V4L/DVB (6748): Subject: v4l: nopage
Convert v4l from nopage to fault. Remove redundant vma range checks. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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14e3c152a1
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1 changed files with 8 additions and 12 deletions
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@ -385,30 +385,26 @@ videobuf_vm_close(struct vm_area_struct *vma)
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* now ...). Bounce buffers don't work very well for the data rates
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* now ...). Bounce buffers don't work very well for the data rates
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* video capture has.
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* video capture has.
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*/
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*/
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static struct page*
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static int
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videobuf_vm_nopage(struct vm_area_struct *vma, unsigned long vaddr,
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videobuf_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
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int *type)
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{
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{
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struct page *page;
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struct page *page;
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dprintk(3,"nopage: fault @ %08lx [vma %08lx-%08lx]\n",
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dprintk(3,"fault: fault @ %08lx [vma %08lx-%08lx]\n",
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vaddr,vma->vm_start,vma->vm_end);
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(unsigned long)vmf->virtual_address,vma->vm_start,vma->vm_end);
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if (vaddr > vma->vm_end)
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return NOPAGE_SIGBUS;
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page = alloc_page(GFP_USER | __GFP_DMA32);
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page = alloc_page(GFP_USER | __GFP_DMA32);
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if (!page)
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if (!page)
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return NOPAGE_OOM;
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return VM_FAULT_OOM;
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clear_user_page(page_address(page), vaddr, page);
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clear_user_page(page_address(page), vaddr, page);
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if (type)
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vmf->page = page;
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*type = VM_FAULT_MINOR;
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return 0;
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return page;
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}
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}
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static struct vm_operations_struct videobuf_vm_ops =
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static struct vm_operations_struct videobuf_vm_ops =
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{
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{
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.open = videobuf_vm_open,
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.open = videobuf_vm_open,
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.close = videobuf_vm_close,
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.close = videobuf_vm_close,
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.nopage = videobuf_vm_nopage,
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.fault = videobuf_vm_fault,
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};
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};
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/* ---------------------------------------------------------------------
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/* ---------------------------------------------------------------------
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