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-rw-r--r--include/linux/bio.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 1beda208cbf..1c91a176b9a 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -79,6 +79,13 @@ struct bio {
unsigned int bi_size; /* residual I/O count */
+ /*
+ * To keep track of the max segment size, we account for the
+ * sizes of the first and last mergeable segments in this bio.
+ */
+ unsigned int bi_seg_front_size;
+ unsigned int bi_seg_back_size;
+
unsigned int bi_max_vecs; /* max bvl_vecs we can hold */
unsigned int bi_comp_cpu; /* completion CPU */