linux-kernel - WARNING: modpost: vmlinux.o(.text+0xa76d36): Section mismatch in reference from the function rtc_update

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Message-ID: <202205090847.j9NvIYxI-lkp@intel.com>
Date:   Mon, 9 May 2022 08:14:44 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: WARNING: modpost: vmlinux.o(.text+0xa76d36): Section mismatch in
 reference from the function rtc_update_irq() to the variable .init.text:.L0

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c5eb0a61238dd6faf37f58c9ce61c9980aaffd7a
commit: 170f37d6aa6ad4582eefd7459015de79e244536e block: Do not call folio_next() on an unreferenced folio
date:   4 days ago
config: riscv-randconfig-r042-20220509 (https://download.01.org/0day-ci/archive/20220509/202205090847.j9NvIYxI-lkp@intel.com/config)
compiler: riscv32-linux-gcc (GCC) 11.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=170f37d6aa6ad4582eefd7459015de79e244536e
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 170f37d6aa6ad4582eefd7459015de79e244536e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash

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

All warnings (new ones prefixed by >>, old ones prefixed by <<):

>> WARNING: modpost: vmlinux.o(.text+0xa76d36): Section mismatch in reference from the function rtc_update_irq() to the variable .init.text:.L0
The function rtc_update_irq() references
the variable __init .L0 .
This is often because rtc_update_irq lacks a __init
annotation or the annotation of .L0 is wrong.

Note: the below error/warnings can be found in parent commit:
<< WARNING: modpost: vmlinux.o(.text+0xa7418e): Section mismatch in reference from the function rtc_month_days() to the variable .init.setup:__setup_root_delay_setup
<< WARNING: modpost: vmlinux.o(.text+0xb2080e): Section mismatch in reference from the function thermal_zone_device_unregister() to the variable .init.text:.L0
<< WARNING: modpost: vmlinux.o(.text+0xb34ff0): Section mismatch in reference from the function btintel_enter_mfg() to the variable .init.text:.LBB18955
<< WARNING: modpost: vmlinux.o(.text+0xb5964e): Section mismatch in reference from the function cpuidle_switch_governor() to the variable .init.text:.L0
<< WARNING: modpost: vmlinux.o(.text+0xbacbfa): Section mismatch in reference from the function comedi_buf_map_get() to the variable .init.text:.L0
<< WARNING: modpost: vmlinux.o(__ex_table+0x141c): Section mismatch in reference from the variable .L0 to the variable .debug_str:.LASF1100

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp