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SubjectRe: [PATCH 2/2] watchdog: Add Realtek Otto watchdog timer
Hi Sander,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.15-rc5 next-20211013]
[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]

url: https://github.com/0day-ci/linux/commits/Sander-Vanheule/Add-Realtek-Otto-WDT-support/20211013-213511
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f4d0cc426f77df6890aa868f96c2de89686aae8a
config: sh-allmodconfig (attached as .config)
compiler: sh4-linux-gcc (GCC) 11.2.0
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://github.com/0day-ci/linux/commit/32b957f54703ffbffecc825fb8df3106b2aab6b5
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Sander-Vanheule/Add-Realtek-Otto-WDT-support/20211013-213511
git checkout 32b957f54703ffbffecc825fb8df3106b2aab6b5
# save the attached .config to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=sh SHELL=/bin/bash drivers/

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

All errors (new ones prefixed by >>):

>> drivers/clk/clk.c:855:6: error: redefinition of 'clk_unprepare'
855 | void clk_unprepare(struct clk *clk)
| ^~~~~~~~~~~~~
In file included from drivers/clk/clk.c:9:
include/linux/clk.h:303:20: note: previous definition of 'clk_unprepare' with type 'void(struct clk *)'
303 | static inline void clk_unprepare(struct clk *clk)
| ^~~~~~~~~~~~~
>> drivers/clk/clk.c:936:5: error: redefinition of 'clk_prepare'
936 | int clk_prepare(struct clk *clk)
| ^~~~~~~~~~~
In file included from drivers/clk/clk.c:9:
include/linux/clk.h:271:19: note: previous definition of 'clk_prepare' with type 'int(struct clk *)'
271 | static inline int clk_prepare(struct clk *clk)
| ^~~~~~~~~~~
>> drivers/clk/clk.c:1182:6: error: redefinition of 'clk_is_enabled_when_prepared'
1182 | bool clk_is_enabled_when_prepared(struct clk *clk)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/clk/clk.c:9:
include/linux/clk.h:284:20: note: previous definition of 'clk_is_enabled_when_prepared' with type 'bool(struct clk *)' {aka '_Bool(struct clk *)'}
284 | static inline bool clk_is_enabled_when_prepared(struct clk *clk)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for COMMON_CLK
Depends on !HAVE_LEGACY_CLK
Selected by
- REALTEK_OTTO_WDT && WATCHDOG && (MACH_REALTEK_RTL || COMPILE_TEST


vim +/clk_unprepare +855 drivers/clk/clk.c

a6adc30ba7bef8 Dong Aisheng 2016-06-30 843
4dff95dc9477a3 Stephen Boyd 2015-04-30 844 /**
4dff95dc9477a3 Stephen Boyd 2015-04-30 845 * clk_unprepare - undo preparation of a clock source
4dff95dc9477a3 Stephen Boyd 2015-04-30 846 * @clk: the clk being unprepared
4dff95dc9477a3 Stephen Boyd 2015-04-30 847 *
4dff95dc9477a3 Stephen Boyd 2015-04-30 848 * clk_unprepare may sleep, which differentiates it from clk_disable. In a
4dff95dc9477a3 Stephen Boyd 2015-04-30 849 * simple case, clk_unprepare can be used instead of clk_disable to gate a clk
4dff95dc9477a3 Stephen Boyd 2015-04-30 850 * if the operation may sleep. One example is a clk which is accessed over
4dff95dc9477a3 Stephen Boyd 2015-04-30 851 * I2c. In the complex case a clk gate operation may require a fast and a slow
4dff95dc9477a3 Stephen Boyd 2015-04-30 852 * part. It is this reason that clk_unprepare and clk_disable are not mutually
4dff95dc9477a3 Stephen Boyd 2015-04-30 853 * exclusive. In fact clk_disable must be called before clk_unprepare.
4dff95dc9477a3 Stephen Boyd 2015-04-30 854 */
4dff95dc9477a3 Stephen Boyd 2015-04-30 @855 void clk_unprepare(struct clk *clk)
b2476490ef1113 Mike Turquette 2012-03-15 856 {
4dff95dc9477a3 Stephen Boyd 2015-04-30 857 if (IS_ERR_OR_NULL(clk))
4dff95dc9477a3 Stephen Boyd 2015-04-30 858 return;
b2476490ef1113 Mike Turquette 2012-03-15 859
a6adc30ba7bef8 Dong Aisheng 2016-06-30 860 clk_core_unprepare_lock(clk->core);
1e435256d625c2 Olof Johansson 2013-04-27 861 }
4dff95dc9477a3 Stephen Boyd 2015-04-30 862 EXPORT_SYMBOL_GPL(clk_unprepare);
1e435256d625c2 Olof Johansson 2013-04-27 863
4dff95dc9477a3 Stephen Boyd 2015-04-30 864 static int clk_core_prepare(struct clk_core *core)
4dff95dc9477a3 Stephen Boyd 2015-04-30 865 {
4dff95dc9477a3 Stephen Boyd 2015-04-30 866 int ret = 0;
b2476490ef1113 Mike Turquette 2012-03-15 867
a63347251907d7 Stephen Boyd 2015-05-06 868 lockdep_assert_held(&prepare_lock);
a63347251907d7 Stephen Boyd 2015-05-06 869
4dff95dc9477a3 Stephen Boyd 2015-04-30 870 if (!core)
4dff95dc9477a3 Stephen Boyd 2015-04-30 871 return 0;
b2476490ef1113 Mike Turquette 2012-03-15 872
4dff95dc9477a3 Stephen Boyd 2015-04-30 873 if (core->prepare_count == 0) {
9a34b45397e5a3 Marek Szyprowski 2017-08-21 874 ret = clk_pm_runtime_get(core);
4dff95dc9477a3 Stephen Boyd 2015-04-30 875 if (ret)
4dff95dc9477a3 Stephen Boyd 2015-04-30 876 return ret;
b2476490ef1113 Mike Turquette 2012-03-15 877
9a34b45397e5a3 Marek Szyprowski 2017-08-21 878 ret = clk_core_prepare(core->parent);
9a34b45397e5a3 Marek Szyprowski 2017-08-21 879 if (ret)
9a34b45397e5a3 Marek Szyprowski 2017-08-21 880 goto runtime_put;
9a34b45397e5a3 Marek Szyprowski 2017-08-21 881
4dff95dc9477a3 Stephen Boyd 2015-04-30 882 trace_clk_prepare(core);
1c155b3dfe0835 Ulf Hansson 2013-03-12 883
4dff95dc9477a3 Stephen Boyd 2015-04-30 884 if (core->ops->prepare)
4dff95dc9477a3 Stephen Boyd 2015-04-30 885 ret = core->ops->prepare(core->hw);
1c155b3dfe0835 Ulf Hansson 2013-03-12 886
4dff95dc9477a3 Stephen Boyd 2015-04-30 887 trace_clk_prepare_complete(core);
b2476490ef1113 Mike Turquette 2012-03-15 888
9a34b45397e5a3 Marek Szyprowski 2017-08-21 889 if (ret)
9a34b45397e5a3 Marek Szyprowski 2017-08-21 890 goto unprepare;
b2476490ef1113 Mike Turquette 2012-03-15 891 }
b2476490ef1113 Mike Turquette 2012-03-15 892
4dff95dc9477a3 Stephen Boyd 2015-04-30 893 core->prepare_count++;
b2476490ef1113 Mike Turquette 2012-03-15 894
9461f7b33d11cb Jerome Brunet 2018-06-19 895 /*
9461f7b33d11cb Jerome Brunet 2018-06-19 896 * CLK_SET_RATE_GATE is a special case of clock protection
9461f7b33d11cb Jerome Brunet 2018-06-19 897 * Instead of a consumer claiming exclusive rate control, it is
9461f7b33d11cb Jerome Brunet 2018-06-19 898 * actually the provider which prevents any consumer from making any
9461f7b33d11cb Jerome Brunet 2018-06-19 899 * operation which could result in a rate change or rate glitch while
9461f7b33d11cb Jerome Brunet 2018-06-19 900 * the clock is prepared.
9461f7b33d11cb Jerome Brunet 2018-06-19 901 */
9461f7b33d11cb Jerome Brunet 2018-06-19 902 if (core->flags & CLK_SET_RATE_GATE)
9461f7b33d11cb Jerome Brunet 2018-06-19 903 clk_core_rate_protect(core);
9461f7b33d11cb Jerome Brunet 2018-06-19 904
4dff95dc9477a3 Stephen Boyd 2015-04-30 905 return 0;
9a34b45397e5a3 Marek Szyprowski 2017-08-21 906 unprepare:
9a34b45397e5a3 Marek Szyprowski 2017-08-21 907 clk_core_unprepare(core->parent);
9a34b45397e5a3 Marek Szyprowski 2017-08-21 908 runtime_put:
9a34b45397e5a3 Marek Szyprowski 2017-08-21 909 clk_pm_runtime_put(core);
9a34b45397e5a3 Marek Szyprowski 2017-08-21 910 return ret;
b2476490ef1113 Mike Turquette 2012-03-15 911 }
b2476490ef1113 Mike Turquette 2012-03-15 912
a6adc30ba7bef8 Dong Aisheng 2016-06-30 913 static int clk_core_prepare_lock(struct clk_core *core)
a6adc30ba7bef8 Dong Aisheng 2016-06-30 914 {
a6adc30ba7bef8 Dong Aisheng 2016-06-30 915 int ret;
a6adc30ba7bef8 Dong Aisheng 2016-06-30 916
a6adc30ba7bef8 Dong Aisheng 2016-06-30 917 clk_prepare_lock();
a6adc30ba7bef8 Dong Aisheng 2016-06-30 918 ret = clk_core_prepare(core);
a6adc30ba7bef8 Dong Aisheng 2016-06-30 919 clk_prepare_unlock();
a6adc30ba7bef8 Dong Aisheng 2016-06-30 920
a6adc30ba7bef8 Dong Aisheng 2016-06-30 921 return ret;
a6adc30ba7bef8 Dong Aisheng 2016-06-30 922 }
a6adc30ba7bef8 Dong Aisheng 2016-06-30 923
4dff95dc9477a3 Stephen Boyd 2015-04-30 924 /**
4dff95dc9477a3 Stephen Boyd 2015-04-30 925 * clk_prepare - prepare a clock source
4dff95dc9477a3 Stephen Boyd 2015-04-30 926 * @clk: the clk being prepared
4dff95dc9477a3 Stephen Boyd 2015-04-30 927 *
4dff95dc9477a3 Stephen Boyd 2015-04-30 928 * clk_prepare may sleep, which differentiates it from clk_enable. In a simple
4dff95dc9477a3 Stephen Boyd 2015-04-30 929 * case, clk_prepare can be used instead of clk_enable to ungate a clk if the
4dff95dc9477a3 Stephen Boyd 2015-04-30 930 * operation may sleep. One example is a clk which is accessed over I2c. In
4dff95dc9477a3 Stephen Boyd 2015-04-30 931 * the complex case a clk ungate operation may require a fast and a slow part.
4dff95dc9477a3 Stephen Boyd 2015-04-30 932 * It is this reason that clk_prepare and clk_enable are not mutually
4dff95dc9477a3 Stephen Boyd 2015-04-30 933 * exclusive. In fact clk_prepare must be called before clk_enable.
4dff95dc9477a3 Stephen Boyd 2015-04-30 934 * Returns 0 on success, -EERROR otherwise.
4dff95dc9477a3 Stephen Boyd 2015-04-30 935 */
4dff95dc9477a3 Stephen Boyd 2015-04-30 @936 int clk_prepare(struct clk *clk)
b2476490ef1113 Mike Turquette 2012-03-15 937 {
035a61c314eb3d Tomeu Vizoso 2015-01-23 938 if (!clk)
4dff95dc9477a3 Stephen Boyd 2015-04-30 939 return 0;
035a61c314eb3d Tomeu Vizoso 2015-01-23 940
a6adc30ba7bef8 Dong Aisheng 2016-06-30 941 return clk_core_prepare_lock(clk->core);
7ef3dcc8145263 James Hogan 2013-07-29 942 }
4dff95dc9477a3 Stephen Boyd 2015-04-30 943 EXPORT_SYMBOL_GPL(clk_prepare);
035a61c314eb3d Tomeu Vizoso 2015-01-23 944

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