[PATCH-V2 1/1] sparc: Fix context switch on SMP

[Sebastian Huber]

On 16/11/15 11:06, Daniel Cederman wrote:
> @@ -202,6 +193,13 @@ try_update_is_executing:
>           ! The next load is in a delay slot, which is all right
>   #endif
>   
> +        ld      [%o1 + PSR_OFFSET], %g1       ! g1 = heir psr
> +        andn    %g1, SPARC_PSR_CWP_MASK, %g1  ! g1 = heir psr w/o cwp
> +        or      %g1, %g3, %g1                 ! g1 = heir psr with cwp
> +        or      %g1, SPARC_PSR_ET_MASK, %g1   ! g1 = heir psr traps enabled

Do we really need the "or      %g1, SPARC_PSR_ET_MASK, %g1"? I think we 
should simply use the value of the saved PSR and omit this step.

> +        mov     %g1, %psr                     ! restore status register and
> +                                              ! **** ENABLE TRAPS ****
> +
>           ld      [%o1 + G5_OFFSET], %g5        ! restore the global registers
>           ld      [%o1 + G7_OFFSET], %g7

-- 
Sebastian Huber, embedded brains GmbH

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