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Diffstat (limited to 'arch/x86/include/asm')
-rw-r--r--arch/x86/include/asm/io.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index e5a2ab44cd5c..4f8e820cf38f 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -125,7 +125,7 @@ static inline void *phys_to_virt(phys_addr_t address)
/*
* ISA I/O bus memory addresses are 1:1 with the physical address.
*/
-#define isa_virt_to_bus virt_to_phys
+#define isa_virt_to_bus (unsigned long)virt_to_phys
#define isa_page_to_bus page_to_phys
#define isa_bus_to_virt phys_to_virt