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umount: remove sync(2) call when used with -f

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It completely unnecessarily iterates over all filesystems and happens
to be executed a lot e.g. by synth.

Reviewed by:	kib
Approved by:	re (gjb)
Differential Revision:	https://reviews.freebsd.org/D17143
This commit is contained in:
Mateusz Guzik 2018-09-13 13:57:42 +00:00
parent aad4d67d9c
commit 9696ba7fc0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=338639
1 changed files with 0 additions and 4 deletions
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sbin/umount/umount.c
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@ -136,10 +136,6 @@ main(int argc, char *argv[])
if ((fflag & MNT_FORCE) != 0 && (fflag & MNT_NONBUSY) != 0)
err(1, "-f and -n are mutually exclusive");
/* Start disks transferring immediately. */
if ((fflag & (MNT_FORCE | MNT_NONBUSY)) == 0 && nfsforce == 0)
sync();
if ((argc == 0 && !all) || (argc != 0 && all))
usage();