[dhowells-fs:afs-next 40/43] fs/afs/callback.c:82:6: error: invalid output size for constraint '+q'

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git afs-next
head:   f1302568cc65d3fdd85e6413688779e5235f4e2b
commit: b8f604776e35dd984fbf93f49276543461cbbb22 [40/43] afs: Overhaul invalidation handling to better support RO volumes
config: i386-allyesconfig (https://download.01.org/0day-ci/archive/20231213/202312131803.JZPzoKWV-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231213/202312131803.JZPzoKWV-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/202312131803.JZPzoKWV-lkp@intel.com/

All errors (new ones prefixed by >>):

>> fs/afs/callback.c:82:6: error: invalid output size for constraint '+q'
           if (xchg(&vnode->cb_expires_at, AFS_NO_CB_PROMISE) != AFS_NO_CB_PROMISE) {
               ^
   include/linux/atomic/atomic-instrumented.h:4716:2: note: expanded from macro 'xchg'
           raw_xchg(__ai_ptr, __VA_ARGS__); \
           ^
   include/linux/atomic/atomic-arch-fallback.h:12:18: note: expanded from macro 'raw_xchg'
   #define raw_xchg arch_xchg
                    ^
   arch/x86/include/asm/cmpxchg.h:78:27: note: expanded from macro 'arch_xchg'
   #define arch_xchg(ptr, v)       __xchg_op((ptr), (v), xchg, "")
                                   ^
   arch/x86/include/asm/cmpxchg.h:48:19: note: expanded from macro '__xchg_op'
                                         : "+q" (__ret), "+m" (*(ptr))     \
                                                 ^
   1 error generated.
--
>> fs/afs/rotate.c:62:7: error: invalid output size for constraint '+q'
                   if (xchg(&vnode->cb_expires_at, AFS_NO_CB_PROMISE) != AFS_NO_CB_PROMISE)
                       ^
   include/linux/atomic/atomic-instrumented.h:4716:2: note: expanded from macro 'xchg'
           raw_xchg(__ai_ptr, __VA_ARGS__); \
           ^
   include/linux/atomic/atomic-arch-fallback.h:12:18: note: expanded from macro 'raw_xchg'
   #define raw_xchg arch_xchg
                    ^
   arch/x86/include/asm/cmpxchg.h:78:27: note: expanded from macro 'arch_xchg'
   #define arch_xchg(ptr, v)       __xchg_op((ptr), (v), xchg, "")
                                   ^
   arch/x86/include/asm/cmpxchg.h:48:19: note: expanded from macro '__xchg_op'
                                         : "+q" (__ret), "+m" (*(ptr))     \
                                                 ^
   1 error generated.


vim +82 fs/afs/callback.c

    73	
    74	/*
    75	 * actually break a callback
    76	 */
    77	void __afs_break_callback(struct afs_vnode *vnode, enum afs_cb_break_reason reason)
    78	{
    79		_enter("");
    80	
    81		clear_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags);
  > 82		if (xchg(&vnode->cb_expires_at, AFS_NO_CB_PROMISE) != AFS_NO_CB_PROMISE) {
    83			vnode->cb_break++;
    84			vnode->cb_v_check = atomic_read(&vnode->volume->cb_v_break);
    85			afs_clear_permits(vnode);
    86	
    87			if (vnode->lock_state == AFS_VNODE_LOCK_WAITING_FOR_CB)
    88				afs_lock_may_be_available(vnode);
    89	
    90			if (reason != afs_cb_break_for_deleted &&
    91			    vnode->status.type == AFS_FTYPE_FILE &&
    92			    atomic_read(&vnode->cb_nr_mmap))
    93				queue_work(system_unbound_wq, &vnode->cb_work);
    94	
    95			trace_afs_cb_break(&vnode->fid, vnode->cb_break, reason, true);
    96		} else {
    97			trace_afs_cb_break(&vnode->fid, vnode->cb_break, reason, false);
    98		}
    99	}
   100	

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