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Commit ba748d22 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

x86: warn about RAM pages in ioremap() 



Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 320a6b2e

arch/x86/mm/ioremap.c

+4 −2
Original line number Diff line number Diff line
@@ -149,9 +149,11 @@ static void __iomem *__ioremap(resource_size_t phys_addr, unsigned long size, 
	for (pfn = phys_addr >> PAGE_SHIFT;

				(pfn << PAGE_SHIFT) < last_addr; pfn++) {



		if (page_is_ram(pfn) && pfn_valid(pfn) &&

		    !PageReserved(pfn_to_page(pfn)))

		int is_ram = page_is_ram(pfn);



		if (is_ram && pfn_valid(pfn) && !PageReserved(pfn_to_page(pfn)))

			return NULL;

		WARN_ON_ONCE(is_ram);

	}



	switch (mode) {