linux-kernel - Re: [PATCH sched_ext/for-6.11] sched_ext: Drop tools

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Date: Tue, 25 Jun 2024 11:17:28 +0100
From: Jon Hunter <jonathanh@...dia.com>
To: Tejun Heo <tj@...nel.org>
Cc: torvalds@...ux-foundation.org, mingo@...hat.com, peterz@...radead.org,
 juri.lelli@...hat.com, vincent.guittot@...aro.org, dietmar.eggemann@....com,
 rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
 bristot@...hat.com, vschneid@...hat.com, ast@...nel.org,
 daniel@...earbox.net, andrii@...nel.org, martin.lau@...nel.org,
 joshdon@...gle.com, brho@...gle.com, pjt@...gle.com, derkling@...gle.com,
 haoluo@...gle.com, dvernet@...a.com, dschatzberg@...a.com,
 dskarlat@...cmu.edu, riel@...riel.com, changwoo@...lia.com,
 himadrics@...ia.fr, memxor@...il.com, andrea.righi@...onical.com,
 joel@...lfernandes.org, linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
 kernel-team@...a.com,
 "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH sched_ext/for-6.11] sched_ext: Drop tools_clean target
 from the top-level Makefile


On 25/06/2024 02:58, Tejun Heo wrote:
> 2a52ca7c9896 ("sched_ext: Add scx_simple and scx_example_qmap example
> schedulers") added the tools_clean target which is triggered by mrproper.
> The tools_clean target triggers the sched_ext_clean target in tools/. This
> unfortunately makes mrproper fail when no BTF enabled kernel image is found:
> 
>    Makefile:83: *** Cannot find a vmlinux for VMLINUX_BTF at any of "  ../../vmlinux /sys/kernel/btf/vmlinux/boot/vmlinux-4.15.0-136-generic".  Stop.
>    Makefile:192: recipe for target 'sched_ext_clean' failed
>    make[2]: *** [sched_ext_clean] Error 2
>    Makefile:1361: recipe for target 'sched_ext' failed
>    make[1]: *** [sched_ext] Error 2
>    Makefile:240: recipe for target '__sub-make' failed
>    make: *** [__sub-make] Error 2
> 
> Clean targets shouldn't fail like this but also it's really odd for mrproper
> to single out and trigger the sched_ext_clean target when no other clean
> targets under tools/ are triggered.
> 
> Fix builds by dropping the tools_clean target from the top-level Makefile.
> The offending Makefile line is shared across BPF targets under tools/. Let's
> revisit them later.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Reported-by: Jon Hunter <jonathanh@...dia.com>
> Link: http://lkml.kernel.org/r/ac065f1f-8754-4626-95db-2c9fcf02567b@nvidia.com
> Fixes: 2a52ca7c9896 ("sched_ext: Add scx_simple and scx_example_qmap example schedulers")
> Cc: David Vernet <void@...ifault.com>
> ---
> Jon, this should fix it. I'll route this through sched_ext/for-6.11.
> 
> Thanks.
> 
>   Makefile |    8 +-------
>   1 file changed, 1 insertion(+), 7 deletions(-)
> 
> --- a/Makefile
> +++ b/Makefile
> @@ -1355,12 +1355,6 @@ ifneq ($(wildcard $(resolve_btfids_O)),)
>   	$(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
>   endif
>   
> -tools-clean-targets := sched_ext
> -PHONY += $(tools-clean-targets)
> -$(tools-clean-targets):
> -	$(Q)$(MAKE) -sC tools $@...ean
> -tools_clean: $(tools-clean-targets)
> -
>   # Clear a bunch of variables before executing the submake
>   ifeq ($(quiet),silent_)
>   tools_silent=s
> @@ -1533,7 +1527,7 @@ PHONY += $(mrproper-dirs) mrproper
>   $(mrproper-dirs):
>   	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
>   
> -mrproper: clean $(mrproper-dirs) tools_clean
> +mrproper: clean $(mrproper-dirs)
>   	$(call cmd,rmfiles)
>   	@find . $(RCS_FIND_IGNORE) \
>   		\( -name '*.rmeta' \) \

Fix it for me!

Tested-by: Jon Hunter <jonathanh@...dia.com>

Thanks!
Jon

-- 
nvpublic