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-rw-r--r--include/linux/bio.h3
-rw-r--r--include/linux/types.h6
2 files changed, 7 insertions, 2 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 711c321a701..092dbd0e765 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -70,7 +70,8 @@ typedef void (bio_destructor_t) (struct bio *);
* stacking drivers)
*/
struct bio {
- sector_t bi_sector;
+ sector_t bi_sector; /* device address in 512 byte
+ sectors */
struct bio *bi_next; /* request queue link */
struct block_device *bi_bdev;
unsigned long bi_flags; /* status, command, etc */
diff --git a/include/linux/types.h b/include/linux/types.h
index 406d4ae5763..750f085fa56 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -129,8 +129,12 @@ typedef __s64 int64_t;
/* this is a special 64bit data type that is 8-byte aligned */
#define aligned_u64 unsigned long long __attribute__((aligned(8)))
-/*
+/**
* The type used for indexing onto a disc or disc partition.
+ *
+ * Linux always considers sectors to be 512 bytes long independently
+ * of the devices real block size.
+ *
* If required, asm/types.h can override it and define
* HAVE_SECTOR_T
*/