linux-kernel - Re: [PATCHv2] scsi: ufs: Kconfig: SCSI_UFS

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Date:   Sat, 6 Nov 2021 17:51:23 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Anders Roxell <anders.roxell@...aro.org>
Cc:     "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>, avri.altman@....com,
        scsi <linux-scsi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-hwmon@...r.kernel.org, Randy Dunlap <rdunlap@...radead.org>
Subject: Re: [PATCHv2] scsi: ufs: Kconfig: SCSI_UFS_HWMON depens on HWMON=y

Hi Anders,

On Mon, Sep 27, 2021 at 10:47 AM Anders Roxell <anders.roxell@...aro.org> wrote:
> When building an allmodconfig kernel, the following build error shows
> up:
>
> aarch64-linux-gnu-ld: drivers/scsi/ufs/ufs-hwmon.o: in function `ufs_hwmon_probe':
> /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:177: undefined reference to `hwmon_device_register_with_info'
> /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:177:(.text+0x510): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `hwmon_device_register_with_info'
> aarch64-linux-gnu-ld: drivers/scsi/ufs/ufs-hwmon.o: in function `ufs_hwmon_remove':
> /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:195: undefined reference to `hwmon_device_unregister'
> /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:195:(.text+0x5c8): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `hwmon_device_unregister'
> aarch64-linux-gnu-ld: drivers/scsi/ufs/ufs-hwmon.o: in function `ufs_hwmon_notify_event':
> /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:206: undefined reference to `hwmon_notify_event'
> /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:206:(.text+0x64c): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `hwmon_notify_event'
> aarch64-linux-gnu-ld: /home/anders/src/kernel/next/drivers/scsi/ufs/ufs-hwmon.c:209: undefined reference to `hwmon_notify_event'
> /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:209:(.text+0x66c): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `hwmon_notify_event'
>
> Since fragment 'SCSI_UFS_HWMON' can't be build as a module,
> 'SCSI_UFS_HWMON' has to depend on 'HWMON=y'.
>
> Fixes: e88e2d32200a ("scsi: ufs: core: Probe for temperature notification support")
> Also-Reported-by: Randy Dunlap <rdunlap@...radead.org>
> Signed-off-by: Anders Roxell <anders.roxell@...aro.org>
> Acked-by: Randy Dunlap <rdunlap@...radead.org> # build-tested
> Acked-by: Avri Altman <avri.altman@....com>
> ---
>  drivers/scsi/ufs/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig
> index 565e8aa6319d..2ca69f87e4de 100644
> --- a/drivers/scsi/ufs/Kconfig
> +++ b/drivers/scsi/ufs/Kconfig
> @@ -202,7 +202,7 @@ config SCSI_UFS_FAULT_INJECTION
>
>  config SCSI_UFS_HWMON
>         bool "UFS  Temperature Notification"
> -       depends on SCSI_UFSHCD && HWMON
> +       depends on SCSI_UFSHCD=HWMON || HWMON=y

Which is also true if both SCSI_UFSHCD and HWMON are disabled,
thus exposing this question to everyone?

Fix sent
"[PATCH] scsi: ufs: Wrap Universal Flash Storage drivers in SCSI_UFSHCD"
https://lore.kernel.org/all/20211106164650.1571068-1-geert@linux-m68k.org/

>         help
>           This provides support for UFS hardware monitoring. If enabled,
>           a hardware monitoring device will be created for the UFS device.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds