Christophe Leroy <christophe.le...@csgroup.eu> writes:
> There is no point in modifying MSR_LE bit on CPUs not supporting
> little endian.
Isn't that an ABI break?
set_endian(PR_ENDIAN_BIG) should work on a big endian CPU, even if it
does nothing useful.
cheers
> diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
> index 185beb290580..b2b9919795a2 100644
> --- a/arch/powerpc/kernel/process.c
> +++ b/arch/powerpc/kernel/process.c
> @@ -1995,6 +1995,10 @@ int set_endian(struct task_struct *tsk, unsigned int
> val)
> {
> struct pt_regs *regs = tsk->thread.regs;
>
> + if (!cpu_has_feature(CPU_FTR_PPC_LE) &&
> + !cpu_has_feature(CPU_FTR_REAL_LE))
> + return -EINVAL;
> +
> if ((val == PR_ENDIAN_LITTLE && !cpu_has_feature(CPU_FTR_REAL_LE)) ||
> (val == PR_ENDIAN_PPC_LITTLE && !cpu_has_feature(CPU_FTR_PPC_LE)))
> return -EINVAL;
> --
> 2.25.0
