linux-kernel - [ammarfaizi2-block:tglx/devel/depthtracking 33/59] arch/x86/kernel/ftrace_64.o: warning: objtool: ftrace

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Message-ID: <202208182339.nUcZuZWV-lkp@intel.com>
Date:   Fri, 19 Aug 2022 00:00:40 +0800
From:   kernel test robot <lkp@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     kbuild-all@...ts.01.org, Ammar Faizi <ammarfaizi2@...weeb.org>,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: [ammarfaizi2-block:tglx/devel/depthtracking 33/59]
 arch/x86/kernel/ftrace_64.o: warning: objtool: ftrace_caller+0x0:
 unreachable instruction

tree:   https://github.com/ammarfaizi2/linux-block tglx/devel/depthtracking
head:   7e7135a8ff18016dde7361f13b02c3d1f63edfdb
commit: 301b621edaa301dc3936a386920008a689ddd988 [33/59] objtool: Fix find_{symbol,func}_containing()
config: x86_64-randconfig-a011 (https://download.01.org/0day-ci/archive/20220818/202208182339.nUcZuZWV-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/ammarfaizi2/linux-block/commit/301b621edaa301dc3936a386920008a689ddd988
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block tglx/devel/depthtracking
        git checkout 301b621edaa301dc3936a386920008a689ddd988
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> arch/x86/kernel/ftrace_64.o: warning: objtool: ftrace_caller+0x0: unreachable instruction


objdump-func vmlinux.o ftrace_caller:
0000 0000000000062370 <ftrace_caller>:
0000    62370:	48 81 ec a8 00 00 00 	sub    $0xa8,%rsp
0007    62377:	48 89 44 24 50       	mov    %rax,0x50(%rsp)
000c    6237c:	48 89 4c 24 58       	mov    %rcx,0x58(%rsp)
0011    62381:	48 89 54 24 60       	mov    %rdx,0x60(%rsp)
0016    62386:	48 89 74 24 68       	mov    %rsi,0x68(%rsp)
001b    6238b:	48 89 7c 24 70       	mov    %rdi,0x70(%rsp)
0020    62390:	4c 89 44 24 48       	mov    %r8,0x48(%rsp)
0025    62395:	4c 89 4c 24 40       	mov    %r9,0x40(%rsp)
002a    6239a:	48 c7 44 24 78 00 00 00 00 	movq   $0x0,0x78(%rsp)
0033    623a3:	48 89 ea             	mov    %rbp,%rdx
0036    623a6:	48 89 54 24 20       	mov    %rdx,0x20(%rsp)
003b    623ab:	48 8b b4 24 b0 00 00 00 	mov    0xb0(%rsp),%rsi
0043    623b3:	48 8b bc 24 a8 00 00 00 	mov    0xa8(%rsp),%rdi
004b    623bb:	48 89 bc 24 80 00 00 00 	mov    %rdi,0x80(%rsp)
0053    623c3:	48 83 ef 05          	sub    $0x5,%rdi
0057    623c7:	48 8d 8c 24 b0 00 00 00 	lea    0xb0(%rsp),%rcx
005f    623cf:	48 89 8c 24 98 00 00 00 	mov    %rcx,0x98(%rsp)

-- 
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https://01.org/lkp