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Subject[RFC PATCH v2 07/13] powerpc/syscall: Use is_compat_task()
Date
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@c-s.fr>
---
arch/powerpc/kernel/syscall.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/syscall.c b/arch/powerpc/kernel/syscall.c
index 28bd43db8755..4674cfd2916d 100644
--- a/arch/powerpc/kernel/syscall.c
+++ b/arch/powerpc/kernel/syscall.c
@@ -1,6 +1,8 @@
// SPDX-License-Identifier: GPL-2.0-or-later

#include <linux/err.h>
+#include <linux/compat.h>
+
#include <asm/asm-prototypes.h>
#include <asm/kup.h>
#include <asm/cputime.h>
@@ -92,7 +94,7 @@ notrace long system_call_exception(long r3, long r4, long r5,
/* May be faster to do array_index_nospec? */
barrier_nospec();

- if (unlikely(ti_flags & _TIF_32BIT)) {
+ if (is_compat_task()) {
f = (void *)compat_sys_call_table[r0];

r3 &= 0x00000000ffffffffULL;
--
2.25.0
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