Hi Stanislav,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on drm-intel/for-linux-next]
[cannot apply to drm-tip/drm-tip v5.7-rc5 next-20200515]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Stanislav-Lisovskiy/Consider-DBuf-bandwidth-when-calculating-CDCLK/20200514-232752
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: i386-allyesconfig (attached as .config)
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-193-gb8fad4bc-dirty
        # save the attached .config to linux build tree
        make C=1 ARCH=i386 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

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

All errors (new ones prefixed by >>, old ones prefixed by <<):

drivers/gpu/drm/i915/display/intel_display.c: In function 'intel_atomic_check_planes':
drivers/gpu/drm/i915/display/intel_display.c:14695:2: error: 'new_cdclk_state' undeclared (first use in this function); did you mean 'intel_cdclk_state'?
new_cdclk_state = intel_atomic_get_new_cdclk_state(state);
^~~~~~~~~~~~~~~
intel_cdclk_state
drivers/gpu/drm/i915/display/intel_display.c:14695:2: note: each undeclared identifier is reported only once for each function it appears in
drivers/gpu/drm/i915/display/intel_display.c:14698:4: error: 'need_cdclk_calc' undeclared (first use in this function); did you mean 'intel_cdclk_vals'?
*need_cdclk_calc = true;
^~~~~~~~~~~~~~~
intel_cdclk_vals
In file included from include/linux/list.h:9:0,
from include/linux/kobject.h:19,
from include/linux/of.h:17,
from include/linux/irqdomain.h:35,
from include/linux/acpi.h:13,
from include/linux/i2c.h:13,
from drivers/gpu/drm/i915/display/intel_display.c:27:
>> include/linux/kernel.h:866:2: error: first argument to '__builtin_choose_expr' not a constant
__builtin_choose_expr(__safe_cmp(x, y),      ^
include/linux/kernel.h:882:19: note: in expansion of macro '__careful_cmp'
#define max(x, y) __careful_cmp(x, y, >)
^~~~~~~~~~~~~
drivers/gpu/drm/i915/display/intel_display.c:14711:15: note: in expansion of macro 'max'
min_cdclk = max(new_cdclk_state->min_cdclk[crtc->pipe], min_cdclk);
^~~
drivers/gpu/drm/i915/display/intel_display.c: In function 'intel_atomic_check_cdclk':
drivers/gpu/drm/i915/display/intel_display.c:14736:21: warning: unused variable 'crtc' [-Wunused-variable]
struct intel_crtc *crtc;
^~~~
drivers/gpu/drm/i915/display/intel_display.c:14735:27: warning: unused variable 'new_crtc_state' [-Wunused-variable]
struct intel_crtc_state *new_crtc_state;
^~~~~~~~~~~~~~
drivers/gpu/drm/i915/display/intel_display.c:14734:28: warning: unused variable 'new_cdclk_state' [-Wunused-variable]
struct intel_cdclk_state *new_cdclk_state;
^~~~~~~~~~~~~~~

vim +/__builtin_choose_expr +866 include/linux/kernel.h

3c8ba0d61d04ce Kees Cook      2018-03-30  859  
e9092d0d979611 Linus Torvalds 2018-04-09  860  #define __cmp_once(x, y, unique_x, unique_y, op) ({	\
e9092d0d979611 Linus Torvalds 2018-04-09  861  		typeof(x) unique_x = (x);		\
e9092d0d979611 Linus Torvalds 2018-04-09  862  		typeof(y) unique_y = (y);		\
e9092d0d979611 Linus Torvalds 2018-04-09  863  		__cmp(unique_x, unique_y, op); })
3c8ba0d61d04ce Kees Cook      2018-03-30  864  
3c8ba0d61d04ce Kees Cook      2018-03-30  865  #define __careful_cmp(x, y, op) \
3c8ba0d61d04ce Kees Cook      2018-03-30 @866  	__builtin_choose_expr(__safe_cmp(x, y), \
e9092d0d979611 Linus Torvalds 2018-04-09  867  		__cmp(x, y, op), \
e9092d0d979611 Linus Torvalds 2018-04-09  868  		__cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op))
e8c97af0c1f23d Randy Dunlap   2017-10-13  869  

:::::: The code at line 866 was first introduced by commit
:::::: 3c8ba0d61d04ced9f8d9ff93977995a9e4e96e91 kernel.h: Retain constant expression output for max()/min()

:::::: TO: Kees Cook <keescook@chromium.org>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

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