[PATCH 4/6] ARM/keystone: move the DMA offset handling under ifdef CONFIG_ARM_LPAE
From: Christoph Hellwig <hch@lst.de>
Date: 2020-09-16 06:26:09
Also in:
linux-acpi, linux-arm-kernel, linux-iommu, linux-pci, linux-remoteproc, linux-sh, linux-usb, lkml
Subsystem:
arm port, arm/texas instrument keystone architecture, the rest · Maintainers:
Russell King, Nishanth Menon, Santosh Shilimkar, Linus Torvalds
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> --- arch/arm/mach-keystone/keystone.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/arm/mach-keystone/keystone.c b/arch/arm/mach-keystone/keystone.c
index 638808c4e12247..dcd031ba84c2e0 100644
--- a/arch/arm/mach-keystone/keystone.c
+++ b/arch/arm/mach-keystone/keystone.c@@ -24,6 +24,7 @@ #include "keystone.h" +#ifdef CONFIG_ARM_LPAE static unsigned long keystone_dma_pfn_offset __read_mostly; static int keystone_platform_notifier(struct notifier_block *nb,
@@ -48,14 +49,17 @@ static int keystone_platform_notifier(struct notifier_block *nb, static struct notifier_block platform_nb = { .notifier_call = keystone_platform_notifier, }; +#endif /* CONFIG_ARM_LPAE */ static void __init keystone_init(void) { +#ifdef CONFIG_ARM_LPAE if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START) { keystone_dma_pfn_offset = PFN_DOWN(KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START); bus_register_notifier(&platform_bus_type, &platform_nb); } +#endif keystone_pm_runtime_init(); }
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2.28.0