The pkey registers (AMR, IAMR) do not get loaded from the switch frame
so it is pointless to save anything there. Remove the dead code.
Signed-off-by: Nicholas Piggin <npig...@gmail.com>
---
arch/powerpc/kernel/process.c | 12 +-----------
1 file changed, 1 insertion(+), 11 deletions(-)
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index c22cc234672f..ba10505f62c1 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1814,6 +1814,7 @@ int copy_thread(struct task_struct *p, const struct
kernel_clone_args *args)
sp -= STACK_SWITCH_FRAME_SIZE;
((unsigned long *)sp)[0] = sp + STACK_SWITCH_FRAME_SIZE;
kregs = (struct pt_regs *)(sp + STACK_SWITCH_FRAME_REGS);
+ kregs->nip = ppc_function_entry(f);
p->thread.ksp = sp;
#ifdef CONFIG_HAVE_HW_BREAKPOINT
@@ -1846,17 +1847,6 @@ int copy_thread(struct task_struct *p, const struct
kernel_clone_args *args)
p->thread.tidr = 0;
#endif
- /*
- * Run with the current AMR value of the kernel
- */
-#ifdef CONFIG_PPC_PKEY
- if (mmu_has_feature(MMU_FTR_BOOK3S_KUAP))
- kregs->amr = AMR_KUAP_BLOCKED;
-
- if (mmu_has_feature(MMU_FTR_BOOK3S_KUEP))
- kregs->iamr = AMR_KUEP_BLOCKED;
-#endif
- kregs->nip = ppc_function_entry(f);
return 0;
}
--
2.37.2
