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Commit 06c10884 authored by Russell King's avatar Russell King
Browse files

ARM: relax ioremap prohibition (309caa9c) for -final and -stable 



... but produce a big warning about the problem as encouragement
for people to fix their drivers.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 841f48a8

arch/arm/mm/ioremap.c

+6 −2
Original line number Diff line number Diff line
@@ -204,8 +204,12 @@ void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn, 
	/*

	 * Don't allow RAM to be mapped - this causes problems with ARMv6+

	 */

	if (WARN_ON(pfn_valid(pfn)))

		return NULL;

	if (pfn_valid(pfn)) {

		printk(KERN_WARNING "BUG: Your driver calls ioremap() on system memory.  This leads\n"

		       KERN_WARNING "to architecturally unpredictable behaviour on ARMv6+, and ioremap()\n"

		       KERN_WARNING "will fail in the next kernel release.  Please fix your driver.\n");

		WARN_ON(1);

	}



	type = get_mem_type(mtype);

	if (!type)