linux-kernel - Re: [PATCH 16/25] ia64/salinfo: Convert to hotplug state machine

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Date:   Fri, 4 Nov 2016 00:22:52 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org, rt@...utronix.de,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>, linux-ia64@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 16/25] ia64/salinfo: Convert to hotplug state machine

Hi Sebastian,

[auto build test WARNING on linus/master]
[also build test WARNING on v4.9-rc3]
[cannot apply to next-20161028]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Sebastian-Andrzej-Siewior/fs-buffer-Convert-to-hotplug-state-machine/20161103-230222
config: ia64-allnoconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=ia64 

All warnings (new ones prefixed by >>):

   In file included from include/linux/kernel.h:12:0,
                    from include/linux/list.h:8,
                    from include/linux/kobject.h:20,
                    from include/linux/device.h:17,
                    from include/linux/node.h:17,
                    from include/linux/cpu.h:16,
                    from arch/ia64/kernel/salinfo.c:40:
   arch/ia64/kernel/salinfo.c: In function 'salinfo_cpu_pre_down':
   arch/ia64/kernel/salinfo.c:572:38: error: 'flags' undeclared (first use in this function)
     spin_lock_irqsave(&data_saved_lock, flags);
                                         ^
   include/linux/typecheck.h:10:9: note: in definition of macro 'typecheck'
     typeof(x) __dummy2; \
            ^
   include/linux/spinlock.h:337:2: note: in expansion of macro 'raw_spin_lock_irqsave'
     raw_spin_lock_irqsave(spinlock_check(lock), flags); \
     ^~~~~~~~~~~~~~~~~~~~~
   arch/ia64/kernel/salinfo.c:572:2: note: in expansion of macro 'spin_lock_irqsave'
     spin_lock_irqsave(&data_saved_lock, flags);
     ^~~~~~~~~~~~~~~~~
   arch/ia64/kernel/salinfo.c:572:38: note: each undeclared identifier is reported only once for each function it appears in
     spin_lock_irqsave(&data_saved_lock, flags);
                                         ^
   include/linux/typecheck.h:10:9: note: in definition of macro 'typecheck'
     typeof(x) __dummy2; \
            ^
   include/linux/spinlock.h:337:2: note: in expansion of macro 'raw_spin_lock_irqsave'
     raw_spin_lock_irqsave(spinlock_check(lock), flags); \
     ^~~~~~~~~~~~~~~~~~~~~
   arch/ia64/kernel/salinfo.c:572:2: note: in expansion of macro 'spin_lock_irqsave'
     spin_lock_irqsave(&data_saved_lock, flags);
     ^~~~~~~~~~~~~~~~~
   include/linux/typecheck.h:11:18: warning: comparison of distinct pointer types lacks a cast
     (void)(&__dummy == &__dummy2); \
                     ^
   include/linux/spinlock.h:229:3: note: in expansion of macro 'typecheck'
      typecheck(unsigned long, flags); \
      ^~~~~~~~~
   include/linux/spinlock.h:337:2: note: in expansion of macro 'raw_spin_lock_irqsave'
     raw_spin_lock_irqsave(spinlock_check(lock), flags); \
     ^~~~~~~~~~~~~~~~~~~~~
   arch/ia64/kernel/salinfo.c:572:2: note: in expansion of macro 'spin_lock_irqsave'
     spin_lock_irqsave(&data_saved_lock, flags);
     ^~~~~~~~~~~~~~~~~
   include/linux/typecheck.h:11:18: warning: comparison of distinct pointer types lacks a cast
     (void)(&__dummy == &__dummy2); \
                     ^
>> include/linux/irqflags.h:63:3: note: in expansion of macro 'typecheck'
      typecheck(unsigned long, flags); \
      ^~~~~~~~~
   include/linux/irqflags.h:124:3: note: in expansion of macro 'raw_local_irq_save'
      raw_local_irq_save(flags);   \
      ^~~~~~~~~~~~~~~~~~
   include/linux/spinlock_api_up.h:40:8: note: in expansion of macro 'local_irq_save'
      do { local_irq_save(flags); __LOCK(lock); } while (0)
           ^~~~~~~~~~~~~~
   include/linux/spinlock_api_up.h:69:45: note: in expansion of macro '__LOCK_IRQSAVE'
    #define _raw_spin_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
                                                ^~~~~~~~~~~~~~
   include/linux/spinlock.h:230:3: note: in expansion of macro '_raw_spin_lock_irqsave'
      _raw_spin_lock_irqsave(lock, flags); \
      ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/spinlock.h:337:2: note: in expansion of macro 'raw_spin_lock_irqsave'
     raw_spin_lock_irqsave(spinlock_check(lock), flags); \
     ^~~~~~~~~~~~~~~~~~~~~
   arch/ia64/kernel/salinfo.c:572:2: note: in expansion of macro 'spin_lock_irqsave'
     spin_lock_irqsave(&data_saved_lock, flags);
     ^~~~~~~~~~~~~~~~~

vim +/typecheck +63 include/linux/irqflags.h

6cd8a4bb Steven Rostedt 2008-05-12  47  #if defined(CONFIG_IRQSOFF_TRACER) || \
6cd8a4bb Steven Rostedt 2008-05-12  48  	defined(CONFIG_PREEMPT_TRACER)
81d68a96 Steven Rostedt 2008-05-12  49   extern void stop_critical_timings(void);
81d68a96 Steven Rostedt 2008-05-12  50   extern void start_critical_timings(void);
81d68a96 Steven Rostedt 2008-05-12  51  #else
81d68a96 Steven Rostedt 2008-05-12  52  # define stop_critical_timings() do { } while (0)
81d68a96 Steven Rostedt 2008-05-12  53  # define start_critical_timings() do { } while (0)
81d68a96 Steven Rostedt 2008-05-12  54  #endif
81d68a96 Steven Rostedt 2008-05-12  55  
df9ee292 David Howells  2010-10-07  56  /*
df9ee292 David Howells  2010-10-07  57   * Wrap the arch provided IRQ routines to provide appropriate checks.
df9ee292 David Howells  2010-10-07  58   */
df9ee292 David Howells  2010-10-07  59  #define raw_local_irq_disable()		arch_local_irq_disable()
df9ee292 David Howells  2010-10-07  60  #define raw_local_irq_enable()		arch_local_irq_enable()
df9ee292 David Howells  2010-10-07  61  #define raw_local_irq_save(flags)			\
df9ee292 David Howells  2010-10-07  62  	do {						\
df9ee292 David Howells  2010-10-07 @63  		typecheck(unsigned long, flags);	\
df9ee292 David Howells  2010-10-07  64  		flags = arch_local_irq_save();		\
df9ee292 David Howells  2010-10-07  65  	} while (0)
df9ee292 David Howells  2010-10-07  66  #define raw_local_irq_restore(flags)			\
df9ee292 David Howells  2010-10-07  67  	do {						\
df9ee292 David Howells  2010-10-07  68  		typecheck(unsigned long, flags);	\
df9ee292 David Howells  2010-10-07  69  		arch_local_irq_restore(flags);		\
df9ee292 David Howells  2010-10-07  70  	} while (0)
df9ee292 David Howells  2010-10-07  71  #define raw_local_save_flags(flags)			\

:::::: The code at line 63 was first introduced by commit
:::::: df9ee29270c11dba7d0fe0b83ce47a4d8e8d2101 Fix IRQ flag handling naming

:::::: TO: David Howells <dhowells@...hat.com>
:::::: CC: David Howells <dhowells@...hat.com>

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