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* [S390] qdio: simplify error handling in irq handlerJan Glauber2009-06-121-32/+12
| | | | | | | | | The check for the device status in qdio_establish_handle_irq() had dead code. Remove the unused code and simplify the error handling. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: fix sanity checks in device_ops.Sebastian Ott2009-06-121-16/+8
| | | | | | | | Some sanity checks in device_ops.c test the output of container_of macros to be !NULL. Test the input parameters instead. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] secure computing arch backendHeiko Carstens2009-06-126-9/+51
| | | | | | | Enable secure computing on s390 as well. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] implement is_compat_taskHeiko Carstens2009-06-127-19/+36
| | | | | | | Implement is_compat_task and use it all over the place. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] add mini sclp driverHeiko Carstens2009-06-123-5/+342
| | | | | | | | | | | | This adds a mini sclp device driver for very early use. The primary and probably only use will be to emit a message to the console if the cpu doesn't provide the minimum required capabilities to run the kernel. After printing the message a disabled wait will be loaded and the machine stops operating. Printing the message is also part of this patch. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] use facility list for cpu type safety checkMartin Schwidefsky2009-06-122-15/+35
| | | | Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] implement interrupt-enabling rwlocksHeiko Carstens2009-06-122-3/+56
| | | | | | | | arch backend for f5f7eac41db827a47b2163330eecd7bb55ae9f12 "Allow rwlocks to re-enable interrupts". Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] merge cpu.h into cputime.hMartin Schwidefsky2009-06-127-37/+24
| | | | | | | All definition in cpu.h have to do with cputime accounting. Move them to cputime.h and remove the header file. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vdso: kernel parameter syntaxMartin Schwidefsky2009-06-121-2/+13
| | | | | | | | | The syntax of the vdso kernel parameter is documented as vdso=[on|off]. The implementation uses vdso=[0|1], an invalid parameter string disables the vdso support. Fix the mismatch by adding vdso=[on|off] as additional parameter syntax. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* block: fix kernel-doc in recent block/ changesRandy Dunlap2009-06-122-13/+14
| | | | | | | Fix kernel-doc warnings in recently changed block/ source code. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2009-06-12147-1834/+1707
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (87 commits) nilfs2: get rid of bd_mount_sem use from nilfs nilfs2: correct exclusion control in nilfs_remount function nilfs2: simplify remaining sget() use nilfs2: get rid of sget use for checking if current mount is present nilfs2: get rid of sget use for acquiring nilfs object nilfs2: remove meaningless EBUSY case from nilfs_get_sb function remove the call to ->write_super in __sync_filesystem nilfs2: call nilfs2_write_super from nilfs2_sync_fs jffs2: call jffs2_write_super from jffs2_sync_fs ufs: add ->sync_fs sysv: add ->sync_fs hfsplus: add ->sync_fs hfs: add ->sync_fs fat: add ->sync_fs ext2: add ->sync_fs exofs: add ->sync_fs bfs: add ->sync_fs affs: add ->sync_fs sanitize ->fsync() for affs repair bfs_write_inode(), switch bfs to simple_fsync() ...
| * nilfs2: get rid of bd_mount_sem use from nilfsRyusuke Konishi2009-06-124-9/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | This will remove every bd_mount_sem use in nilfs. The intended exclusion control was replaced by the previous patch ("nilfs2: correct exclusion control in nilfs_remount function") for nilfs_remount(), and this patch will replace remains with a new mutex that this inserts in nilfs object. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * nilfs2: correct exclusion control in nilfs_remount functionRyusuke Konishi2009-06-123-31/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | nilfs_remount() changes mount state of a superblock instance. Even though nilfs accesses other superblock instances during mount or remount, the mount state was not properly protected in nilfs_remount(). Moreover, nilfs_remount() has a lock order reversal problem; nilfs_get_sb() holds: 1. bdev->bd_mount_sem 2. sb->s_umount (sget acquires) and nilfs_remount() holds: 1. sb->s_umount (locked by the caller in vfs) 2. bdev->bd_mount_sem To avoid these problems, this patch divides a semaphore protecting super block instances from nilfs->ns_sem, and applies it to the mount state protection in nilfs_remount(). With this change, bd_mount_sem use is removed from nilfs_remount() and the lock order reversal will be resolved. And the new rw-semaphore, nilfs->ns_super_sem will properly protect the mount state except the modification from nilfs_error function. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * nilfs2: simplify remaining sget() useRyusuke Konishi2009-06-124-25/+75
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This simplifies the test function passed on the remaining sget() callsite in nilfs. Instead of checking mount type (i.e. ro-mount/rw-mount/snapshot mount) in the test function passed to sget(), this patch first looks up the nilfs_sb_info struct which the given mount type matches, and then acquires the super block instance holding the nilfs_sb_info. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * nilfs2: get rid of sget use for checking if current mount is presentRyusuke Konishi2009-06-122-60/+35
| | | | | | | | | | | | | | | | | | | | This stops using sget() for checking if an r/w-mount or an r/o-mount exists on the device. This elimination uses a back pointer to the current mount added to nilfs object. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * nilfs2: get rid of sget use for acquiring nilfs objectRyusuke Konishi2009-06-123-65/+76
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This will change the way to obtain nilfs object in nilfs_get_sb() function. Previously, a preliminary sget() call was performed, and the nilfs object was acquired from a super block instance found by the sget() call. This patch, instead, instroduces a new dedicated function find_or_create_nilfs(); as the name implies, the function finds an existent nilfs object from a global list or creates a new one if no object is found on the device. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * nilfs2: remove meaningless EBUSY case from nilfs_get_sb functionRyusuke Konishi2009-06-121-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following EBUSY case in nilfs_get_sb() is meaningless. Indeed, this error code is never returned to the caller. if (!s->s_root) { ... } else if (!(s->s_flags & MS_RDONLY)) { err = -EBUSY; } This simply removes the else case. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * remove the call to ->write_super in __sync_filesystemChristoph Hellwig2009-06-121-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | Now that all filesystems provide ->sync_fs methods we can change __sync_filesystem to only call ->sync_fs. This gives us a clear separation between periodic writeouts which are driven by ->write_super and data integrity syncs that go through ->sync_fs. (modulo file_fsync which is also going away) Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * nilfs2: call nilfs2_write_super from nilfs2_sync_fsChristoph Hellwig2009-06-121-0/+2
| | | | | | | | | | | | | | | | The call to ->write_super from __sync_filesystem will go away, so make sure nilfs2 performs the same actions from inside ->sync_fs. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * jffs2: call jffs2_write_super from jffs2_sync_fsChristoph Hellwig2009-06-121-0/+2
| | | | | | | | | | | | | | | | The call to ->write_super from __sync_filesystem will go away, so make sure jffs2 performs the same actions from inside ->sync_fs. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * ufs: add ->sync_fsChristoph Hellwig2009-06-121-10/+22
| | | | | | | | | | | | | | | | Add a ->sync_fs method for data integrity syncs, and reimplement ->write_super ontop of it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * sysv: add ->sync_fsChristoph Hellwig2009-06-121-6/+13
| | | | | | | | | | | | | | | | Add a ->sync_fs method for data integrity syncs, and reimplement ->write_super ontop of it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * hfsplus: add ->sync_fsChristoph Hellwig2009-06-121-5/+11
| | | | | | | | | | | | | | | | Add a ->sync_fs method for data integrity syncs, and reimplement ->write_super ontop of it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * hfs: add ->sync_fsChristoph Hellwig2009-06-121-0/+11
| | | | | | | | | | | | | | Add a ->sync_fs method for data integrity syncs. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * fat: add ->sync_fsChristoph Hellwig2009-06-121-0/+11
| | | | | | | | | | | | | | Add a ->sync_fs method for data integrity syncs. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * ext2: add ->sync_fsChristoph Hellwig2009-06-121-14/+27
| | | | | | | | | | | | | | | | Add a ->sync_fs method for data integrity syncs, and reimplement ->write_super ontop of it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * exofs: add ->sync_fsChristoph Hellwig2009-06-121-3/+13
| | | | | | | | | | | | | | | | Add a ->sync_fs method for data integrity syncs, and reimplement ->write_super ontop of it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * bfs: add ->sync_fsChristoph Hellwig2009-06-121-11/+21
| | | | | | | | | | | | | | | | Add a ->sync_fs method for data integrity syncs, and reimplement ->write_super ontop of it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * affs: add ->sync_fsChristoph Hellwig2009-06-121-13/+27
| | | | | | | | | | | | | | | | | | Add a ->sync_fs method for data integrity syncs. Factor out common code between affs_put_super, affs_write_super and the new affs_sync_fs into a helper. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * sanitize ->fsync() for affsAl Viro2009-06-123-2/+15
| | | | | | | | | | | | | | | | | | unfortunately, for affs (especially for affs directories) we have no real way to keep track of metadata ownership. So we have to do more or less what file_fsync() does, but we do *not* need to call write_super() there. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * repair bfs_write_inode(), switch bfs to simple_fsync()Al Viro2009-06-122-7/+13
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * Fix adfs GET_FRAG_ID() on big-endianAl Viro2009-06-121-1/+1
| | | | | | | | | | | | Missing conversion to host-endian before doing shifts Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * repair adfs ->write_inode(), switch to simple_fsync()Al Viro2009-06-126-6/+48
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * switch omfs to simple_fsync()Al Viro2009-06-121-16/+1
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * switch udf to simple_fsync()Al Viro2009-06-125-58/+3
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * switch ufs to simple_fsync()Al Viro2009-06-123-24/+2
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * repair sysv_write_inode(), switch sysv to simple_fsync()Al Viro2009-06-124-47/+18
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * switch minix to simple_fsync()Al Viro2009-06-124-45/+12
| | | | | | | | | | | | | | * get minix_write_inode() to honour the second argument * now we can use simple_fsync() for minixfs Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * switch ext2 to simple_fsync()Al Viro2009-06-126-66/+6
| | | | | | | | | | | | | | kill ext2_sync_file() (along with ext2/fsync.c), get rid of ext2_update_inode() - it's an alias of ext2_write_inode(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * Sanitize ->fsync() for FATAl Viro2009-06-127-19/+49
| | | | | | | | | | | | | | | | * mark directory data blocks as assoc. metadata * add new inode to deal with FAT, mark FAT blocks as assoc. metadata of that * now ->fsync() is trivial both for files and directories Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * fs/qnx4: sanitize includesAl Viro2009-06-129-95/+66
| | | | | | | | | | | | | | fs-internal parts of qnx4_fs.h taken to fs/qnx4/qnx4.h, includes adjusted, qnx4_fs.h doesn't need unifdef anymore. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * Sanitize qnx4 fsync handlingAl Viro2009-06-127-202/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | * have directory operations use mark_buffer_dirty_inode(), so that sync_mapping_buffers() would get those. * make qnx4_write_inode() honour its last argument. * get rid of insane copies of very ancient "walk the indirect blocks" in qnx4/fsync - they never matched the actual fs layout and, fortunately, never'd been called. Again, all this junk is not needed; ->fsync() should just do sync_mapping_buffers + sync_inode (and if we implement block allocation for qnx4, we'll need to use mark_buffer_dirty_inode() for extent blocks) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * New helper - simple_fsync()Al Viro2009-06-122-0/+27
| | | | | | | | | | | | | | | | writes associated buffers, then does sync_inode() to write the inode itself (and to make it clean). Depends on ->write_inode() honouring the second argument. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * Push BKL down into ->remount_fs()Alessio Igor Bogani2009-06-1218-13/+108
| | | | | | | | | | | | | | [xfs, btrfs, capifs, shmem don't need BKL, exempt] Signed-off-by: Alessio Igor Bogani <abogani@texware.it> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * fs: block_dump missing dentry lockingNick Piggin2009-06-121-17/+24
| | | | | | | | | | | | | | | | | | I think the block_dump output in __mark_inode_dirty is missing dentry locking. Surely the i_dentry list can change any time, so we may not even *get* a dentry there. If we do get one by chance, then it would appear to be able to go away or get renamed at any time... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * fs: remove incorrect I_NEW warningsNick Piggin2009-06-121-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some filesystems can call in to sync an inode that is still in the I_NEW state (eg. ext family, when mounted with -osync). This is OK because the filesystem has sole access to the new inode, so it can modify i_state without races (because no other thread should be modifying it, by definition of I_NEW). Ie. a false positive, so remove the warnings. The races are described here 7ef0d7377cb287e08f3ae94cebc919448e1f5dff, which is also where the warnings were introduced. Reported-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * linux/magic.h: move cramfs magic out of cramfs_fs.hMike Frysinger2009-06-122-2/+3
| | | | | | | | | | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org> CC: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * xfs: remove ->write_super and stop maintaining ->s_dirtChristoph Hellwig2009-06-122-14/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the write_super method is used for (1) writing back the superblock periodically from pdflush (2) called just before ->sync_fs for data integerity syncs We don't need (1) because we have our own peridoc writeout through xfssyncd, and we don't need (2) because xfs_fs_sync_fs performs a proper synchronous superblock writeout after all other data and metadata has been written out. Also remove ->s_dirt tracking as it's only used to decide when too call ->write_super. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Eric Sandeen <sandeen@sandeen.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * ntfs: remove old debug check for dirty data in ntfs_put_super()Jens Axboe2009-06-121-30/+3
| | | | | | | | | | | | | | | | This should not trigger anymore, so kill it. Acked-by: Anton Altaparmakov <aia21@cam.ac.uk> Signed-off-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * fs: Rearrange inode structure elements to avoid waste due to paddingTheodore Ts'o2009-06-121-1/+1
| | | | | | | | | | | | Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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