linux-kernel - [PATCH] UIO: only call pgprot

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Message-Id: <1225301177-21406-1-git-send-email-vapier@gentoo.org>
Date:	Wed, 29 Oct 2008 13:26:17 -0400
From:	Mike Frysinger <vapier@...too.org>
To:	hjk@...utronix.de, gregkh@...e.de
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] UIO: only call pgprot_noncached if defined

Not all arches support pgprot_noncached (like the Blackfin port).  Other
drivers seem to handle this by checking to see if it is defined, so let's
do that in the UIO driver as well.

Signed-off-by: Mike Frysinger <vapier@...too.org>
---
 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 f9b4647..c43dbea 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -529,7 +529,9 @@ static int uio_mmap_physical(struct vm_area_struct *vma)
 
 	vma->vm_flags |= VM_IO | VM_RESERVED;
 
+#ifdef pgprot_noncached
 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+#endif
 
 	return remap_pfn_range(vma,
 			       vma->vm_start,
-- 
1.6.0.2

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