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    Subject[PATCH 3.16 104/254] MIPS: MSA: bugfix - disable MSA correctly for new threads/processes.
    3.16.55-rc1 review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Ralf Baechle <ralf@linux-mips.org>

    commit 9cc719ab3f4f639d629ac8ff09e9b998bc006f68 upstream.

    Due to the slightly odd way that new threads and processes start execution
    when scheduled for the very first time they were bypassing the required
    disable_msa call.

    Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
    Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
    ---
    arch/mips/include/asm/switch_to.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/arch/mips/include/asm/switch_to.h
    +++ b/arch/mips/include/asm/switch_to.h
    @@ -101,7 +101,6 @@ do { \
    if (test_and_clear_tsk_thread_flag(prev, TIF_USEDMSA)) \
    __fpsave = FP_SAVE_VECTOR; \
    (last) = resume(prev, next, task_thread_info(next), __fpsave); \
    - disable_msa(); \
    } while (0)

    #define finish_arch_switch(prev) \
    @@ -119,6 +118,7 @@ do { \
    if (cpu_has_userlocal) \
    write_c0_userlocal(current_thread_info()->tp_value); \
    __restore_watch(); \
    + disable_msa(); \
    } while (0)

    #endif /* _ASM_SWITCH_TO_H */
    \
     
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