Messages in this thread | | | Date | Wed, 21 Jul 2021 12:24:29 +0300 | From | Dan Carpenter <> | Subject | [kbuild] x86_64/xen_shinfo_test.c:109:9: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' |
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Hi David,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b commit: 30b5c851af7991ad08abe90c1e7c31615fa98a1a KVM: x86/xen: Add support for vCPU runstate information config: x86_64-rhel-8.3-kselftests (attached as .config) compiler: gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=30b5c851af7991ad08abe90c1e7c31615fa98a1a git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 30b5c851af7991ad08abe90c1e7c31615fa98a1a # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64
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 >>):
x86_64/xen_shinfo_test.c: In function 'get_run_delay': >> x86_64/xen_shinfo_test.c:109:9: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 109 | fscanf(fp, "%ld %ld ", &val[0], &val[1]); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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