block: Add bio_max_segs

[linux-2.6-microblaze.git] / include / linux / bio.h

diff --git a/include/linux/bio.h b/include/linux/bio.h
index 5b468f2..983ed2f 100644 (file)
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -20,7 +20,12 @@
 #define BIO_BUG_ON
 #endif
 
-#define BIO_MAX_PAGES          256
+#define BIO_MAX_PAGES          256U
+
+static inline unsigned int bio_max_segs(unsigned int nr_segs)
+{
+       return min(nr_segs, BIO_MAX_PAGES);
+}
 
 #define bio_prio(bio)                  (bio)->bi_ioprio
 #define bio_set_prio(bio, prio)                ((bio)->bi_ioprio = prio)