Re: [PATCH,RFC] initrd vs. BLKFLSBUF

From: Jeff Chua (jeffchua@silk.corp.fedex.com)
Date: Mon Dec 11 2000 - 06:59:00 EST

I'm posting this again hoping that it'll get incorporated into the kernel.

I've tested the patch against 2.4.0-test12-pre8, and it's working fine.

Thanks,
Jeff
[ jchua@fedex.com ]
----- Original Message -----
From: "Werner Almesberger" <Werner.Almesberger@epfl.ch>
To: <viro@math.psu.edu>
Cc: <jchua@fedex.com>; <linux-kernel@vger.kernel.org>
Sent: Monday, November 20, 2000 11:21 AM
Subject: [PATCH,RFC] initrd vs. BLKFLSBUF

Hi Al,

Jeff Chua reported a while ago that BLKFLSBUF returns EBUSY on a RAM disk
that was obtained via initrd. I think the problem is that the effect of
the blkdev_open(out_inode, ...) in drivers/block/rd.c:rd_load_image is
not undone at the end. I've attached a patch for 2.4.0-test11-pre7 that
seems to solve the problem. Since I'm not quite sure I understand the
reference counting rules there, I would appreciate your comment.

Thanks,
- Werner

---------------------------------- cut
here -----------------------------------

--- linux.orig/drivers/block/rd.c Mon Nov 20 02:07:47 2000
+++ linux/drivers/block/rd.c Mon Nov 20 04:03:42 2000
@@ -690,6 +690,7 @@
 done:
  if (infile.f_op->release)
  infile.f_op->release(inode, &infile);
+ blkdev_put(out_inode->i_bdev, BDEV_FILE);
  set_fs(fs);
  return;
 free_inodes: /* free inodes on error */ 

--
  _________________________________________________________________________
 / Werner Almesberger, ICA, EPFL, CH           Werner.Almesberger@epfl.ch /
/_IN_N_032__Tel_+41_21_693_6621__Fax_+41_21_693_6610_____________________/

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