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ab518eea9c
ndk-busybox/util-linux
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Denys Vlasenko ab518eea9c mount: create loop devices with LO_FLAGS_AUTOCLEAR flag 
The "autolooped" mount (mount [-oloop] IMAGE /DIR/DIR)
always creates AUTOCLEARed loopdevs, so that umounting
drops them (and this does not require any code in the
umount userspace).
This happens since circa linux-2.6.25:
	commit 96c5865559cee0f9cbc5173f3c949f6ce3525581
	Date:    Wed Feb 6 01:36:27 2008 -0800
	Subject: Allow auto-destruction of loop devices
IOW: in this case, umount does not have to use -d
to drop the loopdev.

The explicit loop mount (mount /dev/loopN /DIR/DIR)
does not do this. In this case, umount without -d
should not drop loopdev.
Unfortunately, bbox umount currently always implies -d,
this probably needs fixing.

function                                             old     new   delta
set_loop                                             537     597     +60
singlemount                                         1101    1138     +37
losetup_main                                         419     432     +13
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 110/0)             Total: 110 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-03-16 16:55:47 +01:00
..
volume_id Big cleanup in config help and description 2017-01-10 14:58:54 +01:00
acpid.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
blkdiscard.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
blkid.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
blockdev.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
Config.src Big cleanup in config help and description 2017-01-10 14:58:54 +01:00
dmesg.c Big cleanup in config help and description 2017-01-10 14:58:54 +01:00
fatattr.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
fbset.c Big cleanup in config help and description 2017-01-10 14:58:54 +01:00
fdformat.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
fdisk_aix.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
fdisk_gpt.c fdisk_gpt: simplify GPT partition name printing 2016-11-27 20:47:01 +01:00
fdisk_osf.c randomconfig fixes 2016-06-19 18:15:33 +02:00
fdisk_sgi.c randomconfig fixes 2016-06-19 18:15:33 +02:00
fdisk_sun.c fdisk_sun: fix partition alignment 2013-02-11 00:22:59 +01:00
fdisk.c fdisk: add typical values of -H and -S to --help 2017-01-19 14:29:42 +01:00
findfs.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
flock.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
freeramdisk.c *: add comment about APPLET_ODDNAME format 2017-01-29 14:57:33 +01:00
fsck_minix.c libbb: consolidate the code to set termios unbuffered mode 2017-01-11 16:17:59 +01:00
fstrim.c make --help texts more uniform 2017-01-21 02:49:58 +01:00
getopt.c make --help texts more uniform 2017-01-21 02:49:58 +01:00
hexdump_xxd.c xxd: make -p output lines actually end with a newline 2017-01-25 17:00:38 +01:00
hexdump.c xxd: implement -p 2017-01-25 16:50:30 +01:00
hwclock.c Big cleanup in config help and description 2017-01-10 14:58:54 +01:00
ipcrm.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
ipcs.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
Kbuild.src Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
losetup.c mount: create loop devices with LO_FLAGS_AUTOCLEAR flag 2017-03-16 16:55:47 +01:00
lspci.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
lsusb.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
mdev.c mdev: create devices from /sys/dev 2016-09-07 14:09:01 +02:00
minix.h more bionic fixes 2016-03-14 19:34:15 +01:00
mkfs_ext2_test.sh mkfs_ext2: use compatible inode sizes; add -I <inodesize>. (by Vladimir) 2009-10-22 12:12:17 +02:00
mkfs_ext2.c *: add comment about APPLET_ODDNAME format 2017-01-29 14:57:33 +01:00
mkfs_ext2.txt mkfs_ext2: use compatible inode sizes; add -I <inodesize>. (by Vladimir) 2009-10-22 12:12:17 +02:00
mkfs_minix.c *: add comment about APPLET_ODDNAME format 2017-01-29 14:57:33 +01:00
mkfs_reiser.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
mkfs_vfat.c *: add comment about APPLET_ODDNAME format 2017-01-29 14:57:33 +01:00
mkswap.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
more.c libbb: consolidate the code to set termios unbuffered mode 2017-01-11 16:17:59 +01:00
mount.c mount: create loop devices with LO_FLAGS_AUTOCLEAR flag 2017-03-16 16:55:47 +01:00
nsenter.c make --help texts more uniform 2017-01-21 02:49:58 +01:00
pivot_root.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
rdate.c rdate: time(NULL) is shorter than time(&var) 2017-01-20 16:07:14 +01:00
rdev.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
readprofile.c Code style fixes, no code changes 2016-11-28 01:22:57 +01:00
rev.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
rtcwake.c make --help texts more uniform 2017-01-21 02:49:58 +01:00
script.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
scriptreplay.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
setarch.c *: add comment about APPLET_ODDNAME format 2017-01-29 14:57:33 +01:00
swaponoff.c *: add comment about APPLET_ODDNAME format 2017-01-29 14:57:33 +01:00
switch_root.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
uevent.c Convert all util-linux/* applets to "new style" applet definitions 2016-11-23 11:46:32 +01:00
umount.c libbb: match_fstype() is unreadable in the extreme, fixing it 2017-01-30 00:45:05 +01:00
unshare.c make --help texts more uniform 2017-01-21 02:49:58 +01:00