From: Linus Torvalds <torvalds@g5.osdl.org>
Date: Mon, 26 Jun 2006 18:55:42 +0000 (-0700)
Subject: Revert "[PATCH] kthread: update loop.c to use kthread"
X-Git-Tag: v2.6.18-rc1~601
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=09c0dc68625c06f5b1e786aad0d5369b592179e6;p=pandora-kernel.git

Revert "[PATCH] kthread: update loop.c to use kthread"

This reverts commit c7b2eff059fcc2d1b7085ee3d84b79fd657a537b.

Hugh Dickins explains:

 "It seems too little tested: "losetup -d /dev/loop0" fails with
  EINVAL because nothing sets lo_thread; but even when you patch
  loop_thread() to set lo->lo_thread = current, it can't survive
  more than a few dozen iterations of the loop below (with a tmpfs
  mounted on /tst):

	j=0
	cp /dev/zero /tst
	while :
	do
	    let j=j+1
	    echo "Doing pass $j"
	    losetup /dev/loop0 /tst/zero
	    mkfs -t ext2 -b 1024 /dev/loop0 >/dev/null 2>&1
	    mount -t ext2 /dev/loop0 /mnt
	    umount /mnt
	    losetup -d /dev/loop0
	done

  it collapses with failed ioctl then BUG_ON(!bio).

  I think the original lo_done completion was more subtle and safe
  than the kthread conversion has allowed for."

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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