write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/arch/powerpc/mm/init_64.c
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@@ -188,7 +188,7 @@
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 	unsigned long nr_pfn = page_size / sizeof(struct page);
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 	unsigned long start_pfn = page_to_pfn((struct page *)start);
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-	if ((start_pfn + nr_pfn) > altmap->end_pfn)
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+	if ((start_pfn + nr_pfn - 1) > altmap->end_pfn)
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 		return true;
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 	if (start_pfn < altmap->base_pfn)
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@@ -313,8 +313,7 @@
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 	start = ALIGN_DOWN(start, page_size);
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 	if (altmap) {
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 		alt_start = altmap->base_pfn;
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-		alt_end = altmap->base_pfn + altmap->reserve +
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-			  altmap->free + altmap->alloc + altmap->align;
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+		alt_end = altmap->base_pfn + altmap->reserve + altmap->free;
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 	}
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 	pr_debug("vmemmap_free %lx...%lx\n", start, end);