linux-kernel - [lkp-robot] [tools] a45112af2b: stderr.util/symbol.c:#:#:error:implicit_declaration_of_function'rb_erase_init';did_you_mean'rb_erase'?[-Werror=implicit-function-declaration]

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Date:   Fri, 13 Oct 2017 10:03:22 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     David Ahern <dsahern@...il.com>
Cc:     acme@...nel.org, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org, David Ahern <dsahern@...il.com>,
        lkp@...org
Subject: [lkp-robot] [tools]  a45112af2b:
 stderr.util/symbol.c:#:#:error:implicit_declaration_of_function'rb_erase_init';did_you_mean'rb_erase'?[-Werror=implicit-function-declaration]


FYI, we noticed the following commit (built with gcc-6):

commit: a45112af2bdfb51c42a89d181147776b0e4a631e ("tools: Update rbtree files")
url: https://github.com/0day-ci/linux/commits/David-Ahern/tools-Update-rbtree-files/20171001-202148


in testcase: perf-sanity-tests
with following parameters:




on test machine: qemu-system-x86_64 -enable-kvm -cpu kvm64,+ssse3 -smp 2 -m 8G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


[   71.717428] util/symbol.c: In function 'dso__split_kallsyms_for_kcore':
[   71.717434] 
[   71.724793] util/symbol.c:713:3: error: implicit declaration of function 'rb_erase_init'; did you mean 'rb_erase'? [-Werror=implicit-function-declaration]
[   71.724796] 
[   71.737088]    rb_erase_init(&pos->rb_node, &old_root);
[   71.737092] 
[   71.739473]    ^~~~~~~~~~~~~
[   71.739475] 
[   71.757873]    rb_erase
[   71.757888] 
[   71.772929] util/symbol.c:713:3: error: nested extern declaration of 'rb_erase_init' [-Werror=nested-externs]
[   71.772935] 
[   71.858097]   CC       builtin-kmem.o
[   71.858125] 
[   72.905235] cc1: all warnings being treated as errors
[   72.905241] 
[   72.916127] mv: cannot stat 'util/.symbol.o.tmp': No such file or directory
[   72.916131] 
[   72.922305] make[4]: *** [util/symbol.o] Error 1
[   72.922309] 
[   72.925182] make[3]: *** [util] Error 2
[   72.925184] 
[   72.927779] make[2]: *** [libperf-in.o] Error 2
[   72.927781] 
[   72.934104] make[2]: *** Waiting for unfinished jobs....


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Xiaolong

View attachment "config-4.14.0-rc2-00126-ga45112a" of type "text/plain" (108605 bytes)

View attachment "job-script" of type "text/plain" (4414 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (17532 bytes)

View attachment "perf-sanity-tests" of type "text/plain" (7575 bytes)