enable wifi gpio

hc

2023-11-07 f45e756958099c35d6afb746df1d40a1c6302cfc

 kernel/arch/x86/mm/highmem_32.c
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@@ -32,10 +32,11 @@
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  */
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 void *kmap_atomic_prot(struct page *page, pgprot_t prot)
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 {
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+	pte_t pte = mk_pte(page, prot);
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 	unsigned long vaddr;
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 	int idx, type;
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-	preempt_disable();
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+	preempt_disable_nort();
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 	pagefault_disable();
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 	if (!PageHighMem(page))
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@@ -45,7 +46,10 @@
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 	idx = type + KM_TYPE_NR*smp_processor_id();
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 	vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
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 	BUG_ON(!pte_none(*(kmap_pte-idx)));
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-	set_pte(kmap_pte-idx, mk_pte(page, prot));
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+#ifdef CONFIG_PREEMPT_RT_FULL
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+	current->kmap_pte[type] = pte;
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+#endif
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+	set_pte(kmap_pte-idx, pte);
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 	arch_flush_lazy_mmu_mode();
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 	return (void *)vaddr;
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@@ -88,6 +92,9 @@
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 		 * is a bad idea also, in case the page changes cacheability
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 		 * attributes or becomes a protected page in a hypervisor.
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 		 */
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+#ifdef CONFIG_PREEMPT_RT_FULL
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+		current->kmap_pte[type] = __pte(0);
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+#endif
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 		kpte_clear_flush(kmap_pte-idx, vaddr);
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 		kmap_atomic_idx_pop();
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 		arch_flush_lazy_mmu_mode();
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@@ -100,7 +107,7 @@
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 #endif
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 	pagefault_enable();
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-	preempt_enable();
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+	preempt_enable_nort();
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 }
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 EXPORT_SYMBOL(__kunmap_atomic);
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