diff options
Diffstat (limited to 'arch/x86/include/asm/io.h')
| -rw-r--r-- | arch/x86/include/asm/io.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h index 30a3e9776123..0ad29d401565 100644 --- a/arch/x86/include/asm/io.h +++ b/arch/x86/include/asm/io.h @@ -41,6 +41,8 @@ #include <asm-generic/int-ll64.h> #include <asm/page.h> +#include <xen/xen.h> + #define build_mmio_read(name, size, type, reg, barrier) \ static inline type name(const volatile void __iomem *addr) \ { type ret; asm volatile("mov" size " %1,%0":reg (ret) \ @@ -349,6 +351,17 @@ extern void __iomem *early_memremap(resource_size_t phys_addr, extern void early_iounmap(void __iomem *addr, unsigned long size); extern void fixup_early_ioremap(void); +#ifdef CONFIG_XEN +struct bio_vec; + +extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1, + const struct bio_vec *vec2); + +#define BIOVEC_PHYS_MERGEABLE(vec1, vec2) \ + (__BIOVEC_PHYS_MERGEABLE(vec1, vec2) && \ + (!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2))) +#endif /* CONFIG_XEN */ + #define IO_SPACE_LIMIT 0xffff #endif /* _ASM_X86_IO_H */ |