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* Freezer: Fix JFFS2 garbage collector freezing issue (rev. 2)Rafael J. Wysocki2007-12-041-1/+1
| | | | | | | | | | | | Fix breakage caused by commit d5d8c5976d6adeddb8208c240460411e2198b393 "freezer: do not send signals to kernel threads" in jffs2_garbage_collect_thread() that assumed it would be sent signals by the freezer. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Pete MacKay <armlinux@architechnical.net> Signed-off-by: Len Brown <len.brown@intel.com>
* [JFFS2] Prevent return of initialised variable in jffs2_init_acl_post()David Woodhouse2007-10-271-1/+1
| | | | | | Spotted by the Coverity checker, and pointed out by Adrian Bunk. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [JFFS2] Fix return value from jffs2_write_end()Nick Piggin2007-10-221-7/+4
| | | | | | | | | | | | | jffs2_write_end() is sometimes passing back a "written" length greater than the length we passed into it, leading to a BUG at mm/filemap.c:1749 when used with unionfs. It happens because we actually write more than was requested, to reduce log fragmentation. These "longer" writes are fine, but they shouldn't get propagated back to the vm/vfs. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [JFFS2] Tidy up fix for ACL/permissions problem.KaiGai Kohei2007-10-206-87/+94
| | | | | | | | | | | | | | | | | | | | | | | | | | [In commit 9ed437c50d89eabae763dd422579f73fdebf288d we fixed a problem with standard permissions on newly-created inodes, when POSIX ACLs are enabled. This cleans it up...] The attached patch separate jffs2_init_acl() into two parts. The one is jffs2_init_acl_pre() called from jffs2_new_inode(). It compute ACL oriented inode->i_mode bits, and allocate in-memory ACL objects associated with the new inode just before when inode meta infomation is written to the medium. The other is jffs2_init_acl_post() called from jffs2_symlink(), jffs2_mkdir(), jffs2_mknod() and jffs2_do_create(). It actually writes in-memory ACL objects into the medium next to the success of writing meta-information. In the current implementation, we have to write a same inode meta infomation twice when inode->i_mode is updated by the default ACL. However, we can avoid the behavior by putting an updated i_mode before it is written at first, as jffs2_init_acl_pre() doing. Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* Use helpers to obtain task pid in printksPavel Emelyanov2007-10-191-4/+4
| | | | | | | | | | | | | | | | The task_struct->pid member is going to be deprecated, so start using the helpers (task_pid_nr/task_pid_vnr/task_pid_nr_ns) in the kernel. The first thing to start with is the pid, printed to dmesg - in this case we may safely use task_pid_nr(). Besides, printks produce more (much more) than a half of all the explicit pid usage. [akpm@linux-foundation.org: git-drm went and changed lots of stuff] Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: Dave Airlie <airlied@linux.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Slab API: remove useless ctor parameter and reorder parametersChristoph Lameter2007-10-171-1/+1
| | | | | | | | | | | | | | | | | | | | | Slab constructors currently have a flags parameter that is never used. And the order of the arguments is opposite to other slab functions. The object pointer is placed before the kmem_cache pointer. Convert ctor(void *object, struct kmem_cache *s, unsigned long flags) to ctor(struct kmem_cache *s, void *object) throughout the kernel [akpm@linux-foundation.org: coupla fixes] Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* jffs2: convert to new aopsNick Piggin2007-10-161-39/+66
| | | | | | | Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge Linux 2.6.23David Woodhouse2007-10-131-1/+1
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| * [JFFS2] fix write deadlock regressionJason Lunz2007-09-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I've bisected the deadlock when many small appends are done on jffs2 down to this commit: commit 6fe6900e1e5b6fa9e5c59aa5061f244fe3f467e2 Author: Nick Piggin <npiggin@suse.de> Date: Sun May 6 14:49:04 2007 -0700 mm: make read_cache_page synchronous Ensure pages are uptodate after returning from read_cache_page, which allows us to cut out most of the filesystem-internal PageUptodate calls. I didn't have a great look down the call chains, but this appears to fixes 7 possible use-before uptodate in hfs, 2 in hfsplus, 1 in jfs, a few in ecryptfs, 1 in jffs2, and a possible cleared data overwritten with readpage in block2mtd. All depending on whether the filler is async and/or can return with a !uptodate page. It introduced a wait to read_cache_page, as well as a read_cache_page_async function equivalent to the old read_cache_page without any callers. Switching jffs2_gc_fetch_page to read_cache_page_async for the old behavior makes the deadlocks go away, but maybe reintroduces the use-before-uptodate problem? I don't understand the mm/fs interaction well enough to say. [It's fine. dwmw2.] Signed-off-by: Jason Lunz <lunz@falooley.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Remove stray debugging printkDavid Woodhouse2007-10-131-3/+1
| | | | | | | | Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Handle dirents on the flash with embedded zero bytes in names.David Woodhouse2007-10-133-9/+35
| | | | | | | | | | | | | | | | | | In three places: summary scan, normal scan, REF_PRISTINE GC. Just truncate at the NUL, since that was the correct thing to do in the only case where this (inexplicable) breakage has been seen. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Check for creation of dirents with embedded zero bytes in name.David Woodhouse2007-10-131-1/+12
| | | | | | | | | | | | | | I have no idea how this happened, but OLPC trac #4184 suggests that it did. Catch it early. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Don't count all 'very dirty' blocks except in debug modeDavid Woodhouse2007-10-131-1/+3
| | | | | | | | | | | | ... where we'll actually print the count in a debug message. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Check whether garbage-collection actually obsoleted its victim.David Woodhouse2007-10-131-2/+12
| | | | | | | | | | | | | | | | | | In OLPC trac #4184 we found a case where a corrupted node didn't actually get obsoleted when we tried to garbage-collect it. So we wrote out many million copies of it, in repeated attempts to obsolete it, until the flash became full. Don't Do That. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Relax threshold for triggering GC due to dirty blocks.David Woodhouse2007-10-131-1/+1
| | | | | | | | | | | | | | | | | | | | Instead of matching resv_blocks_gcmerge, which is only about 3, instead match resv_blocks_gctrigger, which includes a proportion of the total device size. These ought to become tunable from userspace, at some point. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Trigger garbage collection when very_dirty_list size becomes excessiveDavid Woodhouse2007-10-063-2/+24
| | | | | | | | | | | | | | | | With huge amounts of free space, we weren't bothering to GC for while a while, and pathological numbers of obsolete nodes were accumulating, seriously affecting performance on NAND flash (OLPC trac #3978) Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Fix unpoint lengthAndy Lowe2007-09-233-3/+3
| | | | | | | | | | | | | | | | | | | | Fix a couple of instances in JFFS2 where the unpoint() routine is being called with the wrong length in cases where the point() routine truncated a request. Signed-off-by: Andy Lowe <alowe@mvista.com> Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | Merge branch 'master' of ↵David Woodhouse2007-08-231-0/+3
|\ \ | |/ | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
| * JFFS2 locking regression fix.David Woodhouse2007-08-201-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit a491486a2087ac3dfc00efb4f838c8d684afaf54 introduced a locking problem in JFFS2 -- we up() the alloc_sem when we weren't previously holding it. This leads to all kinds of fun behaviour later. There was a _reason_ for the if (1 /* alternative path needs testing */ || which the above-mentioned commit removed :) Discovered and debugged by Giulio Fedel <giulio.fedel@andorsystems.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * [JFFS2] Print correct node offset when complaining about broken data CRCDavid Woodhouse2007-08-021-1/+1
| | | | | | | | | | | | | | Debugging the hardware problems in OLPC trac #1905 would be a whole lot easier if the correct node offsets were printed for the offending nodes. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * [JFFS2] Fix suspend failure with JFFS2 GC thread.David Woodhouse2007-08-021-4/+4
| | | | | | | | | | | | | | | | The try_to_freeze() call was in the wrong place; we need it in the signal-pending loop now that a pending freeze also makes signal_pending() return true. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * [JFFS2] Deletion dirents should be REF_NORMAL, not REF_PRISTINE.David Woodhouse2007-08-024-3/+10
| | | | | | | | | | | | | | Otherwise they'll never actually get garbage-collected. Noted by Jonathan Larmour. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * [JFFS2] Prevent oops after 'node added in wrong place' debug checkJoakim Tjernlund2007-08-021-0/+12
| | | | | | | | | | | | | | | | | | | | jffs2_add_physical_node_ref() should never really return error -- it's an internal debugging check which triggered. We really need to work out why and stop it happening. But in the meantime, let's make the failure mode a little less nasty. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] fix printk warning in jffs2_block_check_erase()Andrew Morton2007-08-221-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | fs/jffs2/erase.c: In function 'jffs2_block_check_erase': fs/jffs2/erase.c:355: warning: format '%08x' expects type 'unsigned int', but argument 3 has type 'long unsigned int' and fs/jffs2/erase.c: In function 'jffs2_erase_pending_blocks': fs/jffs2/erase.c:404: warning: 'bad_offset' may be used uninitialized in this function Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Fix ACL vs. mode handling.David Woodhouse2007-08-225-30/+67
| | | | | | | | | | | | | | | | | | When POSIX ACL support was enabled, we weren't writing correct legacy modes to the medium on inode creation, or when the ACL was set. This meant that the permissions would be incorrect after the file system was remounted. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Correct cleanmarker checks -- we should use only 8 bytesDavid Woodhouse2007-08-091-2/+2
| | | | | | | | | | | | | | | | | | | | Commit a7a6ace1406f95c3edb8365788f85984377f3832 revamped the OOB handling but accidentally switched to 12-byte cleanmarkers, which is incompatible with what 'flash_eraseall -j' will do. So using flash_eraseall -j and then trying to mount the 'empty' flash will fail, because the cleanmarkers aren't recognised. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | Merge branch 'master' of ↵David Woodhouse2007-07-234-11/+12
|\ \ | |/ | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
| * mm: Remove slab destructors from kmem_cache_create().Paul Mundt2007-07-202-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Slab destructors were no longer supported after Christoph's c59def9f222d44bb7e2f0a559f2906191a0862d7 change. They've been BUGs for both slab and slub, and slob never supported them either. This rips out support for the dtor pointer from kmem_cache_create() completely and fixes up every single callsite in the kernel (there were about 224, not including the slab allocator definitions themselves, or the documentation references). Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| * Introduce is_owner_or_cap() to wrap CAP_FOWNER use with fsuid checkSatyam Sharma2007-07-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce is_owner_or_cap() macro in fs.h, and convert over relevant users to it. This is done because we want to avoid bugs in the future where we check for only effective fsuid of the current task against a file's owning uid, without simultaneously checking for CAP_FOWNER as well, thus violating its semantics. [ XFS uses special macros and structures, and in general looked ... untouchable, so we leave it alone -- but it has been looked over. ] The (current->fsuid != inode->i_uid) check in generic_permission() and exec_permission_lite() is left alone, because those operations are covered by CAP_DAC_OVERRIDE and CAP_DAC_READ_SEARCH. Similarly operations falling under the purview of CAP_CHOWN and CAP_LEASE are also left alone. Signed-off-by: Satyam Sharma <ssatyam@cse.iitk.ac.in> Cc: Al Viro <viro@ftp.linux.org.uk> Acked-by: Serge E. Hallyn <serge@hallyn.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * Freezer: make kernel threads nonfreezable by defaultRafael J. Wysocki2007-07-171-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the freezer treats all tasks as freezable, except for the kernel threads that explicitly set the PF_NOFREEZE flag for themselves. This approach is problematic, since it requires every kernel thread to either set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't care for the freezing of tasks at all. It seems better to only require the kernel threads that want to or need to be frozen to use some freezer-related code and to remove any freezer-related code from the other (nonfreezable) kernel threads, which is done in this patch. The patch causes all kernel threads to be nonfreezable by default (ie. to have PF_NOFREEZE set by default) and introduces the set_freezable() function that should be called by the freezable kernel threads in order to unset PF_NOFREEZE. It also makes all of the currently freezable kernel threads call set_freezable(), so it shouldn't cause any (intentional) change of behaviour to appear. Additionally, it updates documentation to describe the freezing of tasks more accurately. [akpm@linux-foundation.org: build fixes] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net> Cc: Pavel Machek <pavel@ucw.cz> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | [JFFS2] Add declaration of jffs2_lzo_{init,exit} to compr.hDavid Woodhouse2007-07-111-0/+4
| | | | | | | | | | | | | | | | | | fs/jffs2/compr.c: In function ‘jffs2_compressors_init’: fs/jffs2/compr.c:320: warning: implicit declaration of function ‘jffs2_lzo_init’ fs/jffs2/compr.c: In function ‘jffs2_compressors_exit’: fs/jffs2/compr.c:346: warning: implicit declaration of function ‘jffs2_lzo_exit’ Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Add a "favourlzo" compression modeRichard Purdie2007-07-112-5/+43
| | | | | | | | | | | | | | | | | | | | | | Add a "favourlzo" compression mode to jffs2 which tries to optimise by size but gives lzo an advantage when comparing sizes. This means the faster lzo algorithm can be preferred when there isn't much difference in compressed size (the exact threshold can be changed). Signed-off-by: Richard Purdie <rpurdie@openedhand.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Add LZO compression support.Richard Purdie2007-07-114-1/+117
| | | | | | | | | | | | | | | | | | | | Add LZO1X compression/decompression support to jffs2. LZO's interface doesn't entirely match that required by jffs2 so a buffer and memcpy is unavoidable. Signed-off-by: Richard Purdie <rpurdie@openedhand.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | Merge branch 'master' of ↵David Woodhouse2007-07-111-1/+1
|\ \ | |/ | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
| * sendfile: remove .sendfile from filesystems that use generic_file_sendfile()Jens Axboe2007-07-101-1/+1
| | | | | | | | | | | | | | They can use generic_file_splice_read() instead. Since sys_sendfile() now prefers that, there should be no change in behaviour. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * [JFFS2] Fix readinode failure when read_dnode() detects CRC failure.David Woodhouse2007-07-041-14/+9
| | | | | | | | | | | | | | | | We should have stopped returning 1 from read_dnode() to indicate failure. We can just mark the damn thing obsolete immediately. But I missed a case where we don't. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Add support for write-buffer verification.David Woodhouse2007-07-112-10/+66
| | | | | | | | | | | | | | | | | | | | We've seen some evil corruption issues, where the corruption seems to be introduced after the JFFS2 crc32 is calculated but before the NAND controller calculates the ECC. So it's in RAM or in the PCI DMA transfer; not on the flash. Attempt to catch it earlier by (optionally) reading back from the flash immediately after writing it. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Whitespace cleanups.David Woodhouse2007-07-1019-247/+248
| | | | | | | | | | | | Convert many spaces to tabs; one or two other minor cosmetic fixes. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Print correct node offset when complaining about broken data CRCDavid Woodhouse2007-07-051-1/+1
| | | | | | | | | | | | | | Debugging the hardware problems in OLPC trac #1905 would be a whole lot easier if the correct node offsets were printed for the offending nodes. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Fix readinode failure when read_dnode() detects CRC failure.David Woodhouse2007-07-031-14/+9
| | | | | | | | | | | | | | | | We should have stopped returning 1 from read_dnode() to indicate failure. We can just mark the damn thing obsolete immediately. But I missed a case where we don't. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Deletion dirents should be REF_NORMAL, not REF_PRISTINE.David Woodhouse2007-06-294-3/+10
| | | | | | | | | | | | | | Otherwise they'll never actually get garbage-collected. Noted by Jonathan Larmour. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Fix suspend failure with JFFS2 GC thread.David Woodhouse2007-06-281-4/+4
| | | | | | | | | | | | | | | | The try_to_freeze() call was in the wrong place; we need it in the signal-pending loop now that a pending freeze also makes signal_pending() return true. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Improve diagnostic output for 'node added in wrong place' checkDavid Woodhouse2007-06-281-1/+6
| | | | | | | | | | | | Jocke has seen this fail. We want to know why. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Reduce time for which erase_free_sem is held during erase.Joakim Tjernlund2007-06-281-2/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With current desing erase_free_sem is locked every time the flash block is being erased. For NOR flashes - ~1 second is needed to erase single flash block. In the worst case scenario erase_free_sem may be locked for a couple of seconds when the number of blocks is being erased (e.g. after large file was removed). When erase_free_sem is locked all read/write operations for given JFFS2 partition are locked too - in effect from time to time access to the JFFS2 partition is locked for a number of seconds. This fix makes critical section in flash erasing procedure shorter - now erase_free_sem is locked around erase_completion_lock spinlock only. Originally from Radoslaw Bisewski Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Prevent oops after 'node added in wrong place' debug checkJoakim Tjernlund2007-06-281-0/+12
| | | | | | | | | | | | | | | | | | | | jffs2_add_physical_node_ref() should never really return error -- it's an internal debugging check which triggered. We really need to work out why and stop it happening. But in the meantime, let's make the failure mode a little less nasty. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Use point(), if available, to check newly erased blocks.Joakim Tjernlund2007-06-281-0/+27
| | | | | | | | | | | | | | Faster and won't trash the D-cache. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | [JFFS2] Fix hanging close for /dev/mtd character device.Joakim Tjernlund2007-06-281-1/+1
|/ | | | | | | | When pdflush is erasing lots of sectors, drivers calling mtd->sync will hang until all blocks are erased. Be nicer. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* Merge git://git.infradead.org/mtd-2.6Linus Torvalds2007-06-043-182/+40
|\ | | | | | | | | | | | | | | | | | | | | * git://git.infradead.org/mtd-2.6: [JFFS2] Fix obsoletion of metadata nodes in jffs2_add_tn_to_tree() [MTD] Fix error checking after get_mtd_device() in get_sb_mtd functions [JFFS2] Fix buffer length calculations in jffs2_get_inode_nodes() [JFFS2] Fix potential memory leak of dead xattrs on unmount. [JFFS2] Fix BUG() caused by failing to discard xattrs on deleted files. [MTD] generalise the handling of MTD-specific superblocks [MTD] [MAPS] don't force uclinux mtd map to be root dev
| * [JFFS2] Fix obsoletion of metadata nodes in jffs2_add_tn_to_tree()David Woodhouse2007-06-011-3/+10
| | | | | | | | | | | | | | We should keep the mdata node with higher version number, not just the one we happen to find latest. Doh. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
| * [JFFS2] Fix buffer length calculations in jffs2_get_inode_nodes()Artem Bityutskiy2007-06-011-3/+6
| | | | | | | | | | | | | | If we have already read enough bytes, no need to call read_more(). Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
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