arm64: tlb: remove redundant barrier from __flush_tlb_pgtable
__flush_tlb_pgtable is used to invalidate intermediate page table entries after they have been cleared and are about to be freed. Since pXd_clear imply memory barriers, we don't need the extra one here. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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