Re: [PATCH] drm/msm: Fix shrinker deadlock

[kernel test robot]

Hi Daniel,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-misc/drm-misc-next]
[also build test ERROR on linus/master v7.1-rc2 next-20260508]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Daniel-J-Blueman/drm-msm-Fix-shrinker-deadlock/20260510-132942
base:   https://gitlab.freedesktop.org/drm/misc/kernel.git drm-misc-next
patch link:    https://lore.kernel.org/r/20260508065722.18785-1-daniel%40quora.org
patch subject: [PATCH] drm/msm: Fix shrinker deadlock
config: um-allmodconfig (https://download.01.org/0day-ci/archive/20260510/202605102047.JRDq9587-lkp@xxxxxxxxx/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260510/202605102047.JRDq9587-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605102047.JRDq9587-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   In file included from drivers/gpu/drm/msm/msm_gem_shrinker.c:10:
   In file included from drivers/gpu/drm/msm/msm_drv.h:22:
   In file included from include/linux/iommu.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/um/include/asm/io.h:24:
   include/asm-generic/io.h:1209:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
    1209 |         return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
         |                                                   ~~~~~~~~~~ ^
>> drivers/gpu/drm/msm/msm_gem_shrinker.c:125:46: error: too many arguments to function call, expected 2, have 3
     125 |         return with_vm_locks(ticket, msm_gem_evict, obj);
         |                ~~~~~~~~~~~~~                        ^~~
   drivers/gpu/drm/msm/msm_gem_shrinker.c:46:1: note: 'with_vm_locks' declared here
      46 | with_vm_locks(void (*fn)(struct drm_gem_object *obj),
         | ^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      47 |               struct drm_gem_object *obj)
         |               ~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning and 1 error generated.


vim +125 drivers/gpu/drm/msm/msm_gem_shrinker.c

6afb0750dba05c Rob Clark 2021-04-05  115  
63f17ef834284d Rob Clark 2021-04-05  116  static bool
02070f04987524 Rob Clark 2025-06-29  117  evict(struct drm_gem_object *obj, struct ww_acquire_ctx *ticket)
63f17ef834284d Rob Clark 2021-04-05  118  {
b352ba54a82072 Rob Clark 2022-08-02  119  	if (is_unevictable(to_msm_bo(obj)))
63f17ef834284d Rob Clark 2021-04-05  120  		return false;
63f17ef834284d Rob Clark 2021-04-05  121  
b352ba54a82072 Rob Clark 2022-08-02  122  	if (msm_gem_active(obj))
01780d02634a3a Rob Clark 2022-08-02  123  		return false;
01780d02634a3a Rob Clark 2022-08-02  124  
fe4952b5f27cca Rob Clark 2025-06-29 @125  	return with_vm_locks(ticket, msm_gem_evict, obj);
63f17ef834284d Rob Clark 2021-04-05  126  }
63f17ef834284d Rob Clark 2021-04-05  127  

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