修改GPIO导出默认初始值

hc

2024-10-16 50a212ec906f7524620675f0c57357691c26c81f

 kernel/arch/microblaze/mm/highmem.c
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@@ -32,17 +32,11 @@
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  */
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 #include <asm/tlbflush.h>
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-void *kmap_atomic_prot(struct page *page, pgprot_t prot)
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+void *kmap_atomic_high_prot(struct page *page, pgprot_t prot)
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 {
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 	unsigned long vaddr;
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 	int idx, type;
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-
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-	preempt_disable();
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-	pagefault_disable();
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-	if (!PageHighMem(page))
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-		return page_address(page);
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-
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 	type = kmap_atomic_idx_push();
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 	idx = type + KM_TYPE_NR*smp_processor_id();
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@@ -55,19 +49,16 @@
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 	return (void *) vaddr;
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 }
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-EXPORT_SYMBOL(kmap_atomic_prot);
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+EXPORT_SYMBOL(kmap_atomic_high_prot);
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-void __kunmap_atomic(void *kvaddr)
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+void kunmap_atomic_high(void *kvaddr)
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 {
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 	unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
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 	int type;
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 	unsigned int idx;
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-	if (vaddr < __fix_to_virt(FIX_KMAP_END)) {
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-		pagefault_enable();
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-		preempt_enable();
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+	if (vaddr < __fix_to_virt(FIX_KMAP_END))
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 		return;
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-	}
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 	type = kmap_atomic_idx();
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@@ -83,7 +74,5 @@
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 	local_flush_tlb_page(NULL, vaddr);
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 	kmap_atomic_idx_pop();
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-	pagefault_enable();
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-	preempt_enable();
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 }
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-EXPORT_SYMBOL(__kunmap_atomic);
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+EXPORT_SYMBOL(kunmap_atomic_high);