pandora: defconfig: update

[pandora-kernel.git] / include / linux / bio.h

diff --git a/include/linux/bio.h b/include/linux/bio.h
index 847994a..e868554 100644 (file)
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -135,16 +135,27 @@ static inline int bio_has_allocated_vec(struct bio *bio)
 #define bio_io_error(bio) bio_endio((bio), -EIO)
 
 /*
- * drivers should not use the __ version unless they _really_ want to
- * run through the entire bio and not just pending pieces
+ * drivers should not use the __ version unless they _really_ know what
+ * they're doing
  */
 #define __bio_for_each_segment(bvl, bio, i, start_idx)                 \
        for (bvl = bio_iovec_idx((bio), (start_idx)), i = (start_idx);  \
             i < (bio)->bi_vcnt;                                        \
             bvl++, i++)
 
+/*
+ * drivers should _never_ use the all version - the bio may have been split
+ * before it got to the driver and the driver won't own all of it
+ */
+#define bio_for_each_segment_all(bvl, bio, i)                          \
+       for (i = 0;                                                     \
+            bvl = bio_iovec_idx((bio), (i)), i < (bio)->bi_vcnt;       \
+            i++)
+
 #define bio_for_each_segment(bvl, bio, i)                              \
-       __bio_for_each_segment(bvl, bio, i, (bio)->bi_idx)
+       for (i = (bio)->bi_idx;                                         \
+            bvl = bio_iovec_idx((bio), (i)), i < (bio)->bi_vcnt;       \
+            i++)
 
 /*
  * get a reference to a bio, so it won't disappear. the intended use is