls pte_mkspecial().
But it seems unwise to rely on this optimisation.

Fixes: 3ad08765 ("xen/privcmd: add IOCTL_PRIVCMD_MMAP_RESOURCE")
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Will Deacon <will.deacon@arm.com>

parent 0b3e3366

arch/arm64/mm/flush.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -66,6 +66,7 @@ void __sync_icache_dcache(pte_t pte)
		sync_icache_aliases(page_address(page),
		PAGE_SIZE << compound_order(page));
		}
		EXPORT_SYMBOL_GPL(__sync_icache_dcache);

		/*
		* This function is called when a page has been modified by the kernel. Mark

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