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| author | John Dyson <dyson@FreeBSD.org> | 1995-11-19 22:22:35 +0000 |
|---|---|---|
| committer | John Dyson <dyson@FreeBSD.org> | 1995-11-19 22:22:35 +0000 |
| commit | 68a2196fadbbcfdd09ac98d9069d615b40f9f7a5 (patch) | |
| tree | 061a7602ced3c5c9d0ea539fff341a22dceeaeb7 /sys/sys/buf.h | |
| parent | fb9ca17e1e41e972937b7670988d08ec19b514a0 (diff) | |
| download | src-68a2196fadbbcfdd09ac98d9069d615b40f9f7a5.tar.gz src-68a2196fadbbcfdd09ac98d9069d615b40f9f7a5.zip | |
First set of changes to eliminate the ad-hoc device buffer queues,
replacing them with TAILQ's as appropriate. The SCSI code is the
first to be changed -- until the changes are complete, both b_act and
b_actf will be in the buf structure. b_actf will eventually be removed.
Notes
Notes:
svn path=/head/; revision=12408
Diffstat (limited to 'sys/sys/buf.h')
| -rw-r--r-- | sys/sys/buf.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/sys/buf.h b/sys/sys/buf.h index 9ba55c518d9d..ff39bfe1dcc1 100644 --- a/sys/sys/buf.h +++ b/sys/sys/buf.h @@ -36,7 +36,7 @@ * SUCH DAMAGE. * * @(#)buf.h 8.7 (Berkeley) 1/21/94 - * $Id: buf.h,v 1.21 1995/08/24 12:57:17 davidg Exp $ + * $Id: buf.h,v 1.22 1995/11/19 19:54:31 dyson Exp $ */ #ifndef _SYS_BUF_H_ @@ -57,6 +57,8 @@ struct iodone_chain { } ic_args[5]; }; +typedef TAILQ_HEAD(buf_queue_head, buf) buf_queue_head, *buf_queue_head_t; + /* * The buffer header describes an I/O operation in the kernel. */ @@ -64,7 +66,8 @@ struct buf { LIST_ENTRY(buf) b_hash; /* Hash chain. */ LIST_ENTRY(buf) b_vnbufs; /* Buffer's associated vnode. */ TAILQ_ENTRY(buf) b_freelist; /* Free list position if not active. */ - struct buf *b_actf, **b_actb; /* Device driver queue when active. */ + struct buf *b_actf, **b_actb; /* Device driver queue when active. *depricated* XXX */ + TAILQ_ENTRY(buf) b_act; /* Device driver queue when active. *new* */ struct proc *b_proc; /* Associated proc; NULL if kernel. */ volatile long b_flags; /* B_* flags. */ int b_qindex; /* buffer queue index */ |