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 <>
parent 841f48a8
......@@ -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");
type = get_mem_type(mtype);
if (!type)
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