Re: [CI-NOTIFY]: TCWG Bisect tcwg_kernel/llvm-release-arm-stable-allyesconfig - Build # 4 - Successful!

[Nathan Chancellor <nathan@kernel.org>]

On 8/2/2021 7:43 AM, ci_notify@linaro.org wrote:
> Successfully identified regression in *linux* in CI configuration tcwg_kernel/llvm-release-arm-stable-allyesconfig.  So far, this commit has regressed CI configurations:
>   - tcwg_kernel/llvm-release-arm-stable-allyesconfig
> 
> Culprit:
> <cut>
> commit 341db343768bc44f3512facc464021730d64071c
> Author: Linus Walleij <linus.walleij@linaro.org>
> Date:   Sun May 23 00:50:39 2021 +0200
> 
>      power: supply: ab8500: Move to componentized binding
>      
>      [ Upstream commit 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb ]
>      
>      The driver has problems with the different components of
>      the charging code racing with each other to probe().
>      
>      This results in all four subdrivers populating battery
>      information to ascertain that it is populated for their
>      own needs for example.
>      
>      Fix this by using component probing and thus expressing
>      to the kernel that these are dependent components.
>      The probes can happen in any order and will only acquire
>      resources such as state container, regulators and
>      interrupts and initialize the data structures, but no
>      execution happens until the .bind() callback is called.
>      
>      The charging driver is the main component and binds
>      first, then bind in order the three subcomponents:
>      ab8500-fg, ab8500-btemp and ab8500-chargalg.
>      
>      Do some housekeeping while we are moving the code around.
>      Like use devm_* for IRQs so as to cut down on some
>      boilerplate.
>      
>      Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
>      Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
>      Signed-off-by: Sasha Levin <sashal@kernel.org>
> </cut>
> 
> Results regressed to (for first_bad == 341db343768bc44f3512facc464021730d64071c)
> # reset_artifacts:
> -10
> # build_abe binutils:
> -9
> # build_llvm:
> -5
> # build_abe qemu:
> -2
> # linux_n_obj:
> 19634
> # First few build errors in logs:
> # 00:03:07 drivers/power/supply/ab8500_fg.c:3061:32: error: use of undeclared identifier 'np'
> # 00:03:08 make[3]: *** [drivers/power/supply/ab8500_fg.o] Error 1
> # 00:03:10 make[2]: *** [drivers/power/supply] Error 2
> # 00:03:10 make[1]: *** [drivers/power] Error 2
> # 00:04:05 make: *** [drivers] Error 2

Greg and Sasha,

Please cherry pick upstream commit 7e2bb83c617f ("power: supply: ab8500: 
Call battery population once") to resolve this build error on 5.13.

Cheers,
Nathan