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With hash we update the bolted pte to mark it read-only. We rely on the MMU_FTR_KERNEL_RO to generate the correct permissions for read-only text. The radix implementation just prints a warning in this implementation Signed-off-by: Balbir Singh <bsingharora@gmail.com> [mpe: Make the warning louder when we don't have MMU_FTR_KERNEL_RO] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>