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authorMarco Stornelli <marco.stornelli@gmail.com>2008-11-12 13:26:56 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2008-11-12 17:17:17 -0800
commit084c304980f05833bc8a91b856af7dc7a7bb7d60 (patch)
tree31190625fec53827679dc35b828f67c546c88d57 /Documentation
parentb67ad18b06701b77ca8bfe9bb760c5c9e765e3cf (diff)
downloadop-kernel-dev-084c304980f05833bc8a91b856af7dc7a7bb7d60.zip
op-kernel-dev-084c304980f05833bc8a91b856af7dc7a7bb7d60.tar.gz
DOC: update xip method info
xip documentation updated: - change "get_xip_page" to "get_xip_mem"; - explain changed function parameters Signed-off-by: Marco Stornelli <marco.stornelli@gmail.com> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/filesystems/xip.txt9
1 files changed, 5 insertions, 4 deletions
diff --git a/Documentation/filesystems/xip.txt b/Documentation/filesystems/xip.txt
index 3cc4010..0466ee5 100644
--- a/Documentation/filesystems/xip.txt
+++ b/Documentation/filesystems/xip.txt
@@ -39,10 +39,11 @@ The block device operation is optional, these block devices support it as of
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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