Can you send me the configuration that created the warning ? It must have
been in a allnoconfig mode, since the default of the menuconfig BLK_DEV is
"y".

So looking at the x86_defconfig, while it doesn't have BLK_DEV enabled,
it also doesn't have it explicitly disabled .. and hence BLK_DEV should
have been on, and CONFIG_BLK_DEV_FD gone through to the final config.

The patch is fine, and it isn't a bad thing to have the dependency
explicitly in the fragment, I just want to understand the flow of
fragments and the kconfig mode at play.

Bruce

In message: [linux-yocto] [kernel-cache][yocto-5.15][PATCH] cfg: fix x86_64 
defconfig warnings
on 21/01/2022 Naveen Saini wrote:

> CONFIG_BLK_DEV_FD has dependeny on BLK_DEV, which is not enabled, as result
> throws warning.
>     [NOTE]: 'CONFIG_BLK_DEV_FD' last val (m) and .config val (n) do not match
> 
> Signed-off-by: Naveen Saini <[email protected]>
> ---
>  bsp/common-pc/common-pc-drivers.cfg | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/bsp/common-pc/common-pc-drivers.cfg 
> b/bsp/common-pc/common-pc-drivers.cfg
> index 7cb88817..e511c944 100644
> --- a/bsp/common-pc/common-pc-drivers.cfg
> +++ b/bsp/common-pc/common-pc-drivers.cfg
> @@ -55,6 +55,7 @@ CONFIG_I2C_I801=y
>  CONFIG_SATA_AHCI=y
>  
>  CONFIG_BLK_DEV_FD=m
> +CONFIG_BLK_DEV=y
>  
>  CONFIG_EEPROM_AT24=m
>  
> -- 
> 2.17.1
> 

> 
> 
> 

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