tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git core/wip-u128
head:   901a34d8b5f52525b0cd02fd385429473430c495
commit: eb38cf9c437c67033c715adf08324d4cc9d4082d [3/9] arch: Introduce arch_{,try_}_cmpxchg128{,_local}()
config: x86_64-randconfig-a013
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=eb38cf9c437c67033c715adf08324d4cc9d4082d
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue core/wip-u128
        git checkout eb38cf9c437c67033c715adf08324d4cc9d4082d
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from include/crypto/gf128mul.h:53,
                    from crypto/gf128mul.c:51:
   include/crypto/b128ops.h:54:3: error: conflicting types for 'u128'; have 'struct <anonymous>'
      54 | } u128;
         |   ^~~~
   In file included from include/uapi/linux/byteorder/little_endian.h:13,
                    from include/linux/byteorder/little_endian.h:5,
                    from arch/x86/include/uapi/asm/byteorder.h:5,
                    from include/crypto/gf128mul.h:52,
                    from crypto/gf128mul.c:51:
   include/linux/types.h:15:16: note: previous declaration of 'u128' with type 'u128' {aka '__int128 unsigned'}
      15 | typedef __u128 u128;
         |                ^~~~
   In file included from arch/x86/include/asm/cmpxchg.h:145,
                    from arch/x86/include/asm/atomic.h:8,
                    from include/linux/atomic.h:7,
                    from include/linux/cpumask.h:13,
                    from arch/x86/include/asm/cpumask.h:5,
                    from arch/x86/include/asm/msr.h:11,
                    from arch/x86/include/asm/processor.h:22,
                    from arch/x86/include/asm/cpufeature.h:5,
                    from arch/x86/include/asm/thread_info.h:53,
                    from include/linux/thread_info.h:60,
                    from arch/x86/include/asm/preempt.h:9,
                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:56,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:7,
                    from include/linux/slab.h:15,
                    from include/crypto/gf128mul.h:54,
                    from crypto/gf128mul.c:51:
   arch/x86/include/asm/cmpxchg_64.h: In function 'arch_cmpxchg128':
>> arch/x86/include/asm/cmpxchg_64.h:40:17: error: incompatible types when returning type 'u128' but 'bool' {aka '_Bool'} was expected
      40 |         return o.full;
         |                ~^~~~~
   arch/x86/include/asm/cmpxchg_64.h: In function 'arch_cmpxchg128_local':
   arch/x86/include/asm/cmpxchg_64.h:53:17: error: incompatible types when returning type 'u128' but 'bool' {aka '_Bool'} was expected
      53 |         return o.full;
         |                ~^~~~~


vim +40 arch/x86/include/asm/cmpxchg_64.h

    29	
    30	static __always_inline bool arch_cmpxchg128(volatile u128 *ptr, u128 old, u128 new)
    31	{
    32		union __u128_halves o = { .full = old, }, n = { .full = new, };
    33	
    34		asm volatile(LOCK_PREFIX "cmpxchg16b %[ptr]"
    35			     : [ptr] "+m" (*ptr),
    36			       "+a" (o.low), "+d" (o.high)
    37			     : "b" (n.low), "c" (n.high)
    38			     : "memory");
    39	
  > 40		return o.full;
    41	}
    42	

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