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* arch/powerpc/platforms/83xx/suspend.c:210:3: error: call to undeclared function 'enable_kernel_fp'; ISO C99 and later do not support implicit function declarations
@ 2023-02-18  6:21 kernel test robot
  2023-02-19  7:13 ` Randy Dunlap
  0 siblings, 1 reply; 3+ messages in thread
From: kernel test robot @ 2023-02-18  6:21 UTC (permalink / raw)
  To: Arnd Bergmann
  Cc: llvm, oe-kbuild-all, linux-kernel, Masahiro Yamada, Alex Shi,
	Nick Desaulniers, Miguel Ojeda, Nathan Chancellor

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   38f8ccde04a3fa317b51b05e63c3cb57e1641931
commit: e8c07082a810fbb9db303a2b66b66b8d7e588b53 Kbuild: move to -std=gnu11
date:   11 months ago
config: powerpc-randconfig-r013-20230218 (https://download.01.org/0day-ci/archive/20230218/202302181414.nAdxC08J-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
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 powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e8c07082a810fbb9db303a2b66b66b8d7e588b53
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout e8c07082a810fbb9db303a2b66b66b8d7e588b53
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/platforms/83xx/ drivers/android/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302181414.nAdxC08J-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/powerpc/platforms/83xx/suspend.c:210:3: error: call to undeclared function 'enable_kernel_fp'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
                   enable_kernel_fp();
                   ^
   arch/powerpc/platforms/83xx/suspend.c:210:3: note: did you mean 'enable_kernel_vsx'?
   arch/powerpc/include/asm/switch_to.h:75:20: note: 'enable_kernel_vsx' declared here
   static inline void enable_kernel_vsx(void)
                      ^
   1 error generated.


vim +/enable_kernel_fp +210 arch/powerpc/platforms/83xx/suspend.c

87faaabb09d080 Anton Vorontsov 2009-12-10  173  
d49747bdfb2dde Scott Wood      2007-10-09  174  static int mpc83xx_suspend_enter(suspend_state_t state)
d49747bdfb2dde Scott Wood      2007-10-09  175  {
d49747bdfb2dde Scott Wood      2007-10-09  176  	int ret = -EAGAIN;
d49747bdfb2dde Scott Wood      2007-10-09  177  
d49747bdfb2dde Scott Wood      2007-10-09  178  	/* Don't go to sleep if there's a race where pci_pm_state changes
d49747bdfb2dde Scott Wood      2007-10-09  179  	 * between the agent thread checking it and the PM code disabling
d49747bdfb2dde Scott Wood      2007-10-09  180  	 * interrupts.
d49747bdfb2dde Scott Wood      2007-10-09  181  	 */
d49747bdfb2dde Scott Wood      2007-10-09  182  	if (wake_from_pci) {
d49747bdfb2dde Scott Wood      2007-10-09  183  		if (pci_pm_state != (deep_sleeping ? 3 : 2))
d49747bdfb2dde Scott Wood      2007-10-09  184  			goto out;
d49747bdfb2dde Scott Wood      2007-10-09  185  
d49747bdfb2dde Scott Wood      2007-10-09  186  		out_be32(&pmc_regs->config1,
d49747bdfb2dde Scott Wood      2007-10-09  187  		         in_be32(&pmc_regs->config1) | PMCCR1_PME_EN);
d49747bdfb2dde Scott Wood      2007-10-09  188  	}
d49747bdfb2dde Scott Wood      2007-10-09  189  
d49747bdfb2dde Scott Wood      2007-10-09  190  	/* Put the system into low-power mode and the RAM
d49747bdfb2dde Scott Wood      2007-10-09  191  	 * into self-refresh mode once the core goes to
d49747bdfb2dde Scott Wood      2007-10-09  192  	 * sleep.
d49747bdfb2dde Scott Wood      2007-10-09  193  	 */
d49747bdfb2dde Scott Wood      2007-10-09  194  
d49747bdfb2dde Scott Wood      2007-10-09  195  	out_be32(&pmc_regs->config, PMCCR_SLPEN | PMCCR_DLPEN);
d49747bdfb2dde Scott Wood      2007-10-09  196  
d49747bdfb2dde Scott Wood      2007-10-09  197  	/* If it has deep sleep (i.e. it's an 831x or compatible),
d49747bdfb2dde Scott Wood      2007-10-09  198  	 * disable power to the core upon entering sleep mode.  This will
d49747bdfb2dde Scott Wood      2007-10-09  199  	 * require going through the boot firmware upon a wakeup event.
d49747bdfb2dde Scott Wood      2007-10-09  200  	 */
d49747bdfb2dde Scott Wood      2007-10-09  201  
d49747bdfb2dde Scott Wood      2007-10-09  202  	if (deep_sleeping) {
87faaabb09d080 Anton Vorontsov 2009-12-10  203  		mpc83xx_suspend_save_regs();
87faaabb09d080 Anton Vorontsov 2009-12-10  204  
d49747bdfb2dde Scott Wood      2007-10-09  205  		out_be32(&pmc_regs->mask, PMCER_ALL);
d49747bdfb2dde Scott Wood      2007-10-09  206  
d49747bdfb2dde Scott Wood      2007-10-09  207  		out_be32(&pmc_regs->config1,
d49747bdfb2dde Scott Wood      2007-10-09  208  		         in_be32(&pmc_regs->config1) | PMCCR1_POWER_OFF);
d49747bdfb2dde Scott Wood      2007-10-09  209  
d49747bdfb2dde Scott Wood      2007-10-09 @210  		enable_kernel_fp();
d49747bdfb2dde Scott Wood      2007-10-09  211  
d49747bdfb2dde Scott Wood      2007-10-09  212  		mpc83xx_enter_deep_sleep(immrbase);
d49747bdfb2dde Scott Wood      2007-10-09  213  
d49747bdfb2dde Scott Wood      2007-10-09  214  		out_be32(&pmc_regs->config1,
d49747bdfb2dde Scott Wood      2007-10-09  215  		         in_be32(&pmc_regs->config1) & ~PMCCR1_POWER_OFF);
d49747bdfb2dde Scott Wood      2007-10-09  216  
d49747bdfb2dde Scott Wood      2007-10-09  217  		out_be32(&pmc_regs->mask, PMCER_PMCI);
87faaabb09d080 Anton Vorontsov 2009-12-10  218  
87faaabb09d080 Anton Vorontsov 2009-12-10  219  		mpc83xx_suspend_restore_regs();
d49747bdfb2dde Scott Wood      2007-10-09  220  	} else {
d49747bdfb2dde Scott Wood      2007-10-09  221  		out_be32(&pmc_regs->mask, PMCER_PMCI);
d49747bdfb2dde Scott Wood      2007-10-09  222  
d49747bdfb2dde Scott Wood      2007-10-09  223  		mpc6xx_enter_standby();
d49747bdfb2dde Scott Wood      2007-10-09  224  	}
d49747bdfb2dde Scott Wood      2007-10-09  225  
d49747bdfb2dde Scott Wood      2007-10-09  226  	ret = 0;
d49747bdfb2dde Scott Wood      2007-10-09  227  
d49747bdfb2dde Scott Wood      2007-10-09  228  out:
d49747bdfb2dde Scott Wood      2007-10-09  229  	out_be32(&pmc_regs->config1,
d49747bdfb2dde Scott Wood      2007-10-09  230  	         in_be32(&pmc_regs->config1) & ~PMCCR1_PME_EN);
d49747bdfb2dde Scott Wood      2007-10-09  231  
d49747bdfb2dde Scott Wood      2007-10-09  232  	return ret;
d49747bdfb2dde Scott Wood      2007-10-09  233  }
d49747bdfb2dde Scott Wood      2007-10-09  234  

:::::: The code at line 210 was first introduced by commit
:::::: d49747bdfb2ddebea24d1580da55b79d093d48a9 powerpc/mpc83xx: Power Management support

:::::: TO: Scott Wood <scottwood@freescale.com>
:::::: CC: Kumar Gala <galak@kernel.crashing.org>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: arch/powerpc/platforms/83xx/suspend.c:210:3: error: call to undeclared function 'enable_kernel_fp'; ISO C99 and later do not support implicit function declarations
  2023-02-18  6:21 arch/powerpc/platforms/83xx/suspend.c:210:3: error: call to undeclared function 'enable_kernel_fp'; ISO C99 and later do not support implicit function declarations kernel test robot
@ 2023-02-19  7:13 ` Randy Dunlap
  2023-03-20  8:19   ` Christophe Leroy
  0 siblings, 1 reply; 3+ messages in thread
From: Randy Dunlap @ 2023-02-19  7:13 UTC (permalink / raw)
  To: kernel test robot, Arnd Bergmann, Christophe Leroy
  Cc: llvm, oe-kbuild-all, linux-kernel, Masahiro Yamada, Alex Shi,
	Nick Desaulniers, Miguel Ojeda, Nathan Chancellor,
	Michael Ellerman

Hi Christophe,

On 2/17/23 22:21, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   38f8ccde04a3fa317b51b05e63c3cb57e1641931
> commit: e8c07082a810fbb9db303a2b66b66b8d7e588b53 Kbuild: move to -std=gnu11
> date:   11 months ago
> config: powerpc-randconfig-r013-20230218 (https://download.01.org/0day-ci/archive/20230218/202302181414.nAdxC08J-lkp@intel.com/config)
> compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
> 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 powerpc cross compiling tool for clang build
>         # apt-get install binutils-powerpc-linux-gnu
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e8c07082a810fbb9db303a2b66b66b8d7e588b53
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout e8c07082a810fbb9db303a2b66b66b8d7e588b53
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/platforms/83xx/ drivers/android/
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@intel.com>
> | Link: https://lore.kernel.org/oe-kbuild-all/202302181414.nAdxC08J-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>>> arch/powerpc/platforms/83xx/suspend.c:210:3: error: call to undeclared function 'enable_kernel_fp'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>                    enable_kernel_fp();
>                    ^
>    arch/powerpc/platforms/83xx/suspend.c:210:3: note: did you mean 'enable_kernel_vsx'?
>    arch/powerpc/include/asm/switch_to.h:75:20: note: 'enable_kernel_vsx' declared here
>    static inline void enable_kernel_vsx(void)
>                       ^
>    1 error generated.
> 

When # CONFIG_PPC_FPU is not set, enable_kernel_fp() is not defined.
Looks to me like it is caused by:

commit 7d68c8916950
Author: Christophe Leroy <christophe.leroy@csgroup.eu>
Date:   Tue Aug 18 17:19:18 2020 +0000

    powerpc/32s: Allow deselecting CONFIG_PPC_FPU on mpc832x

Adding a stub for enable_kernel_fp() in include/asm/switch_to.h
makes this problem disappear. (There is still a different build error.)

Ideas?

Thanks.


> 
> vim +/enable_kernel_fp +210 arch/powerpc/platforms/83xx/suspend.c
> 
> 87faaabb09d080 Anton Vorontsov 2009-12-10  173  
> d49747bdfb2dde Scott Wood      2007-10-09  174  static int mpc83xx_suspend_enter(suspend_state_t state)
> d49747bdfb2dde Scott Wood      2007-10-09  175  {
> d49747bdfb2dde Scott Wood      2007-10-09  176  	int ret = -EAGAIN;
> d49747bdfb2dde Scott Wood      2007-10-09  177  
> d49747bdfb2dde Scott Wood      2007-10-09  178  	/* Don't go to sleep if there's a race where pci_pm_state changes
> d49747bdfb2dde Scott Wood      2007-10-09  179  	 * between the agent thread checking it and the PM code disabling
> d49747bdfb2dde Scott Wood      2007-10-09  180  	 * interrupts.
> d49747bdfb2dde Scott Wood      2007-10-09  181  	 */
> d49747bdfb2dde Scott Wood      2007-10-09  182  	if (wake_from_pci) {
> d49747bdfb2dde Scott Wood      2007-10-09  183  		if (pci_pm_state != (deep_sleeping ? 3 : 2))
> d49747bdfb2dde Scott Wood      2007-10-09  184  			goto out;
> d49747bdfb2dde Scott Wood      2007-10-09  185  
> d49747bdfb2dde Scott Wood      2007-10-09  186  		out_be32(&pmc_regs->config1,
> d49747bdfb2dde Scott Wood      2007-10-09  187  		         in_be32(&pmc_regs->config1) | PMCCR1_PME_EN);
> d49747bdfb2dde Scott Wood      2007-10-09  188  	}
> d49747bdfb2dde Scott Wood      2007-10-09  189  
> d49747bdfb2dde Scott Wood      2007-10-09  190  	/* Put the system into low-power mode and the RAM
> d49747bdfb2dde Scott Wood      2007-10-09  191  	 * into self-refresh mode once the core goes to
> d49747bdfb2dde Scott Wood      2007-10-09  192  	 * sleep.
> d49747bdfb2dde Scott Wood      2007-10-09  193  	 */
> d49747bdfb2dde Scott Wood      2007-10-09  194  
> d49747bdfb2dde Scott Wood      2007-10-09  195  	out_be32(&pmc_regs->config, PMCCR_SLPEN | PMCCR_DLPEN);
> d49747bdfb2dde Scott Wood      2007-10-09  196  
> d49747bdfb2dde Scott Wood      2007-10-09  197  	/* If it has deep sleep (i.e. it's an 831x or compatible),
> d49747bdfb2dde Scott Wood      2007-10-09  198  	 * disable power to the core upon entering sleep mode.  This will
> d49747bdfb2dde Scott Wood      2007-10-09  199  	 * require going through the boot firmware upon a wakeup event.
> d49747bdfb2dde Scott Wood      2007-10-09  200  	 */
> d49747bdfb2dde Scott Wood      2007-10-09  201  
> d49747bdfb2dde Scott Wood      2007-10-09  202  	if (deep_sleeping) {
> 87faaabb09d080 Anton Vorontsov 2009-12-10  203  		mpc83xx_suspend_save_regs();
> 87faaabb09d080 Anton Vorontsov 2009-12-10  204  
> d49747bdfb2dde Scott Wood      2007-10-09  205  		out_be32(&pmc_regs->mask, PMCER_ALL);
> d49747bdfb2dde Scott Wood      2007-10-09  206  
> d49747bdfb2dde Scott Wood      2007-10-09  207  		out_be32(&pmc_regs->config1,
> d49747bdfb2dde Scott Wood      2007-10-09  208  		         in_be32(&pmc_regs->config1) | PMCCR1_POWER_OFF);
> d49747bdfb2dde Scott Wood      2007-10-09  209  
> d49747bdfb2dde Scott Wood      2007-10-09 @210  		enable_kernel_fp();
> d49747bdfb2dde Scott Wood      2007-10-09  211  
> d49747bdfb2dde Scott Wood      2007-10-09  212  		mpc83xx_enter_deep_sleep(immrbase);
> d49747bdfb2dde Scott Wood      2007-10-09  213  
> d49747bdfb2dde Scott Wood      2007-10-09  214  		out_be32(&pmc_regs->config1,
> d49747bdfb2dde Scott Wood      2007-10-09  215  		         in_be32(&pmc_regs->config1) & ~PMCCR1_POWER_OFF);
> d49747bdfb2dde Scott Wood      2007-10-09  216  
> d49747bdfb2dde Scott Wood      2007-10-09  217  		out_be32(&pmc_regs->mask, PMCER_PMCI);
> 87faaabb09d080 Anton Vorontsov 2009-12-10  218  
> 87faaabb09d080 Anton Vorontsov 2009-12-10  219  		mpc83xx_suspend_restore_regs();
> d49747bdfb2dde Scott Wood      2007-10-09  220  	} else {
> d49747bdfb2dde Scott Wood      2007-10-09  221  		out_be32(&pmc_regs->mask, PMCER_PMCI);
> d49747bdfb2dde Scott Wood      2007-10-09  222  
> d49747bdfb2dde Scott Wood      2007-10-09  223  		mpc6xx_enter_standby();
> d49747bdfb2dde Scott Wood      2007-10-09  224  	}
> d49747bdfb2dde Scott Wood      2007-10-09  225  
> d49747bdfb2dde Scott Wood      2007-10-09  226  	ret = 0;
> d49747bdfb2dde Scott Wood      2007-10-09  227  
> d49747bdfb2dde Scott Wood      2007-10-09  228  out:
> d49747bdfb2dde Scott Wood      2007-10-09  229  	out_be32(&pmc_regs->config1,
> d49747bdfb2dde Scott Wood      2007-10-09  230  	         in_be32(&pmc_regs->config1) & ~PMCCR1_PME_EN);
> d49747bdfb2dde Scott Wood      2007-10-09  231  
> d49747bdfb2dde Scott Wood      2007-10-09  232  	return ret;
> d49747bdfb2dde Scott Wood      2007-10-09  233  }
> d49747bdfb2dde Scott Wood      2007-10-09  234  
> 
> :::::: The code at line 210 was first introduced by commit
> :::::: d49747bdfb2ddebea24d1580da55b79d093d48a9 powerpc/mpc83xx: Power Management support
> 
> :::::: TO: Scott Wood <scottwood@freescale.com>
> :::::: CC: Kumar Gala <galak@kernel.crashing.org>
> 

-- 
~Randy

^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: arch/powerpc/platforms/83xx/suspend.c:210:3: error: call to undeclared function 'enable_kernel_fp'; ISO C99 and later do not support implicit function declarations
  2023-02-19  7:13 ` Randy Dunlap
@ 2023-03-20  8:19   ` Christophe Leroy
  0 siblings, 0 replies; 3+ messages in thread
From: Christophe Leroy @ 2023-03-20  8:19 UTC (permalink / raw)
  To: Randy Dunlap, kernel test robot, Arnd Bergmann
  Cc: llvm, oe-kbuild-all, linux-kernel, Masahiro Yamada, Alex Shi,
	Nick Desaulniers, Miguel Ojeda, Nathan Chancellor,
	Michael Ellerman

Hi Randy,

Le 19/02/2023 à 08:13, Randy Dunlap a écrit :
> Hi Christophe,
> 
> On 2/17/23 22:21, kernel test robot wrote:
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head:   38f8ccde04a3fa317b51b05e63c3cb57e1641931
>> commit: e8c07082a810fbb9db303a2b66b66b8d7e588b53 Kbuild: move to -std=gnu11
>> date:   11 months ago
>> config: powerpc-randconfig-r013-20230218 (https://download.01.org/0day-ci/archive/20230218/202302181414.nAdxC08J-lkp@intel.com/config)
>> compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
>> 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 powerpc cross compiling tool for clang build
>>          # apt-get install binutils-powerpc-linux-gnu
>>          # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e8c07082a810fbb9db303a2b66b66b8d7e588b53
>>          git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>>          git fetch --no-tags linus master
>>          git checkout e8c07082a810fbb9db303a2b66b66b8d7e588b53
>>          # save the config file
>>          mkdir build_dir && cp config build_dir/.config
>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/platforms/83xx/ drivers/android/
>>
>> If you fix the issue, kindly add following tag where applicable
>> | Reported-by: kernel test robot <lkp@intel.com>
>> | Link: https://lore.kernel.org/oe-kbuild-all/202302181414.nAdxC08J-lkp@intel.com/
>>
>> All errors (new ones prefixed by >>):
>>
>>>> arch/powerpc/platforms/83xx/suspend.c:210:3: error: call to undeclared function 'enable_kernel_fp'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>>                     enable_kernel_fp();
>>                     ^
>>     arch/powerpc/platforms/83xx/suspend.c:210:3: note: did you mean 'enable_kernel_vsx'?
>>     arch/powerpc/include/asm/switch_to.h:75:20: note: 'enable_kernel_vsx' declared here
>>     static inline void enable_kernel_vsx(void)
>>                        ^
>>     1 error generated.
>>
> 
> When # CONFIG_PPC_FPU is not set, enable_kernel_fp() is not defined.
> Looks to me like it is caused by:
> 
> commit 7d68c8916950
> Author: Christophe Leroy <christophe.leroy@csgroup.eu>
> Date:   Tue Aug 18 17:19:18 2020 +0000
> 
>      powerpc/32s: Allow deselecting CONFIG_PPC_FPU on mpc832x
> 
> Adding a stub for enable_kernel_fp() in include/asm/switch_to.h
> makes this problem disappear. (There is still a different build error.)
> 
> Ideas?
> 

I think it should be handled like ALTIVEC.

I will have a look at it.

Christophe

^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-03-20  8:19 UTC | newest]

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2023-02-18  6:21 arch/powerpc/platforms/83xx/suspend.c:210:3: error: call to undeclared function 'enable_kernel_fp'; ISO C99 and later do not support implicit function declarations kernel test robot
2023-02-19  7:13 ` Randy Dunlap
2023-03-20  8:19   ` Christophe Leroy

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