Messages in this thread | | | Date | Sat, 6 Nov 2021 22:44:54 +0800 | From | kernel test robot <> | Subject | [bp:rc0+notifiers 32/32] drivers/macintosh/adbhid.c:1265:9: warning: ignoring return value of 'blocking_notifier_chain_register' declared with attribute 'warn_unused_result' |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/bp/bp.git rc0+notifiers head: 29ab05dcfc8e05ffc1cae77249ea956b787939d2 commit: 29ab05dcfc8e05ffc1cae77249ea956b787939d2 [32/32] notifier: Return an error when callback is already registered config: m68k-defconfig (attached as .config) compiler: m68k-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/bp/bp.git/commit/?id=29ab05dcfc8e05ffc1cae77249ea956b787939d2 git remote add bp https://git.kernel.org/pub/scm/linux/kernel/git/bp/bp.git git fetch --no-tags bp rc0+notifiers git checkout 29ab05dcfc8e05ffc1cae77249ea956b787939d2 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=m68k
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
drivers/macintosh/adbhid.c: In function 'adbhid_init': >> drivers/macintosh/adbhid.c:1265:9: warning: ignoring return value of 'blocking_notifier_chain_register' declared with attribute 'warn_unused_result' [-Wunused-result] 1265 | blocking_notifier_chain_register(&adb_client_list, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1266 | &adbhid_adb_notifier); | ~~~~~~~~~~~~~~~~~~~~~
vim +1265 drivers/macintosh/adbhid.c
^1da177e4c3f41 Linus Torvalds 2005-04-16 1260 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1261 led_request.complete = 1; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1262 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1263 adbhid_probe(); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1264 e041c683412d5b Alan Stern 2006-03-27 @1265 blocking_notifier_chain_register(&adb_client_list, e041c683412d5b Alan Stern 2006-03-27 1266 &adbhid_adb_notifier); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1267 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1268 return 0; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1269 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1270
:::::: The code at line 1265 was first introduced by commit :::::: e041c683412d5bf44dc2b109053e3b837b71742d [PATCH] Notifier chain update: API changes
:::::: TO: Alan Stern <stern@rowland.harvard.edu> :::::: CC: Linus Torvalds <torvalds@g5.osdl.org>
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