860051f1d1
Starting in Linux 5.10, trying to write to /dev/{null,zero} errors out.
Prefer to inform people when this happens rather than hoping they guess
what's wrong.
Reviewed-by: Antonio Russo <aerusso@aerusso.net>
Reviewed-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes: #11991
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| .. | ||
| .gitignore | ||
| Makefile.am | ||
| zfs_iter.c | ||
| zfs_iter.h | ||
| zfs_main.c | ||
| zfs_project.c | ||
| zfs_projectutil.h | ||
| zfs_util.h | ||