[kbuild-all] drivers/misc/habanalabs/common/irq.c:50:12: warning: no previous declaration for 'hl_eq_inc_ptr'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: ac30d8ce28d61c05ac3a8b1452e889371136f3af commit: 70b2f993ea4a79c298aac4ec1c58089020536ba5 habanalabs: create common folder date: 7 months ago config: i386-randconfig-a014-20200624 (attached as .config) compiler: gcc-4.9 (Ubuntu 4.9.3-13ubuntu2) 4.9.3 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 70b2f993ea4a79c298aac4ec1c58089020536ba5 # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): inline u32 hl_eq_inc_ptr(u32 ptr) ^ vim +/hl_eq_inc_ptr +50 drivers/misc/habanalabs/common/irq.c 9494a8dd8d22cb drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 41 3db99f000b76bb drivers/misc/habanalabs/irq.c Lee Jones 2020-07-01 42 /** 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 43 * hl_eq_inc_ptr - increment ci of eq 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 44 * 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 45 * @ptr: the current ci value of the event queue 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 46 * 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 47 * Increment ptr by 1. If it reaches the number of event queue 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 48 * entries, set it to 0 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 49 */ 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 @50 inline u32 hl_eq_inc_ptr(u32 ptr) 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 51 { 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 52 ptr++; 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 53 if (unlikely(ptr == HL_EQ_LENGTH)) 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 54 ptr = 0; 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 55 return ptr; 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 56 } 1251f23ae8583b drivers/misc/habanalabs/irq.c Oded Gabbay 2019-02-16 57 :::::: The code at line 50 was first introduced by commit :::::: 1251f23ae8583b1bb99c3db07102f4c9cc3160fe habanalabs: add event queue and interrupts :::::: TO: Oded Gabbay <oded.gabbay(a)gmail.com&gt; :::::: CC: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org