tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tmp.tmp2 head: adcceb5eb7aee38e4a9c15bdf599655f0e1b1324 commit: a490873e1d58c0b339bb50ee382dc1fe95c6d9a4 [255/364] sched/headers, printk: Reduce header dependencies config: x86_64-rhel-8.3 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=a490873e1d58c0b339bb50ee382dc1fe95c6d9a4 git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git git fetch --no-tags tip tmp.tmp2 git checkout a490873e1d58c0b339bb50ee382dc1fe95c6d9a4 # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All error/warnings (new ones prefixed by >>): In file included from include/linux/kernel.h:7, from include/linux/crypto.h:16, from include/crypto/algapi.h:10, from crypto/arc4.c:10: crypto/arc4.c: In function 'crypto_arc4_init': >> include/linux/printk.h:505:9: error: type defaults to 'int' in declaration of 'DEFINE_RATELIMIT_STATE' [-Werror=implicit-int] 505 | static DEFINE_RATELIMIT_STATE(_rs, \ | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/printk.h:526:2: note: in expansion of macro 'printk_ratelimited' 526 | printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~~~~~~~~~ crypto/arc4.c:46:2: note: in expansion of macro 'pr_warn_ratelimited' 46 | pr_warn_ratelimited("\"%s\" (%ld) uses obsolete ecb(arc4) skcipher\n", | ^~~~~~~~~~~~~~~~~~~ >> crypto/arc4.c:46:2: warning: parameter names (without types) in function declaration In file included from include/linux/kernel.h:7, from include/linux/crypto.h:16, from include/crypto/algapi.h:10, from crypto/arc4.c:10: >> include/linux/printk.h:505:9: error: invalid storage class for function 'DEFINE_RATELIMIT_STATE' 505 | static DEFINE_RATELIMIT_STATE(_rs, \ | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/printk.h:526:2: note: in expansion of macro 'printk_ratelimited' 526 | printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~~~~~~~~~ crypto/arc4.c:46:2: note: in expansion of macro 'pr_warn_ratelimited' 46 | pr_warn_ratelimited("\"%s\" (%ld) uses obsolete ecb(arc4) skcipher\n", | ^~~~~~~~~~~~~~~~~~~ >> include/linux/printk.h:509:6: error: implicit declaration of function '__ratelimit' [-Werror=implicit-function-declaration] 509 | if (__ratelimit(&_rs)) \ | ^~~~~~~~~~~ include/linux/printk.h:526:2: note: in expansion of macro 'printk_ratelimited' 526 | printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~~~~~~~~~ crypto/arc4.c:46:2: note: in expansion of macro 'pr_warn_ratelimited' 46 | pr_warn_ratelimited("\"%s\" (%ld) uses obsolete ecb(arc4) skcipher\n", | ^~~~~~~~~~~~~~~~~~~ >> include/linux/printk.h:509:19: error: '_rs' undeclared (first use in this function) 509 | if (__ratelimit(&_rs)) \ | ^~~ include/linux/printk.h:526:2: note: in expansion of macro 'printk_ratelimited' 526 | printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~~~~~~~~~ crypto/arc4.c:46:2: note: in expansion of macro 'pr_warn_ratelimited' 46 | pr_warn_ratelimited("\"%s\" (%ld) uses obsolete ecb(arc4) skcipher\n", | ^~~~~~~~~~~~~~~~~~~ include/linux/printk.h:509:19: note: each undeclared identifier is reported only once for each function it appears in 509 | if (__ratelimit(&_rs)) \ | ^~~ include/linux/printk.h:526:2: note: in expansion of macro 'printk_ratelimited' 526 | printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~~~~~~~~~ crypto/arc4.c:46:2: note: in expansion of macro 'pr_warn_ratelimited' 46 | pr_warn_ratelimited("\"%s\" (%ld) uses obsolete ecb(arc4) skcipher\n", | ^~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +505 include/linux/printk.h 16cb839f133249 Joe Perches 2011-01-12 497 968ab1838a5d48 Linus Torvalds 2010-11-15 498 /* 968ab1838a5d48 Linus Torvalds 2010-11-15 499 * ratelimited messages with local ratelimit_state, 968ab1838a5d48 Linus Torvalds 2010-11-15 500 * no local ratelimit_state used in the !PRINTK case 968ab1838a5d48 Linus Torvalds 2010-11-15 501 */ 968ab1838a5d48 Linus Torvalds 2010-11-15 502 #ifdef CONFIG_PRINTK 6ec42a56e25846 Joe Perches 2011-01-12 503 #define printk_ratelimited(fmt, ...) \ 6ec42a56e25846 Joe Perches 2011-01-12 504 ({ \ 968ab1838a5d48 Linus Torvalds 2010-11-15 @505 static DEFINE_RATELIMIT_STATE(_rs, \ 968ab1838a5d48 Linus Torvalds 2010-11-15 506 DEFAULT_RATELIMIT_INTERVAL, \ 968ab1838a5d48 Linus Torvalds 2010-11-15 507 DEFAULT_RATELIMIT_BURST); \ 968ab1838a5d48 Linus Torvalds 2010-11-15 508 \ 968ab1838a5d48 Linus Torvalds 2010-11-15 @509 if (__ratelimit(&_rs)) \ 968ab1838a5d48 Linus Torvalds 2010-11-15 510 printk(fmt, ##__VA_ARGS__); \ 968ab1838a5d48 Linus Torvalds 2010-11-15 511 }) 968ab1838a5d48 Linus Torvalds 2010-11-15 512 #else 6ec42a56e25846 Joe Perches 2011-01-12 513 #define printk_ratelimited(fmt, ...) \ 6ec42a56e25846 Joe Perches 2011-01-12 514 no_printk(fmt, ##__VA_ARGS__) 968ab1838a5d48 Linus Torvalds 2010-11-15 515 #endif 968ab1838a5d48 Linus Torvalds 2010-11-15 516 :::::: The code at line 505 was first introduced by commit :::::: 968ab1838a5d48f02f5b471aa1d0e59e2cc2ccbc include/linux/kernel.h: Move logging bits to include/linux/printk.h :::::: TO: Linus Torvalds :::::: CC: Linus Torvalds --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org