Messages in this thread | | | Date | Thu, 23 Apr 2020 15:02:27 +0800 | From | kbuild test robot <> | Subject | drivers/usb/gadget/udc/s3c2410_udc.c:255:11: warning: comparison of address of 'ep->queue' equal to a null pointer is always false |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c578ddb39e565139897124e74e5a43e56538cb33 commit: afe956c577b2d5a3d9834e4424587c1ebcf90c4c kbuild: Enable -Wtautological-compare date: 2 weeks ago config: arm-tct_hammer_defconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 2de52422acf04662b45599f77c14ce1b2cec2b81) reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi git checkout afe956c577b2d5a3d9834e4424587c1ebcf90c4c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm
If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/usb/gadget/udc/s3c2410_udc.c:255:11: warning: comparison of address of 'ep->queue' equal to a null pointer is always false [-Wtautological-pointer-compare] if (&ep->queue == NULL) ~~~~^~~~~ ~~~~ 1 warning generated.
vim +255 drivers/usb/gadget/udc/s3c2410_udc.c
3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 250 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 251 static void s3c2410_udc_nuke(struct s3c2410_udc *udc, 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 252 struct s3c2410_ep *ep, int status) 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 253 { 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 254 /* Sanity check */ 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 @255 if (&ep->queue == NULL) 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 256 return; 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 257 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 258 while (!list_empty(&ep->queue)) { 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 259 struct s3c2410_request *req; 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 260 req = list_entry(ep->queue.next, struct s3c2410_request, 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 261 queue); 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 262 s3c2410_udc_done(ep, req, status); 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 263 } 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 264 } 3fc154b6b8134b drivers/usb/gadget/s3c2410_udc.c Arnaud Patard 2007-06-06 265
:::::: The code at line 255 was first introduced by commit :::::: 3fc154b6b8134b98bb94d60cad9a46ec1ffbe372 USB Gadget driver for Samsung s3c2410 ARM SoC
:::::: TO: Arnaud Patard <arnaud.patard@rtp-net.org> :::::: CC: Greg Kroah-Hartman <gregkh@suse.de>
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