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LoongArch: mm: Introduce unified function populate_kernel_pte()
Function pcpu_populate_pte() and fixmap_pte() are similar, they populate one page from kernel address space. And there is confusion between pgd and p4d in the function fixmap_pte(), such as pgd_none() always returns zero. This patch introduces a unified function populate_kernel_pte() and then replaces pcpu_populate_pte() and fixmap_pte(). Signed-off-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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