[LEDE-DEV] [PATCH] mt7621: Add back CONFIG_SCHED_HRTICK to kernel config

[Mathias Kresin]

15.01.2018 21:09, Rosen Penev:
> Fixes FS #1242.
> 
> The way I figured this out was by using diff on config-4.4 from 17.01
> and config-4.9 from trunk. First I removed CONFIG options. That did not work.
> Then I started adding. This one seems to do the trick.
> 
> The issue is that anything in /dev/sdX starts returning bad data when read.
> PCIe or USB does not matter. I have not tested NVME since I lack the hardware.
> /dev/mtdblockX may or may not be impacted. No idea.
> 
> Signed-off-by: Rosen Penev <rosenp at gmail.com>
> ---
>   target/linux/ramips/mt7621/config-4.9 | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/target/linux/ramips/mt7621/config-4.9 b/target/linux/ramips/mt7621/config-4.9
> index f9765ed..0ea6798 100644
> --- a/target/linux/ramips/mt7621/config-4.9
> +++ b/target/linux/ramips/mt7621/config-4.9
> @@ -233,6 +233,7 @@ CONFIG_RTC_CLASS=y
>   CONFIG_RTC_DRV_PCF8563=y
>   CONFIG_RTC_I2C_AND_SPI=y
>   CONFIG_RTC_MC146818_LIB=y
> +CONFIG_SCHED_HRTICK=y
>   # CONFIG_SCHED_INFO is not set
>   CONFIG_SCHED_SMT=y
>   # CONFIG_SCSI_DMA is not set

What ever the root cause of your issue is, it isn't CONFIG_SCHED_HRTICK 
since it is already enabled for mt7621:

$ git grep CONFIG_SCHED_HRTICK
target/linux/gemini/config-4.4:# CONFIG_SCHED_HRTICK is not set
target/linux/generic/config-4.14:CONFIG_SCHED_HRTICK=y
target/linux/generic/config-4.4:CONFIG_SCHED_HRTICK=y
target/linux/generic/config-4.9:CONFIG_SCHED_HRTICK=y
target/linux/mcs814x/config-3.18:# CONFIG_SCHED_HRTICK is not set
target/linux/omap24xx/config-4.1:CONFIG_SCHED_HRTICK=y
target/linux/ppc40x/config-3.18:CONFIG_SCHED_HRTICK=y
target/linux/ppc44x/config-3.18:CONFIG_SCHED_HRTICK=y
target/linux/rb532/config-4.9:# CONFIG_SCHED_HRTICK is not set

For further patches, please explain in the commit message why the change 
fixes the issue and move the not commit message related text below the 
tear line.

Mathias