linux-toradex.git/fs/ext2/xip.c, branch v3.0.95 Linux kernel for Apalis and Colibri modules ext2: Unify log messages in ext2 2009-12-10T14:02:52+00:00 Alexey Fisher bug-track@fisher-privat.net 2009-11-19T18:12:51+00:00 2314b07cb47ef7d7da5779977f8c3bf1b65748d2 make messages produced by ext2 more unified. It should be easy to parse. dmesg before patch: [ 4893.684892] reservations ON [ 4893.684896] xip option not supported [ 4893.684961] EXT2-fs warning: mounting ext3 filesystem as ext2 [ 4893.684964] EXT2-fs warning: maximal mount count reached, running e2fsck is recommended [ 4893.684990] EXT II FS: 0.5b, 95/08/09, bs=1024, fs=1024, gc=2, bpg=8192, ipg=1280, mo=80010] dmesg after patch: [ 4893.684892] EXT2-fs (loop0): reservations ON [ 4893.684896] EXT2-fs (loop0): xip option not supported [ 4893.684961] EXT2-fs (loop0): warning: mounting ext3 filesystem as ext2 [ 4893.684964] EXT2-fs (loop0): warning: maximal mount count reached, running e2fsck is recommended [ 4893.684990] EXT2-fs (loop0): 0.5b, 95/08/09, bs=1024, fs=1024, gc=2, bpg=8192, ipg=1280, mo=80010] Signed-off-by: Alexey Fisher <bug-track@fisher-privat.net> Reviewed-by: Andreas Dilger <adilger@sun.com> Signed-off-by: Jan Kara <jack@suse.cz> 
make messages produced by ext2 more unified. It should be
easy to parse.

dmesg before patch:
[ 4893.684892] reservations ON
[ 4893.684896] xip option not supported
[ 4893.684961] EXT2-fs warning: mounting ext3 filesystem as ext2
[ 4893.684964] EXT2-fs warning: maximal mount count reached, running
e2fsck is recommended
[ 4893.684990] EXT II FS: 0.5b, 95/08/09, bs=1024, fs=1024, gc=2,
bpg=8192, ipg=1280, mo=80010]

dmesg after patch:
[ 4893.684892] EXT2-fs (loop0): reservations ON
[ 4893.684896] EXT2-fs (loop0): xip option not supported
[ 4893.684961] EXT2-fs (loop0): warning: mounting ext3 filesystem as
ext2
[ 4893.684964] EXT2-fs (loop0): warning: maximal mount count reached,
running e2fsck is recommended
[ 4893.684990] EXT2-fs (loop0): 0.5b, 95/08/09, bs=1024, fs=1024, gc=2,
bpg=8192, ipg=1280, mo=80010]

Signed-off-by: Alexey Fisher <bug-track@fisher-privat.net>
Reviewed-by: Andreas Dilger <adilger@sun.com>
Signed-off-by: Jan Kara <jack@suse.cz>
const: make block_device_operations const 2009-09-22T14:17:25+00:00 Alexey Dobriyan adobriyan@gmail.com 2009-09-22T00:01:13+00:00 83d5cde47dedf01b6a4a4331882cbc0a7eea3c2e Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[PATCH] move block_device_operations to blkdev.h 2008-10-21T11:47:20+00:00 Al Viro viro@zeniv.linux.org.uk 2007-10-08T17:26:20+00:00 08f85851215100d0eebf026810955ee6ad456c38 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
ext2: replace remaining __FUNCTION__ occurrences 2008-04-28T15:58:43+00:00 Harvey Harrison harvey.harrison@gmail.com 2008-04-28T09:16:03+00:00 605afd60ef6dde254fc9b8667c5bccebade251c3 __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
xip: support non-struct page backed memory 2008-04-28T15:58:23+00:00 Nick Piggin npiggin@suse.de 2008-04-28T09:13:02+00:00 70688e4dd1647f0ceb502bbd5964fa344c5eb411 Convert XIP to support non-struct page backed memory, using VM_MIXEDMAP for the user mappings. This requires the get_xip_page API to be changed to an address based one. Improve the API layering a little bit too, while we're here. This is required in order to support XIP filesystems on memory that isn't backed with struct page (but memory with struct page is still supported too). Signed-off-by: Nick Piggin <npiggin@suse.de> Acked-by: Carsten Otte <cotte@de.ibm.com> Cc: Jared Hulbert <jaredeh@gmail.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Convert XIP to support non-struct page backed memory, using VM_MIXEDMAP for
the user mappings.

This requires the get_xip_page API to be changed to an address based one.
Improve the API layering a little bit too, while we're here.

This is required in order to support XIP filesystems on memory that isn't
backed with struct page (but memory with struct page is still supported too).

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Carsten Otte <cotte@de.ibm.com>
Cc: Jared Hulbert <jaredeh@gmail.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
return pfn from direct_access, for XIP 2008-04-28T15:58:23+00:00 Jared Hulbert jaredeh@gmail.com 2008-04-28T09:13:02+00:00 30afcb4bd2762fa4b87b17ada9500aa46dc10b1b Alter the block device ->direct_access() API to work with the new get_xip_mem() API (that requires both kaddr and pfn are returned). Some architectures will not do the right thing in their virt_to_page() for use by XIP (to translate from the kernel virtual address returned by direct_access(), to a user mappable pfn in XIP's page fault handler. However, we can't switch it to just return the pfn and not the kaddr, because we have no good way to get a kva from a pfn, and XIP requires the kva for its read(2) and write(2) handlers. So we have to return both. Signed-off-by: Jared Hulbert <jaredeh@gmail.com> Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Carsten Otte <cotte@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux-mm@kvack.org Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Alter the block device ->direct_access() API to work with the new
get_xip_mem() API (that requires both kaddr and pfn are returned).

Some architectures will not do the right thing in their virt_to_page() for use
by XIP (to translate from the kernel virtual address returned by
direct_access(), to a user mappable pfn in XIP's page fault handler.

However, we can't switch it to just return the pfn and not the kaddr, because
we have no good way to get a kva from a pfn, and XIP requires the kva for its
read(2) and write(2) handlers.  So we have to return both.

Signed-off-by: Jared Hulbert <jaredeh@gmail.com>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux-mm@kvack.org
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[PATCH] fix xip sparse file handling in ext2 2005-07-27T23:25:53+00:00 Carsten Otte cotte@freenet.de 2005-07-27T18:43:52+00:00 0cfc11ed45e4c00750039e5a18c0fc0d681e19db Oliver Paukstadt from our test department is testing the xip patches in Linus' git-tree. He found a problem that shows when reading a file that contains sparse blocks (holes) on a -o xip mounted ext2 filesystem: the BUG_ON() in fs/ext2/xip.c:40 triggers where it should not. The problem was introduced by a cleanup in my previous patch, this patch fixes it. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> 
Oliver Paukstadt from our test department is testing the xip patches in
Linus' git-tree.  He found a problem that shows when reading a file that
contains sparse blocks (holes) on a -o xip mounted ext2 filesystem: the
BUG_ON() in fs/ext2/xip.c:40 triggers where it should not.  The problem was
introduced by a cleanup in my previous patch, this patch fixes it.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] execute-in-place fixes 2005-07-15T16:54:50+00:00 Carsten Otte cotte@de.ibm.com 2005-07-15T10:56:30+00:00 afa597ba20e9ef55fc6283c1a564854b1c9f13c0 This patch includes feedback from Andrew and Christoph. Thanks for taking time to review. Use of empty_zero_page was eliminated to fix compilation for architectures that don't have it. This patch removes setting pages up-to-date in ext2_get_xip_page and all bug checks to verify that the page is indeed up to date. Setting the page state on mapping to userland is bogus. None of the code patchs involved with these pages in mm cares about the page state. still on my ToDo list: identify a place outside second extended where __inode_direct_access should reside Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> 
This patch includes feedback from Andrew and Christoph. Thanks for
taking time to review.

Use of empty_zero_page was eliminated to fix compilation for architectures
that don't have it.

This patch removes setting pages up-to-date in ext2_get_xip_page and all
bug checks to verify that the page is indeed up to date.  Setting the page
state on mapping to userland is bogus.  None of the code patchs involved
with these pages in mm cares about the page state.

still on my ToDo list: identify a place outside second extended where
__inode_direct_access should reside

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] xip: ext2: execute in place 2005-06-24T07:06:41+00:00 Carsten Otte cotte@de.ibm.com 2005-06-24T05:05:26+00:00 6d79125bba55ee82701f1c7d4ebbc1aa20ecbe4e These are the ext2 related parts. Ext2 now uses the xip_* file operations along with the get_xip_page aop when mounted with -o xip. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> 
These are the ext2 related parts.  Ext2 now uses the xip_* file operations
along with the get_xip_page aop when mounted with -o xip.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>