[PATCH v2] dma-buf: allow nested dma_resv_reserve_fences

[kernel test robot]

Hi Yunxiang,

kernel test robot noticed the following build errors:



url:    https://github.com/intel-lab-lkp/linux/commits/UPDATE-20230624-040209/Yunxiang-Li/drm-amdgpu-fix-missing-fence-reserve-in-amdgpu_vm_sdma_commit/20230622-002915
base:   the 2th patch of https://lore.kernel.org/r/20230621162652.10875-3-Yunxiang.Li%40amd.com
patch link:    https://lore.kernel.org/r/20230623200113.62051-1-Yunxiang.Li%40amd.com
patch subject: [PATCH v2] dma-buf: allow nested dma_resv_reserve_fences
config: arc-randconfig-r006-20230622 (https://download.01.org/0day-ci/archive/20230624/202306240508.nAff52YL-lkp@intel.com/config)
compiler: arceb-elf-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230624/202306240508.nAff52YL-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306240508.nAff52YL-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/dma-buf/dma-resv.c: In function 'dma_resv_add_fence':
   drivers/dma-buf/dma-resv.c:326: error: unterminated #else
     326 | #ifdef CONFIG_DEBUG_MUTEXES
         | 
   drivers/dma-buf/dma-resv.c:327:9: note: '-Wmisleading-indentation' is disabled from this point onwards, since column-tracking was disabled due to the size of the code/headers
     327 |         else
         |         ^~~~
   drivers/dma-buf/dma-resv.c:327:9: note: adding '-flarge-source-files' will allow for more column-tracking support, at the expense of compilation time and memory
   In file included from include/linux/build_bug.h:5,
                    from include/linux/container_of.h:5,
                    from include/linux/list.h:5,
                    from include/linux/mutex.h:15,
                    from include/linux/ww_mutex.h:20,
                    from include/linux/dma-resv.h:42,
                    from drivers/dma-buf/dma-resv.c:36:
>> include/linux/compiler.h:24:39: error: expected declaration or statement at end of input
      24 |                         static struct ftrace_likely_data                \
         |                                       ^~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:47:26: note: in expansion of macro '__branch_check__'
      47 | #  define unlikely(x)   (__branch_check__(x, 0, __builtin_constant_p(x)))
         |                          ^~~~~~~~~~~~~~~~
   include/asm-generic/bug.h:125:9: note: in expansion of macro 'unlikely'
     125 |         unlikely(__ret_warn_on);                                        \
         |         ^~~~~~~~
   drivers/dma-buf/dma-resv.c:328:17: note: in expansion of macro 'WARN_ON'
     328 |                 WARN_ON(1); // missing fence slot allocation
         |                 ^~~~~~~


vim +24 include/linux/compiler.h

1f0d69a9fc815d Steven Rostedt          2008-11-12  21  
d45ae1f7041ac5 Steven Rostedt (VMware  2017-01-17  22) #define __branch_check__(x, expect, is_constant) ({			\
2026d35741f2c3 Mikulas Patocka         2018-05-30  23  			long ______r;					\
134e6a034cb004 Steven Rostedt (VMware  2017-01-19 @24) 			static struct ftrace_likely_data		\
e04462fb82f8dd Miguel Ojeda            2018-09-03  25  				__aligned(4)				\
33def8498fdde1 Joe Perches             2020-10-21  26  				__section("_ftrace_annotated_branch")	\
1f0d69a9fc815d Steven Rostedt          2008-11-12  27  				______f = {				\
134e6a034cb004 Steven Rostedt (VMware  2017-01-19  28) 				.data.func = __func__,			\
134e6a034cb004 Steven Rostedt (VMware  2017-01-19  29) 				.data.file = __FILE__,			\
134e6a034cb004 Steven Rostedt (VMware  2017-01-19  30) 				.data.line = __LINE__,			\
1f0d69a9fc815d Steven Rostedt          2008-11-12  31  			};						\
d45ae1f7041ac5 Steven Rostedt (VMware  2017-01-17  32) 			______r = __builtin_expect(!!(x), expect);	\
d45ae1f7041ac5 Steven Rostedt (VMware  2017-01-17  33) 			ftrace_likely_update(&______f, ______r,		\
d45ae1f7041ac5 Steven Rostedt (VMware  2017-01-17  34) 					     expect, is_constant);	\
1f0d69a9fc815d Steven Rostedt          2008-11-12  35  			______r;					\
1f0d69a9fc815d Steven Rostedt          2008-11-12  36  		})
1f0d69a9fc815d Steven Rostedt          2008-11-12  37  

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