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Subjectdrivers/gpu/drm/amd/amdgpu/amdgpu_mes.c:864:13: warning: variable 'r' set but not used
Hi Jack,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: eb555cb5b794f4e12a9897f3d46d5a72104cd4a7
commit: e3652b0976f383dea912607a404e974632b019b1 drm/amdgpu/mes: add helper functions to alloc/free ctx metadata
date: 3 months ago
config: arc-randconfig-r043-20220808 (https://download.01.org/0day-ci/archive/20220809/202208092032.V6o0PjnJ-lkp@intel.com/config)
compiler: arceb-elf-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e3652b0976f383dea912607a404e974632b019b1
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout e3652b0976f383dea912607a404e974632b019b1
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash drivers/gpu/drm/amd/amdgpu/

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

All warnings (new ones prefixed by >>):

In file included from include/asm-generic/bug.h:22,
from arch/arc/include/asm/bug.h:30,
from include/linux/bug.h:5,
from include/linux/thread_info.h:13,
from include/asm-generic/current.h:5,
from arch/arc/include/asm/current.h:20,
from include/linux/mutex.h:14,
from include/linux/kernfs.h:11,
from include/linux/sysfs.h:16,
from include/linux/kobject.h:20,
from include/linux/of.h:17,
from include/linux/irqdomain.h:35,
from drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h:27,
from drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h:27,
from drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c:24:
drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c: In function 'amdgpu_mes_doorbell_init':
include/linux/kern_levels.h:5:25: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size_t' {aka 'unsigned int'} [-Wformat=]
5 | #define KERN_SOH "\001" /* ASCII Start Of Header */
| ^~~~~~
include/linux/printk.h:418:25: note: in definition of macro 'printk_index_wrap'
418 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~
include/drm/drm_print.h:494:9: note: in expansion of macro 'printk'
494 | printk##once(KERN_##level "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
| ^~~~~~
include/linux/kern_levels.h:14:25: note: in expansion of macro 'KERN_SOH'
14 | #define KERN_INFO KERN_SOH "6" /* informational */
| ^~~~~~~~
include/drm/drm_print.h:494:22: note: in expansion of macro 'KERN_INFO'
494 | printk##once(KERN_##level "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
| ^~~~~
include/drm/drm_print.h:498:9: note: in expansion of macro '_DRM_PRINTK'
498 | _DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c:131:9: note: in expansion of macro 'DRM_INFO'
131 | DRM_INFO("max_doorbell_slices=%ld\n", doorbell_process_limit);
| ^~~~~~~~
drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c: In function 'amdgpu_mes_ctx_alloc_meta_data':
>> drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c:864:13: warning: variable 'r' set but not used [-Wunused-but-set-variable]
864 | int r;
| ^


vim +/r +864 drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c

860
861 int amdgpu_mes_ctx_alloc_meta_data(struct amdgpu_device *adev,
862 struct amdgpu_mes_ctx_data *ctx_data)
863 {
> 864 int r;
865
866 r = amdgpu_bo_create_kernel(adev,
867 sizeof(struct amdgpu_mes_ctx_meta_data),
868 PAGE_SIZE, AMDGPU_GEM_DOMAIN_GTT,
869 &ctx_data->meta_data_obj, NULL,
870 &ctx_data->meta_data_ptr);
871 if (!ctx_data->meta_data_obj)
872 return -ENOMEM;
873
874 memset(ctx_data->meta_data_ptr, 0,
875 sizeof(struct amdgpu_mes_ctx_meta_data));
876
877 return 0;
878 }
879

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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