Paul Gortmaker 61fb0a5dc0 systemd: dont spew hidepid mount errors for kernels < v5.8
Recent systemd started using ascii args to "hidepid=" mount options
for proc fs - unconditionally -- even though kernels older than v5.8
emit an error message on each attempt:

root@qemux86-64:~# cat /proc/version
Linux version 5.4.87-yocto-standard (oe-user@oe-host) (gcc version 10.2.0 (GCC)) #1 SMP PREEMPT Fri Jan 8 01:47:13 UTC 2021
root@qemux86-64:~# dmesg|grep proc:
[   29.487995] proc: Bad value for 'hidepid'
[   43.170571] proc: Bad value for 'hidepid'
[   44.175615] proc: Bad value for 'hidepid'
[   46.213300] proc: Bad value for 'hidepid'
root@qemux86-64:~#

Simply ignoring them as the systemd maintainer unconditionally says
is the resolution is clearly not acceptable, given the above.

Add a kernel version check to avoid calling mount with invalid args.
Further details are within the enclosed systemd commit.

Cc: Luca Boccassi <luca.boccassi@microsoft.com>
Cc: Richard Purdie <richard.purdie@linuxfoundation.org>
(From OE-Core rev: 76107fd7372559aa4cd22a89d5517a4dfce9314d)

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2021-01-16 22:39:35 +00:00

QEMU Emulation Targets
======================

To simplify development, the build system supports building images to
work with the QEMU emulator in system emulation mode. Several architectures
are currently supported in 32 and 64 bit variants:

  * ARM (qemuarm + qemuarm64)
  * x86 (qemux86 + qemux86-64)
  * PowerPC (qemuppc only)
  * MIPS (qemumips + qemumips64)

Use of the QEMU images is covered in the Yocto Project Reference Manual.
The appropriate MACHINE variable value corresponding to the target is given
in brackets.
Description
No description provided
Readme 251 MiB