linux-kernel - vmlinux.o: warning: objtool: ct_idle_enter+0x14: call to ftrace_likely

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Date:   Mon, 20 Feb 2023 11:05:21 +0800
From:   kernel test robot <lkp@...el.com>
To:     Frederic Weisbecker <frederic@...nel.org>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Nicolas Saenz Julienne <nsaenzju@...hat.com>
Subject: vmlinux.o: warning: objtool: ct_idle_enter+0x14: call to
 ftrace_likely_update() leaves .noinstr.text section

Hi Frederic,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c9c3395d5e3dcc6daee66c6908354d47bf98cb0c
commit: c33ef43a359001415032665dfcd433979c462b71 rcu/context-tracking: Remove unused and/or unecessary middle functions
date:   8 months ago
config: x86_64-randconfig-a001-20230220 (https://download.01.org/0day-ci/archive/20230220/202302201112.den9cybf-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c33ef43a359001415032665dfcd433979c462b71
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout c33ef43a359001415032665dfcd433979c462b71
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302201112.den9cybf-lkp@intel.com/

All warnings (new ones prefixed by >>):

   ld: warning: net/bpfilter/bpfilter_umh_blob.o: missing .note.GNU-stack section implies executable stack
   ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   vmlinux.o: warning: objtool: __rdgsbase_inactive+0x34: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: __wrgsbase_inactive+0x39: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: fixup_bad_iret+0x89: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: noist_exc_debug+0x50: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: exc_nmi+0x35: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: poke_int3_handler+0x4b: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_nmi_enter+0x4c: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_nmi_exit+0x53: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: enter_from_user_mode+0x5b: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: syscall_enter_from_user_mode+0x60: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: syscall_enter_from_user_mode_prepare+0x5b: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_enter_from_user_mode+0x5b: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_exit+0x40: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: rcu_dynticks_eqs_enter+0x28: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: rcu_dynticks_eqs_exit+0x28: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: rcu_eqs_exit.constprop.0+0x26: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: rcu_eqs_enter.constprop.0+0x3d: call to ftrace_likely_update() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: ct_idle_enter+0x14: call to ftrace_likely_update() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: ct_nmi_enter+0x36: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: ct_irq_enter+0x38: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: ct_irq_exit+0x38: call to ftrace_likely_update() leaves .noinstr.text section


objdump-func vmlinux.o ct_idle_enter:
0000 000000000000325e <ct_idle_enter>:
0000     325e:	f3 0f 1e fa          	endbr64
0004     3262:	31 d2                	xor    %edx,%edx
0006     3264:	31 f6                	xor    %esi,%esi
0008     3266:	b9 01 00 00 00       	mov    $0x1,%ecx
000d     326b:	48 c7 c7 00 00 00 00 	mov    $0x0,%rdi	326e: R_X86_64_32S	_ftrace_annotated_branch+0x54090
0014     3272:	e8 00 00 00 00       	call   3277 <ct_idle_enter+0x19>	3273: R_X86_64_PLT32	ftrace_likely_update-0x4
0019     3277:	b9 01 00 00 00       	mov    $0x1,%ecx
001e     327c:	31 d2                	xor    %edx,%edx
0020     327e:	31 f6                	xor    %esi,%esi
0022     3280:	48 c7 c7 00 00 00 00 	mov    $0x0,%rdi	3283: R_X86_64_32S	_ftrace_annotated_branch+0x54060
0029     3287:	e8 00 00 00 00       	call   328c <ct_idle_enter+0x2e>	3288: R_X86_64_PLT32	ftrace_likely_update-0x4
002e     328c:	e9 44 fe ff ff       	jmp    30d5 <rcu_eqs_enter.constprop.0>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests