Author: scottl
Date: Wed Jun 19 05:02:25 2013
New Revision: 251987
URL: http://svnweb.freebsd.org/changeset/base/251987
Log:
Poor man's binary compatibility of the struct bio: move the added structure
members to the end of the structure.
Obtained from: Netflix
Modified:
stable/9/sys/sys/bio.h
Modified: stable/9/sys/sys/bio.h
==============================================================================
--- stable/9/sys/sys/bio.h Wed Jun 19 04:57:47 2013 (r251986)
+++ stable/9/sys/sys/bio.h Wed Jun 19 05:02:25 2013 (r251987)
@@ -81,9 +81,6 @@ struct bio {
off_t bio_offset; /* Offset into file. */
long bio_bcount; /* Valid bytes in buffer. */
caddr_t bio_data; /* Memory, superblocks, indirect etc. */
- struct vm_page **bio_ma; /* Or unmapped. */
- int bio_ma_offset; /* Offset in the first page of bio_ma.
*/
- int bio_ma_n; /* Number of pages in bio_ma. */
int bio_error; /* Errno for BIO_ERROR. */
long bio_resid; /* Remaining I/O in bytes. */
void (*bio_done)(struct bio *);
@@ -116,6 +113,11 @@ struct bio {
/* XXX: these go away when bio chaining is introduced */
daddr_t bio_pblkno; /* physical block number */
+
+ /* Unmapped i/o. Placed at the end in 9.x for binary compatibility. */
+ struct vm_page **bio_ma; /* Physical page array. */
+ int bio_ma_offset; /* Offset in first page of bio_ma. */
+ int bio_ma_n; /* Number of pages in bio_ma. */
};
struct uio;
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