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Diffstat (limited to '')
-rw-r--r-- | debian/patches/bugfix/arm/arm-mm-export-__sync_icache_dcache-for-xen-privcmd.patch | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/debian/patches/bugfix/arm/arm-mm-export-__sync_icache_dcache-for-xen-privcmd.patch b/debian/patches/bugfix/arm/arm-mm-export-__sync_icache_dcache-for-xen-privcmd.patch new file mode 100644 index 0000000000..cd5b36fa17 --- /dev/null +++ b/debian/patches/bugfix/arm/arm-mm-export-__sync_icache_dcache-for-xen-privcmd.patch @@ -0,0 +1,31 @@ +From: Ben Hutchings <ben@decadent.org.uk> +Date: Wed, 11 Jul 2018 23:40:55 +0100 +Subject: ARM: mm: Export __sync_icache_dcache() for xen-privcmd +Forwarded: https://lore.kernel.org/all/20180711225013.GF14131@decadent.org.uk/ + +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(). +However, in a non-LPAE configuration there is no "special" bit and the +call is really unconditional. + +Fixes: 3ad0876554ca ("xen/privcmd: add IOCTL_PRIVCMD_MMAP_RESOURCE") +Signed-off-by: Ben Hutchings <ben@decadent.org.uk> +--- + arch/arm/mm/flush.c | 1 + + 1 file changed, 1 insertion(+) + +Index: debian-kernel/arch/arm/mm/flush.c +=================================================================== +--- debian-kernel.orig/arch/arm/mm/flush.c ++++ debian-kernel/arch/arm/mm/flush.c +@@ -292,6 +292,7 @@ void __sync_icache_dcache(pte_t pteval) + if (pte_exec(pteval)) + __flush_icache_all(); + } ++EXPORT_SYMBOL_GPL(__sync_icache_dcache); + #endif + + /* |