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Date:   Sat, 13 Apr 2019 18:30:52 +0200
From:   Heinrich Schuchardt <>
To:     Russell King <>
Cc:,,, Heinrich Schuchardt <>
Subject: [PATCH 1/1] arm: mm: Export __sync_icache_dcache() for xen-privcmd

This patch avoids
ERROR: "__sync_icache_dcache" [drivers/xen/xen-privcmd.ko] undefined!
observed when compiling v4.19.34.

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

Signed-off-by: Heinrich Schuchardt <>
 arch/arm/mm/flush.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index 58469623b015..5345f86c56d2 100644
--- a/arch/arm/mm/flush.c
+++ b/arch/arm/mm/flush.c
@@ -295,6 +295,7 @@ void __sync_icache_dcache(pte_t pteval)
 	if (pte_exec(pteval))


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