linux-kernel - Re: [PATCH 3/3] linux/bitmap: Replace find_fisrt_{zero

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Message-ID: <201511191057.JOoDSHXo%fengguang.wu@intel.com>
Date:	Thu, 19 Nov 2015 10:53:28 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Jia He <hejianet@...il.com>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Michal Nazarewicz <mina86@...a86.com>,
	Yury Norov <yury.norov@...il.com>, Tejun Heo <tj@...nel.org>,
	Martin Kepplinger <martink@...teo.de>,
	George Spelvin <linux@...izon.com>,
	Ingo Molnar <mingo@...nel.org>, Arnd Bergmann <arnd@...db.de>,
	Jia He <hejianet@...il.com>
Subject: Re: [PATCH 3/3] linux/bitmap: Replace find_fisrt_{zero_}bit with the
 new lightweight api

Hi Jia,

[auto build test ERROR on: v4.4-rc1]
[also build test ERROR on: next-20151118]

url:    https://github.com/0day-ci/linux/commits/Jia-He/Improve-bitmap_empty-and-bitmap_full/20151119-103554
config: m68k-allyesconfig (attached as .config)
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=m68k 

All errors (new ones prefixed by >>):

   kernel/time/Kconfig:155:warning: range is invalid
   warning: (USB_OTG_FSM && FSL_USB2_OTG && USB_MV_OTG) selects USB_OTG which has unmet direct dependencies (USB_SUPPORT && USB && PM)
   warning: (SINGLE_MEMORY_CHUNK) selects NEED_MULTIPLE_NODES which has unmet direct dependencies (DISCONTIGMEM || NUMA)
   warning: (PREEMPT && DEBUG_ATOMIC_SLEEP) selects PREEMPT_COUNT which has unmet direct dependencies (COLDFIRE)
   warning: (USB_OTG_FSM && FSL_USB2_OTG && USB_MV_OTG) selects USB_OTG which has unmet direct dependencies (USB_SUPPORT && USB && PM)
   warning: (SINGLE_MEMORY_CHUNK) selects NEED_MULTIPLE_NODES which has unmet direct dependencies (DISCONTIGMEM || NUMA)
   warning: (PREEMPT && DEBUG_ATOMIC_SLEEP) selects PREEMPT_COUNT which has unmet direct dependencies (COLDFIRE)
   In file included from include/linux/cpumask.h:11:0,
                    from include/linux/rcupdate.h:40,
                    from include/linux/rbtree.h:34,
                    from include/linux/sched.h:22,
                    from arch/m68k/kernel/asm-offsets.c:14:
   include/linux/bitmap.h: In function 'bitmap_empty':
>> include/linux/bitmap.h:284:2: error: implicit declaration of function 'all_bit_is_zero' [-Werror=implicit-function-declaration]
     return all_bit_is_zero(src, nbits);
     ^
   include/linux/bitmap.h: In function 'bitmap_full':
>> include/linux/bitmap.h:292:2: error: implicit declaration of function 'all_bit_is_one' [-Werror=implicit-function-declaration]
     return all_bit_is_one(src, nbits);
     ^
   cc1: some warnings being treated as errors
   make[2]: *** [arch/m68k/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [sub-make] Error 2

vim +/all_bit_is_zero +284 include/linux/bitmap.h

   278	
   279	static inline int bitmap_empty(const unsigned long *src, unsigned nbits)
   280	{
   281		if (small_const_nbits(nbits))
   282			return ! (*src & BITMAP_LAST_WORD_MASK(nbits));
   283	
 > 284		return all_bit_is_zero(src, nbits);
   285	}
   286	
   287	static inline int bitmap_full(const unsigned long *src, unsigned int nbits)
   288	{
   289		if (small_const_nbits(nbits))
   290			return ! (~(*src) & BITMAP_LAST_WORD_MASK(nbits));
   291	
 > 292		return all_bit_is_one(src, nbits);
   293	}
   294	
   295	static __always_inline int bitmap_weight(const unsigned long *src, unsigned int nbits)

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