Hi Lucas,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on bb4f6b2281b11b009210f62eecd291f7b75c1e85]

url:    https://github.com/intel-lab-lkp/linux/commits/Lucas-De-Marchi/drm-i915-Improvements-to-stolen-memory-setup/20220916-044155
base:   bb4f6b2281b11b009210f62eecd291f7b75c1e85
config: i386-defconfig
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/b0c14c92efecabadc483675b606c1ce109cfa415
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Lucas-De-Marchi/drm-i915-Improvements-to-stolen-memory-setup/20220916-044155
        git checkout b0c14c92efecabadc483675b606c1ce109cfa415
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   In file included from include/linux/bitops.h:6,
                    from include/linux/kernel.h:22,
                    from arch/x86/include/asm/percpu.h:27,
                    from arch/x86/include/asm/current.h:6,
                    from include/linux/mutex.h:14,
                    from drivers/gpu/drm/i915/gem/i915_gem_stolen.c:8:
   drivers/gpu/drm/i915/gem/i915_gem_stolen.c: In function 'i915_gem_stolen_lmem_setup':
>> include/linux/bits.h:36:18: error: right shift count is negative [-Werror=shift-count-negative]
      36 |          (~UL(0) >> (BITS_PER_LONG - 1 - (h))))
         |                  ^~
   include/linux/bits.h:38:38: note: in expansion of macro '__GENMASK'
      38 |         (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
         |                                      ^~~~~~~~~
   drivers/gpu/drm/i915/i915_reg.h:7956:41: note: in expansion of macro 'GENMASK'
    7956 | #define   GEN12_BDSM_MASK               GENMASK(63, 20)
         |                                         ^~~~~~~
   drivers/gpu/drm/i915/gem/i915_gem_stolen.c:817:65: note: in expansion of macro 'GEN12_BDSM_MASK'
     817 |         dsm_base = intel_uncore_read64(uncore, GEN12_DSMBASE) & GEN12_BDSM_MASK;
         |                                                                 ^~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +36 include/linux/bits.h

295bcca84916cb5 Rikard Falkeborn 2020-04-06  33  
295bcca84916cb5 Rikard Falkeborn 2020-04-06  34  #define __GENMASK(h, l) \
95b980d62d52c4c Masahiro Yamada  2019-07-16  35  	(((~UL(0)) - (UL(1) << (l)) + 1) & \
95b980d62d52c4c Masahiro Yamada  2019-07-16 @36  	 (~UL(0) >> (BITS_PER_LONG - 1 - (h))))
295bcca84916cb5 Rikard Falkeborn 2020-04-06  37  #define GENMASK(h, l) \
295bcca84916cb5 Rikard Falkeborn 2020-04-06  38  	(GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
8bd9cb51daac893 Will Deacon      2018-06-19  39  

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