X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fbio.h;h=9e93c9299479054aa0273ff65b144c6f161b4719;hb=7a67f63b3233ff28e753854fe27891c44f8588ae;hp=0933a14e641423f523d8ed7a56ef7f2a6b849e5c;hpb=f1b0c8d3d3b5ff9c0b14bb2383a4bc38d8922bd1;p=linux-2.6-omap-h63xx.git

diff --git a/include/linux/bio.h b/include/linux/bio.h
index 0933a14e641..9e93c929947 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -445,6 +445,14 @@ static inline char *__bio_kmap_irq(struct bio *bio, unsigned short idx,
 	__bio_kmap_irq((bio), (bio)->bi_idx, (flags))
 #define bio_kunmap_irq(buf,flags)	__bio_kunmap_irq(buf, flags)
 
+/*
+ * Check whether this bio carries any data or not. A NULL bio is allowed.
+ */
+static inline int bio_has_data(struct bio *bio)
+{
+	return bio && bio->bi_io_vec != NULL;
+}
+
 #if defined(CONFIG_BLK_DEV_INTEGRITY)
 
 #define bip_vec_idx(bip, idx)	(&(bip->bip_vec[(idx)]))