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* [linux-next:master 2075/14215] drivers/net/dsa/realtek/realtek-smi.c:496:34: warning: unused variable 'realtek_smi_of_match'
@ 2022-03-23  4:48 kernel test robot
  2022-03-23 12:14   ` Alvin Šipraga
  0 siblings, 1 reply; 3+ messages in thread
From: kernel test robot @ 2022-03-23  4:48 UTC (permalink / raw)
  To: Luiz Angelo Daros de Luca
  Cc: llvm, kbuild-all, Linux Memory Management List, Linus Walleij,
	Alvin Šipraga, Florian Fainelli

Hi Luiz,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   f8833a2b23562be2dae91775127c8014c44d8566
commit: 765c39a4fafe6f7ea0d370aa5f30c811579cf8eb [2075/14215] net: dsa: realtek: convert subdrivers into modules
config: s390-randconfig-r005-20220323 (https://download.01.org/0day-ci/archive/20220323/202203231233.Xx73Y40o-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 902f4708fe1d03b0de7e5315ef875006a6adc319)
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
        # install s390 cross compiling tool for clang build
        # apt-get install binutils-s390x-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=765c39a4fafe6f7ea0d370aa5f30c811579cf8eb
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 765c39a4fafe6f7ea0d370aa5f30c811579cf8eb
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash drivers/net/dsa/realtek/

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

All warnings (new ones prefixed by >>):

   In file included from drivers/net/dsa/realtek/realtek-smi.c:32:
   In file included from include/linux/skbuff.h:31:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __raw_readb(PCI_IOBASE + addr);
                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
   #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
                                                             ^
   include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
   #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
                                                        ^
   In file included from drivers/net/dsa/realtek/realtek-smi.c:32:
   In file included from include/linux/skbuff.h:31:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
   #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
                                                             ^
   include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
   #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
                                                        ^
   In file included from drivers/net/dsa/realtek/realtek-smi.c:32:
   In file included from include/linux/skbuff.h:31:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writeb(value, PCI_IOBASE + addr);
                               ~~~~~~~~~~ ^
   include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsb(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsw(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsl(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesb(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
   include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesw(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
   include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesl(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
>> drivers/net/dsa/realtek/realtek-smi.c:496:34: warning: unused variable 'realtek_smi_of_match' [-Wunused-const-variable]
   static const struct of_device_id realtek_smi_of_match[] = {
                                    ^
   13 warnings generated.


vim +/realtek_smi_of_match +496 drivers/net/dsa/realtek/realtek-smi.c

0650bf52b31ff35 drivers/net/dsa/realtek-smi-core.c    Vladimir Oltean           2021-09-17  495  
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14 @496  static const struct of_device_id realtek_smi_of_match[] = {
765c39a4fafe6f7 drivers/net/dsa/realtek/realtek-smi.c Luiz Angelo Daros de Luca 2022-01-28  497  #if IS_ENABLED(CONFIG_NET_DSA_REALTEK_RTL8366RB)
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  498  	{
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  499  		.compatible = "realtek,rtl8366rb",
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  500  		.data = &rtl8366rb_variant,
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  501  	},
765c39a4fafe6f7 drivers/net/dsa/realtek/realtek-smi.c Luiz Angelo Daros de Luca 2022-01-28  502  #endif
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  503  	{
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  504  		/* FIXME: add support for RTL8366S and more */
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  505  		.compatible = "realtek,rtl8366s",
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  506  		.data = NULL,
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  507  	},
765c39a4fafe6f7 drivers/net/dsa/realtek/realtek-smi.c Luiz Angelo Daros de Luca 2022-01-28  508  #if IS_ENABLED(CONFIG_NET_DSA_REALTEK_RTL8365MB)
4af2950c50c8634 drivers/net/dsa/realtek-smi-core.c    Alvin Šipraga             2021-10-18  509  	{
4af2950c50c8634 drivers/net/dsa/realtek-smi-core.c    Alvin Šipraga             2021-10-18  510  		.compatible = "realtek,rtl8365mb",
4af2950c50c8634 drivers/net/dsa/realtek-smi-core.c    Alvin Šipraga             2021-10-18  511  		.data = &rtl8365mb_variant,
4af2950c50c8634 drivers/net/dsa/realtek-smi-core.c    Alvin Šipraga             2021-10-18  512  	},
765c39a4fafe6f7 drivers/net/dsa/realtek/realtek-smi.c Luiz Angelo Daros de Luca 2022-01-28  513  #endif
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  514  	{ /* sentinel */ },
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  515  };
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  516  MODULE_DEVICE_TABLE(of, realtek_smi_of_match);
d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  517  

:::::: The code at line 496 was first introduced by commit
:::::: d8652956cf37c5caa8c19e0b99ce5ca235c6d5de net: dsa: realtek-smi: Add Realtek SMI driver

:::::: TO: Linus Walleij <linus.walleij@linaro.org>
:::::: CC: David S. Miller <davem@davemloft.net>

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

^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [linux-next:master 2075/14215] drivers/net/dsa/realtek/realtek-smi.c:496:34: warning: unused variable 'realtek_smi_of_match'
  2022-03-23  4:48 [linux-next:master 2075/14215] drivers/net/dsa/realtek/realtek-smi.c:496:34: warning: unused variable 'realtek_smi_of_match' kernel test robot
@ 2022-03-23 12:14   ` Alvin Šipraga
  0 siblings, 0 replies; 3+ messages in thread
From: Alvin Šipraga @ 2022-03-23 12:14 UTC (permalink / raw)
  To: kernel test robot
  Cc: Luiz Angelo Daros de Luca, llvm, kbuild-all,
	Linux Memory Management List, Linus Walleij, Florian Fainelli

Hello test robot,

Thanks for your mail.

On Wed, Mar 23, 2022 at 12:48:28PM +0800, kernel test robot wrote:
> Hi Luiz,
> 
> First bad commit (maybe != root cause):
> 
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   f8833a2b23562be2dae91775127c8014c44d8566
> commit: 765c39a4fafe6f7ea0d370aa5f30c811579cf8eb [2075/14215] net: dsa: realtek: convert subdrivers into modules
> config: s390-randconfig-r005-20220323 (https://download.01.org/0day-ci/archive/20220323/202203231233.Xx73Y40o-lkp@intel.com/config)

Looking at this config...

| # CONFIG_OF is not set

I think this is the problem. I guess something like this should do the
trick:

diff --git a/drivers/net/dsa/realtek/Kconfig b/drivers/net/dsa/realtek/Kconfig
index cd1aa95b7bf0..5ff11dcc512f 100644
--- a/drivers/net/dsa/realtek/Kconfig
+++ b/drivers/net/dsa/realtek/Kconfig
@@ -12,6 +12,7 @@ menuconfig NET_DSA_REALTEK
 config NET_DSA_REALTEK_SMI
        tristate "Realtek SMI connected switch driver"
        depends on NET_DSA_REALTEK
+       depends on OF
        default y
        help
          Select to enable support for registering switches connected

Ditto for realtek-mdio. We are using OF in both drivers.

I'll send a patch.

Kind regards,
Alvin

> >> drivers/net/dsa/realtek/realtek-smi.c:496:34: warning: unused variable 'realtek_smi_of_match' [-Wunused-const-variable]
>    static const struct of_device_id realtek_smi_of_match[] = {
>                                     ^
>    13 warnings generated.
> 
> 
> vim +/realtek_smi_of_match +496 drivers/net/dsa/realtek/realtek-smi.c
> 
> 0650bf52b31ff35 drivers/net/dsa/realtek-smi-core.c    Vladimir Oltean           2021-09-17  495  
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14 @496  static const struct of_device_id realtek_smi_of_match[] = {
> 765c39a4fafe6f7 drivers/net/dsa/realtek/realtek-smi.c Luiz Angelo Daros de Luca 2022-01-28  497  #if IS_ENABLED(CONFIG_NET_DSA_REALTEK_RTL8366RB)
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  498  	{
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  499  		.compatible = "realtek,rtl8366rb",
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  500  		.data = &rtl8366rb_variant,
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  501  	},
> 765c39a4fafe6f7 drivers/net/dsa/realtek/realtek-smi.c Luiz Angelo Daros de Luca 2022-01-28  502  #endif
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  503  	{
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  504  		/* FIXME: add support for RTL8366S and more */
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  505  		.compatible = "realtek,rtl8366s",
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  506  		.data = NULL,
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  507  	},
> 765c39a4fafe6f7 drivers/net/dsa/realtek/realtek-smi.c Luiz Angelo Daros de Luca 2022-01-28  508  #if IS_ENABLED(CONFIG_NET_DSA_REALTEK_RTL8365MB)
> 4af2950c50c8634 drivers/net/dsa/realtek-smi-core.c    Alvin Šipraga             2021-10-18  509  	{
> 4af2950c50c8634 drivers/net/dsa/realtek-smi-core.c    Alvin Šipraga             2021-10-18  510  		.compatible = "realtek,rtl8365mb",
> 4af2950c50c8634 drivers/net/dsa/realtek-smi-core.c    Alvin Šipraga             2021-10-18  511  		.data = &rtl8365mb_variant,
> 4af2950c50c8634 drivers/net/dsa/realtek-smi-core.c    Alvin Šipraga             2021-10-18  512  	},
> 765c39a4fafe6f7 drivers/net/dsa/realtek/realtek-smi.c Luiz Angelo Daros de Luca 2022-01-28  513  #endif
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  514  	{ /* sentinel */ },
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  515  };
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  516  MODULE_DEVICE_TABLE(of, realtek_smi_of_match);
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  517  
> 
> :::::: The code at line 496 was first introduced by commit
> :::::: d8652956cf37c5caa8c19e0b99ce5ca235c6d5de net: dsa: realtek-smi: Add Realtek SMI driver
> 
> :::::: TO: Linus Walleij <linus.walleij@linaro.org>
> :::::: CC: David S. Miller <davem@davemloft.net>
> 
> -- 
> 0-DAY CI Kernel Test Service
> https://01.org/lkp
>

^ permalink raw reply related	[flat|nested] 3+ messages in thread
* Re: [linux-next:master 2075/14215] drivers/net/dsa/realtek/realtek-smi.c:496:34: warning: unused variable 'realtek_smi_of_match'
@ 2022-03-23 12:14   ` Alvin Šipraga
  0 siblings, 0 replies; 3+ messages in thread
From: Alvin Šipraga @ 2022-03-23 12:14 UTC (permalink / raw)
  To: kbuild-all

[-- Attachment #1: Type: text/plain, Size: 4802 bytes --]

Hello test robot,

Thanks for your mail.

On Wed, Mar 23, 2022 at 12:48:28PM +0800, kernel test robot wrote:
> Hi Luiz,
> 
> First bad commit (maybe != root cause):
> 
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   f8833a2b23562be2dae91775127c8014c44d8566
> commit: 765c39a4fafe6f7ea0d370aa5f30c811579cf8eb [2075/14215] net: dsa: realtek: convert subdrivers into modules
> config: s390-randconfig-r005-20220323 (https://download.01.org/0day-ci/archive/20220323/202203231233.Xx73Y40o-lkp(a)intel.com/config)

Looking at this config...

| # CONFIG_OF is not set

I think this is the problem. I guess something like this should do the
trick:

diff --git a/drivers/net/dsa/realtek/Kconfig b/drivers/net/dsa/realtek/Kconfig
index cd1aa95b7bf0..5ff11dcc512f 100644
--- a/drivers/net/dsa/realtek/Kconfig
+++ b/drivers/net/dsa/realtek/Kconfig
@@ -12,6 +12,7 @@ menuconfig NET_DSA_REALTEK
 config NET_DSA_REALTEK_SMI
        tristate "Realtek SMI connected switch driver"
        depends on NET_DSA_REALTEK
+       depends on OF
        default y
        help
          Select to enable support for registering switches connected

Ditto for realtek-mdio. We are using OF in both drivers.

I'll send a patch.

Kind regards,
Alvin

> >> drivers/net/dsa/realtek/realtek-smi.c:496:34: warning: unused variable 'realtek_smi_of_match' [-Wunused-const-variable]
>    static const struct of_device_id realtek_smi_of_match[] = {
>                                     ^
>    13 warnings generated.
> 
> 
> vim +/realtek_smi_of_match +496 drivers/net/dsa/realtek/realtek-smi.c
> 
> 0650bf52b31ff35 drivers/net/dsa/realtek-smi-core.c    Vladimir Oltean           2021-09-17  495  
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14 @496  static const struct of_device_id realtek_smi_of_match[] = {
> 765c39a4fafe6f7 drivers/net/dsa/realtek/realtek-smi.c Luiz Angelo Daros de Luca 2022-01-28  497  #if IS_ENABLED(CONFIG_NET_DSA_REALTEK_RTL8366RB)
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  498  	{
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  499  		.compatible = "realtek,rtl8366rb",
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  500  		.data = &rtl8366rb_variant,
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  501  	},
> 765c39a4fafe6f7 drivers/net/dsa/realtek/realtek-smi.c Luiz Angelo Daros de Luca 2022-01-28  502  #endif
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  503  	{
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  504  		/* FIXME: add support for RTL8366S and more */
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  505  		.compatible = "realtek,rtl8366s",
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  506  		.data = NULL,
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  507  	},
> 765c39a4fafe6f7 drivers/net/dsa/realtek/realtek-smi.c Luiz Angelo Daros de Luca 2022-01-28  508  #if IS_ENABLED(CONFIG_NET_DSA_REALTEK_RTL8365MB)
> 4af2950c50c8634 drivers/net/dsa/realtek-smi-core.c    Alvin Šipraga             2021-10-18  509  	{
> 4af2950c50c8634 drivers/net/dsa/realtek-smi-core.c    Alvin Šipraga             2021-10-18  510  		.compatible = "realtek,rtl8365mb",
> 4af2950c50c8634 drivers/net/dsa/realtek-smi-core.c    Alvin Šipraga             2021-10-18  511  		.data = &rtl8365mb_variant,
> 4af2950c50c8634 drivers/net/dsa/realtek-smi-core.c    Alvin Šipraga             2021-10-18  512  	},
> 765c39a4fafe6f7 drivers/net/dsa/realtek/realtek-smi.c Luiz Angelo Daros de Luca 2022-01-28  513  #endif
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  514  	{ /* sentinel */ },
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  515  };
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  516  MODULE_DEVICE_TABLE(of, realtek_smi_of_match);
> d8652956cf37c5c drivers/net/dsa/realtek-smi.c         Linus Walleij             2018-07-14  517  
> 
> :::::: The code at line 496 was first introduced by commit
> :::::: d8652956cf37c5caa8c19e0b99ce5ca235c6d5de net: dsa: realtek-smi: Add Realtek SMI driver
> 
> :::::: TO: Linus Walleij <linus.walleij@linaro.org>
> :::::: CC: David S. Miller <davem@davemloft.net>
> 
> -- 
> 0-DAY CI Kernel Test Service
> https://01.org/lkp
>

^ permalink raw reply related	[flat|nested] 3+ messages in thread
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2022-03-23  4:48 [linux-next:master 2075/14215] drivers/net/dsa/realtek/realtek-smi.c:496:34: warning: unused variable 'realtek_smi_of_match' kernel test robot
2022-03-23 12:14 ` Alvin Šipraga
2022-03-23 12:14   ` Alvin Šipraga

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