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Message-Id: <20081107140823.6361f21e.rdunlap@xenotime.net>
Date: Fri, 7 Nov 2008 14:08:23 -0800
From: Randy Dunlap <rdunlap@...otime.net>
To: lkml <linux-kernel@...r.kernel.org>
Cc: akpm <akpm@...ux-foundation.org>,
Marco Stornelli <marco.stornelli@...il.com>,
Carsten Otte <cotte@...ibm.com>
Subject: [PATCH] DOC: update xip method info
From: Marco Stornelli <marco.stornelli@...il.com>
xip documentation updated:
- change "get_xip_page" to "get_xip_mem";
- explain changed function parameters
Signed-off-by: Marco Stornelli <marco.stornelli@...il.com>
cc: Carsten Otte <cotte@...ibm.com>
---
Documentation/filesystems/xip.txt | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
--- linux-next-20081107.orig/Documentation/filesystems/xip.txt
+++ linux-next-20081107/Documentation/filesystems/xip.txt
@@ -39,10 +39,11 @@ The block device operation is optional,
today:
- dcssblk: s390 dcss block device driver
-An address space operation named get_xip_page is used to retrieve reference
-to a struct page. To address the target page, a reference to an address_space,
-and a sector number is provided. A 3rd argument indicates whether the
-function should allocate blocks if needed.
+An address space operation named get_xip_mem is used to retrieve references
+to a page frame number and a kernel address. To obtain these values a reference
+to an address_space is provided. This function assigns values to the kmem and
+pfn parameters. The third argument indicates whether the function should allocate
+blocks if needed.
This address space operation is mutually exclusive with readpage&writepage that
do page cache read/write operations.
--
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