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SubjectRe: syscalls: incompatible types and aliases on i386
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On 06/24/2018 04:51 PM, Randy Dunlap wrote:
> Hi,
>
> I'm seeing lots of this type of warning in 4.18-rc2 (maybe even before,
> but this is on x86_32/i386, so maybe people aren't checking it so much?):
>
> In file included from ../arch/x86/kernel/process_32.c:40:
> ../include/linux/syscalls.h:234:18: warning: 'sys_arch_prctl' alias between functions of incompatible types 'long int(int, long unsigned int)' and 'long int(long int, long int)' [-Wattribute-alias]
> asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
> ^~~
> ../include/linux/syscalls.h:223:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> ^~~~~~~~~~~~~~~~~
> ../include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> #define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
> ^~~~~~~~~~~~~~~
> ../arch/x86/kernel/process_32.c:310:1: note: in expansion of macro 'SYSCALL_DEFINE2'
> SYSCALL_DEFINE2(arch_prctl, int, option, unsigned long, arg2)
> ^~~~~~~~~~~~~~~
> ../include/linux/syscalls.h:239:18: note: aliased declaration here
> asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
> ^~~~~~~~
> ../include/linux/syscalls.h:223:2: note: in expansion of macro '__SYSCALL_DEFINEx'
> __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
> ^~~~~~~~~~~~~~~~~
> ../include/linux/syscalls.h:213:36: note: in expansion of macro 'SYSCALL_DEFINEx'
> #define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
> ^~~~~~~~~~~~~~~
> ../arch/x86/kernel/process_32.c:310:1: note: in expansion of macro 'SYSCALL_DEFINE2'
> SYSCALL_DEFINE2(arch_prctl, int, option, unsigned long, arg2)
> ^~~~~~~~~~~~~~~
>
>
>
> I see around 300 of these.
> Using: gcc (SUSE Linux) 8.1.1 20180523 [gcc-8-branch revision 260570]
>
> Is there a patch for this?

Found it.

thnx,
--
~Randy

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