tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git clkdev head: 3c150d2578b204c2e18c7ac6d967b43a614befbe commit: b82125f4dd714ff85c00fdf585722f02a6929ade [4/5] clkdev: remove CONFIG_CLKDEV_LOOKUP config: powerpc-randconfig-r016-20210531 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project bc6799f2f79f0ae87e9f1ebf9d25ba799fbd25a9) 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 # install powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git/commit/?id=b82125f4dd714ff85c00fdf585722f02a6929ade git remote add asm-generic https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git git fetch --no-tags asm-generic clkdev git checkout b82125f4dd714ff85c00fdf585722f02a6929ade # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from drivers/clk/clk.c:9: In file included from include/linux/clk.h:13: In file included from include/linux/kernel.h:12: In file included from include/linux/bitops.h:32: In file included from arch/powerpc/include/asm/bitops.h:62: arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined] #define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory") ^ <built-in>:308:9: note: previous definition is here #define __lwsync __builtin_ppc_lwsync ^ >> drivers/clk/clk.c:723:6: error: redefinition of 'clk_rate_exclusive_put' void clk_rate_exclusive_put(struct clk *clk) ^ include/linux/clk.h:861:20: note: previous definition is here static inline void clk_rate_exclusive_put(struct clk *clk) {} ^ >> drivers/clk/clk.c:789:5: error: redefinition of 'clk_rate_exclusive_get' int clk_rate_exclusive_get(struct clk *clk) ^ include/linux/clk.h:856:19: note: previous definition is here static inline int clk_rate_exclusive_get(struct clk *clk) ^ >> drivers/clk/clk.c:993:6: error: redefinition of 'clk_disable' void clk_disable(struct clk *clk) ^ include/linux/clk.h:874:20: note: previous definition is here static inline void clk_disable(struct clk *clk) {} ^ >> drivers/clk/clk.c:1106:5: error: redefinition of 'clk_save_context' int clk_save_context(void) ^ include/linux/clk.h:936:19: note: previous definition is here static inline int clk_save_context(void) ^ >> drivers/clk/clk.c:1133:6: error: redefinition of 'clk_restore_context' void clk_restore_context(void) ^ include/linux/clk.h:941:20: note: previous definition is here static inline void clk_restore_context(void) {} ^ >> drivers/clk/clk.c:1158:5: error: redefinition of 'clk_enable' int clk_enable(struct clk *clk) ^ include/linux/clk.h:863:19: note: previous definition is here static inline int clk_enable(struct clk *clk) ^ >> drivers/clk/clk.c:1458:6: error: redefinition of 'clk_round_rate' long clk_round_rate(struct clk *clk, unsigned long rate) ^ include/linux/clk.h:895:20: note: previous definition is here static inline long clk_round_rate(struct clk *clk, unsigned long rate) ^ >> drivers/clk/clk.c:1652:15: error: redefinition of 'clk_get_rate' unsigned long clk_get_rate(struct clk *clk) ^ include/linux/clk.h:880:29: note: previous definition is here static inline unsigned long clk_get_rate(struct clk *clk) ^ >> drivers/clk/clk.c:2243:5: error: redefinition of 'clk_set_rate' int clk_set_rate(struct clk *clk, unsigned long rate) ^ include/linux/clk.h:885:19: note: previous definition is here static inline int clk_set_rate(struct clk *clk, unsigned long rate) ^ >> drivers/clk/clk.c:2286:5: error: redefinition of 'clk_set_rate_exclusive' int clk_set_rate_exclusive(struct clk *clk, unsigned long rate) ^ include/linux/clk.h:890:19: note: previous definition is here static inline int clk_set_rate_exclusive(struct clk *clk, unsigned long rate) ^ >> drivers/clk/clk.c:2322:5: error: redefinition of 'clk_set_rate_range' int clk_set_rate_range(struct clk *clk, unsigned long min, unsigned long max) ^ include/linux/clk.h:905:19: note: previous definition is here static inline int clk_set_rate_range(struct clk *clk, unsigned long min, ^ >> drivers/clk/clk.c:2394:5: error: redefinition of 'clk_set_min_rate' int clk_set_min_rate(struct clk *clk, unsigned long rate) ^ include/linux/clk.h:911:19: note: previous definition is here static inline int clk_set_min_rate(struct clk *clk, unsigned long rate) ^ >> drivers/clk/clk.c:2412:5: error: redefinition of 'clk_set_max_rate' int clk_set_max_rate(struct clk *clk, unsigned long rate) ^ include/linux/clk.h:916:19: note: previous definition is here static inline int clk_set_max_rate(struct clk *clk, unsigned long rate) ^ >> drivers/clk/clk.c:2429:13: error: redefinition of 'clk_get_parent' struct clk *clk_get_parent(struct clk *clk) ^ include/linux/clk.h:926:27: note: previous definition is here static inline struct clk *clk_get_parent(struct clk *clk) ^ >> drivers/clk/clk.c:2481:6: error: redefinition of 'clk_has_parent' bool clk_has_parent(struct clk *clk, struct clk *parent) ^ include/linux/clk.h:900:20: note: previous definition is here static inline bool clk_has_parent(struct clk *clk, struct clk *parent) ^ >> drivers/clk/clk.c:2593:5: error: redefinition of 'clk_set_parent' int clk_set_parent(struct clk *clk, struct clk *parent) ^ include/linux/clk.h:921:19: note: previous definition is here static inline int clk_set_parent(struct clk *clk, struct clk *parent) ^ 1 warning and 16 errors generated. vim +/clk_rate_exclusive_put +723 drivers/clk/clk.c e55a839a7a1c56 Jerome Brunet 2017-12-01 704 55e9b8b7b806ec Jerome Brunet 2017-12-01 705 /** 55e9b8b7b806ec Jerome Brunet 2017-12-01 706 * clk_rate_exclusive_put - release exclusivity over clock rate control 55e9b8b7b806ec Jerome Brunet 2017-12-01 707 * @clk: the clk over which the exclusivity is released 55e9b8b7b806ec Jerome Brunet 2017-12-01 708 * 55e9b8b7b806ec Jerome Brunet 2017-12-01 709 * clk_rate_exclusive_put() completes a critical section during which a clock 55e9b8b7b806ec Jerome Brunet 2017-12-01 710 * consumer cannot tolerate any other consumer making any operation on the 55e9b8b7b806ec Jerome Brunet 2017-12-01 711 * clock which could result in a rate change or rate glitch. Exclusive clocks 55e9b8b7b806ec Jerome Brunet 2017-12-01 712 * cannot have their rate changed, either directly or indirectly due to changes 55e9b8b7b806ec Jerome Brunet 2017-12-01 713 * further up the parent chain of clocks. As a result, clocks up parent chain 55e9b8b7b806ec Jerome Brunet 2017-12-01 714 * also get under exclusive control of the calling consumer. 55e9b8b7b806ec Jerome Brunet 2017-12-01 715 * 55e9b8b7b806ec Jerome Brunet 2017-12-01 716 * If exlusivity is claimed more than once on clock, even by the same consumer, 55e9b8b7b806ec Jerome Brunet 2017-12-01 717 * the rate effectively gets locked as exclusivity can't be preempted. 55e9b8b7b806ec Jerome Brunet 2017-12-01 718 * 55e9b8b7b806ec Jerome Brunet 2017-12-01 719 * Calls to clk_rate_exclusive_put() must be balanced with calls to 55e9b8b7b806ec Jerome Brunet 2017-12-01 720 * clk_rate_exclusive_get(). Calls to this function may sleep, and do not return 55e9b8b7b806ec Jerome Brunet 2017-12-01 721 * error status. 55e9b8b7b806ec Jerome Brunet 2017-12-01 722 */ 55e9b8b7b806ec Jerome Brunet 2017-12-01 @723 void clk_rate_exclusive_put(struct clk *clk) 55e9b8b7b806ec Jerome Brunet 2017-12-01 724 { 55e9b8b7b806ec Jerome Brunet 2017-12-01 725 if (!clk) 55e9b8b7b806ec Jerome Brunet 2017-12-01 726 return; 55e9b8b7b806ec Jerome Brunet 2017-12-01 727 55e9b8b7b806ec Jerome Brunet 2017-12-01 728 clk_prepare_lock(); 55e9b8b7b806ec Jerome Brunet 2017-12-01 729 55e9b8b7b806ec Jerome Brunet 2017-12-01 730 /* 55e9b8b7b806ec Jerome Brunet 2017-12-01 731 * if there is something wrong with this consumer protect count, stop 55e9b8b7b806ec Jerome Brunet 2017-12-01 732 * here before messing with the provider 55e9b8b7b806ec Jerome Brunet 2017-12-01 733 */ 55e9b8b7b806ec Jerome Brunet 2017-12-01 734 if (WARN_ON(clk->exclusive_count <= 0)) 55e9b8b7b806ec Jerome Brunet 2017-12-01 735 goto out; 55e9b8b7b806ec Jerome Brunet 2017-12-01 736 55e9b8b7b806ec Jerome Brunet 2017-12-01 737 clk_core_rate_unprotect(clk->core); 55e9b8b7b806ec Jerome Brunet 2017-12-01 738 clk->exclusive_count--; 55e9b8b7b806ec Jerome Brunet 2017-12-01 739 out: 55e9b8b7b806ec Jerome Brunet 2017-12-01 740 clk_prepare_unlock(); 55e9b8b7b806ec Jerome Brunet 2017-12-01 741 } 55e9b8b7b806ec Jerome Brunet 2017-12-01 742 EXPORT_SYMBOL_GPL(clk_rate_exclusive_put); 55e9b8b7b806ec Jerome Brunet 2017-12-01 743 e55a839a7a1c56 Jerome Brunet 2017-12-01 744 static void clk_core_rate_protect(struct clk_core *core) e55a839a7a1c56 Jerome Brunet 2017-12-01 745 { e55a839a7a1c56 Jerome Brunet 2017-12-01 746 lockdep_assert_held(&prepare_lock); e55a839a7a1c56 Jerome Brunet 2017-12-01 747 e55a839a7a1c56 Jerome Brunet 2017-12-01 748 if (!core) e55a839a7a1c56 Jerome Brunet 2017-12-01 749 return; e55a839a7a1c56 Jerome Brunet 2017-12-01 750 e55a839a7a1c56 Jerome Brunet 2017-12-01 751 if (core->protect_count == 0) e55a839a7a1c56 Jerome Brunet 2017-12-01 752 clk_core_rate_protect(core->parent); e55a839a7a1c56 Jerome Brunet 2017-12-01 753 e55a839a7a1c56 Jerome Brunet 2017-12-01 754 core->protect_count++; e55a839a7a1c56 Jerome Brunet 2017-12-01 755 } e55a839a7a1c56 Jerome Brunet 2017-12-01 756 e55a839a7a1c56 Jerome Brunet 2017-12-01 757 static void clk_core_rate_restore_protect(struct clk_core *core, int count) e55a839a7a1c56 Jerome Brunet 2017-12-01 758 { e55a839a7a1c56 Jerome Brunet 2017-12-01 759 lockdep_assert_held(&prepare_lock); e55a839a7a1c56 Jerome Brunet 2017-12-01 760 e55a839a7a1c56 Jerome Brunet 2017-12-01 761 if (!core) e55a839a7a1c56 Jerome Brunet 2017-12-01 762 return; e55a839a7a1c56 Jerome Brunet 2017-12-01 763 e55a839a7a1c56 Jerome Brunet 2017-12-01 764 if (count == 0) e55a839a7a1c56 Jerome Brunet 2017-12-01 765 return; e55a839a7a1c56 Jerome Brunet 2017-12-01 766 e55a839a7a1c56 Jerome Brunet 2017-12-01 767 clk_core_rate_protect(core); e55a839a7a1c56 Jerome Brunet 2017-12-01 768 core->protect_count = count; e55a839a7a1c56 Jerome Brunet 2017-12-01 769 } e55a839a7a1c56 Jerome Brunet 2017-12-01 770 55e9b8b7b806ec Jerome Brunet 2017-12-01 771 /** 55e9b8b7b806ec Jerome Brunet 2017-12-01 772 * clk_rate_exclusive_get - get exclusivity over the clk rate control 55e9b8b7b806ec Jerome Brunet 2017-12-01 773 * @clk: the clk over which the exclusity of rate control is requested 55e9b8b7b806ec Jerome Brunet 2017-12-01 774 * a37a5a9d715f0d Andy Shevchenko 2020-03-10 775 * clk_rate_exclusive_get() begins a critical section during which a clock 55e9b8b7b806ec Jerome Brunet 2017-12-01 776 * consumer cannot tolerate any other consumer making any operation on the 55e9b8b7b806ec Jerome Brunet 2017-12-01 777 * clock which could result in a rate change or rate glitch. Exclusive clocks 55e9b8b7b806ec Jerome Brunet 2017-12-01 778 * cannot have their rate changed, either directly or indirectly due to changes 55e9b8b7b806ec Jerome Brunet 2017-12-01 779 * further up the parent chain of clocks. As a result, clocks up parent chain 55e9b8b7b806ec Jerome Brunet 2017-12-01 780 * also get under exclusive control of the calling consumer. 55e9b8b7b806ec Jerome Brunet 2017-12-01 781 * 55e9b8b7b806ec Jerome Brunet 2017-12-01 782 * If exlusivity is claimed more than once on clock, even by the same consumer, 55e9b8b7b806ec Jerome Brunet 2017-12-01 783 * the rate effectively gets locked as exclusivity can't be preempted. 55e9b8b7b806ec Jerome Brunet 2017-12-01 784 * 55e9b8b7b806ec Jerome Brunet 2017-12-01 785 * Calls to clk_rate_exclusive_get() should be balanced with calls to 55e9b8b7b806ec Jerome Brunet 2017-12-01 786 * clk_rate_exclusive_put(). Calls to this function may sleep. 55e9b8b7b806ec Jerome Brunet 2017-12-01 787 * Returns 0 on success, -EERROR otherwise 55e9b8b7b806ec Jerome Brunet 2017-12-01 788 */ 55e9b8b7b806ec Jerome Brunet 2017-12-01 @789 int clk_rate_exclusive_get(struct clk *clk) 55e9b8b7b806ec Jerome Brunet 2017-12-01 790 { 55e9b8b7b806ec Jerome Brunet 2017-12-01 791 if (!clk) 55e9b8b7b806ec Jerome Brunet 2017-12-01 792 return 0; 55e9b8b7b806ec Jerome Brunet 2017-12-01 793 55e9b8b7b806ec Jerome Brunet 2017-12-01 794 clk_prepare_lock(); 55e9b8b7b806ec Jerome Brunet 2017-12-01 795 clk_core_rate_protect(clk->core); 55e9b8b7b806ec Jerome Brunet 2017-12-01 796 clk->exclusive_count++; 55e9b8b7b806ec Jerome Brunet 2017-12-01 797 clk_prepare_unlock(); 55e9b8b7b806ec Jerome Brunet 2017-12-01 798 55e9b8b7b806ec Jerome Brunet 2017-12-01 799 return 0; 55e9b8b7b806ec Jerome Brunet 2017-12-01 800 } 55e9b8b7b806ec Jerome Brunet 2017-12-01 801 EXPORT_SYMBOL_GPL(clk_rate_exclusive_get); 55e9b8b7b806ec Jerome Brunet 2017-12-01 802 :::::: The code at line 723 was first introduced by commit :::::: 55e9b8b7b806ec3f9a8817e13596682a5981c19c clk: add clk_rate_exclusive api :::::: TO: Jerome Brunet <jbrunet@xxxxxxxxxxxx> :::::: CC: Michael Turquette <mturquette@xxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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