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    SubjectRe: [PATCH v5 10/22] powerpc/syscall: Use is_compat_task()
    Excerpts from Christophe Leroy's message of February 9, 2021 1:10 am:
    > Instead of hard comparing task flags with _TIF_32BIT, use
    > is_compat_task(). The advantage is that it returns 0 on PPC32
    > allthough _TIF_32BIT is always set.
    >
    > Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>

    Reviewed-by: Nicholas Piggin <npiggin@gmail.com>


    > ---
    > arch/powerpc/kernel/interrupt.c | 4 +++-
    > 1 file changed, 3 insertions(+), 1 deletion(-)
    >
    > diff --git a/arch/powerpc/kernel/interrupt.c b/arch/powerpc/kernel/interrupt.c
    > index 2dac4d2bb1cf..46fd195ca659 100644
    > --- a/arch/powerpc/kernel/interrupt.c
    > +++ b/arch/powerpc/kernel/interrupt.c
    > @@ -2,6 +2,8 @@
    >
    > #include <linux/context_tracking.h>
    > #include <linux/err.h>
    > +#include <linux/compat.h>
    > +
    > #include <asm/asm-prototypes.h>
    > #include <asm/kup.h>
    > #include <asm/cputime.h>
    > @@ -118,7 +120,7 @@ notrace long system_call_exception(long r3, long r4, long r5,
    > /* May be faster to do array_index_nospec? */
    > barrier_nospec();
    >
    > - if (unlikely(is_32bit_task())) {
    > + if (unlikely(is_compat_task())) {
    > f = (void *)compat_sys_call_table[r0];
    >
    > r3 &= 0x00000000ffffffffULL;
    > --
    > 2.25.0
    >
    >

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