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From ad1c931f24e81b169127d611eb8aac72665c4bf2 Mon Sep 17 00:00:00 2001
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From: Karel Zak <kzak@redhat.com>
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Date: Tue, 30 Aug 2016 10:25:44 +0200
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Subject: [PATCH 096/116] umount: fix obsolete info about loop= in umount.8
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Upstream: Upstream: Upstream: https://github.com/karelzak/util-linux/commit/d00eb87ba284635e72b10880dfcf409276fa41b0
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Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1370959
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Signed-off-by: Karel Zak <kzak@redhat.com>
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---
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sys-utils/umount.8 | 20 ++++++++++++--------
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1 file changed, 12 insertions(+), 8 deletions(-)
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diff --git a/sys-utils/umount.8 b/sys-utils/umount.8
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index 1fa653c..f0a712b 100644
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--- a/sys-utils/umount.8
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+++ b/sys-utils/umount.8
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@@ -78,8 +78,10 @@ Do not canonicalize paths. For more details about this option see the
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man page.
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.TP
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\fB\-d\fR, \fB\-\-detach\-loop\fR
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-In case the unmounted device was a loop device, also free this loop
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-device.
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+When the unmounted device was a loop device, also free this loop
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+device. This option is unnecessary for devices initialized by
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+.BR mount (8),
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+in this case "autoclear" functionality is enabled by default.
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.TP
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\fB\-\-fake\fP
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Causes everything to be done except for the actual system call; this 'fakes'
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@@ -145,12 +147,14 @@ Print version and exit.
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.SH "THE LOOP DEVICE"
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The
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.B umount
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-command will free the loop device (if any) associated with the mount, in
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-case it finds the option 'loop=...' in
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-.IR /etc/mtab ,
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-or when the \-d option was given. Any pending loop devices can be freed
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-using 'losetup -d', see
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-.BR losetup (8).
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+command will automatically detach loop device previously initialized by
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+.BR mount (8)
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+command independently of /etc/mtab.
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+
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+In this case the device is initialized with "autoclear" flag (see
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+.BR losetup (8)
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+output for more details), otherwise it's necessary to use the option \fB \-\-detach\-loop\fR
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+or call \fBlosetup -d <device>\fR. The autoclear feature is supported since Linux 2.6.25.
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.SH NOTES
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The syntax of external umount helpers is:
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.PP
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--
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2.9.3
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