Re: [PATCH] cedrus: Convert bitfield macros to FIELD_PREP for clarity

kernel test robot
2026-01-30T07:52:44Z

Hi Andrew,

kernel test robot noticed the following build errors:

[auto build test ERROR on sunxi/sunxi/for-next]
[also build test ERROR on linus/master v6.19-rc7 next-20260129]
[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/Andrew-Geyko/cedrus-Convert-bitfield-macros-to-FIELD_PREP-for-clarity/20260130-004554
base: https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux.git sunxi/for-next
patch link: https://lore.kernel.org/r/20260129164341.104155-1-ageyko0%40gmail.com
patch subject: [PATCH] cedrus: Convert bitfield macros to FIELD_PREP for clarity
config: parisc-allyesconfig (https://download.01.org/0day-ci/archive/20260130/202601301548.SMgNvRPx-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260130/202601301548.SMgNvRPx-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601301548.SMgNvRPx-lkp@intel.com/

All errors (new ones prefixed by >>):

In file included from drivers/staging/media/sunxi/cedrus/cedrus_h265.c:17:
drivers/staging/media/sunxi/cedrus/cedrus_h265.c: In function 'cedrus_h265_skip_bits':
>> drivers/staging/media/sunxi/cedrus/cedrus_regs.h:434:40: error: implicit declaration of function 'FIELD_PREP' [-Wimplicit-function-declaration]
434 | #define VE_DEC_H265_TRIGGER_FLUSH_BITS FIELD_PREP(VE_DEC_H265_TRIGGER_CMD_MASK, 0x3)
| ^~~~~~~~~~
drivers/staging/media/sunxi/cedrus/cedrus_h265.c:248:30: note: in expansion of macro 'VE_DEC_H265_TRIGGER_FLUSH_BITS'
248 | VE_DEC_H265_TRIGGER_FLUSH_BITS |
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/FIELD_PREP +434 drivers/staging/media/sunxi/cedrus/cedrus_regs.h

425
426 #define VE_DEC_H265_TRIGGER_TYPE_N_BITS(x) (((x) & 0x3f) << 8)
427 #define VE_DEC_H265_TRIGGER_STCD_MASK GENMASK(5, 4)
428 #define VE_DEC_H265_TRIGGER_CMD_MASK GENMASK(3, 0)
429 #define VE_DEC_H265_TRIGGER_STCD_HEVC FIELD_PREP(VE_DEC_H265_TRIGGER_STCD_MASK, 0x0)
430 #define VE_DEC_H265_TRIGGER_STCD_AVS FIELD_PREP(VE_DEC_H265_TRIGGER_STCD_MASK, 0x1)
431 #define VE_DEC_H265_TRIGGER_STCD_VC1 FIELD_PREP(VE_DEC_H265_TRIGGER_STCD_MASK, 0x2)
432 #define VE_DEC_H265_TRIGGER_SHOW_BITS FIELD_PREP(VE_DEC_H265_TRIGGER_CMD_MASK, 0x1)
433 #define VE_DEC_H265_TRIGGER_GET_BITS FIELD_PREP(VE_DEC_H265_TRIGGER_CMD_MASK, 0x2)
> 434 #define VE_DEC_H265_TRIGGER_FLUSH_BITS FIELD_PREP(VE_DEC_H265_TRIGGER_CMD_MASK, 0x3)
435 #define VE_DEC_H265_TRIGGER_GET_VLCSE FIELD_PREP(VE_DEC_H265_TRIGGER_CMD_MASK, 0x4)
436 #define VE_DEC_H265_TRIGGER_GET_VLCUE FIELD_PREP(VE_DEC_H265_TRIGGER_CMD_MASK, 0x5)
437 #define VE_DEC_H265_TRIGGER_BYTE_ALIGN FIELD_PREP(VE_DEC_H265_TRIGGER_CMD_MASK, 0x6)
438 #define VE_DEC_H265_TRIGGER_INIT_SWDEC FIELD_PREP(VE_DEC_H265_TRIGGER_CMD_MASK, 0x7)
439 #define VE_DEC_H265_TRIGGER_DEC_SLICE FIELD_PREP(VE_DEC_H265_TRIGGER_CMD_MASK, 0x8)
440

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