Re: [PATCH v5 10/22] powerpc/syscall: Use is_compat_task()
From: Nicholas Piggin <npiggin@gmail.com>
Date: 2021-02-09 01:30:05
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lkml
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 <redacted>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
quoted hunk ↗ jump to hunk
--- 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