[PATCH] Fix build for mips targets

[Dmitry V. Levin]

On Tue, Jan 08, 2019 at 10:15:23PM +0200, Baruch Siach wrote:
> 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

I see, it's mips o32, I don't have such test boxes here.
 
The bug introduced by commit 917c2ccf3a67 is that on mips o32
mips_REG_SP is used in syscall.c before it's defined.

I'll try to prepare a fix.


-- 
ldv
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