From: Peter Zijlstra <peterz@infradead.org>
To: kernel test robot <lkp@intel.com>
Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org,
Ingo Molnar <mingo@kernel.org>,
Frederic Weisbecker <frederic@kernel.org>
Subject: Re: kernel/sched/core.c:5370:37: warning: cast between incompatible function types from 'long int (*)(void)' to 'int (*)(void)'
Date: Wed, 31 Mar 2021 09:32:21 +0200 [thread overview]
Message-ID: <YGQlhQ9rfkKBwUKB@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <202103311434.dpBaRaX7-lkp@intel.com>
On Wed, Mar 31, 2021 at 02:15:41PM +0800, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 5e46d1b78a03d52306f21f77a4e4a144b6d31486
> commit: 826bfeb37bb4302ee6042f330c4c0c757152bdb8 preempt/dynamic: Support dynamic preempt with preempt= boot option
> date: 6 weeks ago
> config: x86_64-randconfig-r011-20210331 (attached as .config)
> compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> reproduce (this is a W=1 build):
> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=826bfeb37bb4302ee6042f330c4c0c757152bdb8
> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git fetch --no-tags linus master
> git checkout 826bfeb37bb4302ee6042f330c4c0c757152bdb8
> # save the attached .config to linux build tree
> make W=1 ARCH=x86_64
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All warnings (new ones prefixed by >>):
>
> kernel/sched/core.c: In function 'schedule_tail':
> kernel/sched/core.c:4252:13: warning: variable 'rq' set but not used [-Wunused-but-set-variable]
> 4252 | struct rq *rq;
> | ^~
> In file included from include/linux/err.h:5,
> from include/linux/kthread.h:5,
> from include/trace/events/sched.h:8,
> from kernel/sched/core.c:10:
> kernel/sched/core.c: In function 'setup_preempt_mode':
> >> kernel/sched/core.c:5370:37: warning: cast between incompatible function types from 'long int (*)(void)' to 'int (*)(void)' [-Wcast-function-type]
That warning is broken IMO.
Still, I have a patch for this somewhere.. I'll try and push it out
sometime soon.
prev parent reply other threads:[~2021-03-31 7:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-31 6:15 kernel/sched/core.c:5370:37: warning: cast between incompatible function types from 'long int (*)(void)' to 'int (*)(void)' kernel test robot
2021-03-31 7:32 ` Peter Zijlstra [this message]
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