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ARM: dma-mapping: Remove traces of NOMMU code 

DMA operations for NOMMU case have been just factored out into
separate compilation unit, so don't keep dead code.

Tested-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Tested-by: Andras Szemzo <sza@esh.hu>
Tested-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Vladimir Murzin 2017-05-24 11:24:32 +01:00 committed by Christoph Hellwig
parent 1b11d39e6a
commit 1655cf8829
1 changed files with 2 additions and 27 deletions
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29
arch/arm/mm/dma-mapping.c
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@ -353,8 +353,6 @@ static void __dma_free_buffer(struct page *page, size_t size)
}
}
#ifdef CONFIG_MMU
static void *__alloc_from_contiguous(struct device *dev, size_t size,
pgprot_t prot, struct page **ret_page,
const void *caller, bool want_vaddr,
@ -656,22 +654,6 @@ static inline pgprot_t __get_dma_pgprot(unsigned long attrs, pgprot_t prot)
return prot;
}
#define nommu() 0
#else /* !CONFIG_MMU */
#define nommu() 1
#define __get_dma_pgprot(attrs, prot) __pgprot(0)
#define __alloc_remap_buffer(dev, size, gfp, prot, ret, c, wv) NULL
#define __alloc_from_pool(size, ret_page) NULL
#define __alloc_from_contiguous(dev, size, prot, ret, c, wv, coherent_flag, gfp) NULL
#define __free_from_pool(cpu_addr, size) do { } while (0)
#define __free_from_contiguous(dev, page, cpu_addr, size, wv) do { } while (0)
#define __dma_free_remap(cpu_addr, size) do { } while (0)
#endif /* CONFIG_MMU */
static void *__alloc_simple_buffer(struct device *dev, size_t size, gfp_t gfp,
struct page **ret_page)
{
@ -814,7 +796,7 @@ static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
if (cma)
buf->allocator = &cma_allocator;
else if (nommu() || is_coherent)
else if (is_coherent)
buf->allocator = &simple_allocator;
else if (allowblock)
buf->allocator = &remap_allocator;
@ -863,8 +845,7 @@ static int __arm_dma_mmap(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
unsigned long attrs)
{
int ret = -ENXIO;
#ifdef CONFIG_MMU
int ret;
unsigned long nr_vma_pages = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
unsigned long pfn = dma_to_pfn(dev, dma_addr);
@ -879,10 +860,6 @@ static int __arm_dma_mmap(struct device *dev, struct vm_area_struct *vma,
vma->vm_end - vma->vm_start,
vma->vm_page_prot);
}
#else
ret = vm_iomap_memory(vma, vma->vm_start,
(vma->vm_end - vma->vm_start));
#endif /* CONFIG_MMU */
return ret;
}
@ -901,9 +878,7 @@ int arm_dma_mmap(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
unsigned long attrs)
{
#ifdef CONFIG_MMU
vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_page_prot);
#endif /* CONFIG_MMU */
return __arm_dma_mmap(dev, vma, cpu_addr, dma_addr, size, attrs);
}