Re: [GIT PULL] ftrace: Updates for 6.15

[Christian Loehle]

________________________________________
From: pr-tracker-bot@xxxxxxxxxx <pr-tracker-bot@xxxxxxxxxx>
Sent: 28 March 2025 00:09
To: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>; LKML <linux-kernel@xxxxxxxxxxxxxxx>; Masami Hiramatsu <mhiramat@xxxxxxxxxx>; Mark Rutland <Mark.Rutland@xxxxxxx>; Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>; Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>; Haiyue Wang <haiyuewa@xxxxxxx>; Jiapeng Chong <jiapeng.chong@xxxxxxxxxxxxxxxxx>; Sasha Levin <sashal@xxxxxxxxxx>; Sven Schnelle <svens@xxxxxxxxxxxxx>; Tengda Wu <wutengda@xxxxxxxxxxxxxxx>
Subject: Re: [GIT PULL] ftrace: Updates for 6.15
 
 
>The pull request you sent on Tue, 25 Mar 2025 19:39:35 -0400:
>
>> git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git ftrace-v6.15
>
>has been merged into torvalds/linux.git:
>https://git.kernel.org/torvalds/c/31eb415bf6f06c90fdd9b635caf3a6c5110a38b6
>
>Thank you!
>
>--
>Deet-doot-dot, I am a bot.
>https://korg.docs.kernel.org/prtracker.html

Hi Steven,
I'm pretty sure this causes the build to fail on linus' tree and next:
4e82c87058f4 (HEAD -> master, origin/master, origin/HEAD) Merge tag 'rust-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux

aarch64-linux-gnu-ld: Unexpected GOT/PLT entries detected!
aarch64-linux-gnu-ld: Unexpected run-time procedure linkages detected!
aarch64-linux-gnu-ld: kernel/trace/trace_output.o: in function `print_function_args':
/home/chrloe01/development/linux-mainline/kernel/trace/trace_output.c:712: undefined reference to `btf_find_func_proto'
aarch64-linux-gnu-ld: /home/chrloe01/development/linux-mainline/kernel/trace/trace_output.c:716: undefined reference to `btf_get_func_param'
make[2]: *** [scripts/Makefile.vmlinux:77: vmlinux] Error 1
make[1]: *** [/data_nvme1n1/chrloe01/development/linux-mainline/Makefile:1234: vmlinux] Error 2
make: *** [Makefile:251: __sub-make] Error 2

Sound familiar?
grep BTF .config
CONFIG_DEBUG_INFO_BTF=y
CONFIG_PAHOLE_HAS_SPLIT_BTF=y
CONFIG_DEBUG_INFO_BTF_MODULES=y
# CONFIG_MODULE_ALLOW_BTF_MISMATCH is not set

Enabling CONFIG_PROBE_EVENTS_BTF_ARGS passes the build.