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-rw-r--r--include/linux/bio.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 87ce64d..fe9a170 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -63,6 +63,12 @@
#define bio_end_sector(bio) ((bio)->bi_iter.bi_sector + bio_sectors((bio)))
/*
+ * Return the data direction, READ or WRITE.
+ */
+#define bio_data_dir(bio) \
+ (op_is_write(bio_op(bio)) ? WRITE : READ)
+
+/*
* Check whether this bio carries any data or not. A NULL bio is allowed.
*/
static inline bool bio_has_data(struct bio *bio)
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