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powerpc/syscall: Use is_compat_task()

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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>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c8094662199337a7200fea9f6e1d1f8b1b6d5f69.1612796617.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2021-02-08 15:10:29 +00:00 committed by Michael Ellerman
parent 344bb20b15
commit 72b7a9e56b
1 changed files with 3 additions and 1 deletions
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4
arch/powerpc/kernel/interrupt.c
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@ -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;