Messages in this thread |  | | Date | Mon, 21 Mar 2022 10:31:54 +0800 | From | kernel test robot <> | Subject | [deller-parisc:for-next 23/24] include/linux/jump_label.h:266:16: error: implicit declaration of function 'atomic_read' |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux.git for-next head: 1cfef2c0a97afab6eef70fa0de60b1142ade482f commit: 9f4e39a3774932c740ed9f243c390eb59106e3f0 [23/24] parisc: Convert parisc_requires_coherency() to static branch config: parisc64-defconfig (https://download.01.org/0day-ci/archive/20220321/202203211035.CCy7NOx1-lkp@intel.com/config) compiler: hppa64-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://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux.git/commit/?id=9f4e39a3774932c740ed9f243c390eb59106e3f0 git remote add deller-parisc https://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux.git git fetch --no-tags deller-parisc for-next git checkout 9f4e39a3774932c740ed9f243c390eb59106e3f0 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=parisc64 prepare
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 >>):
In file included from arch/parisc/include/asm/processor.h:284, from arch/parisc/include/asm/spinlock.h:7, from arch/parisc/include/asm/atomic.h:22, from include/linux/atomic.h:7, from arch/parisc/include/asm/bitops.h:13, from include/linux/bitops.h:33, from include/linux/kernel.h:22, from arch/parisc/include/asm/bug.h:5, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/linux/jump_label.h: In function 'static_key_count': >> include/linux/jump_label.h:266:16: error: implicit declaration of function 'atomic_read' [-Werror=implicit-function-declaration] 266 | return atomic_read(&key->enabled); | ^~~~~~~~~~~ In file included from arch/parisc/include/asm/processor.h:284, from arch/parisc/include/asm/spinlock.h:7, from arch/parisc/include/asm/atomic.h:22, from include/linux/atomic.h:7, from arch/parisc/include/asm/bitops.h:13, from include/linux/bitops.h:33, from include/linux/kernel.h:22, from arch/parisc/include/asm/bug.h:5, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/linux/jump_label.h: In function 'static_key_slow_inc': >> include/linux/jump_label.h:81:35: error: implicit declaration of function 'WARN' [-Werror=implicit-function-declaration] 81 | #define STATIC_KEY_CHECK_USE(key) WARN(!static_key_initialized, \ | ^~~~ include/linux/jump_label.h:290:9: note: in expansion of macro 'STATIC_KEY_CHECK_USE' 290 | STATIC_KEY_CHECK_USE(key); | ^~~~~~~~~~~~~~~~~~~~ In file included from arch/parisc/include/asm/processor.h:284, from arch/parisc/include/asm/spinlock.h:7, from arch/parisc/include/asm/atomic.h:22, from include/linux/atomic.h:7, from arch/parisc/include/asm/bitops.h:13, from include/linux/bitops.h:33, from include/linux/kernel.h:22, from arch/parisc/include/asm/bug.h:5, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: >> include/linux/jump_label.h:291:9: error: implicit declaration of function 'atomic_inc' [-Werror=implicit-function-declaration] 291 | atomic_inc(&key->enabled); | ^~~~~~~~~~ include/linux/jump_label.h: In function 'static_key_slow_dec': >> include/linux/jump_label.h:297:9: error: implicit declaration of function 'atomic_dec' [-Werror=implicit-function-declaration] 297 | atomic_dec(&key->enabled); | ^~~~~~~~~~ include/linux/jump_label.h: In function 'static_key_enable': >> include/linux/jump_label.h:321:17: error: implicit declaration of function 'WARN_ON_ONCE' [-Werror=implicit-function-declaration] 321 | WARN_ON_ONCE(atomic_read(&key->enabled) != 1); | ^~~~~~~~~~~~ >> include/linux/jump_label.h:324:9: error: implicit declaration of function 'atomic_set' [-Werror=implicit-function-declaration] 324 | atomic_set(&key->enabled, 1); | ^~~~~~~~~~ In file included from include/linux/atomic.h:82, from arch/parisc/include/asm/bitops.h:13, from include/linux/bitops.h:33, from include/linux/kernel.h:22, from arch/parisc/include/asm/bug.h:5, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/linux/atomic/atomic-instrumented.h: At top level: >> include/linux/atomic/atomic-instrumented.h:25:1: error: static declaration of 'atomic_read' follows non-static declaration 25 | atomic_read(const atomic_t *v) | ^~~~~~~~~~~ In file included from arch/parisc/include/asm/processor.h:284, from arch/parisc/include/asm/spinlock.h:7, from arch/parisc/include/asm/atomic.h:22, from include/linux/atomic.h:7, from arch/parisc/include/asm/bitops.h:13, from include/linux/bitops.h:33, from include/linux/kernel.h:22, from arch/parisc/include/asm/bug.h:5, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/linux/jump_label.h:266:16: note: previous implicit declaration of 'atomic_read' with type 'int()' 266 | return atomic_read(&key->enabled); | ^~~~~~~~~~~ In file included from include/linux/atomic.h:82, from arch/parisc/include/asm/bitops.h:13, from include/linux/bitops.h:33, from include/linux/kernel.h:22, from arch/parisc/include/asm/bug.h:5, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/linux/atomic/atomic-instrumented.h:39:1: warning: conflicting types for 'atomic_set'; have 'void(atomic_t *, int)' 39 | atomic_set(atomic_t *v, int i) | ^~~~~~~~~~ >> include/linux/atomic/atomic-instrumented.h:39:1: error: static declaration of 'atomic_set' follows non-static declaration In file included from arch/parisc/include/asm/processor.h:284, from arch/parisc/include/asm/spinlock.h:7, from arch/parisc/include/asm/atomic.h:22, from include/linux/atomic.h:7, from arch/parisc/include/asm/bitops.h:13, from include/linux/bitops.h:33, from include/linux/kernel.h:22, from arch/parisc/include/asm/bug.h:5, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/linux/jump_label.h:324:9: note: previous implicit declaration of 'atomic_set' with type 'void(atomic_t *, int)' 324 | atomic_set(&key->enabled, 1); | ^~~~~~~~~~ In file included from include/linux/atomic.h:82, from arch/parisc/include/asm/bitops.h:13, from include/linux/bitops.h:33, from include/linux/kernel.h:22, from arch/parisc/include/asm/bug.h:5, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/linux/atomic/atomic-instrumented.h:188:1: warning: conflicting types for 'atomic_inc'; have 'void(atomic_t *)' 188 | atomic_inc(atomic_t *v) | ^~~~~~~~~~ >> include/linux/atomic/atomic-instrumented.h:188:1: error: static declaration of 'atomic_inc' follows non-static declaration In file included from arch/parisc/include/asm/processor.h:284, from arch/parisc/include/asm/spinlock.h:7, from arch/parisc/include/asm/atomic.h:22, from include/linux/atomic.h:7, from arch/parisc/include/asm/bitops.h:13, from include/linux/bitops.h:33, from include/linux/kernel.h:22, from arch/parisc/include/asm/bug.h:5, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/linux/jump_label.h:291:9: note: previous implicit declaration of 'atomic_inc' with type 'void(atomic_t *)' 291 | atomic_inc(&key->enabled); | ^~~~~~~~~~ In file included from include/linux/atomic.h:82, from arch/parisc/include/asm/bitops.h:13, from include/linux/bitops.h:33, from include/linux/kernel.h:22, from arch/parisc/include/asm/bug.h:5, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/linux/atomic/atomic-instrumented.h:255:1: warning: conflicting types for 'atomic_dec'; have 'void(atomic_t *)' 255 | atomic_dec(atomic_t *v) | ^~~~~~~~~~ >> include/linux/atomic/atomic-instrumented.h:255:1: error: static declaration of 'atomic_dec' follows non-static declaration In file included from arch/parisc/include/asm/processor.h:284, from arch/parisc/include/asm/spinlock.h:7, from arch/parisc/include/asm/atomic.h:22, from include/linux/atomic.h:7, from arch/parisc/include/asm/bitops.h:13, from include/linux/bitops.h:33, from include/linux/kernel.h:22, from arch/parisc/include/asm/bug.h:5, from include/linux/bug.h:5, from include/linux/page-flags.h:10, from kernel/bounds.c:10: include/linux/jump_label.h:297:9: note: previous implicit declaration of 'atomic_dec' with type 'void(atomic_t *)' 297 | atomic_dec(&key->enabled); | ^~~~~~~~~~ cc1: some warnings being treated as errors make[2]: *** [scripts/Makefile.build:121: kernel/bounds.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1191: prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:219: __sub-make] Error 2 make: Target 'prepare' not remade because of errors.
vim +/atomic_read +266 include/linux/jump_label.h
c4b2c0c5f647aa Hannes Frederic Sowa 2013-10-19 80 5cdda5117e125e Borislav Petkov 2017-10-18 @81 #define STATIC_KEY_CHECK_USE(key) WARN(!static_key_initialized, \ 5cdda5117e125e Borislav Petkov 2017-10-18 82 "%s(): static key '%pS' used before call to jump_label_init()", \ 5cdda5117e125e Borislav Petkov 2017-10-18 83 __func__, (key)) d430d3d7e646eb Jason Baron 2011-03-16 84 e9666d10a5677a Masahiro Yamada 2018-12-31 85 #ifdef CONFIG_JUMP_LABEL d430d3d7e646eb Jason Baron 2011-03-16 86 c5905afb0ee655 Ingo Molnar 2012-02-24 87 struct static_key { d430d3d7e646eb Jason Baron 2011-03-16 88 atomic_t enabled; 3821fd35b58dba Jason Baron 2017-02-03 89 /* b17ef2ed624aa7 Steven Rostedt (VMware 2017-03-02 90) * Note: b17ef2ed624aa7 Steven Rostedt (VMware 2017-03-02 91) * To make anonymous unions work with old compilers, the static b17ef2ed624aa7 Steven Rostedt (VMware 2017-03-02 92) * initialization of them requires brackets. This creates a dependency b17ef2ed624aa7 Steven Rostedt (VMware 2017-03-02 93) * on the order of the struct with the initializers. If any fields b17ef2ed624aa7 Steven Rostedt (VMware 2017-03-02 94) * are added, STATIC_KEY_INIT_TRUE and STATIC_KEY_INIT_FALSE may need b17ef2ed624aa7 Steven Rostedt (VMware 2017-03-02 95) * to be modified. b17ef2ed624aa7 Steven Rostedt (VMware 2017-03-02 96) * 3821fd35b58dba Jason Baron 2017-02-03 97 * bit 0 => 1 if key is initially true 3821fd35b58dba Jason Baron 2017-02-03 98 * 0 if initially false 3821fd35b58dba Jason Baron 2017-02-03 99 * bit 1 => 1 if points to struct static_key_mod 3821fd35b58dba Jason Baron 2017-02-03 100 * 0 if points to struct jump_entry 3821fd35b58dba Jason Baron 2017-02-03 101 */ 3821fd35b58dba Jason Baron 2017-02-03 102 union { 3821fd35b58dba Jason Baron 2017-02-03 103 unsigned long type; d430d3d7e646eb Jason Baron 2011-03-16 104 struct jump_entry *entries; c5905afb0ee655 Ingo Molnar 2012-02-24 105 struct static_key_mod *next; 3821fd35b58dba Jason Baron 2017-02-03 106 }; d430d3d7e646eb Jason Baron 2011-03-16 107 }; d430d3d7e646eb Jason Baron 2011-03-16 108 ea5e9539abf125 Mel Gorman 2014-06-04 109 #else ea5e9539abf125 Mel Gorman 2014-06-04 110 struct static_key { ea5e9539abf125 Mel Gorman 2014-06-04 111 atomic_t enabled; ea5e9539abf125 Mel Gorman 2014-06-04 112 }; e9666d10a5677a Masahiro Yamada 2018-12-31 113 #endif /* CONFIG_JUMP_LABEL */ c0ccf6f99e3a43 Anton Blanchard 2015-04-09 114 #endif /* __ASSEMBLY__ */ c0ccf6f99e3a43 Anton Blanchard 2015-04-09 115 e9666d10a5677a Masahiro Yamada 2018-12-31 116 #ifdef CONFIG_JUMP_LABEL c0ccf6f99e3a43 Anton Blanchard 2015-04-09 117 #include <asm/jump_label.h> 9ae033aca8d600 Ard Biesheuvel 2018-09-18 118 9ae033aca8d600 Ard Biesheuvel 2018-09-18 119 #ifndef __ASSEMBLY__ 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 120 #ifdef CONFIG_HAVE_ARCH_JUMP_LABEL_RELATIVE 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 121 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 122 struct jump_entry { 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 123 s32 code; 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 124 s32 target; 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 125 long key; // key may be far away from the core kernel under KASLR 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 126 }; 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 127 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 128 static inline unsigned long jump_entry_code(const struct jump_entry *entry) 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 129 { 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 130 return (unsigned long)&entry->code + entry->code; 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 131 } 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 132 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 133 static inline unsigned long jump_entry_target(const struct jump_entry *entry) 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 134 { 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 135 return (unsigned long)&entry->target + entry->target; 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 136 } 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 137 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 138 static inline struct static_key *jump_entry_key(const struct jump_entry *entry) 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 139 { 19483677684b6c Ard Biesheuvel 2018-09-18 140 long offset = entry->key & ~3L; 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 141 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 142 return (struct static_key *)((unsigned long)&entry->key + offset); 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 143 } 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 144 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 145 #else 9ae033aca8d600 Ard Biesheuvel 2018-09-18 146 9ae033aca8d600 Ard Biesheuvel 2018-09-18 147 static inline unsigned long jump_entry_code(const struct jump_entry *entry) 9ae033aca8d600 Ard Biesheuvel 2018-09-18 148 { 9ae033aca8d600 Ard Biesheuvel 2018-09-18 149 return entry->code; 9ae033aca8d600 Ard Biesheuvel 2018-09-18 150 } 9ae033aca8d600 Ard Biesheuvel 2018-09-18 151 9ae033aca8d600 Ard Biesheuvel 2018-09-18 152 static inline unsigned long jump_entry_target(const struct jump_entry *entry) 9ae033aca8d600 Ard Biesheuvel 2018-09-18 153 { 9ae033aca8d600 Ard Biesheuvel 2018-09-18 154 return entry->target; 9ae033aca8d600 Ard Biesheuvel 2018-09-18 155 } 9ae033aca8d600 Ard Biesheuvel 2018-09-18 156 9ae033aca8d600 Ard Biesheuvel 2018-09-18 157 static inline struct static_key *jump_entry_key(const struct jump_entry *entry) 9ae033aca8d600 Ard Biesheuvel 2018-09-18 158 { 19483677684b6c Ard Biesheuvel 2018-09-18 159 return (struct static_key *)((unsigned long)entry->key & ~3UL); 9ae033aca8d600 Ard Biesheuvel 2018-09-18 160 } 9ae033aca8d600 Ard Biesheuvel 2018-09-18 161 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 162 #endif 50ff18ab497aa2 Ard Biesheuvel 2018-09-18 163 9ae033aca8d600 Ard Biesheuvel 2018-09-18 164 static inline bool jump_entry_is_branch(const struct jump_entry *entry) 9ae033aca8d600 Ard Biesheuvel 2018-09-18 165 { 9ae033aca8d600 Ard Biesheuvel 2018-09-18 166 return (unsigned long)entry->key & 1UL; 9ae033aca8d600 Ard Biesheuvel 2018-09-18 167 } 9ae033aca8d600 Ard Biesheuvel 2018-09-18 168 9ae033aca8d600 Ard Biesheuvel 2018-09-18 169 static inline bool jump_entry_is_init(const struct jump_entry *entry) 9ae033aca8d600 Ard Biesheuvel 2018-09-18 170 { 19483677684b6c Ard Biesheuvel 2018-09-18 171 return (unsigned long)entry->key & 2UL; 9ae033aca8d600 Ard Biesheuvel 2018-09-18 172 } 9ae033aca8d600 Ard Biesheuvel 2018-09-18 173 5af0ea293d78c8 Peter Zijlstra 2021-05-06 174 static inline void jump_entry_set_init(struct jump_entry *entry, bool set) 9ae033aca8d600 Ard Biesheuvel 2018-09-18 175 { 5af0ea293d78c8 Peter Zijlstra 2021-05-06 176 if (set) 19483677684b6c Ard Biesheuvel 2018-09-18 177 entry->key |= 2; 5af0ea293d78c8 Peter Zijlstra 2021-05-06 178 else 5af0ea293d78c8 Peter Zijlstra 2021-05-06 179 entry->key &= ~2; 9ae033aca8d600 Ard Biesheuvel 2018-09-18 180 } 9ae033aca8d600 Ard Biesheuvel 2018-09-18 181 fa5e5dc39669b4 Peter Zijlstra 2021-05-06 182 static inline int jump_entry_size(struct jump_entry *entry) fa5e5dc39669b4 Peter Zijlstra 2021-05-06 183 { fa5e5dc39669b4 Peter Zijlstra 2021-05-06 184 #ifdef JUMP_LABEL_NOP_SIZE fa5e5dc39669b4 Peter Zijlstra 2021-05-06 185 return JUMP_LABEL_NOP_SIZE; fa5e5dc39669b4 Peter Zijlstra 2021-05-06 186 #else fa5e5dc39669b4 Peter Zijlstra 2021-05-06 187 return arch_jump_entry_size(entry); fa5e5dc39669b4 Peter Zijlstra 2021-05-06 188 #endif fa5e5dc39669b4 Peter Zijlstra 2021-05-06 189 } fa5e5dc39669b4 Peter Zijlstra 2021-05-06 190 9ae033aca8d600 Ard Biesheuvel 2018-09-18 191 #endif c0ccf6f99e3a43 Anton Blanchard 2015-04-09 192 #endif c0ccf6f99e3a43 Anton Blanchard 2015-04-09 193 c0ccf6f99e3a43 Anton Blanchard 2015-04-09 194 #ifndef __ASSEMBLY__ bf5438fca2950b Jason Baron 2010-09-17 195 bf5438fca2950b Jason Baron 2010-09-17 196 enum jump_label_type { 76b235c6bcb160 Peter Zijlstra 2015-07-24 197 JUMP_LABEL_NOP = 0, 76b235c6bcb160 Peter Zijlstra 2015-07-24 198 JUMP_LABEL_JMP, bf5438fca2950b Jason Baron 2010-09-17 199 }; bf5438fca2950b Jason Baron 2010-09-17 200 bf5438fca2950b Jason Baron 2010-09-17 201 struct module; bf5438fca2950b Jason Baron 2010-09-17 202 e9666d10a5677a Masahiro Yamada 2018-12-31 203 #ifdef CONFIG_JUMP_LABEL 4c5ea0a9cd02d6 Paolo Bonzini 2016-06-21 204 a1efb01feca597 Peter Zijlstra 2015-07-24 205 #define JUMP_TYPE_FALSE 0UL a1efb01feca597 Peter Zijlstra 2015-07-24 206 #define JUMP_TYPE_TRUE 1UL 3821fd35b58dba Jason Baron 2017-02-03 207 #define JUMP_TYPE_LINKED 2UL 3821fd35b58dba Jason Baron 2017-02-03 208 #define JUMP_TYPE_MASK 3UL c5905afb0ee655 Ingo Molnar 2012-02-24 209 c5905afb0ee655 Ingo Molnar 2012-02-24 210 static __always_inline bool static_key_false(struct static_key *key) c5905afb0ee655 Ingo Molnar 2012-02-24 211 { 11276d5306b8e5 Peter Zijlstra 2015-07-24 212 return arch_static_branch(key, false); c5905afb0ee655 Ingo Molnar 2012-02-24 213 } d430d3d7e646eb Jason Baron 2011-03-16 214 c5905afb0ee655 Ingo Molnar 2012-02-24 215 static __always_inline bool static_key_true(struct static_key *key) c5905afb0ee655 Ingo Molnar 2012-02-24 216 { 11276d5306b8e5 Peter Zijlstra 2015-07-24 217 return !arch_static_branch(key, true); c5905afb0ee655 Ingo Molnar 2012-02-24 218 } c5905afb0ee655 Ingo Molnar 2012-02-24 219 bf5438fca2950b Jason Baron 2010-09-17 220 extern struct jump_entry __start___jump_table[]; bf5438fca2950b Jason Baron 2010-09-17 221 extern struct jump_entry __stop___jump_table[]; bf5438fca2950b Jason Baron 2010-09-17 222 97ce2c88f9ad42 Jeremy Fitzhardinge 2011-10-12 223 extern void jump_label_init(void); 91bad2f8d30574 Jason Baron 2010-10-01 224 extern void jump_label_lock(void); 91bad2f8d30574 Jason Baron 2010-10-01 225 extern void jump_label_unlock(void); bf5438fca2950b Jason Baron 2010-09-17 226 extern void arch_jump_label_transform(struct jump_entry *entry, bf5438fca2950b Jason Baron 2010-09-17 227 enum jump_label_type type); 20284aa77c0f62 Jeremy Fitzhardinge 2011-10-03 228 extern void arch_jump_label_transform_static(struct jump_entry *entry, 20284aa77c0f62 Jeremy Fitzhardinge 2011-10-03 229 enum jump_label_type type); c2ba8a15f310d9 Daniel Bristot de Oliveira 2019-06-12 230 extern bool arch_jump_label_transform_queue(struct jump_entry *entry, c2ba8a15f310d9 Daniel Bristot de Oliveira 2019-06-12 231 enum jump_label_type type); c2ba8a15f310d9 Daniel Bristot de Oliveira 2019-06-12 232 extern void arch_jump_label_transform_apply(void); 4c3ef6d79328c0 Jason Baron 2010-09-17 233 extern int jump_label_text_reserved(void *start, void *end); c5905afb0ee655 Ingo Molnar 2012-02-24 234 extern void static_key_slow_inc(struct static_key *key); c5905afb0ee655 Ingo Molnar 2012-02-24 235 extern void static_key_slow_dec(struct static_key *key); ce48c146495a1a Peter Zijlstra 2018-01-22 236 extern void static_key_slow_inc_cpuslocked(struct static_key *key); ce48c146495a1a Peter Zijlstra 2018-01-22 237 extern void static_key_slow_dec_cpuslocked(struct static_key *key); d430d3d7e646eb Jason Baron 2011-03-16 238 extern void jump_label_apply_nops(struct module *mod); 1f69bf9c613760 Jason Baron 2016-08-03 239 extern int static_key_count(struct static_key *key); 1f69bf9c613760 Jason Baron 2016-08-03 240 extern void static_key_enable(struct static_key *key); 1f69bf9c613760 Jason Baron 2016-08-03 241 extern void static_key_disable(struct static_key *key); 5a40527f8f0798 Marc Zyngier 2017-08-01 242 extern void static_key_enable_cpuslocked(struct static_key *key); 5a40527f8f0798 Marc Zyngier 2017-08-01 243 extern void static_key_disable_cpuslocked(struct static_key *key); c5905afb0ee655 Ingo Molnar 2012-02-24 244 1f69bf9c613760 Jason Baron 2016-08-03 245 /* 1f69bf9c613760 Jason Baron 2016-08-03 246 * We should be using ATOMIC_INIT() for initializing .enabled, but 1f69bf9c613760 Jason Baron 2016-08-03 247 * the inclusion of atomic.h is problematic for inclusion of jump_label.h 1f69bf9c613760 Jason Baron 2016-08-03 248 * in 'low-level' headers. Thus, we are initializing .enabled with a 1f69bf9c613760 Jason Baron 2016-08-03 249 * raw value, but have added a BUILD_BUG_ON() to catch any issues in 1f69bf9c613760 Jason Baron 2016-08-03 250 * jump_label_init() see: kernel/jump_label.c. 1f69bf9c613760 Jason Baron 2016-08-03 251 */ 11276d5306b8e5 Peter Zijlstra 2015-07-24 252 #define STATIC_KEY_INIT_TRUE \ 1f69bf9c613760 Jason Baron 2016-08-03 253 { .enabled = { 1 }, \ cd8d860dcce906 Boris Ostrovsky 2017-02-28 254 { .entries = (void *)JUMP_TYPE_TRUE } } 11276d5306b8e5 Peter Zijlstra 2015-07-24 255 #define STATIC_KEY_INIT_FALSE \ 1f69bf9c613760 Jason Baron 2016-08-03 256 { .enabled = { 0 }, \ cd8d860dcce906 Boris Ostrovsky 2017-02-28 257 { .entries = (void *)JUMP_TYPE_FALSE } } bf5438fca2950b Jason Baron 2010-09-17 258 e9666d10a5677a Masahiro Yamada 2018-12-31 259 #else /* !CONFIG_JUMP_LABEL */ bf5438fca2950b Jason Baron 2010-09-17 260 1f69bf9c613760 Jason Baron 2016-08-03 261 #include <linux/atomic.h> 1f69bf9c613760 Jason Baron 2016-08-03 262 #include <linux/bug.h> 1f69bf9c613760 Jason Baron 2016-08-03 263 4c5ea0a9cd02d6 Paolo Bonzini 2016-06-21 264 static inline int static_key_count(struct static_key *key) 4c5ea0a9cd02d6 Paolo Bonzini 2016-06-21 265 { 4c5ea0a9cd02d6 Paolo Bonzini 2016-06-21 @266 return atomic_read(&key->enabled); 4c5ea0a9cd02d6 Paolo Bonzini 2016-06-21 267 } 4c5ea0a9cd02d6 Paolo Bonzini 2016-06-21 268 97ce2c88f9ad42 Jeremy Fitzhardinge 2011-10-12 269 static __always_inline void jump_label_init(void) 97ce2c88f9ad42 Jeremy Fitzhardinge 2011-10-12 270 { c4b2c0c5f647aa Hannes Frederic Sowa 2013-10-19 271 static_key_initialized = true; 97ce2c88f9ad42 Jeremy Fitzhardinge 2011-10-12 272 } 97ce2c88f9ad42 Jeremy Fitzhardinge 2011-10-12 273 c5905afb0ee655 Ingo Molnar 2012-02-24 274 static __always_inline bool static_key_false(struct static_key *key) c5905afb0ee655 Ingo Molnar 2012-02-24 275 { 2f0df49c89acaa Steven Rostedt (VMware 2020-12-11 276) if (unlikely_notrace(static_key_count(key) > 0)) c5905afb0ee655 Ingo Molnar 2012-02-24 277 return true; c5905afb0ee655 Ingo Molnar 2012-02-24 278 return false; c5905afb0ee655 Ingo Molnar 2012-02-24 279 } c5905afb0ee655 Ingo Molnar 2012-02-24 280 c5905afb0ee655 Ingo Molnar 2012-02-24 281 static __always_inline bool static_key_true(struct static_key *key) d430d3d7e646eb Jason Baron 2011-03-16 282 { 2f0df49c89acaa Steven Rostedt (VMware 2020-12-11 283) if (likely_notrace(static_key_count(key) > 0)) d430d3d7e646eb Jason Baron 2011-03-16 284 return true; d430d3d7e646eb Jason Baron 2011-03-16 285 return false; d430d3d7e646eb Jason Baron 2011-03-16 286 } bf5438fca2950b Jason Baron 2010-09-17 287 c5905afb0ee655 Ingo Molnar 2012-02-24 288 static inline void static_key_slow_inc(struct static_key *key) d430d3d7e646eb Jason Baron 2011-03-16 289 { 5cdda5117e125e Borislav Petkov 2017-10-18 290 STATIC_KEY_CHECK_USE(key); d430d3d7e646eb Jason Baron 2011-03-16 @291 atomic_inc(&key->enabled); d430d3d7e646eb Jason Baron 2011-03-16 292 } bf5438fca2950b Jason Baron 2010-09-17 293 c5905afb0ee655 Ingo Molnar 2012-02-24 294 static inline void static_key_slow_dec(struct static_key *key) bf5438fca2950b Jason Baron 2010-09-17 295 { 5cdda5117e125e Borislav Petkov 2017-10-18 296 STATIC_KEY_CHECK_USE(key); d430d3d7e646eb Jason Baron 2011-03-16 @297 atomic_dec(&key->enabled); bf5438fca2950b Jason Baron 2010-09-17 298 } bf5438fca2950b Jason Baron 2010-09-17 299 ce48c146495a1a Peter Zijlstra 2018-01-22 300 #define static_key_slow_inc_cpuslocked(key) static_key_slow_inc(key) ce48c146495a1a Peter Zijlstra 2018-01-22 301 #define static_key_slow_dec_cpuslocked(key) static_key_slow_dec(key) ce48c146495a1a Peter Zijlstra 2018-01-22 302 4c3ef6d79328c0 Jason Baron 2010-09-17 303 static inline int jump_label_text_reserved(void *start, void *end) 4c3ef6d79328c0 Jason Baron 2010-09-17 304 { 4c3ef6d79328c0 Jason Baron 2010-09-17 305 return 0; 4c3ef6d79328c0 Jason Baron 2010-09-17 306 } 4c3ef6d79328c0 Jason Baron 2010-09-17 307 91bad2f8d30574 Jason Baron 2010-10-01 308 static inline void jump_label_lock(void) {} 91bad2f8d30574 Jason Baron 2010-10-01 309 static inline void jump_label_unlock(void) {} 91bad2f8d30574 Jason Baron 2010-10-01 310 d430d3d7e646eb Jason Baron 2011-03-16 311 static inline int jump_label_apply_nops(struct module *mod) d430d3d7e646eb Jason Baron 2011-03-16 312 { d430d3d7e646eb Jason Baron 2011-03-16 313 return 0; d430d3d7e646eb Jason Baron 2011-03-16 314 } b202952075f626 Gleb Natapov 2011-11-27 315 e33886b38cc82a Peter Zijlstra 2015-07-24 316 static inline void static_key_enable(struct static_key *key) e33886b38cc82a Peter Zijlstra 2015-07-24 317 { 5cdda5117e125e Borislav Petkov 2017-10-18 318 STATIC_KEY_CHECK_USE(key); e33886b38cc82a Peter Zijlstra 2015-07-24 319 1dbb6704de91b1 Paolo Bonzini 2017-08-01 320 if (atomic_read(&key->enabled) != 0) { 1dbb6704de91b1 Paolo Bonzini 2017-08-01 @321 WARN_ON_ONCE(atomic_read(&key->enabled) != 1); 1dbb6704de91b1 Paolo Bonzini 2017-08-01 322 return; 1dbb6704de91b1 Paolo Bonzini 2017-08-01 323 } 1dbb6704de91b1 Paolo Bonzini 2017-08-01 @324 atomic_set(&key->enabled, 1); e33886b38cc82a Peter Zijlstra 2015-07-24 325 } e33886b38cc82a Peter Zijlstra 2015-07-24 326
:::::: The code at line 266 was first introduced by commit :::::: 4c5ea0a9cd02d6aa8adc86e100b2a4cff8d614ff locking/static_key: Fix concurrent static_key_slow_inc()
:::::: TO: Paolo Bonzini <pbonzini@redhat.com> :::::: CC: Ingo Molnar <mingo@kernel.org>
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