linux-kernel - Re: [kbuild-all] Re: arch/csky/mm/tcm.c:9:2: error: #error "You should define ITCM_RAM

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Date:   Tue, 13 Apr 2021 09:36:20 +0800
From:   Rong Chen <rong.a.chen@...el.com>
To:     Randy Dunlap <rdunlap@...radead.org>,
        kernel test robot <lkp@...el.com>,
        Julian Braha <julianbraha@...il.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Guo Ren <guoren@...nel.org>
Subject: Re: [kbuild-all] Re: arch/csky/mm/tcm.c:9:2: error: #error "You
 should define ITCM_RAM_BASE"



On 4/11/21 1:42 PM, Randy Dunlap wrote:
> On 4/10/21 9:43 PM, kernel test robot wrote:
>> Hi Julian,
>>
>> First bad commit (maybe != root cause):
>>
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head:   52e44129fba5cfc4e351fdb5e45849afc74d9a53
>> commit: 7d37cb2c912dc5c25ffac784a4f9b98c06c6bd08 lib: fix kconfig dependency on ARCH_WANT_FRAME_POINTERS
>> date:   31 hours ago
>> config: csky-randconfig-c003-20210411 (attached as .config)
>> compiler: csky-linux-gcc (GCC) 9.3.0
>> 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=7d37cb2c912dc5c25ffac784a4f9b98c06c6bd08
>>          git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>>          git fetch --no-tags linus master
>>          git checkout 7d37cb2c912dc5c25ffac784a4f9b98c06c6bd08
>>          # save the attached .config to linux build tree
>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=csky
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@...el.com>
>>
>> All errors (new ones prefixed by >>):
>>
>>>> arch/csky/mm/tcm.c:9:2: error: #error "You should define ITCM_RAM_BASE"
>>         9 | #error "You should define ITCM_RAM_BASE"
>>           |  ^~~~~
>>     arch/csky/mm/tcm.c:109:7: warning: no previous prototype for 'tcm_alloc' [-Wmissing-prototypes]
>>       109 | void *tcm_alloc(size_t len)
>>           |       ^~~~~~~~~
>>     arch/csky/mm/tcm.c:124:6: warning: no previous prototype for 'tcm_free' [-Wmissing-prototypes]
>>       124 | void tcm_free(void *addr, size_t len)
>>           |      ^~~~~~~~
>>
>> Kconfig warnings: (for reference only)
>>     WARNING: unmet direct dependencies detected for LOCKDEP
>>     Depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT && (FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86)
>>     Selected by
>>     - LOCK_STAT && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
>>     - DEBUG_LOCK_ALLOC && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
>>
>>
>> vim +9 arch/csky/mm/tcm.c
>>
>> f525bb2c9e7cf1 Guo Ren 2019-11-27   7
>> f525bb2c9e7cf1 Guo Ren 2019-11-27   8  #if (CONFIG_ITCM_RAM_BASE == 0xffffffff)
>> f525bb2c9e7cf1 Guo Ren 2019-11-27  @9  #error "You should define ITCM_RAM_BASE"
>> f525bb2c9e7cf1 Guo Ren 2019-11-27  10  #endif
>> f525bb2c9e7cf1 Guo Ren 2019-11-27  11
>>
>> :::::: The code at line 9 was first introduced by commit
>> :::::: f525bb2c9e7cf1e3c43ab57704c9e1c836d30b34 csky: Tightly-Coupled Memory or Sram support
>>
>> :::::: TO: Guo Ren <guoren@...ux.alibaba.com>
>> :::::: CC: Guo Ren <guoren@...ux.alibaba.com>
>
> Hi ktr/lkp,
>
> Do you have the ability to modify a (rand)config file before doing
> a build?
> To fix this kconfig problem, you can use:
>
> ./scripts/config --set-val ITCM_RAM_BASE 0xe0000000
> or
> ./scripts/config --file csky-randconfig-c003-20210411 --set-val ITCM_RAM_BASE 0xe0000000
> if you want to modify some file other than ".config".
>
> (0xe000000 is an arbitrary value here -- just cannot be 0xffffffff.)
>
> Then run "make oldconfig" and "make all" or however you normally build a kernel.
>
> It looks like the Kconfig file's ITCM_RAM_BASE parameter is expected to be
> set/modified by the user. The default value of 0xffffffff is invalid.
>

Hi Randy,

Thanks for the advice, we'll modify the config files for arch csky.

Best Regards,
Rong Chen