[efi:next 7/7] arch/x86/include/asm/pgtable_types.h:193:27: warning: conversion from 'long long unsigned int' to 'long unsigned int' changes value from '9223372036854776163' to '355'

[kbuild test robot <lkp@xxxxxxxxx>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git next
head:   32904d922174e7ced3d7e68b496545c01c8f32bf
commit: 32904d922174e7ced3d7e68b496545c01c8f32bf [7/7] efi: x86: convert x86 EFI earlyprintk into generic earlycon implementation
config: i386-randconfig-x075-01290405 (attached as .config)
compiler: gcc-8 (Debian 8.2.0-14) 8.2.0
reproduce:
        git checkout 32904d922174e7ced3d7e68b496545c01c8f32bf
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   In file included from arch/x86/include/asm/paravirt_types.h:45,
                    from arch/x86/include/asm/ptrace.h:94,
                    from arch/x86/include/asm/math_emu.h:5,
                    from arch/x86/include/asm/processor.h:12,
                    from arch/x86/include/asm/cpufeature.h:5,
                    from arch/x86/include/asm/thread_info.h:53,
                    from include/linux/thread_info.h:38,
                    from arch/x86/include/asm/preempt.h:7,
                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:51,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:6,
                    from include/linux/mm.h:10,
                    from include/linux/memblock.h:17,
                    from arch/x86//mm/ioremap.c:9:
   arch/x86//mm/ioremap.c: In function 'early_memremap_encrypted':
>> arch/x86/include/asm/pgtable_types.h:193:27: warning: conversion from 'long long unsigned int' to 'long unsigned int' changes value from '9223372036854776163' to '355' [-Woverflow]
    #define __PAGE_KERNEL_ENC (__PAGE_KERNEL | _PAGE_ENC)
                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/x86//mm/ioremap.c:713:46: note: in expansion of macro '__PAGE_KERNEL_ENC'
     return early_memremap_prot(phys_addr, size, __PAGE_KERNEL_ENC);
                                                 ^~~~~~~~~~~~~~~~~
   arch/x86//mm/ioremap.c: In function 'early_memremap_decrypted':
   arch/x86/include/asm/pgtable_types.h:196:29: warning: conversion from 'long long unsigned int' to 'long unsigned int' changes value from '9223372036854776163' to '355' [-Woverflow]
    #define __PAGE_KERNEL_NOENC (__PAGE_KERNEL)
                                ^~~~~~~~~~~~~~~
   arch/x86//mm/ioremap.c:734:46: note: in expansion of macro '__PAGE_KERNEL_NOENC'
     return early_memremap_prot(phys_addr, size, __PAGE_KERNEL_NOENC);
                                                 ^~~~~~~~~~~~~~~~~~~
--
   In file included from arch/x86/include/asm/paravirt_types.h:45,
                    from arch/x86/include/asm/ptrace.h:94,
                    from arch/x86/include/asm/math_emu.h:5,
                    from arch/x86/include/asm/processor.h:12,
                    from arch/x86/include/asm/cpufeature.h:5,
                    from arch/x86/include/asm/thread_info.h:53,
                    from include/linux/thread_info.h:38,
                    from arch/x86/include/asm/preempt.h:7,
                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:51,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:6,
                    from include/linux/mm.h:10,
                    from include/linux/memblock.h:17,
                    from arch/x86/mm/ioremap.c:9:
   arch/x86/mm/ioremap.c: In function 'early_memremap_encrypted':
>> arch/x86/include/asm/pgtable_types.h:193:27: warning: conversion from 'long long unsigned int' to 'long unsigned int' changes value from '9223372036854776163' to '355' [-Woverflow]
    #define __PAGE_KERNEL_ENC (__PAGE_KERNEL | _PAGE_ENC)
                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/x86/mm/ioremap.c:713:46: note: in expansion of macro '__PAGE_KERNEL_ENC'
     return early_memremap_prot(phys_addr, size, __PAGE_KERNEL_ENC);
                                                 ^~~~~~~~~~~~~~~~~
   arch/x86/mm/ioremap.c: In function 'early_memremap_decrypted':
   arch/x86/include/asm/pgtable_types.h:196:29: warning: conversion from 'long long unsigned int' to 'long unsigned int' changes value from '9223372036854776163' to '355' [-Woverflow]
    #define __PAGE_KERNEL_NOENC (__PAGE_KERNEL)
                                ^~~~~~~~~~~~~~~
   arch/x86/mm/ioremap.c:734:46: note: in expansion of macro '__PAGE_KERNEL_NOENC'
     return early_memremap_prot(phys_addr, size, __PAGE_KERNEL_NOENC);
                                                 ^~~~~~~~~~~~~~~~~~~

vim +193 arch/x86/include/asm/pgtable_types.h

21729f81 Tom Lendacky 2017-07-17  192  
f88a68fa Tom Lendacky 2017-07-17 @193  #define __PAGE_KERNEL_ENC	(__PAGE_KERNEL | _PAGE_ENC)
f88a68fa Tom Lendacky 2017-07-17  194  #define __PAGE_KERNEL_ENC_WP	(__PAGE_KERNEL_WP | _PAGE_ENC)
f88a68fa Tom Lendacky 2017-07-17  195  

:::::: The code at line 193 was first introduced by commit
:::::: f88a68facd9a15b94f8c195d9d2c0b30c76c595a x86/mm: Extend early_memremap() support with additional attrs

:::::: TO: Tom Lendacky <thomas.lendacky@xxxxxxx>
:::::: CC: Ingo Molnar <mingo@xxxxxxxxxx>

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