On Tue, Oct 31, 2023 at 7:56 AM Bjorn Helgaas <helgaas@xxxxxxxxxx> wrote: > > [+cc powerpc, clang folks] > > On Sat, Oct 28, 2023 at 08:22:54PM +0800, kernel test robot wrote: > > tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git controller/xilinx-xdma > > branch HEAD: 8d786149d78c7784144c7179e25134b6530b714b PCI: xilinx-xdma: Add Xilinx XDMA Root Port driver > > > > Error/Warning ids grouped by kconfigs: > > > > clang_recent_errors > > `-- powerpc-pmac32_defconfig > > |-- arch-powerpc-sysdev-grackle.c:error:unused-function-grackle_set_stg-Werror-Wunused-function > > |-- arch-powerpc-xmon-xmon.c:error:unused-function-get_output_lock-Werror-Wunused-function > > `-- arch-powerpc-xmon-xmon.c:error:unused-function-release_output_lock-Werror-Wunused-function > > This report is close to useless. It doesn't show the complete error > message, it doesn't show how to reproduce the issue, and the pci -next > branch (including controller/xilinx-xdma) doesn't reference any of > these functions: > > $ git grep -E "grackle_set_stg|get_output_lock|release_output_lock" | cat > arch/powerpc/sysdev/grackle.c:static inline void grackle_set_stg(struct pci_controller* bp, int enable) > arch/powerpc/sysdev/grackle.c: grackle_set_stg(hose, 1); > arch/powerpc/xmon/xmon.c:static void get_output_lock(void) > arch/powerpc/xmon/xmon.c:static void release_output_lock(void) > arch/powerpc/xmon/xmon.c:static inline void get_output_lock(void) {} > arch/powerpc/xmon/xmon.c:static inline void release_output_lock(void) {} > arch/powerpc/xmon/xmon.c: get_output_lock(); > arch/powerpc/xmon/xmon.c: release_output_lock(); > arch/powerpc/xmon/xmon.c: get_output_lock(); > arch/powerpc/xmon/xmon.c: release_output_lock(); > arch/powerpc/xmon/xmon.c: get_output_lock(); > arch/powerpc/xmon/xmon.c: release_output_lock(); > arch/powerpc/xmon/xmon.c: get_output_lock(); > arch/powerpc/xmon/xmon.c: release_output_lock(); > > That said, the unused functions do look legit: > > grackle_set_stg() is a static function and the only call is under > "#if 0". Time to remove it then? Or is it a bug that it's not called? Otherwise the definition should be behind the same preprocessor guards as the caller. Same for the below. > > Same with get_output_lock() and release_output_lock(): they're static > and always defined in xmon.c, but only called if either CONFIG_SMP or > CONFIG_DEBUG_FS. > > But they're certainly not related to controller/xilinx-xdma, so I'm > going to ignore them. > > Bjorn > > P.S. Nathan & Nick, I cc'd you because of this earlier report that > also mentioned grackle_set_stg(): > https://lore.kernel.org/lkml/202308121120.u2d3YPVt-lkp@xxxxxxxxx/ -- Thanks, ~Nick Desaulniers
