[BKPatch-2.5.8-pre2] Cleanup: Remove BH_Req

[Anton Altaparmakov <aia21@cus.cam.ac.uk>]

Linus,

I have noticed that BH_Req is not actually used for anything any more both
in 2.4 and 2.5 kernels. There are a handful of places that set/clear it
but no one tests for it so it seems to me it is a good target for removal.

Unless someone has sinister plans for BH_Req (in which case I expect them 
to scream NOW), please apply below patch which removes the no longer 
user BH_Req altogether from the kernel tree.

Best regards,

	Anton
-- 
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Linux NTFS maintainer / WWW: http://linux-ntfs.sf.net/
IRC: #ntfs on irc.openprojects.net / ICQ: 8561279
WWW: http://www-stu.christs.cam.ac.uk/~aia21/

--------bhreq.patch--------
You can import this changeset into BK by piping this whole message to:
'| bk receive [path to repository]' or apply the patch as usual.

===================================================================


ChangeSet@1.586, 2002-04-09 00:14:26+01:00, aia21@cam.ac.uk
  Remove BH_Req as it is no longer used for anything.


 drivers/block/ll_rw_blk.c     |    2 --
 drivers/md/raid5.c            |    2 +-
 fs/buffer.c                   |    2 --
 fs/jbd/transaction.c          |    1 -
 fs/reiserfs/tail_conversion.c |    1 -
 include/linux/fs.h            |    1 -
 6 files changed, 1 insertion(+), 8 deletions(-)


diff -Nru a/drivers/block/ll_rw_blk.c b/drivers/block/ll_rw_blk.c
--- a/drivers/block/ll_rw_blk.c	Tue Apr  9 00:22:36 2002
+++ b/drivers/block/ll_rw_blk.c	Tue Apr  9 00:22:36 2002
@@ -1396,8 +1396,6 @@
 	BUG_ON(!buffer_mapped(bh));
 	BUG_ON(!bh->b_end_io);
 
-	set_bit(BH_Req, &bh->b_state);
-
 	/*
 	 * from here on down, it's all bio -- do the initial mapping,
 	 * submit_bio -> generic_make_request may further map this bio around
diff -Nru a/drivers/md/raid5.c b/drivers/md/raid5.c
--- a/drivers/md/raid5.c	Tue Apr  9 00:22:36 2002
+++ b/drivers/md/raid5.c	Tue Apr  9 00:22:36 2002
@@ -472,7 +472,7 @@
 	/* FIXME - later we will need bdev here */
 	bh->b_blocknr   = block;
 
-	bh->b_state	= (1 << BH_Req) | (1 << BH_Mapped);
+	bh->b_state	= 1 << BH_Mapped;
 	bh->b_size	= sh->size;
 	bh->b_list	= BUF_LOCKED;
 	return bh;
diff -Nru a/fs/buffer.c b/fs/buffer.c
--- a/fs/buffer.c	Tue Apr  9 00:22:36 2002
+++ b/fs/buffer.c	Tue Apr  9 00:22:36 2002
@@ -1313,7 +1313,6 @@
 		bh->b_bdev = NULL;
 		clear_bit(BH_Uptodate, &bh->b_state);
 		clear_bit(BH_Mapped, &bh->b_state);
-		clear_bit(BH_Req, &bh->b_state);
 		clear_bit(BH_New, &bh->b_state);
 		remove_from_queues(bh);
 		unlock_buffer(bh);
@@ -1436,7 +1435,6 @@
 	if (old_bh) {
 		mark_buffer_clean(old_bh);
 		wait_on_buffer(old_bh);
-		clear_bit(BH_Req, &old_bh->b_state);
 		__brelse(old_bh);
 	}
 }
diff -Nru a/fs/jbd/transaction.c b/fs/jbd/transaction.c
--- a/fs/jbd/transaction.c	Tue Apr  9 00:22:36 2002
+++ b/fs/jbd/transaction.c	Tue Apr  9 00:22:36 2002
@@ -1862,7 +1862,6 @@
 	J_ASSERT_BH(bh, !buffer_jdirty(bh));
 	clear_bit(BH_Uptodate, &bh->b_state);
 	clear_bit(BH_Mapped, &bh->b_state);
-	clear_bit(BH_Req, &bh->b_state);
 	clear_bit(BH_New, &bh->b_state);
 	bh->b_bdev = NULL;
 	return may_free;
diff -Nru a/fs/reiserfs/tail_conversion.c b/fs/reiserfs/tail_conversion.c
--- a/fs/reiserfs/tail_conversion.c	Tue Apr  9 00:22:36 2002
+++ b/fs/reiserfs/tail_conversion.c	Tue Apr  9 00:22:36 2002
@@ -140,7 +140,6 @@
     mark_buffer_clean(bh) ;
     lock_buffer(bh) ;
     clear_bit(BH_Mapped, &bh->b_state) ;
-    clear_bit(BH_Req, &bh->b_state) ;
     clear_bit(BH_New, &bh->b_state) ;
     bh->b_bdev = NULL;
     unlock_buffer(bh) ;
diff -Nru a/include/linux/fs.h b/include/linux/fs.h
--- a/include/linux/fs.h	Tue Apr  9 00:22:36 2002
+++ b/include/linux/fs.h	Tue Apr  9 00:22:36 2002
@@ -215,7 +215,6 @@
 	BH_Uptodate,	/* 1 if the buffer contains valid data */
 	BH_Dirty,	/* 1 if the buffer is dirty */
 	BH_Lock,	/* 1 if the buffer is locked */
-	BH_Req,		/* 0 if the buffer has been invalidated */
 	BH_Mapped,	/* 1 if the buffer has a disk mapping */
 	BH_New,		/* 1 if the buffer is new and not yet written out */
 	BH_Async,	/* 1 if the buffer is under end_buffer_io_async I/O */

===================================================================


This BitKeeper patch contains the following changesets:
+
## Wrapped with gzip_uu ##


makepatch: ChangeSet |\b1 revisions
makepatch: fs/jbd/transaction.c |\b1 revisions
makepatch: fs/reiserfs/tail_conversion.c |\b1 revisions
makepatch: drivers/block/ll_rw_blk.c |\b1 revisions
makepatch: drivers/md/raid5.c |\b1 revisions
makepatch: fs/buffer.c |\b1 revisions
makepatch: include/linux/fs.h |\b1 revisions
makepatch: patch contains 7 revisions from 7 files
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