ARM: relax ioremap prohibition (309caa9
) for -final and -stable
... but produce a big warning about the problem as encouragement for people to fix their drivers. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -204,8 +204,12 @@ void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn,
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/*
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* Don't allow RAM to be mapped - this causes problems with ARMv6+
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*/
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if (WARN_ON(pfn_valid(pfn)))
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return NULL;
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if (pfn_valid(pfn)) {
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printk(KERN_WARNING "BUG: Your driver calls ioremap() on system memory. This leads\n"
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KERN_WARNING "to architecturally unpredictable behaviour on ARMv6+, and ioremap()\n"
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KERN_WARNING "will fail in the next kernel release. Please fix your driver.\n");
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WARN_ON(1);
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}
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type = get_mem_type(mtype);
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if (!type)
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