tree: https://android.googlesource.com/kernel/common android12-5.10 head: 811618a9016c45b1f01ec5ff7f9624aae6495bc7 commit: 03f232dcf8d411cd1b7fa6207018b706dbaf8229 [9/10] ANDROID: usb: f_accessory: Avoid bitfields for shared variables config: i386-randconfig-s032-20210607 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android12-5.10 git checkout 03f232dcf8d411cd1b7fa6207018b706dbaf8229 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' 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; sparse warnings: (new ones prefixed by >>) drivers/usb/gadget/function/f_accessory.c:779:35: sparse: sparse: Using plain integer as NULL pointer drivers/usb/gadget/function/f_accessory.c:793:23: sparse: sparse: Using plain integer as NULL pointer drivers/usb/gadget/function/f_accessory.c:835:23: sparse: sparse: Using plain integer as NULL pointer Please review and possibly fold the followup patch. vim +372 drivers/usb/gadget/function/f_accessory.c 483cb5629ea789 Benoit Goby 2011-12-19 363 483cb5629ea789 Benoit Goby 2011-12-19 364 /* remove a request from the head of a list */ 483cb5629ea789 Benoit Goby 2011-12-19 365 static struct usb_request *req_get(struct acc_dev *dev, struct list_head *head) 483cb5629ea789 Benoit Goby 2011-12-19 366 { 483cb5629ea789 Benoit Goby 2011-12-19 367 unsigned long flags; 483cb5629ea789 Benoit Goby 2011-12-19 368 struct usb_request *req; 483cb5629ea789 Benoit Goby 2011-12-19 369 483cb5629ea789 Benoit Goby 2011-12-19 370 spin_lock_irqsave(&dev->lock, flags); 483cb5629ea789 Benoit Goby 2011-12-19 371 if (list_empty(head)) { 483cb5629ea789 Benoit Goby 2011-12-19 @372 req = 0; 483cb5629ea789 Benoit Goby 2011-12-19 373 } else { 483cb5629ea789 Benoit Goby 2011-12-19 374 req = list_first_entry(head, struct usb_request, list); 483cb5629ea789 Benoit Goby 2011-12-19 375 list_del(&req->list); 483cb5629ea789 Benoit Goby 2011-12-19 376 } 483cb5629ea789 Benoit Goby 2011-12-19 377 spin_unlock_irqrestore(&dev->lock, flags); 483cb5629ea789 Benoit Goby 2011-12-19 378 return req; 483cb5629ea789 Benoit Goby 2011-12-19 379 } 483cb5629ea789 Benoit Goby 2011-12-19 380 :::::: The code at line 372 was first introduced by commit :::::: 483cb5629ea7893f94481511e630ae14a5c0d1c0 ANDROID: usb: gadget: f_accessory: Add Android Accessory function :::::: TO: Benoit Goby <benoit(a)android.com&gt; :::::: CC: Todd Kjos <tkjos(a)google.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org