[Bug]: does not compile with 6.11-rc6 (kernel_ethtool_ts_info issue)

[JonKohler]

Preliminary Actions

• I have searched the existing issues and didn't find a duplicate.
• I have followed the AWS official troubleshoot documentation.
• I have followed the driver readme and best practices.

Driver Type

Linux kernel driver for Elastic Network Adapter (ENA)

Driver Tag/Commit

ena_linux_2.12.3

Custom Code

No

OS Platform and Distribution

Linux 6.11-rc6 (431c1646e1f8) - https://github.com/torvalds/linux/tree/v6.11-rc6

Bug description

ENA out of tree driver 2.12.3 does not compile with latest mainline, 6.11-rc6

Note: This is slightly different than #313 (which I also hit).

This breakage appears to be from torvalds/linux@2111375 and series https://lore.kernel.org/all/[email protected]/

Reproduction steps

1. Pull latest rc tag from Linux tree (https://github.com/torvalds/linux/tree/v6.11-rc6)
2. Try to compile with 2.12.3
3. Watch it go kaboom with wanton abandon

Expected Behavior

It compiles

Actual Behavior

It does not compile

Additional Data

Using mockbuild environment with el8 based userspace, and distro compiler (GCC 8.5 distro managed)

Relevant log output

[ena] + cd amzn-drivers-ena_linux_2.12.3
[ena] + ./kernel/linux/ena/configure.sh --kernel-dir /usr/src/kernels/6.11.0-11.0s999c999.dirtyr5.el8.x86_64
[ena] Trying to intercept CC arguments
[ena] Detected compiler:  gcc
[ena] Managed to intercept CC arguments
[ena] ### Detection of the available kernel API ###
[ena] ### Detection completed ###
[ena] ++ pwd
[ena] + make -j96 -C /usr/src/kernels/6.11.0-11.0s999c999.dirtyr5.el8.x86_64 M=/builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena CONFIG_ENA=m modules
[ena] make: Entering directory '/usr/src/kernels/6.11.0-11.0s999c999.dirtyr5.el8.x86_64'
[ena]   CC [M]  /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/ena_netdev.o
[ena]   CC [M]  /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/ena_ethtool.o
[ena]   CC [M]  /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/ena_lpc.o
[ena]   CC [M]  /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/ena_phc.o
[ena]   CC [M]  /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/ena_xdp.o
[ena]   CC [M]  /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/dim.o
[ena]   CC [M]  /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/net_dim.o
[ena]   CC [M]  /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/../common/ena_com//ena_com.o
[ena]   CC [M]  /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/../common/ena_com//ena_eth_com.o
[ena]   CC [M]  /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/ena_sysfs.o
[ena] /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/ena_ethtool.c:1439:18: error: initialization of 'int (*)(struct net_device *, struct kernel_ethtool_ts_info *)' from incompatible pointer type 'int (*)(struct net_device *, struct ethtool_ts_info *)' [-Werror=incompatible-pointer-types]
[ena]   .get_ts_info  = ena_get_ts_info,
[ena]                   ^~~~~~~~~~~~~~~
[ena] compilation terminated due to -Wfatal-errors.
[ena] cc1: all warnings being treated as errors
[ena] make[2]: *** [scripts/Makefile.build:244: /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/ena_ethtool.o] Error 1
[ena] make[2]: *** Waiting for unfinished jobs....
[ena] /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/ena_xdp.c: In function 'ena_xdp_rx_skb_zc':
[ena] /builddir/build/BUILD/amzn-drivers-ena_linux_2.12.3/kernel/linux/ena/ena_xdp.c:749:8: error: implicit declaration of function '__napi_alloc_skb'; did you mean 'napi_alloc_skb'? [-Werror=implicit-function-declaration]
[ena]   skb = __napi_alloc_skb(rx_ring->napi,
[ena]         ^~~~~~~~~~~~~~~~
[ena]         napi_alloc_skb
[ena] compilation terminated due to -Wfatal-errors.
[ena] cc1: all warnings being treated as errors

Contact Details

[email protected]

[davidarinzon]

Hi @JonKohler

Thanks for reporting the issue.
We are aware of this failure and it will be fixed in one of the upcoming releases.
Let us know if you would like to have a temporary patch for this in the meanwhile.

[JonKohler]

Thanks! @davidarinzon I wouldn't turn down a temp patch just to unblock a larger qual effort, to get some early smoke testing done on mainline for the larger platform this particular kernel will service.

[JonKohler]

This was fixed in 2.13.0 with commit ecc9458, and I was able to successfully compile against 6.11.0-rc6