linux-kernel - include/linux/compiler_types.h:82:5: sparse: sparse: undefined preprocessor identifier 'CONFIG_FUNCTION

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Message-ID: <202311080222.eHfQxcpS-lkp@intel.com>
Date:   Wed, 8 Nov 2023 03:12:12 +0800
From:   kernel test robot <lkp@...el.com>
To:     Mark Rutland <mark.rutland@....com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Catalin Marinas <catalin.marinas@....com>
Subject: include/linux/compiler_types.h:82:5: sparse: sparse: undefined
 preprocessor identifier 'CONFIG_FUNCTION_ALIGNMENT'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   be3ca57cfb777ad820c6659d52e60bbdd36bf5ff
commit: c27cd083cfb9d392f304657ed00fcde1136704e7 Compiler attributes: GCC cold function alignment workarounds
date:   10 months ago
config: um-randconfig-r122-20231107 (https://download.01.org/0day-ci/archive/20231108/202311080222.eHfQxcpS-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231108/202311080222.eHfQxcpS-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311080222.eHfQxcpS-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   arch/um/kernel/config.c: note: in included file (through include/linux/compiler_types.h, arch/um/include/shared/init.h):
   include/linux/compiler_attributes.h:55:9: sparse: sparse: preprocessor token __always_inline redefined
   arch/um/kernel/config.c: note: in included file (through /usr/include/features.h, /usr/include/sys/types.h, arch/um/include/shared/user.h, builtin):
   /usr/include/sys/cdefs.h:426:10: sparse: this was the original definition
   arch/um/kernel/config.c: note: in included file (through arch/um/include/shared/init.h):
>> include/linux/compiler_types.h:82:5: sparse: sparse: undefined preprocessor identifier 'CONFIG_FUNCTION_ALIGNMENT'
--
   arch/um/drivers/fd.c: note: in included file (through include/linux/compiler_types.h, arch/um/include/shared/init.h, arch/um/drivers/chan_user.h):
   include/linux/compiler_attributes.h:55:9: sparse: sparse: preprocessor token __always_inline redefined
   arch/um/drivers/fd.c: note: in included file (through /usr/include/features.h, /usr/include/sys/types.h, arch/um/include/shared/user.h, builtin):
   /usr/include/sys/cdefs.h:426:10: sparse: this was the original definition
   arch/um/drivers/fd.c: note: in included file (through arch/um/include/shared/init.h, arch/um/drivers/chan_user.h):
>> include/linux/compiler_types.h:82:5: sparse: sparse: undefined preprocessor identifier 'CONFIG_FUNCTION_ALIGNMENT'
--
   arch/um/drivers/chan_user.c: note: in included file (through include/linux/compiler_types.h, arch/um/include/shared/init.h, arch/um/drivers/chan_user.h):
   include/linux/compiler_attributes.h:55:9: sparse: sparse: preprocessor token __always_inline redefined
   arch/um/drivers/chan_user.c: note: in included file (through /usr/include/features.h, /usr/include/sys/types.h, arch/um/include/shared/user.h, builtin):
   /usr/include/sys/cdefs.h:426:10: sparse: this was the original definition
   arch/um/drivers/chan_user.c: note: in included file (through arch/um/include/shared/init.h, arch/um/drivers/chan_user.h):
>> include/linux/compiler_types.h:82:5: sparse: sparse: undefined preprocessor identifier 'CONFIG_FUNCTION_ALIGNMENT'
--
   arch/um/os-Linux/main.c: note: in included file (through include/linux/compiler_types.h, arch/um/include/shared/init.h):
   include/linux/compiler_attributes.h:55:9: sparse: sparse: preprocessor token __always_inline redefined
   arch/um/os-Linux/main.c: note: in included file (through /usr/include/features.h, /usr/include/sys/types.h, arch/um/include/shared/user.h, builtin):
   /usr/include/sys/cdefs.h:426:10: sparse: this was the original definition
   arch/um/os-Linux/main.c: note: in included file (through arch/um/include/shared/init.h):
>> include/linux/compiler_types.h:82:5: sparse: sparse: undefined preprocessor identifier 'CONFIG_FUNCTION_ALIGNMENT'
   arch/um/os-Linux/main.c:187:6: sparse: sparse: symbol '__wrap_malloc' was not declared. Should it be static?
   arch/um/os-Linux/main.c:208:6: sparse: sparse: symbol '__wrap_calloc' was not declared. Should it be static?
   arch/um/os-Linux/main.c:222:6: sparse: sparse: symbol '__wrap_free' was not declared. Should it be static?
--
   arch/um/os-Linux/mem.c: note: in included file (through include/linux/compiler_types.h, arch/um/include/shared/init.h):
   include/linux/compiler_attributes.h:55:9: sparse: sparse: preprocessor token __always_inline redefined
   arch/um/os-Linux/mem.c: note: in included file (through /usr/include/features.h, /usr/include/sys/types.h, arch/um/include/shared/user.h, builtin):
   /usr/include/sys/cdefs.h:426:10: sparse: this was the original definition
   arch/um/os-Linux/mem.c: note: in included file (through arch/um/include/shared/init.h):
>> include/linux/compiler_types.h:82:5: sparse: sparse: undefined preprocessor identifier 'CONFIG_FUNCTION_ALIGNMENT'
--
   arch/um/os-Linux/process.c: note: in included file (through include/linux/compiler_types.h, arch/um/include/shared/init.h):
   include/linux/compiler_attributes.h:55:9: sparse: sparse: preprocessor token __always_inline redefined
   arch/um/os-Linux/process.c: note: in included file (through /usr/include/features.h, /usr/include/sys/types.h, arch/um/include/shared/user.h, builtin):
   /usr/include/sys/cdefs.h:426:10: sparse: this was the original definition
   arch/um/os-Linux/process.c: note: in included file (through arch/um/include/shared/init.h):
>> include/linux/compiler_types.h:82:5: sparse: sparse: undefined preprocessor identifier 'CONFIG_FUNCTION_ALIGNMENT'
--
   arch/um/os-Linux/sigio.c: note: in included file (through include/linux/compiler_types.h, arch/um/include/shared/init.h):
   include/linux/compiler_attributes.h:55:9: sparse: sparse: preprocessor token __always_inline redefined
   arch/um/os-Linux/sigio.c: note: in included file (through /usr/include/features.h, /usr/include/sys/types.h, arch/um/include/shared/user.h, builtin):
   /usr/include/sys/cdefs.h:426:10: sparse: this was the original definition
   arch/um/os-Linux/sigio.c: note: in included file (through arch/um/include/shared/init.h):
>> include/linux/compiler_types.h:82:5: sparse: sparse: undefined preprocessor identifier 'CONFIG_FUNCTION_ALIGNMENT'
--
   arch/um/os-Linux/start_up.c: note: in included file (through include/linux/compiler_types.h, arch/um/include/shared/init.h):
   include/linux/compiler_attributes.h:55:9: sparse: sparse: preprocessor token __always_inline redefined
   arch/um/os-Linux/start_up.c: note: in included file (through /usr/include/features.h, /usr/include/sys/types.h, arch/um/include/shared/user.h, builtin):
   /usr/include/sys/cdefs.h:426:10: sparse: this was the original definition
   arch/um/os-Linux/start_up.c: note: in included file (through arch/um/include/shared/init.h):
>> include/linux/compiler_types.h:82:5: sparse: sparse: undefined preprocessor identifier 'CONFIG_FUNCTION_ALIGNMENT'
--
   arch/um/os-Linux/umid.c: note: in included file (through include/linux/compiler_types.h, arch/um/include/shared/init.h):
   include/linux/compiler_attributes.h:55:9: sparse: sparse: preprocessor token __always_inline redefined
   arch/um/os-Linux/umid.c: note: in included file (through /usr/include/features.h, /usr/include/sys/types.h, arch/um/include/shared/user.h, builtin):
   /usr/include/sys/cdefs.h:426:10: sparse: this was the original definition
   arch/um/os-Linux/umid.c: note: in included file (through arch/um/include/shared/init.h):
>> include/linux/compiler_types.h:82:5: sparse: sparse: undefined preprocessor identifier 'CONFIG_FUNCTION_ALIGNMENT'
--
   arch/um/os-Linux/util.c: note: in included file (through include/linux/compiler_types.h, arch/um/include/shared/init.h):
   include/linux/compiler_attributes.h:55:9: sparse: sparse: preprocessor token __always_inline redefined
   arch/um/os-Linux/util.c: note: in included file (through /usr/include/features.h, /usr/include/sys/types.h, arch/um/include/shared/user.h, builtin):
   /usr/include/sys/cdefs.h:426:10: sparse: this was the original definition
   arch/um/os-Linux/util.c: note: in included file (through arch/um/include/shared/init.h):
>> include/linux/compiler_types.h:82:5: sparse: sparse: undefined preprocessor identifier 'CONFIG_FUNCTION_ALIGNMENT'
   arch/um/os-Linux/util.c:93:48: sparse: sparse: Using plain integer as NULL pointer
--
   arch/um/os-Linux/skas/mem.c: note: in included file (through include/linux/compiler_types.h, arch/um/include/shared/init.h):
   include/linux/compiler_attributes.h:55:9: sparse: sparse: preprocessor token __always_inline redefined
   arch/um/os-Linux/skas/mem.c: note: in included file (through /usr/include/features.h, /usr/include/sys/types.h, arch/um/include/shared/user.h, builtin):
   /usr/include/sys/cdefs.h:426:10: sparse: this was the original definition
   arch/um/os-Linux/skas/mem.c: note: in included file (through arch/um/include/shared/init.h):
>> include/linux/compiler_types.h:82:5: sparse: sparse: undefined preprocessor identifier 'CONFIG_FUNCTION_ALIGNMENT'
--
   arch/um/os-Linux/skas/process.c: note: in included file (through include/linux/compiler_types.h, arch/um/include/shared/init.h):
   include/linux/compiler_attributes.h:55:9: sparse: sparse: preprocessor token __always_inline redefined
   arch/um/os-Linux/skas/process.c: note: in included file (through /usr/include/features.h, /usr/include/sys/types.h, arch/um/include/shared/user.h, builtin):
   /usr/include/sys/cdefs.h:426:10: sparse: this was the original definition
   arch/um/os-Linux/skas/process.c: note: in included file (through arch/um/include/shared/init.h):
>> include/linux/compiler_types.h:82:5: sparse: sparse: undefined preprocessor identifier 'CONFIG_FUNCTION_ALIGNMENT'
   arch/um/os-Linux/skas/process.c:300:5: sparse: sparse: symbol 'kill_userspace_mm' was not declared. Should it be static?

vim +/CONFIG_FUNCTION_ALIGNMENT +82 include/linux/compiler_types.h

    81	
  > 82	#if CONFIG_FUNCTION_ALIGNMENT > 0
    83	#define __function_aligned		__aligned(CONFIG_FUNCTION_ALIGNMENT)
    84	#else
    85	#define __function_aligned
    86	#endif
    87	

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