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authorBen Hutchings <ben@decadent.org.uk>2018-07-12 00:18:22 +0100
committerWill Deacon <will.deacon@arm.com>2018-07-27 13:12:15 +0100
commitc5157101e7793b42a56e07368c7f4cb73fb58008 (patch)
tree14d157064055f0e368e54ff0d0ff047f9f0f2237 /arch/arm64/mm/flush.c
parent0b3e336601b82c6afa0e9cf21db9cb8793e25399 (diff)
downloadlinux-c5157101e7793b42a56e07368c7f4cb73fb58008.tar.bz2
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: 3ad0876554ca ("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>
Diffstat (limited to 'arch/arm64/mm/flush.c')
-rw-r--r--arch/arm64/mm/flush.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c
index 9786f9d5d3dc..30695a868107 100644
--- a/arch/arm64/mm/flush.c
+++ b/arch/arm64/mm/flush.c
@@ -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