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-rw-r--r--include/linux/bvec.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index bd1e361b351c..f41c7f0ef91e 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -280,4 +280,18 @@ static inline void *bvec_virt(struct bio_vec *bvec)
return page_address(bvec->bv_page) + bvec->bv_offset;
}
+/**
+ * bvec_phys - return the physical address for a bvec
+ * @bvec: bvec to return the physical address for
+ */
+static inline phys_addr_t bvec_phys(const struct bio_vec *bvec)
+{
+ /*
+ * Note this open codes page_to_phys because page_to_phys is defined in
+ * <asm/io.h>, which we don't want to pull in here. If it ever moves to
+ * a sensible place we should start using it.
+ */
+ return PFN_PHYS(page_to_pfn(bvec->bv_page)) + bvec->bv_offset;
+}
+
#endif /* __LINUX_BVEC_H */