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Date:   Tue, 22 Jan 2019 10:40:13 +0100
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Peng Hao <peng.hao2@zte.com.cn>
Cc:     arnd@arndb.de, andy.shevchenko@gmail.com,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/6]  misc/pvpanic : add pvpanic acpi driver
Message-ID: <20190122094013.GC29657@kroah.com>
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On Tue, Jan 22, 2019 at 03:25:09AM +0800, Peng Hao wrote:
> Add pvpanic acpi driver in pvpanic driver framework.
> 
> Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
> ---
>  drivers/misc/pvpanic/Kconfig        |  9 +++++
>  drivers/misc/pvpanic/Makefile       |  1 +
>  drivers/misc/pvpanic/pvpanic-acpi.c | 77 +++++++++++++++++++++++++++++++++++++
>  3 files changed, 87 insertions(+)
>  create mode 100644 drivers/misc/pvpanic/pvpanic-acpi.c
> 
> diff --git a/drivers/misc/pvpanic/Kconfig b/drivers/misc/pvpanic/Kconfig
> index 3e612c6..d274130 100644
> --- a/drivers/misc/pvpanic/Kconfig
> +++ b/drivers/misc/pvpanic/Kconfig
> @@ -5,3 +5,12 @@ config PVPANIC
>  	  This driver provides support for the pvpanic device.  pvpanic is
>  	  a paravirtualized device provided by QEMU; it lets a virtual machine
>  	  (guest) communicate panic events to the host.
> +
> +if PVPANIC
> +
> +config PVPANIC_ACPI
> +	tristate "pvpanic acpi driver"
> +	depends on ACPI
> +	default PVPANIC

No help text at all?  Not good.

> +
> +endif
> diff --git a/drivers/misc/pvpanic/Makefile b/drivers/misc/pvpanic/Makefile
> index 6394224..c5b73ca 100644
> --- a/drivers/misc/pvpanic/Makefile
> +++ b/drivers/misc/pvpanic/Makefile
> @@ -3,3 +3,4 @@
>  # Copyright (c) 2018 ZTE Ltd.
>  
>  obj-$(CONFIG_PVPANIC)            += pvpanic.o
> +obj-$(CONFIG_PVPANIC_ACPI)	 += pvpanic-acpi.o

Not aligned?

> diff --git a/drivers/misc/pvpanic/pvpanic-acpi.c b/drivers/misc/pvpanic/pvpanic-acpi.c
> new file mode 100644
> index 0000000..a6153fa
> --- /dev/null
> +++ b/drivers/misc/pvpanic/pvpanic-acpi.c
> @@ -0,0 +1,77 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later

Are you sure?

And also, shouldn't this be written as:
// SPDX-License-Identifier: GPL-2.0+

thanks,

greg k-h