forked from luck/tmp_suning_uos_patched
ARM/keystone: move the DMA offset handling under ifdef CONFIG_ARM_LPAE
The DMA offset notifier can only be used if PHYS_OFFSET is at least KEYSTONE_HIGH_PHYS_START, which can't be represented by a 32-bit phys_addr_t. Currently the code compiles fine despite that, a pending change to the DMA offset handling would create a compiler warning for this case. Add an ifdef to not compile the code except for LPAE configs. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Robin Murphy <robin.murphy@arm.com>
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@ -24,6 +24,7 @@
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#include "keystone.h"
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#ifdef CONFIG_ARM_LPAE
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static unsigned long keystone_dma_pfn_offset __read_mostly;
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static int keystone_platform_notifier(struct notifier_block *nb,
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@ -48,14 +49,17 @@ static int keystone_platform_notifier(struct notifier_block *nb,
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static struct notifier_block platform_nb = {
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.notifier_call = keystone_platform_notifier,
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};
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#endif /* CONFIG_ARM_LPAE */
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static void __init keystone_init(void)
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{
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#ifdef CONFIG_ARM_LPAE
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if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START) {
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keystone_dma_pfn_offset = PFN_DOWN(KEYSTONE_HIGH_PHYS_START -
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KEYSTONE_LOW_PHYS_START);
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bus_register_notifier(&platform_bus_type, &platform_nb);
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}
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#endif
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keystone_pm_runtime_init();
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}
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