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Date:   Sun, 8 Oct 2023 08:43:17 +0800
From:   kernel test robot <lkp@intel.com>
To:     Uros Bizjak <ubizjak@gmail.com>
Cc:     oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org,
        x86@kernel.org, Ingo Molnar <mingo@kernel.org>,
        Nadav Amit <namit@vmware.com>
Subject: [tip:x86/percpu 12/12] arch/x86/include/asm/preempt.h:27:55: sparse:
 sparse: incompatible types for operation (&):
Message-ID: <202310080853.UhMe5iWa-lkp@intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Precedence: bulk

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/percpu
head:   ca4256348660cb2162668ec3d13d1f921d05374a
commit: ca4256348660cb2162668ec3d13d1f921d05374a [12/12] x86/percpu: Use C for percpu read/write accessors
config: x86_64-randconfig-122-20231007 (https://download.01.org/0day-ci/archive/20231008/202310080853.UhMe5iWa-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231008/202310080853.UhMe5iWa-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202310080853.UhMe5iWa-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   kernel/bpf/percpu_freelist.c: note: in included file (through arch/x86/include/asm/preempt.h, include/linux/preempt.h, include/linux/spinlock.h, ...):
   arch/x86/include/asm/percpu.h:550:49: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/percpu.h:550:49: sparse: sparse: got __seg_gs
   arch/x86/include/asm/percpu.h:564:33: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/percpu.h:564:33: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c: note: in included file (through arch/x86/include/asm/cpufeature.h, arch/x86/include/asm/thread_info.h, include/linux/thread_info.h, ...):
   arch/x86/include/asm/processor.h:504:9: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/processor.h:504:9: sparse: sparse: got __seg_gs
   arch/x86/include/asm/processor.h:504:9: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/processor.h:504:9: sparse: sparse: got __seg_gs
   arch/x86/include/asm/processor.h:504:9: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/processor.h:504:9: sparse: sparse: got __seg_gs
   arch/x86/include/asm/processor.h:504:9: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/processor.h:504:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c: note: in included file (through include/linux/preempt.h, include/linux/spinlock.h, kernel/bpf/percpu_freelist.h):
   arch/x86/include/asm/preempt.h:27:16: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:27:16: sparse: sparse: got __seg_gs
   arch/x86/include/asm/preempt.h:34:15: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:34:15: sparse: sparse: got __seg_gs
   arch/x86/include/asm/preempt.h:38:19: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:38:19: sparse: sparse: got __seg_gs
   arch/x86/include/asm/preempt.h:61:9: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:61:9: sparse: sparse: got __seg_gs
   arch/x86/include/asm/preempt.h:66:9: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:66:9: sparse: sparse: got __seg_gs
   arch/x86/include/asm/preempt.h:71:18: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:71:18: sparse: sparse: got __seg_gs
   arch/x86/include/asm/preempt.h:80:9: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:80:9: sparse: sparse: got __seg_gs
   arch/x86/include/asm/preempt.h:80:9: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:80:9: sparse: sparse: got __seg_gs
   arch/x86/include/asm/preempt.h:80:9: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:80:9: sparse: sparse: got __seg_gs
   arch/x86/include/asm/preempt.h:85:9: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:85:9: sparse: sparse: got __seg_gs
   arch/x86/include/asm/preempt.h:85:9: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:85:9: sparse: sparse: got __seg_gs
   arch/x86/include/asm/preempt.h:85:9: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:85:9: sparse: sparse: got __seg_gs
   arch/x86/include/asm/preempt.h:95:16: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:95:16: sparse: sparse: got __seg_gs
   arch/x86/include/asm/preempt.h:104:16: sparse: sparse: Expected ) at end of cast operator
   arch/x86/include/asm/preempt.h:104:16: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:61:20: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:61:20: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:61:20: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:61:20: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:61:20: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:61:20: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:61:20: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:61:20: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:86:39: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:86:39: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:127:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: got __seg_gs
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: Expected ) at end of cast operator
   kernel/bpf/percpu_freelist.c:159:9: sparse: sparse: got __seg_gs
>> arch/x86/include/asm/preempt.h:27:55: sparse: sparse: incompatible types for operation (&):
>> arch/x86/include/asm/preempt.h:27:55: sparse:    void
>> arch/x86/include/asm/preempt.h:27:55: sparse:    unsigned int
>> arch/x86/include/asm/preempt.h:27:55: sparse: sparse: incompatible types for operation (&):
>> arch/x86/include/asm/preempt.h:27:55: sparse:    void
>> arch/x86/include/asm/preempt.h:27:55: sparse:    unsigned int

vim +27 arch/x86/include/asm/preempt.h

ba1f14fbe70965 Peter Zijlstra  2013-11-28  20  
c2daa3bed53a81 Peter Zijlstra  2013-08-14  21  /*
c2daa3bed53a81 Peter Zijlstra  2013-08-14  22   * We mask the PREEMPT_NEED_RESCHED bit so as not to confuse all current users
c2daa3bed53a81 Peter Zijlstra  2013-08-14  23   * that think a non-zero value indicates we cannot preempt.
c2daa3bed53a81 Peter Zijlstra  2013-08-14  24   */
c2daa3bed53a81 Peter Zijlstra  2013-08-14  25  static __always_inline int preempt_count(void)
c2daa3bed53a81 Peter Zijlstra  2013-08-14  26  {
64701838bf0575 Thomas Gleixner 2022-09-15 @27  	return raw_cpu_read_4(pcpu_hot.preempt_count) & ~PREEMPT_NEED_RESCHED;
c2daa3bed53a81 Peter Zijlstra  2013-08-14  28  }
c2daa3bed53a81 Peter Zijlstra  2013-08-14  29  

:::::: The code at line 27 was first introduced by commit
:::::: 64701838bf0575ef8acb1ad2db5934e864f3e6c3 x86/percpu: Move preempt_count next to current_task

:::::: TO: Thomas Gleixner <tglx@linutronix.de>
:::::: CC: Peter Zijlstra <peterz@infradead.org>

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