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Message-ID: <201801190710.Mm9GzGuQ%fengguang.wu@intel.com>
Date:   Fri, 19 Jan 2018 07:00:12 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Ingo Molnar <mingo@...nel.org>
Subject: drivers/media/usb/ttusb-dec/.tmp_ttusb_dec.o: warning: objtool:
 ttusb_dec_process_urb_frame_list()+0x114: sibling call from callable
 instruction with modified stack frame

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   dda3e15231b35840fe6f0973f803cc70ddb86281
commit: 2a0098d70640dda192a79966c14d449e7a34d675 objtool: Fix seg fault with gold linker
date:   3 days ago
config: x86_64-randconfig-r0-01190349 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
        git checkout 2a0098d70640dda192a79966c14d449e7a34d675
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   Cyclomatic Complexity 5 include/linux/compiler.h:__write_once_size
   Cyclomatic Complexity 2 arch/x86/include/asm/bitops.h:set_bit
   Cyclomatic Complexity 1 arch/x86/include/asm/bitops.h:test_and_set_bit
   Cyclomatic Complexity 1 arch/x86/include/asm/bitops.h:fls64
   Cyclomatic Complexity 1 include/linux/log2.h:__ilog2_u64
   Cyclomatic Complexity 1 include/linux/list.h:INIT_LIST_HEAD
   Cyclomatic Complexity 1 include/linux/list.h:__list_del
   Cyclomatic Complexity 1 include/asm-generic/getorder.h:__get_order
   Cyclomatic Complexity 1 arch/x86/include/asm/paravirt.h:arch_local_save_flags
   Cyclomatic Complexity 1 arch/x86/include/asm/irqflags.h:arch_irqs_disabled_flags
   Cyclomatic Complexity 1 include/linux/spinlock.h:spinlock_check
   Cyclomatic Complexity 1 include/linux/spinlock.h:spin_unlock_irqrestore
   Cyclomatic Complexity 1 include/linux/device.h:dev_get_drvdata
   Cyclomatic Complexity 1 include/linux/device.h:dev_set_drvdata
   Cyclomatic Complexity 1 include/linux/kasan.h:kasan_kmalloc
   Cyclomatic Complexity 28 include/linux/slab.h:kmalloc_index
   Cyclomatic Complexity 1 include/linux/slab.h:kmem_cache_alloc_trace
   Cyclomatic Complexity 1 include/linux/slab.h:kmalloc_order_trace
   Cyclomatic Complexity 68 include/linux/slab.h:kmalloc_large
   Cyclomatic Complexity 5 include/linux/slab.h:kmalloc
   Cyclomatic Complexity 1 include/linux/slab.h:kzalloc
   Cyclomatic Complexity 1 include/linux/dma-debug.h:debug_dma_alloc_coherent
   Cyclomatic Complexity 1 include/linux/dma-debug.h:debug_dma_free_coherent
   Cyclomatic Complexity 1 arch/x86/include/asm/dma-mapping.h:get_arch_dma_ops
   Cyclomatic Complexity 4 include/linux/dma-mapping.h:get_dma_ops
   Cyclomatic Complexity 1 include/linux/usb.h:usb_get_intfdata
   Cyclomatic Complexity 1 include/linux/usb.h:usb_set_intfdata
   Cyclomatic Complexity 2 include/linux/usb.h:usb_fill_int_urb
   Cyclomatic Complexity 1 include/linux/usb.h:__create_pipe
   Cyclomatic Complexity 1 drivers/media/usb/ttusb-dec/ttusb_dec.c:dvb_filter_pes2ts_init
   Cyclomatic Complexity 2 drivers/media/usb/ttusb-dec/ttusb_dec.c:crc16
   Cyclomatic Complexity 1 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_audio_pes2ts_cb
   Cyclomatic Complexity 1 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_video_pes2ts_cb
   Cyclomatic Complexity 2 drivers/media/usb/ttusb-dec/ttusb_dec.c:swap_bytes
   Cyclomatic Complexity 4 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_set_model
   Cyclomatic Complexity 4 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_setup_urbs
   Cyclomatic Complexity 2 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_init_v_pes
   Cyclomatic Complexity 2 include/linux/list.h:__list_del_entry
   Cyclomatic Complexity 1 include/linux/list.h:list_del
   Cyclomatic Complexity 3 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_exit_tasklet
   Cyclomatic Complexity 3 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_exit_filters
   Cyclomatic Complexity 3 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_exit_rc
   Cyclomatic Complexity 4 include/linux/dma-mapping.h:dma_free_attrs
   Cyclomatic Complexity 1 include/linux/dma-mapping.h:dma_free_coherent
   Cyclomatic Complexity 2 include/linux/pci-dma-compat.h:pci_free_consistent
   Cyclomatic Complexity 3 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_free_iso_urbs
   Cyclomatic Complexity 5 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_exit_usb
   Cyclomatic Complexity 4 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_exit_dvb
   Cyclomatic Complexity 4 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_disconnect
   Cyclomatic Complexity 12 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_send_command
   Cyclomatic Complexity 1 drivers/media/usb/ttusb-dec/ttusb_dec.c:fe_send_command
   Cyclomatic Complexity 5 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_stop_iso_xfer
   Cyclomatic Complexity 1 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_stop_ts_feed
   Cyclomatic Complexity 1 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_stop_sec_feed
   Cyclomatic Complexity 4 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_stop_feed
   Cyclomatic Complexity 2 include/linux/usb.h:interface_to_usbdev
   Cyclomatic Complexity 7 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_start_iso_xfer
   Cyclomatic Complexity 1 include/linux/input.h:input_report_key
   Cyclomatic Complexity 1 include/linux/input.h:input_sync
   Cyclomatic Complexity 10 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_handle_irq
   Cyclomatic Complexity 3 include/linux/dma-mapping.h:dma_alloc_attrs
   Cyclomatic Complexity 1 include/linux/dma-mapping.h:dma_alloc_coherent
   Cyclomatic Complexity 1 include/linux/dma-mapping.h:dma_zalloc_coherent
   Cyclomatic Complexity 2 include/linux/pci-dma-compat.h:pci_zalloc_consistent
   Cyclomatic Complexity 6 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_alloc_iso_urbs
   Cyclomatic Complexity 6 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_init_usb
   Cyclomatic Complexity 2 include/linux/list.h:__list_add
   Cyclomatic Complexity 1 include/linux/list.h:list_add_tail
   Cyclomatic Complexity 2 include/linux/interrupt.h:tasklet_schedule
   Cyclomatic Complexity 7 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_process_urb
   Cyclomatic Complexity 7 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_get_stb_state
   Cyclomatic Complexity 11 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_boot_dsp
   Cyclomatic Complexity 10 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_init_stb
   Cyclomatic Complexity 2 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_set_pids
   Cyclomatic Complexity 22 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_start_ts_feed
   Cyclomatic Complexity 5 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_start_sec_feed
   Cyclomatic Complexity 7 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_start_feed
   Cyclomatic Complexity 7 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_init_dvb
   Cyclomatic Complexity 1 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_init_filters
   Cyclomatic Complexity 1 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_init_tasklet
   Cyclomatic Complexity 7 drivers/media/usb/ttusb-dec/ttusb_dec.c:dvb_filter_pes2ts
   Cyclomatic Complexity 14 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_process_pva
   Cyclomatic Complexity 5 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_process_filter
   Cyclomatic Complexity 11 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_process_packet
   Cyclomatic Complexity 23 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_process_urb_frame
   Cyclomatic Complexity 3 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_process_urb_frame_list
   Cyclomatic Complexity 7 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_set_interface
   Cyclomatic Complexity 2 include/linux/usb.h:usb_make_path
   Cyclomatic Complexity 5 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_init_rc
   Cyclomatic Complexity 15 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_probe
   Cyclomatic Complexity 1 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_driver_init
   Cyclomatic Complexity 1 drivers/media/usb/ttusb-dec/ttusb_dec.c:ttusb_dec_driver_exit
>> drivers/media/usb/ttusb-dec/.tmp_ttusb_dec.o: warning: objtool: ttusb_dec_process_urb_frame_list()+0x114: sibling call from callable instruction with modified stack frame

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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