[PATCH] Fix build for mips targets

[Baruch Siach]

Hi Dmitry,

Dmitry V. Levin writes:
> On Tue, Jan 08, 2019 at 07:59:36PM +0200, Baruch Siach wrote:
>> Commit 917c2ccf3a67 ("Refactor stack pointers") removed
>> linux/mips/arch_regs.h that defines mips_REG_* macros and struct
>> mips_regs. These symbols are referenced in mips code. Restore
>> arch_regs.h to fix the build failure:
>
> These macros were moved from linux/mips/arch_regs.h to
> linux/mips/arch_regs.c because they are no longer used outside
> syscall.c or files included by syscall.c.
>
>> syscall.c: In function 'decode_syscall_subcall':
>> syscall.c:370:7: error: 'mips_REG_SP' undeclared (first use in this function)
>>        mips_REG_SP + MAX_ARGS * sizeof(tcp->u_arg[0]),
>> 	   ^~~~~~~~~~~
>
> Interesting, I see no build failures on mips,
> you must be doing something unusual.

You can see the full build log at

  http://autobuild.buildroot.net/results/858/8585e75df6462b6d07476a81982e88ec81655c8b/build-end.log

Similar mips build failures are listed at

  http://autobuild.buildroot.net/?reason=strace-4.26

Other failures on that list are fixed in separate patches.

baruch

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