From: Naresh Kamboju <naresh.kamboju@linaro.org>
To: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
"open list:KERNEL SELFTEST FRAMEWORK"
<linux-kselftest@vger.kernel.org>,
lkft-triage@lists.linaro.org,
Linux Regressions <regressions@lists.linux.dev>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Ben Copeland <benjamin.copeland@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
Dan Carpenter <dan.carpenter@linaro.org>,
Anders Roxell <anders.roxell@linaro.org>
Subject: next-20251027: backlight.c:59:39: error: implicit declaration of function 'of_find_node_by_name'; did you mean 'bus_find_device_by_name'?
Date: Mon, 27 Oct 2025 13:43:37 +0530 [thread overview]
Message-ID: <CA+G9fYs8fn5URQx2+s2oNxdUgZkSrdLC0P1tNBW_n-6BaBkK2Q@mail.gmail.com> (raw)
The following powerpc ppc6xx_defconfig build regressions noticed on the
Linux next-20251027 tag with gcc-14 and gcc-8.
* powerpc, build
- gcc-14-ppc6xx_defconfig
- gcc-8-ppc6xx_defconfig
First seen on next-20251027
Good: next-20251024
Bad: next-20251027
Regression Analysis:
- New regression? yes
- Reproducibility? yes
Build regression: next-20251027: backlight.c:59:39: error: implicit
declaration of function 'of_find_node_by_name'; did you mean
'bus_find_device_by_name'?
Build regression: next-20251027: include/linux/math.h:167:43: error:
first argument to '__builtin_choose_expr' not a constant
Build regression: next-20251027: via-pmu-backlight.c:22:20: error:
'FB_BACKLIGHT_LEVELS' undeclared here (not in a function)
Build regression: next-20251027: minmax.h:71:17: error: first argument
to '__builtin_choose_expr' not a constant
Build regression: next-20251027: compiler.h:168:17: error:
'__UNIQUE_ID_x__286' undeclared (first use in this function); did you
mean '__UNIQUE_ID_y__287'?
Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
## Build error
arch/powerpc/platforms/powermac/backlight.c: In function
'pmac_has_backlight_type':
arch/powerpc/platforms/powermac/backlight.c:59:39: error: implicit
declaration of function 'of_find_node_by_name'; did you mean
'bus_find_device_by_name'? [-Wimplicit-function-declaration]
59 | struct device_node* bk_node =
of_find_node_by_name(NULL, "backlight");
| ^~~~~~~~~~~~~~~~~~~~
| bus_find_device_by_name
arch/powerpc/platforms/powermac/backlight.c:59:39: error:
initialization of 'struct device_node *' from 'int' makes pointer from
integer without a cast [-Wint-conversion]
arch/powerpc/platforms/powermac/backlight.c:60:17: error: implicit
declaration of function 'of_property_match_string'
[-Wimplicit-function-declaration]
60 | int i = of_property_match_string(bk_node,
"backlight-control", type);
| ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/platforms/powermac/backlight.c:62:9: error: implicit
declaration of function 'of_node_put'
[-Wimplicit-function-declaration]
62 | of_node_put(bk_node);
| ^~~~~~~~~~~
drivers/macintosh/via-pmu-backlight.c:22:20: error:
'FB_BACKLIGHT_LEVELS' undeclared here (not in a function)
22 | static u8 bl_curve[FB_BACKLIGHT_LEVELS];
| ^~~~~~~~~~~~~~~~~~~
In file included from <command-line>:
drivers/macintosh/via-pmu-backlight.c: In function 'pmu_backlight_curve_lookup':
include/linux/compiler.h:168:17: error: '__UNIQUE_ID_x__286'
undeclared (first use in this function); did you mean
'__UNIQUE_ID_y__287'?
168 | __PASTE(__UNIQUE_ID_, \
| ^~~~~~~~~~~~
drivers/macintosh/via-pmu-backlight.c:45:23: note: in expansion of macro 'max'
45 | max = max((int)bl_curve[i], max);
| ^~~
include/linux/minmax.h:71:17: error: first argument to
'__builtin_choose_expr' not a constant
71 | (typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL,
1L)))(ux) >= 0)
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:577:23: note: in definition of macro
'__compiletime_assert'
577 | if (!(condition))
\
| ^~~~~~~~~
drivers/macintosh/via-pmu-backlight.c:45:23: note: in expansion of macro 'max'
45 | max = max((int)bl_curve[i], max);
| ^~~
include/linux/minmax.h:71:17: error: first argument to
'__builtin_choose_expr' not a constant
71 | (typeof(__builtin_choose_expr(sizeof(ux) > 4, 1LL,
1L)))(ux) >= 0)
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/compiler_types.h:577:23: note: in definition of macro
'__compiletime_assert'
577 | if (!(condition))
\
| ^~~~~~~~~
include/linux/minmax.h:112:25: note: in expansion of macro '__careful_cmp'
112 | #define max(x, y) __careful_cmp(max, x, y)
| ^~~~~~~~~~~~~
drivers/macintosh/via-pmu-backlight.c:45:23: note: in expansion of macro 'max'
45 | max = max((int)bl_curve[i], max);
| ^~~
In file included from include/linux/kernel.h:27,
from arch/powerpc/include/asm/page.h:11,
from arch/powerpc/include/asm/thread_info.h:13,
from include/linux/thread_info.h:60,
from arch/powerpc/include/asm/ptrace.h:342,
from drivers/macintosh/via-pmu-backlight.c:11:
include/linux/math.h:162:17: error: first argument to
'__builtin_choose_expr' not a constant
162 | __builtin_choose_expr(
\
| ^~~~~~~~~~~~~~~~~~~~~
drivers/macintosh/via-pmu-backlight.c: In function
'pmu_backlight_get_level_brightness':
drivers/macintosh/via-pmu-backlight.c:63:38: error: 'FB_BACKLIGHT_MAX'
undeclared (first use in this function); did you mean 'BACKLIGHT_RAW'?
63 | pmulevel = bl_curve[level] * FB_BACKLIGHT_MAX / MAX_PMU_LEVEL;
| ^~~~~~~~~~~~~~~~
| BACKLIGHT_RAW
drivers/macintosh/via-pmu-backlight.c:58:51: warning: parameter
'level' set but not used [-Wunused-but-set-parameter]
58 | static int pmu_backlight_get_level_brightness(int level)
| ~~~~^~~~~
drivers/macintosh/via-pmu-backlight.c: In function 'pmu_backlight_init':
drivers/macintosh/via-pmu-backlight.c:144:17: error: implicit
declaration of function 'of_machine_is_compatible'
[-Wimplicit-function-declaration]
144 | of_machine_is_compatible("AAPL,3400/2400") ||
| ^~~~~~~~~~~~~~~~~~~~~~~~
drivers/macintosh/via-pmu-backlight.c: At top level:
drivers/macintosh/via-pmu-backlight.c:22:11: warning: 'bl_curve'
defined but not used [-Wunused-variable]
22 | static u8 bl_curve[FB_BACKLIGHT_LEVELS];
| ^~~~~~~~
make[5]: *** [scripts/Makefile.build:287:
drivers/macintosh/via-pmu-backlight.o] Error 1
make[5]: Target 'drivers/macintosh/' not remade because of errors.
## Source
* Kernel version: 6.18.0-rc2-next-20251027
* Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git
* Git describe: next-20251027
* Git commit: 8fec172c82c2b5f6f8e47ab837c1dc91ee3d1b87
* Architectures: powerpc
* Toolchains: gcc-14
* Kconfigs: defconfig
## Build
* Test log: https://storage.tuxsuite.com/public/linaro/lkft/builds/34dKrlb77LGOQQSoC8FHCiIEAZK/build.log
* Test details:
https://regressions.linaro.org/lkft/linux-next-master/next-20251027/build/gcc-14-ppc6xx_defconfig/
* Build plan: https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/builds/34dKrlb77LGOQQSoC8FHCiIEAZK
* Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/34dKrlb77LGOQQSoC8FHCiIEAZK/
* Kernel config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/34dKrlb77LGOQQSoC8FHCiIEAZK/config
--
Linaro LKFT
next reply other threads:[~2025-10-27 8:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-27 8:13 Naresh Kamboju [this message]
2025-10-27 8:38 ` next-20251027: backlight.c:59:39: error: implicit declaration of function 'of_find_node_by_name'; did you mean 'bus_find_device_by_name'? Naresh Kamboju
2025-10-27 14:08 ` Thomas Zimmermann
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