[drm-drm-misc:drm-misc-next 1/1] drivers/gpu/drm/ttm/ttm_device.c:39:1: sparse: sparse: symbol 'ttm_global_mutex' was not declared. Should it be

[drm-drm-misc:drm-misc-next 1/1] drivers/gpu/drm/ttm/ttm_device.c:39:1: sparse: sparse: symbol 'ttm_global_mutex' was not declared. Should it be

[kernel test robot]

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tree:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
head:   8af8a109b34fa88b8b91f25d11485b37d37549c3
commit: 8af8a109b34fa88b8b91f25d11485b37d37549c3 [1/1] drm/ttm: device naming cleanup
config: x86_64-randconfig-s022-20210121 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-208-g46a52ca4-dirty
        git remote add drm-drm-misc git://anongit.freedesktop.org/drm/drm-misc
        git fetch --no-tags drm-drm-misc drm-misc-next
        git checkout 8af8a109b34fa88b8b91f25d11485b37d37549c3
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

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


"sparse warnings: (new ones prefixed by >>)"
>> drivers/gpu/drm/ttm/ttm_device.c:39:1: sparse: sparse: symbol 'ttm_global_mutex' was not declared. Should it be static?
>> drivers/gpu/drm/ttm/ttm_device.c:40:10: sparse: sparse: symbol 'ttm_glob_use_count' was not declared. Should it be static?

Please review and possibly fold the followup patch.

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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[RFC PATCH drm-drm-misc] drm/ttm: ttm_global_mutex can be static

[kernel test robot]

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Fixes: 8af8a109b34f ("drm/ttm: device naming cleanup")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
---
 ttm_device.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c
index ac0903c9e60ae79..9dee362390f7ed2 100644
--- a/drivers/gpu/drm/ttm/ttm_device.c
+++ b/drivers/gpu/drm/ttm/ttm_device.c
@@ -36,8 +36,8 @@
 /**
  * ttm_global_mutex - protecting the global state
  */
-DEFINE_MUTEX(ttm_global_mutex);
-unsigned ttm_glob_use_count;
+static DEFINE_MUTEX(ttm_global_mutex);
+static unsigned ttm_glob_use_count;
 struct ttm_global ttm_glob;
 EXPORT_SYMBOL(ttm_glob);