Re: [CI-NOTIFY]: TCWG Bisect tcwg_kernel/llvm-master-aarch64-mainline-allmodconfig - Build # 10 - Successful!

Successfully identified regression in *linux* in CI configuration tcwg_kernel/llvm-master-aarch64-mainline-allmodconfig.  So far, this commit has regressed CI configurations:
 - tcwg_kernel/llvm-master-aarch64-mainline-allmodconfig

Culprit:
<cut>
commit c3496da580b0fc10fdeba8f6a5e6aef4c78b5598
Author: Slark Xiao [off-list ref]
Date:   Tue Aug 31 10:40:25 2021 +0800

    net: Add depends on OF_NET for LiteX's LiteETH

    Current settings may produce a build error when
    CONFIG_OF_NET is disabled. The CONFIG_OF_NET controls
    a headfile <linux/of.h> and some functions
     in <linux/of_net.h>.

    Signed-off-by: Slark Xiao [off-list ref]
    Signed-off-by: Jakub Kicinski [off-list ref]
</cut>

Results regressed to (for first_bad == c3496da580b0fc10fdeba8f6a5e6aef4c78b5598)
# reset_artifacts:
-10
# build_abe binutils:
-9
# build_llvm:
-5
# build_abe qemu:
-2
# linux_n_obj:
29873
# linux build successful:
all
# First few build errors in logs:

from (for last_good == a9e7c3cedc2914f63cd135b75832b9bf850af782)
# reset_artifacts:
-10
# build_abe binutils:
-9
# build_llvm:
-5
# build_abe qemu:
-2
# linux_n_obj:
29873
# linux build successful:
all
# linux boot successful:
boot

Artifacts of last_good build: https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-master-aarch64-mainline-allmodconfig/10/artifact/artifacts/build-a9e7c3cedc2914f63cd135b75832b9bf850af782/
Artifacts of first_bad build: https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-master-aarch64-mainline-allmodconfig/10/artifact/artifacts/build-c3496da580b0fc10fdeba8f6a5e6aef4c78b5598/
Build top page/logs: https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-master-aarch64-mainline-allmodconfig/10/

Configuration details:


Reproduce builds:
<cut>
mkdir investigate-linux-c3496da580b0fc10fdeba8f6a5e6aef4c78b5598
cd investigate-linux-c3496da580b0fc10fdeba8f6a5e6aef4c78b5598

git clone https://git.linaro.org/toolchain/jenkins-scripts

mkdir -p artifacts/manifests
curl -o artifacts/manifests/build-baseline.sh https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-master-aarch64-mainline-allmodconfig/10/artifact/artifacts/manifests/build-baseline.sh --fail
curl -o artifacts/manifests/build-parameters.sh https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-master-aarch64-mainline-allmodconfig/10/artifact/artifacts/manifests/build-parameters.sh --fail
curl -o artifacts/test.sh https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-master-aarch64-mainline-allmodconfig/10/artifact/artifacts/test.sh --fail
chmod +x artifacts/test.sh

# Reproduce the baseline build (build all pre-requisites)
./jenkins-scripts/tcwg_kernel-build.sh @@ artifacts/manifests/build-baseline.sh

# Save baseline build state (which is then restored in artifacts/test.sh)
mkdir -p ./bisect
rsync -a --del --delete-excluded --exclude /bisect/ --exclude /artifacts/ --exclude /linux/ ./ ./bisect/baseline/

cd linux

# Reproduce first_bad build
git checkout --detach c3496da580b0fc10fdeba8f6a5e6aef4c78b5598
../artifacts/test.sh

# Reproduce last_good build
git checkout --detach a9e7c3cedc2914f63cd135b75832b9bf850af782
../artifacts/test.sh

cd ..
</cut>

History of pending regressions and results: https://git.linaro.org/toolchain/ci/base-artifacts.git/log/?h=linaro-local/ci/tcwg_kernel/llvm-master-aarch64-mainline-allmodconfig

Artifacts: https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-master-aarch64-mainline-allmodconfig/10/artifact/artifacts/
Build log: https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-master-aarch64-mainline-allmodconfig/10/consoleText

Full commit (up to 1000 lines):
<cut>
commit c3496da580b0fc10fdeba8f6a5e6aef4c78b5598
Author: Slark Xiao [off-list ref]
Date:   Tue Aug 31 10:40:25 2021 +0800

    net: Add depends on OF_NET for LiteX's LiteETH

    Current settings may produce a build error when
    CONFIG_OF_NET is disabled. The CONFIG_OF_NET controls
    a headfile <linux/of.h> and some functions
     in <linux/of_net.h>.

    Signed-off-by: Slark Xiao [off-list ref]
    Signed-off-by: Jakub Kicinski [off-list ref]
---
 drivers/net/ethernet/litex/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/litex/Kconfig b/drivers/net/ethernet/litex/Kconfig
index 265dba414b41..63bf01d28f0c 100644
--- a/drivers/net/ethernet/litex/Kconfig
+++ b/drivers/net/ethernet/litex/Kconfig

@@ -17,6 +17,7 @@ if NET_VENDOR_LITEX

 config LITEX_LITEETH
        tristate "LiteX Ethernet support"
+       depends on OF_NET
        help
          If you wish to compile a kernel for hardware with a LiteX LiteEth
          device then you should answer Y to this.

</cut>

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