Following build errors noticed while building Linux next 20211001 with gcc-11 for parisc architecture. arch/parisc/kernel/stacktrace.c: In function 'dump_trace': arch/parisc/kernel/stacktrace.c:20:13: error: 'regs' undeclared (first use in this function) 20 | if (regs) | ^~~~ arch/parisc/kernel/stacktrace.c:20:13: note: each undeclared identifier is reported only once for each function it appears in arch/parisc/kernel/stacktrace.c:21:22: error: implicit declaration of function 'fn' [-Werror=implicit-function-declaration] 21 | if (!fn(cookie, regs->iaoq[0])) | ^~ arch/parisc/kernel/stacktrace.c:21:25: error: 'cookie' undeclared (first use in this function) 21 | if (!fn(cookie, regs->iaoq[0])) | ^~~~~~ cc1: some warnings being treated as errors make[3]: *** [scripts/Makefile.build:288: arch/parisc/kernel/stacktrace.o] Error 1 Build config: https://builds.tuxbuild.com/1ytbtyEg5SDSQgS2Oj9RsCM4ZmS/config Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx> meta data: ----------- git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next git_sha: a25006a77348ba06c7bc96520d331cd9dd370715 git_short_log: a25006a77348 (\"Add linux-next specific files for 20211001\") kconfig: defconfig kernel_version: 5.15.0-rc3 target_arch: parisc toolchain: gcc-11 steps to reproduce: https://builds.tuxbuild.com/1ytbtyEg5SDSQgS2Oj9RsCM4ZmS/tuxmake_reproducer.sh -- Linaro LKFT https://lkft.linaro.org