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Wed, 23 Apr 2025 10:26:14 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ThreadId: T3e40cc2738116353 Date: Wed, 23 Apr 2025 16:25:54 +0200 From: "Arnd Bergmann" To: "Josh Poimboeuf" , "Peter Zijlstra" Cc: linux-kernel@vger.kernel.org, "Nathan Chancellor" Message-Id: Subject: objtool errors and warnings with clang-21 Content-Type: text/plain Content-Transfer-Encoding: 7bit Here is a list of issues I currently see with linux-next and llvm-21 from https://apt.llvm.org/bookworm, along with the .config files: https://pastebin.com/mRxkgudJ drivers/gpu/drm/vmwgfx/vmwgfx_msg.o: warning: objtool: vmw_host_printf+0xe: unknown CFA base reg 0 make[8]: *** [/home/arnd/arm-soc/scripts/Makefile.build:195: drivers/gpu/drm/vmwgfx/vmwgfx_msg.o] Error 255 https://pastebin.com/7XEcstHP drivers/input/misc/uinput.o: warning: objtool: uinput_str_to_user+0x17f: undefined stack state drivers/input/misc/uinput.o: warning: objtool: uinput_str_to_user+0x17c: unknown CFA base reg -1 make[7]: *** [/home/arnd/arm-soc/scripts/Makefile.build:195: drivers/input/misc/uinput.o] Error 255 https://pastebin.com/6wAzkUL5 vmlinux.o: warning: objtool: ___bpf_prog_run+0x208: sibling call from callable instruction with modified stack frame vmlinux.o: warning: objtool: __ubsan_handle_type_mismatch+0xdb: call to __msan_memset() with UACCESS enabled vmlinux.o: warning: objtool: __ubsan_handle_type_mismatch_v1+0xf8: call to __msan_memset() with UACCESS enabled https://pastebin.com/PQZDZV18 fs/fat/dir.o: warning: objtool: fat_ioctl_filldir+0x717: stack state mismatch: cfa1=4+168 cfa2=4+160 https://pastebin.com/StQRVCfQ sound/soc/codecs/snd-soc-wcd9335.o: warning: objtool: wcd9335_slimbus_irq() falls through to next function __cfi_wcd9335_set_channel_map() and a bunch more fallthrough warnings that are likely all related to that one: drivers/gpu/drm/amd/amdgpu/../display/dc/basics/fixpt31_32.o: warning: objtool: dc_fixpt_recip() falls through to next function __cfi_dc_fixpt_sinc() drivers/gpu/drm/msm/msm.o: warning: objtool: msm_dp_catalog_ctrl_config_msa() falls through to next function msm_dp_catalog_ctrl_set_pattern_state_bit() drivers/iio/imu/bmi160/bmi160_core.o: warning: objtool: bmi160_setup_irq() falls through to next function bmi160_data_rdy_trigger_set_state() drivers/media/i2c/ccs/ccs-core.o: warning: objtool: ccs_set_selection() falls through to next function ccs_propagate() sound/soc/codecs/aw88399.o: warning: objtool: aw_dev_dsp_update_cfg() falls through to next function aw_dev_get_int_status() Arnd