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Message-Id: <1206425814-20831-1-git-send-email-gregkh@suse.de> Date: Mon, 24 Mar 2008 23:16:53 -0700 From: Greg Kroah-Hartman <gregkh@...e.de> To: linux-kernel@...r.kernel.org Cc: Jean-Samuel Chenard <jsamch@...il.com>, Hans J Koch <hjk@...utronix.de>, stable <stable@...nel.org>, Greg Kroah-Hartman <gregkh@...e.de> Subject: [PATCH 1/2] UIO: add pgprot_noncached() to UIO mmap code From: Jean-Samuel Chenard <jsamch@...il.com> Mapping of physical memory in UIO needs pgprot_noncached() to ensure that IO memory is not cached. Without pgprot_noncached(), it (accidentally) works on x86 and arm, but fails on PPC. Signed-off-by: Jean-Samuel Chenard <jsamch@...il.com> Signed-off-by: Hans J Koch <hjk@...utronix.de> Cc: stable <stable@...nel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de> --- drivers/uio/uio.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index e8a01f2..1175908 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -470,6 +470,8 @@ static int uio_mmap_physical(struct vm_area_struct *vma) vma->vm_flags |= VM_IO | VM_RESERVED; + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + return remap_pfn_range(vma, vma->vm_start, idev->info->mem[mi].addr >> PAGE_SHIFT, -- 1.5.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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