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powerpc: copy_thread don't set PPR in user interrupt frame regs

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syscalls do not set the PPR field in their interrupt frame and
return from syscall always sets the default PPR for userspace,
so setting the value in the ret_from_fork frame is not necessary
and mildly inconsistent. Remove it.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230325122904.2375060-9-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin 2023-03-25 22:29:04 +10:00 committed by Michael Ellerman
parent d195ce4695
commit 89fb39134a
1 changed files with 0 additions and 5 deletions
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5
arch/powerpc/kernel/process.c
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@ -1812,11 +1812,6 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
f = ret_from_fork;
}
#ifdef CONFIG_PPC64
if (cpu_has_feature(CPU_FTR_HAS_PPR))
childregs->ppr = DEFAULT_PPR;
#endif
childregs->msr &= ~(MSR_FP|MSR_VEC|MSR_VSX);
p->thread.regs = childregs;
}