[dhowells-fs:fscache-iter 21/27] fs/afs/file.c:453:7: error: implicit declaration of function 'try_cmpxchg'; did you mean 'xa_cmpxchg'?

[dhowells-fs:fscache-iter 21/27] fs/afs/file.c:453:7: error: implicit declaration of function 'try_cmpxchg'; did you mean 'xa_cmpxchg'?

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 2423 bytes --]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-iter
head:   d72ed03ddefa7348c1a563c7e4d49c8ba594ab2d
commit: 8abd21c233f87626def5c24547ce5029d1ee3680 [21/27] afs: Use new fscache I/O API
config: xtensa-allyesconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 8abd21c233f87626def5c24547ce5029d1ee3680
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=xtensa 

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

All error/warnings (new ones prefixed by >>):

   fs/afs/file.c: In function 'afs_open_cache':
>> fs/afs/file.c:453:7: error: implicit declaration of function 'try_cmpxchg'; did you mean 'xa_cmpxchg'? [-Werror=implicit-function-declaration]
     if (!try_cmpxchg(&af->cache_io, &old, handle)) {
          ^~~~~~~~~~~
          xa_cmpxchg
   In file included from fs/afs/file.c:17:0:
   fs/afs/file.c: In function 'afs_readpages_one':
>> fs/afs/internal.h:1443:2: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
     printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
     ^~~~~~
   fs/afs/file.c:536:6: note: 'ret' was declared here
     int ret;
         ^~~
   cc1: some warnings being treated as errors

vim +453 fs/afs/file.c

   434	
   435	/*
   436	 * Open the cache I/O handle.
   437	 */
   438	static struct fscache_io_handle *afs_open_cache(struct file *file,
   439							struct afs_vnode *vnode)
   440	{
   441		struct fscache_io_handle *handle, *old;
   442		struct afs_file *af = file->private_data;
   443	
   444		handle = af->cache_io;
   445		if (handle)
   446			return handle;
   447	
   448		handle = fscache_open_io_handle(vnode->cache);
   449		if (!handle)
   450			return handle;
   451	
   452		old = NULL;
 > 453		if (!try_cmpxchg(&af->cache_io, &old, handle)) {
   454			ASSERTCMP(old, ==, handle);
   455			fscache_put_io_handle(handle);
   456		}
   457	
   458		return handle;
   459	}
   460	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 59580 bytes --]