Messages in this thread Patch in this message | | | From | Bjorn Helgaas <> | Subject | [patch 1/2] /dev/mem __HAVE_PHYS_MEM_ACCESS_PROT tidy-up | Date | Tue, 13 Dec 2005 16:56:11 -0700 |
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Tidy up __HAVE_PHYS_MEM_ACCESS_PROT usage to make mmap_mem() easier to read.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
drivers/char/mem.c | 23 ++++++++++++++--------- 1 files changed, 14 insertions(+), 9 deletions(-)
Index: work5/drivers/char/mem.c =================================================================== --- work5.orig/drivers/char/mem.c 2005-12-09 15:52:28.000000000 -0700 +++ work5/drivers/char/mem.c 2005-12-09 16:17:50.000000000 -0700 @@ -228,20 +228,25 @@ return written; } +#ifndef __HAVE_PHYS_MEM_ACCESS_PROT +static pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, + unsigned long size, pgprot_t vma_prot) +{ +#ifdef pgprot_noncached + unsigned long offset = pfn << PAGE_SHIFT; + + if (uncached_access(file, offset)) + return pgprot_noncached(vma_prot); +#endif + return vma_prot; +} +#endif + static int mmap_mem(struct file * file, struct vm_area_struct * vma) { -#if defined(__HAVE_PHYS_MEM_ACCESS_PROT) vma->vm_page_prot = phys_mem_access_prot(file, vma->vm_pgoff, vma->vm_end - vma->vm_start, vma->vm_page_prot); -#elif defined(pgprot_noncached) - unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; - int uncached; - - uncached = uncached_access(file, offset); - if (uncached) - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); -#endif /* Remap-pfn-range will mark the range VM_IO and VM_RESERVED */ if (remap_pfn_range(vma, - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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