[PATCH 7/9] dma-mapping: move dma-debug.h to kernel/dma/

From: Christoph Hellwig
Date: Wed Sep 30 2020 - 04:56:34 EST

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Most of dma-debug.h is not required by anything outside of kernel/dma.
Move the four declarations needed by dma-mappin.h or dma-ops providers
into dma-mapping.h and dma-map-ops.h, and move the remainder of the
file to kernel/dma/debug.h.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
arch/arm/include/asm/dma-iommu.h | 1 -
arch/arm/include/asm/dma-mapping.h | 1 -
arch/microblaze/kernel/dma.c | 1 -
arch/sh/drivers/pci/pci.c | 1 -
arch/x86/include/asm/dma-mapping.h | 1 -
arch/x86/kernel/pci-dma.c | 1 -
drivers/pci/pci-driver.c | 1 +
include/linux/dma-map-ops.h | 12 +++++
include/linux/dma-mapping.h | 16 ++++++-
kernel/dma/debug.c | 5 +--
.../linux/dma-debug.h => kernel/dma/debug.h | 44 ++-----------------
kernel/dma/mapping.c | 1 +
mm/memory.c | 1 -
13 files changed, 34 insertions(+), 52 deletions(-)
rename include/linux/dma-debug.h => kernel/dma/debug.h (81%)

diff --git a/arch/arm/include/asm/dma-iommu.h b/arch/arm/include/asm/dma-iommu.h
index 86405cc81385c8..fe9ef6f79e9cfe 100644
--- a/arch/arm/include/asm/dma-iommu.h
+++ b/arch/arm/include/asm/dma-iommu.h
@@ -6,7 +6,6 @@

#include <linux/mm_types.h>
#include <linux/scatterlist.h>
-#include <linux/dma-debug.h>
#include <linux/kref.h>

struct dma_iommu_mapping {
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 0a1a536368c3a4..77082246a5e121 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -6,7 +6,6 @@

#include <linux/mm_types.h>
#include <linux/scatterlist.h>
-#include <linux/dma-debug.h>

#include <xen/xen.h>
#include <asm/xen/hypervisor.h>
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c
index d7bebd04247b72..a564863db06e98 100644
--- a/arch/microblaze/kernel/dma.c
+++ b/arch/microblaze/kernel/dma.c
@@ -10,7 +10,6 @@
#include <linux/device.h>
#include <linux/dma-noncoherent.h>
#include <linux/gfp.h>
-#include <linux/dma-debug.h>
#include <linux/export.h>
#include <linux/bug.h>
#include <asm/cacheflush.h>
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index 6ab0b7377f6634..a3903304f33faa 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -13,7 +13,6 @@
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/types.h>
-#include <linux/dma-debug.h>
#include <linux/io.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index e0c380b3ec1407..bb1654fe0ce74c 100644
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -8,7 +8,6 @@
*/

#include <linux/scatterlist.h>
-#include <linux/dma-debug.h>
#include <asm/io.h>
#include <asm/swiotlb.h>

diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 4892dd043d414c..de234e7a8962eb 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -1,7 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/dma-map-ops.h>
#include <linux/dma-direct.h>
-#include <linux/dma-debug.h>
#include <linux/iommu.h>
#include <linux/dmar.h>
#include <linux/export.h>
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 449466f71040d2..d1b7169c068403 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -19,6 +19,7 @@
#include <linux/kexec.h>
#include <linux/of_device.h>
#include <linux/acpi.h>
+#include <linux/dma-map-ops.h>
#include "pci.h"
#include "pcie/portdrv.h"

diff --git a/include/linux/dma-map-ops.h b/include/linux/dma-map-ops.h
index 7912f5d00ed950..9891def42da71f 100644
--- a/include/linux/dma-map-ops.h
+++ b/include/linux/dma-map-ops.h
@@ -220,6 +220,18 @@ static inline void arch_teardown_dma_ops(struct device *dev)
}
#endif /* CONFIG_ARCH_HAS_TEARDOWN_DMA_OPS */

+#ifdef CONFIG_DMA_API_DEBUG
+void dma_debug_add_bus(struct bus_type *bus);
+void debug_dma_dump_mappings(struct device *dev);
+#else
+static inline void dma_debug_add_bus(struct bus_type *bus)
+{
+}
+static inline void debug_dma_dump_mappings(struct device *dev)
+{
+}
+#endif /* CONFIG_DMA_API_DEBUG */
+
extern const struct dma_map_ops dma_dummy_ops;

#endif /* _LINUX_DMA_MAP_OPS_H */
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 9591cd482d7c2d..3f029afdc9dc6a 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -6,7 +6,6 @@
#include <linux/string.h>
#include <linux/device.h>
#include <linux/err.h>
-#include <linux/dma-debug.h>
#include <linux/dma-direction.h>
#include <linux/scatterlist.h>
#include <linux/bug.h>
@@ -76,6 +75,21 @@

#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))

+#ifdef CONFIG_DMA_API_DEBUG
+void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
+void debug_dma_map_single(struct device *dev, const void *addr,
+ unsigned long len);
+#else
+static inline void debug_dma_mapping_error(struct device *dev,
+ dma_addr_t dma_addr)
+{
+}
+static inline void debug_dma_map_single(struct device *dev, const void *addr,
+ unsigned long len)
+{
+}
+#endif /* CONFIG_DMA_API_DEBUG */
+
#ifdef CONFIG_HAS_DMA
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c
index 4211800d9f3e4d..14de1271463fd0 100644
--- a/kernel/dma/debug.c
+++ b/kernel/dma/debug.c
@@ -9,10 +9,9 @@

#include <linux/sched/task_stack.h>
#include <linux/scatterlist.h>
-#include <linux/dma-mapping.h>
+#include <linux/dma-map-ops.h>
#include <linux/sched/task.h>
#include <linux/stacktrace.h>
-#include <linux/dma-debug.h>
#include <linux/spinlock.h>
#include <linux/vmalloc.h>
#include <linux/debugfs.h>
@@ -24,8 +23,8 @@
#include <linux/ctype.h>
#include <linux/list.h>
#include <linux/slab.h>
-
#include <asm/sections.h>
+#include "debug.h"

#define HASH_SIZE 16384ULL
#define HASH_FN_SHIFT 13
diff --git a/include/linux/dma-debug.h b/kernel/dma/debug.h
similarity index 81%
rename from include/linux/dma-debug.h
rename to kernel/dma/debug.h
index 7b3b04ba60f32a..83643b3010b2fc 100644
--- a/include/linux/dma-debug.h
+++ b/kernel/dma/debug.h
@@ -5,28 +5,14 @@
* Author: Joerg Roedel <joerg.roedel@xxxxxxx>
*/

-#ifndef __DMA_DEBUG_H
-#define __DMA_DEBUG_H
-
-#include <linux/types.h>
-
-struct device;
-struct scatterlist;
-struct bus_type;
+#ifndef _KERNEL_DMA_DEBUG_H
+#define _KERNEL_DMA_DEBUG_H

#ifdef CONFIG_DMA_API_DEBUG
-
-extern void dma_debug_add_bus(struct bus_type *bus);
-
-extern void debug_dma_map_single(struct device *dev, const void *addr,
- unsigned long len);
-
extern void debug_dma_map_page(struct device *dev, struct page *page,
size_t offset, size_t size,
int direction, dma_addr_t dma_addr);

-extern void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
-
extern void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
size_t size, int direction);

@@ -64,31 +50,13 @@ extern void debug_dma_sync_sg_for_cpu(struct device *dev,
extern void debug_dma_sync_sg_for_device(struct device *dev,
struct scatterlist *sg,
int nelems, int direction);
-
-extern void debug_dma_dump_mappings(struct device *dev);
-
#else /* CONFIG_DMA_API_DEBUG */
-
-static inline void dma_debug_add_bus(struct bus_type *bus)
-{
-}
-
-static inline void debug_dma_map_single(struct device *dev, const void *addr,
- unsigned long len)
-{
-}
-
static inline void debug_dma_map_page(struct device *dev, struct page *page,
size_t offset, size_t size,
int direction, dma_addr_t dma_addr)
{
}

-static inline void debug_dma_mapping_error(struct device *dev,
- dma_addr_t dma_addr)
-{
-}
-
static inline void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
size_t size, int direction)
{
@@ -150,11 +118,5 @@ static inline void debug_dma_sync_sg_for_device(struct device *dev,
int nelems, int direction)
{
}
-
-static inline void debug_dma_dump_mappings(struct device *dev)
-{
-}
-
#endif /* CONFIG_DMA_API_DEBUG */
-
-#endif /* __DMA_DEBUG_H */
+#endif /* _KERNEL_DMA_DEBUG_H */
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index 2e13e6d3903fa0..335ba183e0956a 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -14,6 +14,7 @@
#include <linux/of_device.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
+#include "debug.h"

/*
* Managed DMA API
diff --git a/mm/memory.c b/mm/memory.c
index f3eb5597590232..7e4e8b81a73823 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -65,7 +65,6 @@
#include <linux/gfp.h>
#include <linux/migrate.h>
#include <linux/string.h>
-#include <linux/dma-debug.h>
#include <linux/debugfs.h>
#include <linux/userfaultfd_k.h>
#include <linux/dax.h>
--
2.28.0

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