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Message-ID: <202512051834.bESvhDiG-lkp@intel.com>
Date: Fri, 5 Dec 2025 18:16:52 +0800
From: kernel test robot <lkp@...el.com>
To: Marek Vasut <marek.vasut+renesas@...lbox.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: include/linux/compiler_types.h:597:38: error: call to
'__compiletime_assert_437' declared with attribute error: FIELD_PREP: value
too large for the field
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 2061f18ad76ecaddf8ed17df81b8611ea88dbddd
commit: 4f716a1db661cfb31502a0a6d7e62c06daf2e603 drm/rcar-du: dsi: Convert register bitfields to GENMASK() macro
date: 5 weeks ago
config: arc-randconfig-001-20251205 (https://download.01.org/0day-ci/archive/20251205/202512051834.bESvhDiG-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251205/202512051834.bESvhDiG-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512051834.bESvhDiG-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from <command-line>:
drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c: In function 'rcar_mipi_dsi_startup.isra.4':
>> include/linux/compiler_types.h:597:38: error: call to '__compiletime_assert_437' declared with attribute error: FIELD_PREP: value too large for the field
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:578:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler_types.h:597:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:68:3: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(__builtin_constant_p(_val) ? \
^~~~~~~~~~~~~~~~
include/linux/bitfield.h:115:3: note: in expansion of macro '__BF_FIELD_CHECK'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~
drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi_regs.h:259:29: note: in expansion of macro 'FIELD_PREP'
#define VCLKSET_DIV_V4H(n) FIELD_PREP(VCLKSET_DIV_V4H_MASK, (n))
^~~~~~~~~~
drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c:660:14: note: in expansion of macro 'VCLKSET_DIV_V4H'
vclkset |= VCLKSET_DIV_V4H(__ffs(setup_info.vclk_divider) - 1);
^~~~~~~~~~~~~~~
--
In file included from <command-line>:
rcar_mipi_dsi.c: In function 'rcar_mipi_dsi_startup.isra.4':
>> include/linux/compiler_types.h:597:38: error: call to '__compiletime_assert_437' declared with attribute error: FIELD_PREP: value too large for the field
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^
include/linux/compiler_types.h:578:4: note: in definition of macro '__compiletime_assert'
prefix ## suffix(); \
^~~~~~
include/linux/compiler_types.h:597:2: note: in expansion of macro '_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
include/linux/bitfield.h:68:3: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(__builtin_constant_p(_val) ? \
^~~~~~~~~~~~~~~~
include/linux/bitfield.h:115:3: note: in expansion of macro '__BF_FIELD_CHECK'
__BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \
^~~~~~~~~~~~~~~~
rcar_mipi_dsi_regs.h:259:29: note: in expansion of macro 'FIELD_PREP'
#define VCLKSET_DIV_V4H(n) FIELD_PREP(VCLKSET_DIV_V4H_MASK, (n))
^~~~~~~~~~
rcar_mipi_dsi.c:660:14: note: in expansion of macro 'VCLKSET_DIV_V4H'
vclkset |= VCLKSET_DIV_V4H(__ffs(setup_info.vclk_divider) - 1);
^~~~~~~~~~~~~~~
vim +/__compiletime_assert_437 +597 include/linux/compiler_types.h
eb5c2d4b45e3d2 Will Deacon 2020-07-21 583
eb5c2d4b45e3d2 Will Deacon 2020-07-21 584 #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 585 __compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2 Will Deacon 2020-07-21 586
eb5c2d4b45e3d2 Will Deacon 2020-07-21 587 /**
eb5c2d4b45e3d2 Will Deacon 2020-07-21 588 * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21 589 * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2 Will Deacon 2020-07-21 590 * @msg: a message to emit if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21 591 *
eb5c2d4b45e3d2 Will Deacon 2020-07-21 592 * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21 593 * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21 594 * compiler has support to do so.
eb5c2d4b45e3d2 Will Deacon 2020-07-21 595 */
eb5c2d4b45e3d2 Will Deacon 2020-07-21 596 #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 @597 _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2 Will Deacon 2020-07-21 598
:::::: The code at line 597 was first introduced by commit
:::::: eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5 compiler.h: Move compiletime_assert() macros into compiler_types.h
:::::: TO: Will Deacon <will@...nel.org>
:::::: CC: Will Deacon <will@...nel.org>
--
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https://github.com/intel/lkp-tests/wiki
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