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Message-ID: <202211282344.F9DkPZvn-lkp@intel.com>
Date: Mon, 28 Nov 2022 23:27:35 +0800
From: kernel test robot <lkp@...el.com>
To: Rikard Falkeborn <rikard.falkeborn@...il.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
Linux Memory Management List <linux-mm@...ck.org>,
Masahiro Yamada <yamada.masahiro@...ionext.com>,
Kees Cook <keescook@...omium.org>
Subject: include/linux/bits.h:25:28: error: first argument to
'__builtin_choose_expr' not a constant
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: b7b275e60bcd5f89771e865a8239325f86d9927d
commit: 295bcca84916cb5079140a89fccb472bb8d1f6e2 linux/bits.h: add compile time sanity check of GENMASK inputs
date: 2 years, 8 months ago
config: s390-randconfig-r035-20221128
compiler: s390-linux-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=295bcca84916cb5079140a89fccb472bb8d1f6e2
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 295bcca84916cb5079140a89fccb472bb8d1f6e2
# 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=s390 SHELL=/bin/bash drivers/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
drivers/mux/mmio.c: In function 'mux_mmio_probe':
drivers/mux/mmio.c:76:34: error: storage size of 'field' isn't known
76 | struct reg_field field;
| ^~~~~
In file included from include/linux/bits.h:23,
from include/linux/bitops.h:5,
from drivers/mux/mmio.c:8:
>> include/linux/bits.h:25:28: error: first argument to '__builtin_choose_expr' not a constant
25 | (BUILD_BUG_ON_ZERO(__builtin_choose_expr( \
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO'
16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
| ^
include/linux/bits.h:39:10: note: in expansion of macro 'GENMASK_INPUT_CHECK'
39 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
| ^~~~~~~~~~~~~~~~~~~
drivers/mux/mmio.c:96:29: note: in expansion of macro 'GENMASK'
96 | if (mask != GENMASK(field.msb, field.lsb)) {
| ^~~~~~~
include/linux/build_bug.h:16:51: error: bit-field '<anonymous>' width not an integer constant
16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
| ^
include/linux/bits.h:25:10: note: in expansion of macro 'BUILD_BUG_ON_ZERO'
25 | (BUILD_BUG_ON_ZERO(__builtin_choose_expr( \
| ^~~~~~~~~~~~~~~~~
include/linux/bits.h:39:10: note: in expansion of macro 'GENMASK_INPUT_CHECK'
39 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
| ^~~~~~~~~~~~~~~~~~~
drivers/mux/mmio.c:96:29: note: in expansion of macro 'GENMASK'
96 | if (mask != GENMASK(field.msb, field.lsb)) {
| ^~~~~~~
drivers/mux/mmio.c:102:29: error: implicit declaration of function 'devm_regmap_field_alloc' [-Werror=implicit-function-declaration]
102 | fields[i] = devm_regmap_field_alloc(dev, regmap, field);
| ^~~~~~~~~~~~~~~~~~~~~~~
drivers/mux/mmio.c:76:34: warning: unused variable 'field' [-Wunused-variable]
76 | struct reg_field field;
| ^~~~~
cc1: some warnings being treated as errors
vim +/__builtin_choose_expr +25 include/linux/bits.h
15
16 /*
17 * Create a contiguous bitmask starting at bit position @l and ending at
18 * position @h. For example
19 * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000.
20 */
21 #if !defined(__ASSEMBLY__) && \
22 (!defined(CONFIG_CC_IS_GCC) || CONFIG_GCC_VERSION >= 49000)
23 #include <linux/build_bug.h>
24 #define GENMASK_INPUT_CHECK(h, l) \
> 25 (BUILD_BUG_ON_ZERO(__builtin_choose_expr( \
26 __builtin_constant_p((l) > (h)), (l) > (h), 0)))
27 #else
28 /*
29 * BUILD_BUG_ON_ZERO is not available in h files included from asm files,
30 * disable the input check if that is the case.
31 */
32 #define GENMASK_INPUT_CHECK(h, l) 0
33 #endif
34
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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