On 04/16, He Zhe wrote:
>
> --- a/arch/arm64/include/asm/syscall.h
> +++ b/arch/arm64/include/asm/syscall.h
> @@ -44,7 +44,12 @@ static inline long syscall_get_error(struct task_struct
> *task,
> static inline long syscall_get_return_value(struct task_struct *task,
> struct pt_regs *regs)
> {
> - return regs->regs[0];
> + long val = regs->regs[0];
> +
> + if (is_compat_thread(task_thread_info(task)))
> + val = sign_extend64(val, 31);
> +
> + return val;
> }
I can't really review these arm-specific patches, but with this change both
syscall_get_error() and is_syscall_success() can use syscall_get_return_value()
to avoid the code duplication.
Oleg.
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