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Message-Id: <1277633423-5700-2-git-send-email-fujita.tomonori@lab.ntt.co.jp>
Date: Sun, 27 Jun 2010 19:10:23 +0900
From: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To: akpm@...ux-foundation.org
Cc: grundler@...isc-linux.org, lethal@...ux-sh.org,
JBottomley@...ell.com, linux-kernel@...r.kernel.org,
linux-arch@...r.kernel.org, fujita.tomonori@....ntt.co.jp
Subject: [PATCH -mm 2/2] remove dma_is_consistent() API
The definition of dma_is_consistent() isn't equal in architectures. So
it hasn't been so useful for drivers (we have only one user of the API
in tree). Even if we fix dma_is_consistent() in some architectures, it
doesn't look useful at all. It was invented long ago for some old
systems that can't allocate coherent memory at all. It's better to
export only APIs that are definitely necessary for drivers.
Let's remove this API.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
---
Documentation/DMA-API.txt | 6 ------
arch/alpha/include/asm/dma-mapping.h | 1 -
arch/arm/include/asm/dma-mapping.h | 5 -----
arch/avr32/include/asm/dma-mapping.h | 5 -----
arch/blackfin/include/asm/dma-mapping.h | 1 -
arch/cris/include/asm/dma-mapping.h | 2 --
arch/frv/include/asm/dma-mapping.h | 2 --
arch/ia64/include/asm/dma-mapping.h | 2 --
arch/m68k/include/asm/dma-mapping.h | 5 -----
arch/microblaze/include/asm/dma-mapping.h | 1 -
arch/mips/include/asm/dma-mapping.h | 2 --
arch/mips/mm/dma-default.c | 7 -------
arch/mn10300/include/asm/dma-mapping.h | 2 --
arch/parisc/include/asm/dma-mapping.h | 6 ------
arch/powerpc/include/asm/dma-mapping.h | 5 -----
arch/sh/include/asm/dma-mapping.h | 6 ------
arch/sparc/include/asm/dma-mapping.h | 1 -
arch/um/include/asm/dma-mapping.h | 1 -
arch/x86/include/asm/dma-mapping.h | 1 -
arch/xtensa/include/asm/dma-mapping.h | 2 --
include/asm-generic/dma-mapping-broken.h | 3 ---
21 files changed, 0 insertions(+), 66 deletions(-)
diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt
index 05e2ae2..fe23269 100644
--- a/Documentation/DMA-API.txt
+++ b/Documentation/DMA-API.txt
@@ -456,12 +456,6 @@ be identical to those passed in (and returned by
dma_alloc_noncoherent()).
int
-dma_is_consistent(struct device *dev, dma_addr_t dma_handle)
-
-Returns true if the device dev is performing consistent DMA on the memory
-area pointed to by the dma_handle.
-
-int
dma_get_cache_alignment(void)
Returns the processor cache alignment. This is the absolute minimum
diff --git a/arch/alpha/include/asm/dma-mapping.h b/arch/alpha/include/asm/dma-mapping.h
index 1bce816..99aa5b9 100644
--- a/arch/alpha/include/asm/dma-mapping.h
+++ b/arch/alpha/include/asm/dma-mapping.h
@@ -41,7 +41,6 @@ static inline int dma_set_mask(struct device *dev, u64 mask)
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-#define dma_is_consistent(d, h) (1)
#define dma_cache_sync(dev, va, size, dir) ((void)0)
#define dma_get_cache_alignment() L1_CACHE_BYTES
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 69ce072..40adf78 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -149,11 +149,6 @@ static inline int dma_get_cache_alignment(void)
return 32;
}
-static inline int dma_is_consistent(struct device *dev, dma_addr_t handle)
-{
- return !!arch_is_coherent();
-}
-
/*
* DMA errors are defined by all-bits-set in the DMA address.
*/
diff --git a/arch/avr32/include/asm/dma-mapping.h b/arch/avr32/include/asm/dma-mapping.h
index 0399359..eecb264 100644
--- a/arch/avr32/include/asm/dma-mapping.h
+++ b/arch/avr32/include/asm/dma-mapping.h
@@ -336,11 +336,6 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-static inline int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
-{
- return 1;
-}
-
static inline int dma_get_cache_alignment(void)
{
return boot_cpu_data.dcache.linesz;
diff --git a/arch/blackfin/include/asm/dma-mapping.h b/arch/blackfin/include/asm/dma-mapping.h
index 212cb80..ffc7007 100644
--- a/arch/blackfin/include/asm/dma-mapping.h
+++ b/arch/blackfin/include/asm/dma-mapping.h
@@ -22,7 +22,6 @@ void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
#define dma_supported(d, m) (1)
#define dma_get_cache_alignment() (32)
-#define dma_is_consistent(d, h) (1)
static inline int
dma_set_mask(struct device *dev, u64 dma_mask)
diff --git a/arch/cris/include/asm/dma-mapping.h b/arch/cris/include/asm/dma-mapping.h
index da8ef8e..d4490f6 100644
--- a/arch/cris/include/asm/dma-mapping.h
+++ b/arch/cris/include/asm/dma-mapping.h
@@ -158,8 +158,6 @@ dma_get_cache_alignment(void)
return (1 << INTERNODE_CACHE_SHIFT);
}
-#define dma_is_consistent(d, h) (1)
-
static inline void
dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
diff --git a/arch/frv/include/asm/dma-mapping.h b/arch/frv/include/asm/dma-mapping.h
index 6af5d83..c66e651 100644
--- a/arch/frv/include/asm/dma-mapping.h
+++ b/arch/frv/include/asm/dma-mapping.h
@@ -131,8 +131,6 @@ int dma_get_cache_alignment(void)
return 1 << L1_CACHE_SHIFT;
}
-#define dma_is_consistent(d, h) (1)
-
static inline
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
diff --git a/arch/ia64/include/asm/dma-mapping.h b/arch/ia64/include/asm/dma-mapping.h
index 7d09a09..f5c5094 100644
--- a/arch/ia64/include/asm/dma-mapping.h
+++ b/arch/ia64/include/asm/dma-mapping.h
@@ -99,6 +99,4 @@ dma_cache_sync (struct device *dev, void *vaddr, size_t size,
mb();
}
-#define dma_is_consistent(d, h) (1) /* all we do is coherent memory... */
-
#endif /* _ASM_IA64_DMA_MAPPING_H */
diff --git a/arch/m68k/include/asm/dma-mapping.h b/arch/m68k/include/asm/dma-mapping.h
index 26f5054..e0c4e83 100644
--- a/arch/m68k/include/asm/dma-mapping.h
+++ b/arch/m68k/include/asm/dma-mapping.h
@@ -21,11 +21,6 @@ static inline int dma_get_cache_alignment(void)
return 1 << L1_CACHE_SHIFT;
}
-static inline int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
-{
- return 0;
-}
-
extern void *dma_alloc_coherent(struct device *, size_t,
dma_addr_t *, gfp_t);
extern void dma_free_coherent(struct device *, size_t,
diff --git a/arch/microblaze/include/asm/dma-mapping.h b/arch/microblaze/include/asm/dma-mapping.h
index 18b3731..7d11eae 100644
--- a/arch/microblaze/include/asm/dma-mapping.h
+++ b/arch/microblaze/include/asm/dma-mapping.h
@@ -112,7 +112,6 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-#define dma_is_consistent(d, h) (1)
static inline void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h
index 664ba53..bb72b4a 100644
--- a/arch/mips/include/asm/dma-mapping.h
+++ b/arch/mips/include/asm/dma-mapping.h
@@ -69,8 +69,6 @@ dma_get_cache_alignment(void)
return 128;
}
-extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr);
-
extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction);
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index 9547bc0..7ba8908 100644
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -357,13 +357,6 @@ int dma_supported(struct device *dev, u64 mask)
EXPORT_SYMBOL(dma_supported);
-int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
-{
- return plat_device_is_coherent(dev);
-}
-
-EXPORT_SYMBOL(dma_is_consistent);
-
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{
diff --git a/arch/mn10300/include/asm/dma-mapping.h b/arch/mn10300/include/asm/dma-mapping.h
index 4ed1522..1123770 100644
--- a/arch/mn10300/include/asm/dma-mapping.h
+++ b/arch/mn10300/include/asm/dma-mapping.h
@@ -167,8 +167,6 @@ int dma_get_cache_alignment(void)
return 1 << L1_CACHE_SHIFT;
}
-#define dma_is_consistent(d) (1)
-
static inline
void dma_cache_sync(void *vaddr, size_t size,
enum dma_data_direction direction)
diff --git a/arch/parisc/include/asm/dma-mapping.h b/arch/parisc/include/asm/dma-mapping.h
index da69433..a80bede 100644
--- a/arch/parisc/include/asm/dma-mapping.h
+++ b/arch/parisc/include/asm/dma-mapping.h
@@ -190,12 +190,6 @@ dma_get_cache_alignment(void)
return dcache_stride;
}
-static inline int
-dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
-{
- return (hppa_dma_ops->dma_sync_single_for_cpu == NULL);
-}
-
static inline void
dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index c85ef23..6bbf57a 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -209,11 +209,6 @@ static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-#ifdef CONFIG_NOT_COHERENT_CACHE
-#define dma_is_consistent(d, h) (0)
-#else
-#define dma_is_consistent(d, h) (1)
-#endif
static inline int dma_get_cache_alignment(void)
{
diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h
index bea3337..56a2cdb 100644
--- a/arch/sh/include/asm/dma-mapping.h
+++ b/arch/sh/include/asm/dma-mapping.h
@@ -42,12 +42,6 @@ void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-#ifdef CONFIG_DMA_COHERENT
-#define dma_is_consistent(d, h) (1)
-#else
-#define dma_is_consistent(d, h) (0)
-#endif
-
static inline int dma_get_cache_alignment(void)
{
/*
diff --git a/arch/sparc/include/asm/dma-mapping.h b/arch/sparc/include/asm/dma-mapping.h
index 4b4a0c0..13366df 100644
--- a/arch/sparc/include/asm/dma-mapping.h
+++ b/arch/sparc/include/asm/dma-mapping.h
@@ -11,7 +11,6 @@ extern int dma_supported(struct device *dev, u64 mask);
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-#define dma_is_consistent(d, h) (1)
extern struct dma_map_ops *dma_ops, pci32_dma_ops;
extern struct bus_type pci_bus_type;
diff --git a/arch/um/include/asm/dma-mapping.h b/arch/um/include/asm/dma-mapping.h
index b948c14..17a2cb5 100644
--- a/arch/um/include/asm/dma-mapping.h
+++ b/arch/um/include/asm/dma-mapping.h
@@ -94,7 +94,6 @@ dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-#define dma_is_consistent(d, h) (1)
static inline int
dma_get_cache_alignment(void)
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index ac91eed..39c8b5c 100644
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -54,7 +54,6 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-#define dma_is_consistent(d, h) (1)
extern int dma_supported(struct device *hwdev, u64 mask);
extern int dma_set_mask(struct device *dev, u64 mask);
diff --git a/arch/xtensa/include/asm/dma-mapping.h b/arch/xtensa/include/asm/dma-mapping.h
index 51882ae..7947456 100644
--- a/arch/xtensa/include/asm/dma-mapping.h
+++ b/arch/xtensa/include/asm/dma-mapping.h
@@ -167,8 +167,6 @@ dma_get_cache_alignment(void)
return L1_CACHE_BYTES;
}
-#define dma_is_consistent(d, h) (1)
-
static inline void
dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
diff --git a/include/asm-generic/dma-mapping-broken.h b/include/asm-generic/dma-mapping-broken.h
index 82cd0cb..ccf7b4f 100644
--- a/include/asm-generic/dma-mapping-broken.h
+++ b/include/asm-generic/dma-mapping-broken.h
@@ -72,9 +72,6 @@ dma_set_mask(struct device *dev, u64 mask);
extern int
dma_get_cache_alignment(void);
-extern int
-dma_is_consistent(struct device *dev, dma_addr_t dma_handle);
-
extern void
dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction);
--
1.6.5
--
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