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[PATCH OLK-5.10] ftrace: Avoid potential division by zero in function_stat_show()
by Liu Chuang 16 Apr '25

16 Apr '25

From: Nikolay Kuratov <kniv(a)yandex-team.ru> stable inclusion from stable-v5.10.235 commit ca381f60a3bb7cfaa618d73ca411610bd7fc3149 category: bugfix bugzilla: 189268 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit a1a7eb89ca0b89dc1c326eeee2596f263291aca3 upstream. Check whether denominator expression x * (x - 1) * 1000 mod {2^32, 2^64} produce zero and skip stddev computation in that case. For now don't care about rec->counter * rec->counter overflow because rec->time * rec->time overflow will likely happen earlier. Cc: stable(a)vger.kernel.org Cc: Wen Yang <wenyang(a)linux.alibaba.com> Cc: Mark Rutland <mark.rutland(a)arm.com> Cc: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> Link: https://lore.kernel.org/20250206090156.1561783-1-kniv@yandex-team.ru Fixes: e31f7939c1c27 ("ftrace: Avoid potential division by zero in function profiler") Signed-off-by: Nikolay Kuratov <kniv(a)yandex-team.ru> Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Wang Hai <wanghai38(a)huawei.com> --- kernel/trace/ftrace.c | 27 ++++++++++++--------------- 1 file changed, 12 insertions(+), 15 deletions(-) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 923d78cc130c..095ba8ab36cf 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -510,6 +510,7 @@ static int function_stat_show(struct seq_file *m, void *v) static struct trace_seq s; unsigned long long avg; unsigned long long stddev; + unsigned long long stddev_denom; #endif mutex_lock(&ftrace_profile_lock); @@ -531,23 +532,19 @@ static int function_stat_show(struct seq_file *m, void *v) #ifdef CONFIG_FUNCTION_GRAPH_TRACER seq_puts(m, " "); - /* Sample standard deviation (s^2) */ - if (rec->counter <= 1) - stddev = 0; - else { - /* - * Apply Welford's method: - * s^2 = 1 / (n * (n-1)) * (n * \Sum (x_i)^2 - (\Sum x_i)^2) - */ + /* + * Variance formula: + * s^2 = 1 / (n * (n-1)) * (n * \Sum (x_i)^2 - (\Sum x_i)^2) + * Maybe Welford's method is better here? + * Divide only by 1000 for ns^2 -> us^2 conversion. + * trace_print_graph_duration will divide by 1000 again. + */ + stddev = 0; + stddev_denom = rec->counter * (rec->counter - 1) * 1000; + if (stddev_denom) { stddev = rec->counter * rec->time_squared - rec->time * rec->time; - - /* - * Divide only 1000 for ns^2 -> us^2 conversion. - * trace_print_graph_duration will divide 1000 again. - */ - stddev = div64_ul(stddev, - rec->counter * (rec->counter - 1) * 1000); + stddev = div64_ul(stddev, stddev_denom); } trace_seq_init(&s); -- 2.34.1

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[openeuler:OLK-5.10 2862/2862] mm/page_alloc.o: warning: objtool: __drain_all_pages()+0x87: unreachable instruction
by kernel test robot 16 Apr '25

16 Apr '25

Hi Vlastimil, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 2affea8965688b8231cf977864ba7539320d5db8 commit: e037ee4a8deaff7c579618c0aba1f066d6d14b11 [2862/2862] mm, page_alloc: disable pcplists during memory offline config: x86_64-buildonly-randconfig-005-20250415 (https://download.01.org/0day-ci/archive/20250416/202504161818.Kxnq1s4P-lkp@…) compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250416/202504161818.Kxnq1s4P-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202504161818.Kxnq1s4P-lkp@intel.com/ All warnings (new ones prefixed by >>): >> mm/page_alloc.o: warning: objtool: __drain_all_pages()+0x87: unreachable instruction -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-5.10] BUILD REGRESSION 2affea8965688b8231cf977864ba7539320d5db8
by kernel test robot 16 Apr '25

16 Apr '25

tree/branch: https://gitee.com/openeuler/kernel.git OLK-5.10 branch HEAD: 2affea8965688b8231cf977864ba7539320d5db8 !15841 HID: intel-ish-hid: Fix use-after-free issue in ishtp_hid_remove() Error/Warning (recently discovered and may have been fixed): https://lore.kernel.org/oe-kbuild-all/202503171920.f4jVchcy-lkp@intel.com https://lore.kernel.org/oe-kbuild-all/202503220351.uj1q69QX-lkp@intel.com https://lore.kernel.org/oe-kbuild-all/202503220607.nbhzXKry-lkp@intel.com https://lore.kernel.org/oe-kbuild-all/202503260613.Q2n0VF4Y-lkp@intel.com https://lore.kernel.org/oe-kbuild-all/202503260949.1ZCW1y7H-lkp@intel.com https://lore.kernel.org/oe-kbuild-all/202504030550.AkZJTxTF-lkp@intel.com ../lib/gcc/aarch64-linux/5.5.0/plugin/include/config/elfos.h:102:21: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix] ../lib/gcc/aarch64-linux/5.5.0/plugin/include/defaults.h:126:24: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix] ../lib/gcc/aarch64-linux/5.5.0/plugin/include/gimple.h:2556:18: error: 'is_gimple_reg' was not declared in this scope; did you mean 'is_gimple_assign'? ../lib/gcc/aarch64-linux/5.5.0/plugin/include/gimple.h:2790:10: error: 'gimple_call_addr_fndecl' was not declared in this scope; did you mean 'gimple_call_set_fndecl'? ../lib/gcc/aarch64-linux/5.5.0/plugin/include/gimple.h:283:22: error: field 'call_used' has incomplete type 'pt_solution' ../lib/gcc/aarch64-linux/5.5.0/plugin/include/gimple.h:284:22: error: field 'call_clobbered' has incomplete type 'pt_solution' block/bio.o: warning: objtool: bvec_alloc()+0xc4: unreachable instruction block/blk-mq.o: warning: objtool: blk_mq_unquiesce_queue()+0xbc: unreachable instruction block/bounce.o: warning: objtool: __bounce_end_io_read()+0x27d: unreachable instruction drivers/dma/idxd/perfmon.o: warning: objtool: perfmon_init()+0x76: unreachable instruction drivers/dma/ioat/init.o: warning: objtool: ioat3_dma_probe()+0x479: unreachable instruction drivers/md/dm-verity-target.o: warning: objtool: verity_for_bv_block()+0x222: unreachable instruction drivers/scsi/linkdata/ps3stor/./linux/ps3_driver_log.c:41:19: error: unused function 'time_for_log' [-Werror,-Wunused-function] drivers/scsi/linkdata/ps3stor/./linux/ps3_driver_log.c:65:19: error: unused function 'time_for_file_name' [-Werror,-Wunused-function] drivers/scsi/linkdata/ps3stor/ps3_irq.c:22:27: error: unused variable 'PS3_INTERRUPT_CMD_DISABLE_ALL_MASK' [-Werror,-Wunused-const-variable] drivers/scsi/linkdata/ps3stor/ps3_irq.c:23:27: error: unused variable 'PS3_INTERRUPT_CMD_ENABLE_MSIX' [-Werror,-Wunused-const-variable] drivers/scsi/linkdata/ps3stor/ps3_irq.c:24:27: error: unused variable 'PS3_INTERRUPT_MASK_DISABLE' [-Werror,-Wunused-const-variable] drivers/scsi/linkdata/ps3stor/ps3_irq.c:25:27: error: unused variable 'PS3_INTERRUPT_STATUS_EXIST_IRQ' [-Werror,-Wunused-const-variable] drivers/scsi/linkdata/ps3stor/ps3_irq.c:26:27: error: unused variable 'PS3_INTERRUPT_CLEAR_IRQ' [-Werror,-Wunused-const-variable] drivers/scsi/linkdata/ps3stor/ps3_irq.c:28:27: error: unused variable 'PS3_SSD_IOPS_MSIX_VECTORS' [-Werror,-Wunused-const-variable] drivers/scsi/linkdata/ps3stor/ps3_irq.c:29:27: error: unused variable 'PS3_HDD_IOPS_MSIX_VECTORS' [-Werror,-Wunused-const-variable] drivers/scsi/linkdata/ps3stor/ps3_qos.c:3024:6: error: no previous prototype for function 'ps3_hba_qos_waitq_poll' [-Werror,-Wmissing-prototypes] drivers/scsi/linkdata/ps3stor/ps3_qos.c:3280:15: error: no previous prototype for function 'ps3_raid_qos_decision' [-Werror,-Wmissing-prototypes] drivers/scsi/linkdata/ps3stor/ps3_qos.c:3335:6: error: no previous prototype for function 'ps3_qos_mgrq_resend' [-Werror,-Wmissing-prototypes] drivers/scsi/linkdata/ps3stor/ps3_qos.c:3479:6: error: no previous prototype for function 'ps3_raid_qos_waitq_notify' [-Werror,-Wmissing-prototypes] drivers/scsi/linkdata/ps3stor/ps3_qos.c:3822:15: error: no previous prototype for function 'ps3_raid_qos_waitq_abort' [-Werror,-Wmissing-prototypes] drivers/scsi/linkdata/ps3stor/ps3_scsih.c:1959:1: error: unused function 'ps3_scsih_dev_id_get' [-Werror,-Wunused-function] io_uring/io_uring.o: warning: objtool: __io_uring_free()+0x5b: unreachable instruction kismet: WARNING: unmet direct dependencies detected for CPPC_CPUFREQ_SYSFS_INTERFACE when selected by CPU_FREQ_GOV_SEEP ld.lld: error: version script assignment of 'LINUX_2.6' to symbol '__vdso_sgx_enter_enclave' failed: symbol not defined llvm-objcopy: error: 'arch/x86/entry/vdso/vdso64.so.dbg': No such file or directory llvm-objdump: error: 'arch/x86/entry/vdso/vdso64.so.dbg': No such file or directory mm/memory.o: warning: objtool: remap_pfn_range()+0x5b: unreachable instruction mm/mremap.o: warning: objtool: move_pgt_entry()+0xc8: unreachable instruction mm/slab_common.o: warning: objtool: kmalloc_slab()+0x68: unreachable instruction net/sched/sch_choke.o: warning: objtool: choke_enqueue()+0x477: unreachable instruction Unverified Error/Warning (likely false positive, kindly check if interested): drivers/gpu/drm/amd/amdgpu/dce_v10_0.o: warning: objtool: dce_v10_0_bandwidth_update() falls through to next function dce_v10_0_vblank_get_counter() drivers/gpu/drm/amd/amdgpu/dce_v11_0.o: warning: objtool: dce_v11_0_bandwidth_update() falls through to next function dce_v11_0_vblank_get_counter() drivers/gpu/drm/amd/amdgpu/dce_v6_0.o: warning: objtool: dce_v6_0_program_watermarks() falls through to next function dce_v6_0_latency_watermark() drivers/gpu/drm/amd/amdgpu/dce_v8_0.o: warning: objtool: dce_v8_0_bandwidth_update() falls through to next function dce_v8_0_vblank_get_counter() drivers/gpu/drm/radeon/cik.o: warning: objtool: dce8_bandwidth_update() falls through to next function cik_get_gpu_clock_counter() drivers/gpu/drm/radeon/evergreen.o: warning: objtool: evergreen_program_watermarks() falls through to next function evergreen_mc_wait_for_idle() drivers/gpu/drm/radeon/si.o: warning: objtool: dce6_program_watermarks() falls through to next function si_fence_ring_emit() drivers/media/test-drivers/vivid/vivid-kthread-cap.o: warning: objtool: vivid_thread_vid_cap_tick() falls through to next function plane_vaddr() drivers/misc/bh1770glc.o: warning: objtool: bh1770_power_state_store() falls through to next function asan.module_ctor() drivers/net/wireless/ath/ath9k/antenna.o: warning: objtool: ath_ant_comb_scan() falls through to next function asan.module_ctor() drivers/nvdimm/namespace_devs.o: warning: objtool: size_store() falls through to next function nd_namespace_label_update() drivers/target/target_core_user.o: warning: objtool: queue_cmd_ring() falls through to next function scatter_data_area() fs/btrfs/free-space-cache.o: warning: objtool: add_bytes_to_bitmap() falls through to next function recalculate_thresholds() fs/btrfs/free-space-cache.o: warning: objtool: btrfs_alloc_from_cluster() falls through to next function btrfs_find_space_cluster() fs/btrfs/free-space-cache.o: warning: objtool: setup_cluster_bitmap() falls through to next function btrfs_init_free_cluster() fs/btrfs/free-space-cache.o: warning: objtool: steal_from_bitmap() falls through to next function link_free_space() fs/btrfs/free-space-tree.o: warning: objtool: modify_free_space_bitmap() falls through to next function free_space_test_bit() fs/btrfs/free-space-tree.o: warning: objtool: update_free_space_extent_count() falls through to next function add_new_free_space_info() fs/ufs/ialloc.o: warning: objtool: ufs_new_inode() falls through to next function ufs2_init_inodes_chunk() fs/ufs/inode.o: warning: objtool: ufs_iget() falls through to next function ufs_set_inode_ops() mm/vmscan.o: warning: objtool: do_shrink_slab() falls through to next function allow_direct_reclaim() Error/Warning ids grouped by kconfigs: recent_errors |-- arm64-allnoconfig | `-- kismet:WARNING:unmet-direct-dependencies-detected-for-CPPC_CPUFREQ_SYSFS_INTERFACE-when-selected-by-CPU_FREQ_GOV_SEEP |-- arm64-randconfig-002-20250321 | |-- lib-gcc-aarch64-linux-..-plugin-include-config-elfos.h:warning:invalid-suffix-on-literal-C-requires-a-space-between-literal-and-string-macro | |-- lib-gcc-aarch64-linux-..-plugin-include-defaults.h:warning:invalid-suffix-on-literal-C-requires-a-space-between-literal-and-string-macro | |-- lib-gcc-aarch64-linux-..-plugin-include-gimple.h:error:field-call_clobbered-has-incomplete-type-pt_solution | |-- lib-gcc-aarch64-linux-..-plugin-include-gimple.h:error:field-call_used-has-incomplete-type-pt_solution | |-- lib-gcc-aarch64-linux-..-plugin-include-gimple.h:error:gimple_call_addr_fndecl-was-not-declared-in-this-scope | `-- lib-gcc-aarch64-linux-..-plugin-include-gimple.h:error:is_gimple_reg-was-not-declared-in-this-scope |-- x86_64-allnoconfig | |-- ld.lld:error:version-script-assignment-of-LINUX_2.-to-symbol-__vdso_sgx_enter_enclave-failed:symbol-not-defined | |-- llvm-objcopy:error:arch-x86-entry-vdso-vdso64.so.dbg:No-such-file-or-directory | `-- llvm-objdump:error:arch-x86-entry-vdso-vdso64.so.dbg:No-such-file-or-directory |-- x86_64-allyesconfig | |-- drivers-scsi-linkdata-ps3stor-.-linux-ps3_driver_log.c:error:unused-function-time_for_file_name-Werror-Wunused-function | |-- drivers-scsi-linkdata-ps3stor-.-linux-ps3_driver_log.c:error:unused-function-time_for_log-Werror-Wunused-function | |-- drivers-scsi-linkdata-ps3stor-ps3_irq.c:error:unused-variable-PS3_HDD_IOPS_MSIX_VECTORS-Werror-Wunused-const-variable | |-- drivers-scsi-linkdata-ps3stor-ps3_irq.c:error:unused-variable-PS3_INTERRUPT_CLEAR_IRQ-Werror-Wunused-const-variable | |-- drivers-scsi-linkdata-ps3stor-ps3_irq.c:error:unused-variable-PS3_INTERRUPT_CMD_DISABLE_ALL_MASK-Werror-Wunused-const-variable | |-- drivers-scsi-linkdata-ps3stor-ps3_irq.c:error:unused-variable-PS3_INTERRUPT_CMD_ENABLE_MSIX-Werror-Wunused-const-variable | |-- drivers-scsi-linkdata-ps3stor-ps3_irq.c:error:unused-variable-PS3_INTERRUPT_MASK_DISABLE-Werror-Wunused-const-variable | |-- drivers-scsi-linkdata-ps3stor-ps3_irq.c:error:unused-variable-PS3_INTERRUPT_STATUS_EXIST_IRQ-Werror-Wunused-const-variable | |-- drivers-scsi-linkdata-ps3stor-ps3_irq.c:error:unused-variable-PS3_SSD_IOPS_MSIX_VECTORS-Werror-Wunused-const-variable | |-- drivers-scsi-linkdata-ps3stor-ps3_qos.c:error:no-previous-prototype-for-function-ps3_hba_qos_waitq_poll-Werror-Wmissing-prototypes | |-- drivers-scsi-linkdata-ps3stor-ps3_qos.c:error:no-previous-prototype-for-function-ps3_qos_mgrq_resend-Werror-Wmissing-prototypes | |-- drivers-scsi-linkdata-ps3stor-ps3_qos.c:error:no-previous-prototype-for-function-ps3_raid_qos_decision-Werror-Wmissing-prototypes | |-- drivers-scsi-linkdata-ps3stor-ps3_qos.c:error:no-previous-prototype-for-function-ps3_raid_qos_waitq_abort-Werror-Wmissing-prototypes | |-- drivers-scsi-linkdata-ps3stor-ps3_qos.c:error:no-previous-prototype-for-function-ps3_raid_qos_waitq_notify-Werror-Wmissing-prototypes | `-- drivers-scsi-linkdata-ps3stor-ps3_scsih.c:error:unused-function-ps3_scsih_dev_id_get-Werror-Wunused-function |-- x86_64-buildonly-randconfig-001-20250415 | |-- ld.lld:error:version-script-assignment-of-LINUX_2.-to-symbol-__vdso_sgx_enter_enclave-failed:symbol-not-defined | |-- llvm-objcopy:error:arch-x86-entry-vdso-vdso64.so.dbg:No-such-file-or-directory | `-- llvm-objdump:error:arch-x86-entry-vdso-vdso64.so.dbg:No-such-file-or-directory |-- x86_64-buildonly-randconfig-005-20250415 | |-- block-bio.o:warning:objtool:bvec_alloc:unreachable-instruction | |-- block-blk-mq.o:warning:objtool:blk_mq_unquiesce_queue:unreachable-instruction | |-- block-bounce.o:warning:objtool:__bounce_end_io_read:unreachable-instruction | |-- drivers-dma-idxd-perfmon.o:warning:objtool:perfmon_init:unreachable-instruction | |-- drivers-dma-ioat-init.o:warning:objtool:ioat3_dma_probe:unreachable-instruction | |-- drivers-md-dm-verity-target.o:warning:objtool:verity_for_bv_block:unreachable-instruction | |-- io_uring-io_uring.o:warning:objtool:__io_uring_free:unreachable-instruction | |-- mm-memory.o:warning:objtool:remap_pfn_range:unreachable-instruction | |-- mm-mremap.o:warning:objtool:move_pgt_entry:unreachable-instruction | |-- mm-slab_common.o:warning:objtool:kmalloc_slab:unreachable-instruction | `-- net-sched-sch_choke.o:warning:objtool:choke_enqueue:unreachable-instruction |-- x86_64-randconfig-101-20250416 | |-- drivers-nvdimm-namespace_devs.o:warning:objtool:size_store-falls-through-to-next-function-nd_namespace_label_update() | |-- fs-btrfs-free-space-cache.o:warning:objtool:add_bytes_to_bitmap-falls-through-to-next-function-recalculate_thresholds() | |-- fs-btrfs-free-space-cache.o:warning:objtool:btrfs_alloc_from_cluster-falls-through-to-next-function-btrfs_find_space_cluster() | |-- fs-btrfs-free-space-cache.o:warning:objtool:setup_cluster_bitmap-falls-through-to-next-function-btrfs_init_free_cluster() | |-- fs-btrfs-free-space-cache.o:warning:objtool:steal_from_bitmap-falls-through-to-next-function-link_free_space() | |-- fs-btrfs-free-space-tree.o:warning:objtool:modify_free_space_bitmap-falls-through-to-next-function-free_space_test_bit() | |-- fs-btrfs-free-space-tree.o:warning:objtool:update_free_space_extent_count-falls-through-to-next-function-add_new_free_space_info() | |-- fs-ufs-ialloc.o:warning:objtool:ufs_new_inode-falls-through-to-next-function-ufs2_init_inodes_chunk() | |-- fs-ufs-inode.o:warning:objtool:ufs_iget-falls-through-to-next-function-ufs_set_inode_ops() | |-- ld.lld:error:version-script-assignment-of-LINUX_2.-to-symbol-__vdso_sgx_enter_enclave-failed:symbol-not-defined | |-- llvm-objcopy:error:arch-x86-entry-vdso-vdso64.so.dbg:No-such-file-or-directory | `-- llvm-objdump:error:arch-x86-entry-vdso-vdso64.so.dbg:No-such-file-or-directory |-- x86_64-randconfig-103-20250416 | |-- drivers-media-test-drivers-vivid-vivid-kthread-cap.o:warning:objtool:vivid_thread_vid_cap_tick-falls-through-to-next-function-plane_vaddr() | |-- drivers-net-wireless-ath-ath9k-antenna.o:warning:objtool:ath_ant_comb_scan-falls-through-to-next-function-asanmodule_ctor() | |-- ld.lld:error:version-script-assignment-of-LINUX_2.-to-symbol-__vdso_sgx_enter_enclave-failed:symbol-not-defined | |-- llvm-objcopy:error:arch-x86-entry-vdso-vdso64.so.dbg:No-such-file-or-directory | |-- llvm-objdump:error:arch-x86-entry-vdso-vdso64.so.dbg:No-such-file-or-directory | `-- mm-vmscan.o:warning:objtool:do_shrink_slab-falls-through-to-next-function-allow_direct_reclaim() |-- x86_64-randconfig-121-20250415 | `-- drivers-target-target_core_user.o:warning:objtool:queue_cmd_ring-falls-through-to-next-function-scatter_data_area() `-- x86_64-randconfig-r113-20250416 |-- drivers-gpu-drm-amd-amdgpu-dce_v10_0.o:warning:objtool:dce_v10_0_bandwidth_update-falls-through-to-next-function-dce_v10_0_vblank_get_counter() |-- drivers-gpu-drm-amd-amdgpu-dce_v11_0.o:warning:objtool:dce_v11_0_bandwidth_update-falls-through-to-next-function-dce_v11_0_vblank_get_counter() |-- drivers-gpu-drm-amd-amdgpu-dce_v6_0.o:warning:objtool:dce_v6_0_program_watermarks-falls-through-to-next-function-dce_v6_0_latency_watermark() |-- drivers-gpu-drm-amd-amdgpu-dce_v8_0.o:warning:objtool:dce_v8_0_bandwidth_update-falls-through-to-next-function-dce_v8_0_vblank_get_counter() |-- drivers-gpu-drm-radeon-cik.o:warning:objtool:dce8_bandwidth_update-falls-through-to-next-function-cik_get_gpu_clock_counter() |-- drivers-gpu-drm-radeon-evergreen.o:warning:objtool:evergreen_program_watermarks-falls-through-to-next-function-evergreen_mc_wait_for_idle() |-- drivers-gpu-drm-radeon-si.o:warning:objtool:dce6_program_watermarks-falls-through-to-next-function-si_fence_ring_emit() |-- drivers-misc-bh1770glc.o:warning:objtool:bh1770_power_state_store-falls-through-to-next-function-asanmodule_ctor() |-- fs-btrfs-free-space-cache.o:warning:objtool:add_bytes_to_bitmap-falls-through-to-next-function-recalculate_thresholds() |-- fs-btrfs-free-space-cache.o:warning:objtool:btrfs_alloc_from_cluster-falls-through-to-next-function-btrfs_find_space_cluster() |-- fs-btrfs-free-space-cache.o:warning:objtool:setup_cluster_bitmap-falls-through-to-next-function-btrfs_init_free_cluster() |-- fs-btrfs-free-space-cache.o:warning:objtool:steal_from_bitmap-falls-through-to-next-function-link_free_space() |-- fs-btrfs-free-space-tree.o:warning:objtool:modify_free_space_bitmap-falls-through-to-next-function-free_space_test_bit() |-- fs-btrfs-free-space-tree.o:warning:objtool:update_free_space_extent_count-falls-through-to-next-function-add_new_free_space_info() |-- fs-ufs-ialloc.o:warning:objtool:ufs_new_inode-falls-through-to-next-function-ufs2_init_inodes_chunk() |-- fs-ufs-inode.o:warning:objtool:ufs_iget-falls-through-to-next-function-ufs_set_inode_ops() |-- ld.lld:error:version-script-assignment-of-LINUX_2.-to-symbol-__vdso_sgx_enter_enclave-failed:symbol-not-defined |-- llvm-objcopy:error:arch-x86-entry-vdso-vdso64.so.dbg:No-such-file-or-directory |-- llvm-objdump:error:arch-x86-entry-vdso-vdso64.so.dbg:No-such-file-or-directory `-- mm-vmscan.o:warning:objtool:do_shrink_slab-falls-through-to-next-function-allow_direct_reclaim() elapsed time: 1452m configs tested: 16 configs skipped: 128 tested configs: arm64 allmodconfig clang-19 arm64 allnoconfig gcc-14.2.0 arm64 defconfig gcc-14.2.0 arm64 randconfig-001-20250415 clang-16 arm64 randconfig-002-20250415 gcc-7.5.0 arm64 randconfig-003-20250415 gcc-9.5.0 arm64 randconfig-004-20250415 gcc-9.5.0 x86_64 allnoconfig clang-20 x86_64 allyesconfig clang-20 x86_64 buildonly-randconfig-001-20250415 clang-20 x86_64 buildonly-randconfig-002-20250415 gcc-11 x86_64 buildonly-randconfig-003-20250415 gcc-12 x86_64 buildonly-randconfig-004-20250415 clang-20 x86_64 buildonly-randconfig-005-20250415 clang-20 x86_64 buildonly-randconfig-006-20250415 gcc-12 x86_64 defconfig gcc-11 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[PATCH OLK-6.6 0/8] LoongArch: sync internal repository 20250414
by Hongchen Zhang 16 Apr '25

16 Apr '25

Ard Biesheuvel (1): objtool: Fix C jump table annotations for Clang Gao Qihang (1): LoongArch: Preserve firmware configuration if ACPI requires. Hongchen Zhang (1): LoongArch: configs: enable some configs Juxin Gao (1): LoongArch: configs: set CONFIG_UNWINDER_ORC=y Ming Wang (1): LoongArch: configs: Disable CONFIG_RT_GROUP_SCHED to prevent cgroup2 issues Tiezhu Yang (3): LoongArch: Handle fp, lsx, lasx and lbt assembly symbols LoongArch: Make some signal and ptrace functions non-static LoongArch: Export some signal functions arch/loongarch/configs/loongson3_defconfig | 14 ++++++-- arch/loongarch/include/asm/fpu.h | 6 ++++ arch/loongarch/include/asm/lbt.h | 4 +++ arch/loongarch/kernel/Makefile | 1 + arch/loongarch/kernel/extern.c | 31 ++++++++++++++++++ arch/loongarch/kernel/fpu.S | 6 ++++ arch/loongarch/kernel/lbt.S | 4 +++ arch/loongarch/kernel/ptrace.c | 37 +++++++++++++++------- arch/loongarch/kernel/signal.c | 28 +++------------- arch/loongarch/pci/acpi.c | 14 ++++++-- include/linux/compiler.h | 2 +- tools/objtool/check.c | 7 ++-- tools/objtool/include/objtool/special.h | 2 +- 13 files changed, 113 insertions(+), 43 deletions(-) create mode 100644 arch/loongarch/kernel/extern.c -- 2.33.0

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[PATCH OLK-6.6 00/13] Add HPD, getting EDID, colorbar features in DP function
by Yongbang Shi 16 Apr '25

16 Apr '25

To support DP HPD, edid printing, and colorbar display features based on the Hisislcon DP devices. Arnd Bergmann (1): drm/hisilicon/hibmc: select CONFIG_DRM_DISPLAY_DP_HELPER Baihan Li (9): drm/hisilicon/hibmc: Restructuring the header dp_reg.h drm/hisilicon/hibmc: Add dp serdes cfg to adjust serdes rate, voltage and pre-emphasis drm/hisilicon/hibmc: Add dp serdes cfg in dp process drm/hisilicon/hibmc: Refactor the member of drm_aux in struct hibmc_dp drm/hisilicon/hibmc: Getting connector info and EDID by using AUX channel drm/hisilicon/hibmc: Add colorbar-cfg feature and its debugfs file drm/hisilicon/hibmc: Enable this hot plug detect of irq feature drm/hisilicon/hibmc: Add MSI irq getting and requesting for HPD drm/hisilicon/hibmc: Add vga connector detect functions Douglas Anderson (1): drm: Call drm_atomic_helper_shutdown() at shutdown time for misc drivers Thomas Zimmermann (1): drm/ast: Implement polling for VGA and SIL164 connectors Ville Syrjälä (1): drm/sysfs: Register "ddc" symlink later drivers/gpu/drm/drm_connector.c | 9 ++ drivers/gpu/drm/drm_internal.h | 2 + drivers/gpu/drm/drm_probe_helper.c | 29 ++++ drivers/gpu/drm/drm_sysfs.c | 22 ++- drivers/gpu/drm/hisilicon/hibmc/Kconfig | 2 + drivers/gpu/drm/hisilicon/hibmc/Makefile | 3 +- drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c | 16 ++- drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h | 10 +- .../gpu/drm/hisilicon/hibmc/dp/dp_config.h | 2 + drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c | 91 +++++++++++- drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h | 36 +++++ drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.c | 90 +++++++++--- drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h | 130 +++++++++++++----- .../gpu/drm/hisilicon/hibmc/dp/dp_serdes.c | 71 ++++++++++ .../drm/hisilicon/hibmc/hibmc_drm_debugfs.c | 104 ++++++++++++++ .../gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c | 74 +++++++++- .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 91 +++++++++--- .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h | 12 ++ .../gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c | 3 + include/drm/drm_probe_helper.h | 4 + 20 files changed, 702 insertions(+), 99 deletions(-) create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_serdes.c create mode 100644 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_debugfs.c -- 2.33.0

2 14

[PATCH OLK-6.6 0/2] soc cache: Add support for HiSilicon L3 cache
by Yushan Wang 16 Apr '25

16 Apr '25

driver inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IC15TR ---------------------------------------------------------------------- This series adds support for HiSilicon SoC cache lockdown and cache maintenance operations. Cache lockdown feature prevents cache entries from being evicted from L3 cache. It can be enabled by calling mmap function to the file (`/dev/hisi_soc_cache_mgmt`). This feature is implemented in the driver hisi_soc_l3c. Cache maintenance feature, following Arm64's CHI spec[1], enables users to raise certain transactions to the memory residing in the cache. This can be achieved by calling ioctl function to the same file as above. This feature is implemented in the driver hisi_soc_hha. L3 cache and L3 cache PMU share the same memory resource, which makes one fails to probe while another is on board. Since both devices rely on distinct information exported by ACPI, their probing functions should be unrelated. Workaround the resource conflict check by replacing devm_ioremap_resource() to devm_ioremap() instead. [1] https://developer.arm.com/documentation/ihi0050/latest/ Yushan Wang (2): soc cache: Add framework driver for HiSilicon SoC cache soc cache: Support cache maintenance for HiSilicon SoC Hydra Home Agent drivers/soc/hisilicon/Kconfig | 22 + drivers/soc/hisilicon/Makefile | 3 + .../soc/hisilicon/hisi_soc_cache_framework.c | 381 ++++++++++++++++++ .../soc/hisilicon/hisi_soc_cache_framework.h | 77 ++++ drivers/soc/hisilicon/hisi_soc_hha.c | 188 +++++++++ .../uapi/misc/hisi_soc_cache/hisi_soc_cache.h | 35 ++ 6 files changed, 706 insertions(+) create mode 100644 drivers/soc/hisilicon/hisi_soc_cache_framework.c create mode 100644 drivers/soc/hisilicon/hisi_soc_cache_framework.h create mode 100644 drivers/soc/hisilicon/hisi_soc_hha.c create mode 100644 include/uapi/misc/hisi_soc_cache/hisi_soc_cache.h -- 2.33.0

2 3

[PATCH OLK-6.6 0/5] drm: LoongArch: fix rx550/gfx6/gfx7/gfx8 error
by Hongchen Zhang 16 Apr '25

16 Apr '25

Tianrui Zhao (3): drm/amdgpu: Fix pcie order dislocation drm/amdgpu: make duplicated EOP packet for GFX6 have real content drm/amdgpu: Fix RX550 pcie order dislocation. lvjianmin (2): drm/radeon: repeat the same EOP packet for EOP workaround on CIK drm/amdgpu: make duplicated EOP packet for GFX7/8 have real content drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 5 + drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c | 159 ++++++++++++++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h | 6 + drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 4 + drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h | 3 + drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c | 19 +++ drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c | 13 +- drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 13 +- drivers/gpu/drm/radeon/cik.c | 9 +- 9 files changed, 216 insertions(+), 15 deletions(-) -- 2.33.0

2 6

[openeuler:openEuler-1.0-LTS 1571/1571] drivers/usb/typec/tps6598x.o: warning: objtool: tps6598x_probe()+0x1ed: can't find switch jump table
by kernel test robot 16 Apr '25

16 Apr '25

Hi Nikolaus, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: d47443532b562cff105f8cfbc32343f83a2ecd01 commit: 10379cc2b54aefd096d8f00b7e3bd25b3dc6632d [1571/1571] drivers/usb/typec/tps6598x.c: fix portinfo width config: x86_64-buildonly-randconfig-002-20250408 (https://download.01.org/0day-ci/archive/20250416/202504161537.Uan8Cvv1-lkp@…) compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250416/202504161537.Uan8Cvv1-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202504161537.Uan8Cvv1-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/usb/typec/tps6598x.o: warning: objtool: tps6598x_probe()+0x1ed: can't find switch jump table -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

1 0

[PATCH OLK-6.6 0/2] soc cache: Add support for HiSilicon L3 cache
by Yushan Wang 16 Apr '25

16 Apr '25

driver inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IC15TR ---------------------------------------------------------------------- This series adds support for HiSilicon SoC cache lockdown and cache maintenance operations. Cache lockdown feature prevents cache entries from being evicted from L3 cache. It can be enabled by calling mmap function to the file (`/dev/hisi_soc_cache_mgmt`). This feature is implemented in the driver hisi_soc_l3c. Cache maintenance feature, following Arm64's CHI spec[1], enables users to raise certain transactions to the memory residing in the cache. This can be achieved by calling ioctl function to the same file as above. This feature is implemented in the driver hisi_soc_hha. L3 cache and L3 cache PMU share the same memory resource, which makes one fails to probe while another is on board. Since both devices rely on distinct information exported by ACPI, their probing functions should be unrelated. Workaround the resource conflict check by replacing devm_ioremap_resource() to devm_ioremap() instead. [1] https://developer.arm.com/documentation/ihi0050/latest/ Yushan Wang (2): soc cache: Add framework driver for HiSilicon SoC cache soc cache: Support cache maintenance for HiSilicon SoC Hydra Home Agent drivers/soc/hisilicon/Kconfig | 22 + drivers/soc/hisilicon/Makefile | 3 + .../soc/hisilicon/hisi_soc_cache_framework.c | 381 ++++++++++++++++++ .../soc/hisilicon/hisi_soc_cache_framework.h | 77 ++++ drivers/soc/hisilicon/hisi_soc_hha.c | 188 +++++++++ .../uapi/misc/hisi_soc_cache/hisi_soc_cache.h | 35 ++ 6 files changed, 706 insertions(+) create mode 100644 drivers/soc/hisilicon/hisi_soc_cache_framework.c create mode 100644 drivers/soc/hisilicon/hisi_soc_cache_framework.h create mode 100644 drivers/soc/hisilicon/hisi_soc_hha.c create mode 100644 include/uapi/misc/hisi_soc_cache/hisi_soc_cache.h -- 2.33.0

1 2

[PATCH v2 OLK-5.10] iommu/arm-smmu-v3: Fix the extra atc tlb flush
by Zhang Zekun 16 Apr '25

16 Apr '25

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IBZUQU ------------------------------------------- The tlb invalidation code for smmu pagetable prefetch problem might cause a extra tlb invalidation for atc. Prevent it from happening. Fixes: 2da3f6871b6e ("iommu/arm-smmu-v3: Reducing the CMD_SYNC times") Signed-off-by: Zhang Zekun <zhangzekun11(a)huawei.com> --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 7 ++++--- drivers/iommu/io-pgtable-arm.c | 8 +++++--- include/linux/io-pgtable.h | 1 + 3 files changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index cedc1eda7250..090ccda84b46 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2311,9 +2311,7 @@ static void arm_smmu_tlb_inv_walk(unsigned long iova, size_t size, size_t granule, void *cookie) { #ifdef CONFIG_HISILICON_ERRATUM_162100602 - struct arm_smmu_domain *smmu_domain = cookie; - - if (!size && smmu_domain->smmu->options & ARM_SMMU_OPT_SYNC_BATCH) { + if (!size) { arm_smmu_tlb_inv_range_domain(iova, granule, granule, true, cookie); return; } @@ -2584,6 +2582,9 @@ static int arm_smmu_domain_finalise(struct iommu_domain *domain, else if (smmu->features & ARM_SMMU_FEAT_BBML2) pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_ARM_BBML2; + if (smmu->options & ARM_SMMU_OPT_SYNC_BATCH) + pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_HISI_ERRATA; + pgtbl_ops = alloc_io_pgtable_ops(fmt, &pgtbl_cfg, smmu_domain); if (!pgtbl_ops) return -ENOMEM; diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index dc80f2661ff7..a4e75f0e4c23 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -365,7 +365,7 @@ static int __arm_lpae_map(struct arm_lpae_io_pgtable *data, unsigned long iova, if (pte) __arm_lpae_free_pages(cptep, tblsz, cfg); #ifdef CONFIG_HISILICON_ERRATUM_162100602 - if (lvl <= 2) + if (lvl <= 2 && (cfg->quirks & IO_PGTABLE_QUIRK_HISI_ERRATA)) io_pgtable_tlb_flush_walk(&data->iop, iova, 0, ARM_LPAE_GRANULE(data)); #endif } else if (!cfg->coherent_walk && !(pte & ARM_LPAE_PTE_SW_SYNC)) { @@ -1163,7 +1163,8 @@ arm_64_lpae_alloc_pgtable_s1(struct io_pgtable_cfg *cfg, void *cookie) IO_PGTABLE_QUIRK_ARM_TTBR1 | IO_PGTABLE_QUIRK_ARM_HD | IO_PGTABLE_QUIRK_ARM_BBML1 | - IO_PGTABLE_QUIRK_ARM_BBML2)) + IO_PGTABLE_QUIRK_ARM_BBML2 | + IO_PGTABLE_QUIRK_HISI_ERRATA)) return NULL; data = arm_lpae_alloc_pgtable(cfg); @@ -1263,7 +1264,8 @@ arm_64_lpae_alloc_pgtable_s2(struct io_pgtable_cfg *cfg, void *cookie) if (cfg->quirks & ~(IO_PGTABLE_QUIRK_NON_STRICT | IO_PGTABLE_QUIRK_ARM_HD | IO_PGTABLE_QUIRK_ARM_BBML1 | - IO_PGTABLE_QUIRK_ARM_BBML2)) + IO_PGTABLE_QUIRK_ARM_BBML2 | + IO_PGTABLE_QUIRK_HISI_ERRATA)) return NULL; data = arm_lpae_alloc_pgtable(cfg); diff --git a/include/linux/io-pgtable.h b/include/linux/io-pgtable.h index 27b994e42ec4..7fc863011474 100644 --- a/include/linux/io-pgtable.h +++ b/include/linux/io-pgtable.h @@ -100,6 +100,7 @@ struct io_pgtable_cfg { #define IO_PGTABLE_QUIRK_ARM_HD BIT(6) #define IO_PGTABLE_QUIRK_ARM_BBML1 BIT(7) #define IO_PGTABLE_QUIRK_ARM_BBML2 BIT(8) + #define IO_PGTABLE_QUIRK_HISI_ERRATA BIT(9) unsigned long quirks; unsigned long pgsize_bitmap; unsigned int ias; -- 2.22.0

2 1