path: root/arch/arm64/include/asm/dma-mapping.h
diff options
authorLinus Torvalds <>2015-11-19 12:21:23 -0800
committerLinus Torvalds <>2015-11-19 12:21:23 -0800
commitb4ba1f0f6533e3a49976f5736b263478509099a0 (patch)
tree46aca9a421d6844bb5e702ba988a7fbe570f604d /arch/arm64/include/asm/dma-mapping.h
parenta3d66b5a17f81ee84604f95b0e2c9ccf0434c6f0 (diff)
parent92e788b749862ebe9920360513a718e5dd4da7a9 (diff)
Merge tag 'arm64-fixes' of git://
Pull arm64 fixes from Catalin Marinas: - Fix size alignment in __iommu_{alloc,free}_attrs - Kernel memory mapping fix with CONFIG_DEBUG_RODATA for page sizes other than 4KB and a fix of the mark_rodata_ro permissions - dma_get_ops() simplification and behaviour alignment between DT and ACPI - function_graph trace fix for cpu_suspend() (CPUs returning from deep sleep via a different path and confusing the tracer) - Use of non-global mappings for UEFI run-time services to avoid a (potentially theoretical) TLB conflict - Crypto priority reduction of core AES cipher (the accelerated asynchronous implementation is preferred when available) - Reverting an old commit that removed BogoMIPS from /proc/cpuinfo on arm64. Apparently, we had it for a relatively short time and libvirt started checking for its presence - Compiler warnings fixed (ptrace.h inclusion from compat.h, smp_load_acquire with const argument) * tag 'arm64-fixes' of git:// arm64: restore bogomips information in /proc/cpuinfo arm64: barriers: fix smp_load_acquire to work with const arguments arm64: Fix R/O permissions in mark_rodata_ro arm64: crypto: reduce priority of core AES cipher arm64: use non-global mappings for UEFI runtime regions arm64: kernel: pause/unpause function graph tracer in cpu_suspend() arm64: do not include ptrace.h from compat.h arm64: simplify dma_get_ops arm64: mm: use correct mapping granularity under DEBUG_RODATA arm64/dma-mapping: Fix sizes in __iommu_{alloc,free}_attrs
Diffstat (limited to 'arch/arm64/include/asm/dma-mapping.h')
1 files changed, 3 insertions, 10 deletions
diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h
index 54d0ead41afc..61e08f360e31 100644
--- a/arch/arm64/include/asm/dma-mapping.h
+++ b/arch/arm64/include/asm/dma-mapping.h
@@ -18,7 +18,6 @@
#ifdef __KERNEL__
-#include <linux/acpi.h>
#include <linux/types.h>
#include <linux/vmalloc.h>
@@ -26,22 +25,16 @@
#include <asm/xen/hypervisor.h>
#define DMA_ERROR_CODE (~(dma_addr_t)0)
-extern struct dma_map_ops *dma_ops;
extern struct dma_map_ops dummy_dma_ops;
static inline struct dma_map_ops *__generic_dma_ops(struct device *dev)
- if (unlikely(!dev))
- return dma_ops;
- else if (dev->archdata.dma_ops)
+ if (dev && dev->archdata.dma_ops)
return dev->archdata.dma_ops;
- else if (acpi_disabled)
- return dma_ops;
- * When ACPI is enabled, if arch_set_dma_ops is not called,
- * we will disable device DMA capability by setting it
- * to dummy_dma_ops.
+ * We expect no ISA devices, and all other DMA masters are expected to
+ * have someone call arch_setup_dma_ops at device creation time.
return &dummy_dma_ops;