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Date: Mon, 20 Sep 2021 14:55:29 +0800 From: Yafang Shao <laoar.shao@...il.com> To: Stephen Rothwell <sfr@...b.auug.org.au> Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>, Peter Zijlstra <peterz@...radead.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Linux Next Mailing List <linux-next@...r.kernel.org> Subject: Re: linux-next: build warning after merge of the tip tree On Mon, Sep 20, 2021 at 9:33 AM Stephen Rothwell <sfr@...b.auug.org.au> wrote: > > Hi all, > > After merging the tip tree, today's linux-next build (powerpc_ppc64 > defconfig) produced this warning: > > kernel/sched/debug.c: In function 'print_cfs_group_stats': > kernel/sched/debug.c:460:41: warning: unused variable 'stats' [-Wunused-variable] > 460 | struct sched_statistics *stats = __schedstats_from_se(se); > | ^~~~~ > > Caused by commit > > cb3e971c435d ("sched: Make struct sched_statistics independent of fair sched class") > > # CONFIG_SCHEDSTATS is not set > Hi Stephen, Thanks for the report. We have discussed this issue before[1]. This warning happens when CONFIG_SCHEDSTATS is not set and schedstat_enabled() is 0, so the whole scope should be not compiled. It seems that we don't need to fix this warning. [1]. https://lore.kernel.org/lkml/20210911082505.115758-1-laoar.shao@gmail.com/ -- Thanks Yafang
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