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Message-ID: <202211291517.dEVaddMM-lkp@intel.com>
Date: Tue, 29 Nov 2022 15:39:10 +0800
From: kernel test robot <lkp@...el.com>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
Will Deacon <will@...nel.org>, Jan Kara <jack@...e.cz>
Cc: oe-kbuild-all@...ts.linux.dev, Waiman Long <longman@...hat.com>,
LKML <linux-kernel@...r.kernel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Steven Rostedt <rostedt@...dmis.org>,
Mel Gorman <mgorman@...e.de>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Catalin Marinas <catalin.marinas@....com>
Subject: Re: Re: Crash with PREEMPT_RT on aarch64 machine
Hi Sebastian,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on tip/locking/core]
[also build test WARNING on linus/master v6.1-rc7 next-20221129]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Sebastian-Andrzej-Siewior/Re-Crash-with-PREEMPT_RT-on-aarch64-machine/20221129-000000
patch link: https://lore.kernel.org/r/Y4Tapja2qq8HiHBZ%40linutronix.de
patch subject: Re: Crash with PREEMPT_RT on aarch64 machine
config: ia64-randconfig-s053-20221129
compiler: ia64-linux-gcc (GCC) 12.1.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-39-gce1a6720-dirty
# https://github.com/intel-lab-lkp/linux/commit/d4aea399f0b5472dc15a4c623d99b4ae79005050
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Sebastian-Andrzej-Siewior/Re-Crash-with-PREEMPT_RT-on-aarch64-machine/20221129-000000
git checkout d4aea399f0b5472dc15a4c623d99b4ae79005050
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=ia64 SHELL=/bin/bash kernel/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
sparse warnings: (new ones prefixed by >>)
kernel/locking/rtmutex_api.c: note: in included file (through include/linux/irqflags.h, include/linux/spinlock.h):
arch/ia64/include/asm/irqflags.h:64:9: sparse: sparse: context imbalance in 'rt_mutex_adjust_prio_chain' - different lock contexts for basic block
arch/ia64/include/asm/irqflags.h:64:9: sparse: sparse: context imbalance in 'rt_mutex_slowlock_block' - unexpected unlock
kernel/locking/rtmutex_api.c: note: in included file:
>> kernel/locking/rtmutex.c:117:9: sparse: sparse: incorrect type in assignment (different base types) @@ expected struct task_struct *volatile @@ got unsigned long [assigned] val @@
kernel/locking/rtmutex.c:117:9: sparse: expected struct task_struct *volatile
kernel/locking/rtmutex.c:117:9: sparse: got unsigned long [assigned] val
>> kernel/locking/rtmutex.c:117:9: sparse: sparse: incorrect type in assignment (different base types) @@ expected struct task_struct *volatile @@ got unsigned long [assigned] val @@
kernel/locking/rtmutex.c:117:9: sparse: expected struct task_struct *volatile
kernel/locking/rtmutex.c:117:9: sparse: got unsigned long [assigned] val
vim +117 kernel/locking/rtmutex.c
108
109 static __always_inline void
110 rt_mutex_set_owner_pi(struct rt_mutex_base *lock, struct task_struct *owner)
111 {
112 unsigned long val = (unsigned long)owner;
113
114 if (rt_mutex_has_waiters(lock))
115 val |= RT_MUTEX_HAS_WAITERS;
116
> 117 WRITE_ONCE(lock->owner, val);
118 }
119
--
0-DAY CI Kernel Test Service
https://01.org/lkp
View attachment "config" of type "text/plain" (125024 bytes)
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