On Mon, Jun 04, 2018 at 03:16:12PM +0200, Ard Biesheuvel wrote:

From: Aleksey Makarov <redacted>

Commit 10879ae5f12e9cab3c4e8e9504c1aaa8a033bde7 upstream.

This patch adds function pl011_console_match() that implements
method match of struct console.  It allows to match consoles against
data specified in a string, for example taken from command line or
compiled by ACPI SPCR table handler.

This patch was merged to tty-next but then reverted because of
conflict with

commit 46e36683f433 ("serial: earlycon: Extend earlycon command line option to support 64-bit addresses")

Now it is fixed.

Signed-off-by: Aleksey Makarov <redacted>
Reviewed-by: Peter Hurley <redacted>
Acked-by: Russell King <redacted>
Tested-by: Christopher Covington <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ard Biesheuvel <redacted>
---

Please consider for v4.9-stable. It is the missing puzzle piece for SPCR
support on arm64 ACPI systems, which got merged for v4.9 [0]. Now that more
systems are becoming available to people working in the kernel community, it
turns out that v4.9 distro installers (e.g., Debian Stretch) won't work
unless you pass a 'console=' parameter explicitly, which is annoying.
Given that it was clearly the intent to include this code at the time,
I hope it will be considered for backporting.

[0] To quote the tty maintainer:

      Also in here is the long-suffering ACPI SPCR patchset, which was
      passed around from maintainer to maintainer like a hot-potato. Seems I
      was the sucker^Wlucky one. All of those patches have been acked by the
      various subsystem maintainers as well.

Now queued up, thanks.

greg k-h