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* udf: add llseek methodChristoph Hellwig2008-09-081-0/+1
| | | | | | | | | | UDF currently doesn't set a llseek method for regular files, which means it will fall back to default_llseek. This means no one can seek beyond 2 Gigabytes on udf, and that there's not protection vs the i_size updates from writers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Fix error paths in udf_new_inode()Jan Kara2008-08-191-23/+18
| | | | | | | | | | | I case we failed to allocate memory for inode when creating it, we did not properly free block already allocated for this inode. Move memory allocation before the block allocation which fixes this issue (thanks for the idea go to Ingo Oeser <ioe-lkml@rameria.de>). Also remove a few superfluous initializations already done in udf_alloc_inode(). Reviewed-by: Ingo Oeser <ioe-lkml@rameria.de> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Fix lock inversion between iprune_mutex and alloc_mutex (v2)Jan Kara2008-08-191-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A memory allocation inside alloc_mutex must not recurse back into the filesystem itself because that leads to lock inversion between iprune_mutex and alloc_mutex (and thus to deadlocks - see traces below). alloc_mutex is actually needed only to update allocation statistics in the superblock so we can drop it before we start allocating memory for the inode. tar D ffff81015b9c8c90 0 6614 6612 ffff8100d5a21a20 0000000000000086 0000000000000000 00000000ffff0000 ffff81015b9c8c90 ffff81015b8f0cd0 ffff81015b9c8ee0 0000000000000000 0000000000000003 0000000000000000 0000000000000000 0000000000000000 Call Trace: [<ffffffff803c1d8a>] __mutex_lock_slowpath+0x64/0x9b [<ffffffff803c1bef>] mutex_lock+0xa/0xb [<ffffffff8027f8c2>] shrink_icache_memory+0x38/0x200 [<ffffffff80257742>] shrink_slab+0xe3/0x15b [<ffffffff802579db>] try_to_free_pages+0x221/0x30d [<ffffffff8025657e>] isolate_pages_global+0x0/0x31 [<ffffffff8025324b>] __alloc_pages_internal+0x252/0x3ab [<ffffffff8026b08b>] cache_alloc_refill+0x22e/0x47b [<ffffffff8026ae37>] kmem_cache_alloc+0x3b/0x61 [<ffffffff8026b15b>] cache_alloc_refill+0x2fe/0x47b [<ffffffff8026b34e>] __kmalloc+0x76/0x9c [<ffffffffa00751f2>] :udf:udf_new_inode+0x202/0x2e2 [<ffffffffa007ae5e>] :udf:udf_create+0x2f/0x16d [<ffffffffa0078f27>] :udf:udf_lookup+0xa6/0xad ... kswapd0 D ffff81015b9d9270 0 125 2 ffff81015b903c28 0000000000000046 ffffffff8028cbb0 00000000fffffffb ffff81015b9d9270 ffff81015b8f0cd0 ffff81015b9d94c0 000000000271b490 ffffe2000271b458 ffffe2000271b420 ffffe20002728dc8 ffffe20002728d90 Call Trace: [<ffffffff8028cbb0>] __set_page_dirty+0xeb/0xf5 [<ffffffff8025403a>] get_dirty_limits+0x1d/0x22f [<ffffffff803c1d8a>] __mutex_lock_slowpath+0x64/0x9b [<ffffffff803c1bef>] mutex_lock+0xa/0xb [<ffffffffa0073f58>] :udf:udf_bitmap_free_blocks+0x47/0x1eb [<ffffffffa007df31>] :udf:udf_discard_prealloc+0xc6/0x172 [<ffffffffa007875a>] :udf:udf_clear_inode+0x1e/0x48 [<ffffffff8027f121>] clear_inode+0x6d/0xc4 [<ffffffff8027f7f2>] dispose_list+0x56/0xee [<ffffffff8027fa5a>] shrink_icache_memory+0x1d0/0x200 [<ffffffff80257742>] shrink_slab+0xe3/0x15b [<ffffffff80257e93>] kswapd+0x346/0x447 ... Reported-by: Tibor Tajti <tibor.tajti@gmail.com> Reviewed-by: Ingo Oeser <ioe-lkml@rameria.de> Signed-off-by: Jan Kara <jack@suse.cz>
* SL*B: drop kmem cache argument from constructorAlexey Dobriyan2008-07-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Kmem cache passed to constructor is only needed for constructors that are themselves multiplexeres. Nobody uses this "feature", nor does anybody uses passed kmem cache in non-trivial way, so pass only pointer to object. Non-trivial places are: arch/powerpc/mm/init_64.c arch/powerpc/mm/hugetlbpage.c This is flag day, yes. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Christoph Lameter <cl@linux-foundation.org> Cc: Jon Tollefson <kniht@linux.vnet.ibm.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Matt Mackall <mpm@selenic.com> [akpm@linux-foundation.org: fix arch/powerpc/mm/hugetlbpage.c] [akpm@linux-foundation.org: fix mm/slab.c] [akpm@linux-foundation.org: fix ubifs] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* udf: Fix regression in UDF anchor block detectionTomas Janousek2008-06-241-34/+23
| | | | | | | | | | | | | | In some cases it could happen that some block passed test in udf_check_anchor_block() even though udf_read_tagged() refused to read it later (e.g. because checksum was not correct). This patch makes udf_check_anchor_block() use udf_read_tagged() so that the checking is stricter. This fixes the regression (certain disks unmountable) caused by commit 423cf6dc04eb79d441bfda2b127bc4b57134b41d. Signed-off-by: Tomas Janousek <tomi@nomi.cz> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: restore UDFFS_DEBUG to being undefined by defaultPaul Collins2008-06-161-1/+1
| | | | | | | | | Commit 706047a79725b585cf272fdefc234b31b6545c72, "udf: Fix compilation warnings when UDF debug is on" inadvertently (I assume) enabled debugging messages by default for UDF. This patch disables them again. Signed-off-by: Paul Collins <paul@ondioline.org> Signed-off-by: Jan Kara <jack@suse.cz>
* Merge branch 'for_linus' of ↵Linus Torvalds2008-05-084-6/+145
|\ | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6: udf: Fix memory corruption when fs mounted with noadinicb option udf: Make udf exportable udf: fs/udf/partition.c:udf_get_pblock() mustn't be inline
| * udf: Fix memory corruption when fs mounted with noadinicb optionJan Kara2008-05-071-2/+3
| | | | | | | | | | | | | | | | | | | | | | When UDF filesystem is mounted with noadinicb mount option, it happens that we extend an empty directory with a block. A code in udf_add_entry() didn't count with this possibility and used uninitialized data leading to memory and filesystem corruption. Add a check whether file already has some extents before operating on them. Signed-off-by: Jan Kara <jack@suse.cz>
| * udf: Make udf exportableRasmus Rohde2008-05-073-2/+140
| | | | | | | | | | | | Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Rasmus Rohde <rohde@duff.dk> Signed-off-by: Jan Kara <jack@suse.cz>
| * udf: fs/udf/partition.c:udf_get_pblock() mustn't be inlineAdrian Bunk2008-04-281-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the following build error with UML and gcc 4.3: <-- snip --> ... CC fs/udf/partition.o /home/bunk/linux/kernel-2.6/git/linux-2.6/fs/udf/partition.c: In function ‘udf_get_pblock_virt15’: /home/bunk/linux/kernel-2.6/git/linux-2.6/fs/udf/partition.c:32: sorry, unimplemented: inlining failed in call to ‘udf_get_pblock’: function body not available /home/bunk/linux/kernel-2.6/git/linux-2.6/fs/udf/partition.c:102: sorry, unimplemented: called from here make[3]: *** [fs/udf/partition.o] Error 1 <-- snip --> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Jan Kara <jack@suse.cz>
* | fs: replace remaining __FUNCTION__ occurrencesHarvey Harrison2008-04-301-2/+2
| | | | | | | | | | | | | | | | __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>
* | udf: fix sparse warning in namei.cHarvey Harrison2008-04-281-4/+4
|/ | | | | | | | | | | Let's use bsize instead. fs/udf/namei.c:960:12: warning: symbol 'elen' shadows an earlier one fs/udf/namei.c:937:15: originally declared here Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Jan Kara <jack@ucw.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* udf: use crc_itu_t from lib instead of udf_crcBob Copeland2008-04-178-203/+31
| | | | | | | | | As pointed out by Sergey Vlasov, UDF implements its own version of the CRC ITU-T V.41. Convert it to use the one in the library. Signed-off-by: Bob Copeland <me@bobcopeland.com> Cc: Sergey Vlasov <vsu@altlinux.ru> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Fix compilation warnings when UDF debug is onSebastian Manciulea2008-04-172-4/+5
| | | | | | | | Fix two compilation warnings (and actual bugs in message formatting) when UDF debugging is turned on. Signed-off-by: Sebastian Manciulea <manciuleas@yahoo.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Fix bug in VAT mapping codeSebastian Manciulea2008-04-172-5/+4
| | | | | | | | | Fix mapping of blocks using VAT when it is stored in an inode. UDF_I(inode)->i_data already points to the beginning of VAT header so there's no need to add udf_ext0_offset(inode). Signed-off-by: Sebastian Manciulea <manciuleas@yahoo.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Add read-only support for 2.50 UDF mediaJan Kara2008-04-175-14/+258
| | | | | | | | | | | | This patch implements parsing of metadata partitions and reading of Metadata File thus allowing to read UDF 2.50 media. Error resilience is implemented through accessing the Metadata Mirror File in case the data the Metadata File cannot be read. The patch is based on the original patch by Sebastian Manciulea <manciuleas@yahoo.com> and Mircea Fedoreanu <mirceaf_spl@yahoo.com>. Signed-off-by: Sebastian Manciulea <manciuleas@yahoo.com> Signed-off-by: Mircea Fedoreanu <mirceaf_spl@yahoo.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Fix handling of multisession mediaSebastian Manciulea2008-04-172-9/+6
| | | | | | | | | | According to OSTA UDF specification, only anchor blocks and primary volume descriptors are placed on media relative to the last session. All other block numbers are absolute (in the partition or the whole media). This seems to be confirmed by multisession media created by other systems. Signed-off-by: Sebastian Manciulea <manciuleas@yahoo.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Mount filesystem read-only if it has pseudooverwrite partitionJan Kara2008-04-171-0/+8
| | | | | | | | As we don't properly support writing to pseudooverwrite partition (we should add entries to VAT and relocate blocks instead of just writing them), mount filesystems with such partition as read-only. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Handle VAT packed inside inode properlyJan Kara2008-04-172-12/+22
| | | | | | | | We didn't handle VAT packed inside the inode - we tried to call udf_block_map() on such file which lead to strange results at best. Add proper handling of packed VAT as we do it with other packed files. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Allow loading of VAT inodeJan Kara2008-04-171-0/+1
| | | | | | | UDF media with VAT could have never worked because udf_fill_inode() didn't know about case FILE_TYPE_VAT20. Fix this. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Fix detection of VAT versionJan Kara2008-04-171-2/+2
| | | | | | | | We incorrectly (way to strictly) checked version of VAT on loading and thus refuse to mount correct media. There are just two format versions - below 2.0 and above 2.0 and we understand both. So update the version check accordingly. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Silence warning about accesses beyond end of deviceJan Kara2008-04-171-1/+5
| | | | | | | Some of the computed positions of anchor block could be beyond the end of device. Skip reading such blocks. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Improve anchor block detectionJan Kara2008-04-171-4/+9
| | | | | | | | | Add <last block>+1 and <last block>-1 to a list of blocks which can be the real last recorded block on a UDF media. Sebastian Manciulea <manciuleas@yahoo.com> claims this helps some drive + media combinations he is able to test. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Cleanup anchor block detection.Jan Kara2008-04-172-142/+99
| | | | | | | | | | | | | | UDF anchor block detection is complicated by several things - there are several places where the anchor point can be, some of them relative to the last recorded block which some devices report wrongly. Moreover some devices on some media seem to have 7 spare blocks sectors for every 32 blocks (at least as far as I understand the old code) so we have to count also with that possibility. This patch splits anchor block detection into several functions so that it is clearer what we actually try to do. We fix several bugs of the type "for such and such media, we fail to check block blah" as a result of the cleanup. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Move processing of virtual partitionsJan Kara2008-04-171-80/+85
| | | | | | | | This patch move processing of UDF virtual partitions close to the place where other partition types are processed. As a result we now also properly fill in partition access type. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Move filling of partition descriptor info into a separate functionJan Kara2008-04-171-56/+62
| | | | Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Improve error recovery on mountJan Kara2008-04-171-44/+42
| | | | | | | | Report error when we fail to allocate memory for a bitmap and properly release allocated memory and inodes for all the partitions in case of mount failure and umount. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Cleanup volume descriptor sequence processingJan Kara2008-04-171-54/+81
| | | | | | | Cleanup processing of volume descriptor sequence so that it is more readable, make code handle errors (e.g. media problems) better. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: fix anchor point detectionPavel Emelyanov2008-04-171-9/+6
| | | | | | | | | | | | | | | | | | | | | | | According to ECMA 167 rev. 3 (see 3/8.4.2.1), Anchor Volume Descriptor Pointer should be recorded at two or more anchor points located at sectors 256, N, N - 256, where N - is a largest logical sector number at volume space. So we should always try to detect N on UDF volume before trying to find Anchor Volume Descriptor (i.e. calling to udf_find_anchor()). That said, all this patch does is updates the s_last_block even if the udf_vrs() returns positive value. Originally written and tested by Yuri Per, ported on latest mainline by me. Signed-off-by: Yuri Per <Yuri.Per@acronis.com> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: Max Lyadvinsky <Max.Lyadvinsky@acronis.com> Cc: Vladimir Simonov <Vladimir.Simonov@acronis.com> Cc: Andrew Neporada <Andrew.Neporada@acronis.com> Cc: Kirill Korotaev <dev@openvz.org> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Remove declarations of arrays of size UDF_NAME_LEN (256 bytes)Jan Kara2008-04-172-92/+93
| | | | | | | | | There are several places in UDF where we declared temporary arrays of UDF_NAME_LEN bytes on stack. This is not nice to stack usage so this patch changes those places to use kmalloc() instead. Also clean up bail-out paths in those functions when we are changing them. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Remove checking of existence of filename in udf_add_entry()Jan Kara2008-04-171-37/+1
| | | | | | | | We don't have to check whether a directory entry already exists in a directory when creating a new one since we've already checked that earlier by lookup and we are holding directory i_mutex all the time. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: Mark udf_process_sequence() as noinlineJan Kara2008-04-171-1/+1
| | | | | | | Mark udf_process_sequence() as noinline since stack usage is terrible otherwise. Signed-off-by: Jan Kara <jack@suse.cz>
* udf: super.c reorganizationMarcin Slusarz2008-04-171-282/+270
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | reorganize few code blocks in super.c which were needlessly indented (and hard to read): so change from: rettype fun() { init; if (sth) { long block of code; } } to: rettype fun() { init; if (!sth) return; long block of code; } or from: rettype fun2() { init; while (sth) { init2(); if (sth2) { long block of code; } } } to: rettype fun2() { init; while (sth) { init2(); if (!sth2) continue; long block of code; } } Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: remove unneeded kernel_timestamp typeMarcin Slusarz2008-04-173-39/+5
| | | | | | | remove now unneeded kernel_timestamp type with conversion functions Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: convert udf_stamp_to_time and udf_time_to_stamp to use timestampsMarcin Slusarz2008-04-174-53/+41
| | | | | | | | | | | | * kernel_timestamp type was almost unused - only callers of udf_stamp_to_time and udf_time_to_stamp used it, so let these functions handle endianness internally and don't clutter code with conversions * rename udf_stamp_to_time to udf_disk_stamp_to_time and udf_time_to_stamp to udf_time_to_disk_stamp Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: convert udf_stamp_to_time to return struct timespecmarcin.slusarz@gmail.com2008-04-174-42/+37
| | | | | Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: create function for conversion from timestamp to timespecmarcin.slusarz@gmail.com2008-04-171-56/+23
| | | | | Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: udf_get_block, inode_bmap - remove unneeded checksmarcin.slusarz@gmail.com2008-04-171-12/+0
| | | | | | | | block cannot be less than 0, because it's sector_t, so remove unneeded checks Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: convert udf_count_free_bitmap to use bitmap_weightMarcin Slusarz2008-04-171-12/+5
| | | | | | | replace handwritten bits counting with bitmap_weight Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: replace udf_*_offset macros with functionsmarcin.slusarz@gmail.com2008-04-172-12/+21
| | | | | | | | | - translate udf_file_entry_alloc_offset macro into function - translate udf_ext0_offset macro into function - add comment about crypticly named fields in struct udf_inode_info Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: simplify __udf_read_inodemarcin.slusarz@gmail.com2008-04-171-29/+23
| | | | | | | | | - move all brelse(ibh) after main if, because it's called on every path except one where ibh is null - move variables to the most inner blocks Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: replace all adds to little endians variables with le*_add_cpumarcin.slusarz@gmail.com2008-04-173-29/+12
| | | | | | | | | | | | replace all: little_endian_variable = cpu_to_leX(leX_to_cpu(little_endian_variable) + expression_in_cpu_byteorder); with: leX_add_cpu(&little_endian_variable, expression_in_cpu_byteorder); sparse didn't generate any new warning with this patch Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com Signed-off-by: Jan Kara <jack@suse.cz>
* udf: truncate: create function for updating of Allocation Ext Descriptormarcin.slusarz@gmail.com2008-04-171-33/+23
| | | | | | Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Cc: Jan Kara <jack@suse.cz> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: simple cleanup of truncate.cmarcin.slusarz@gmail.com2008-04-171-42/+34
| | | | | | | | - remove one indentation level by little code reorganization - convert "if (smth) BUG();" to "BUG_ON(smth);" Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: constify crcmarcin.slusarz@gmail.com2008-04-172-3/+3
| | | | | | | | - constify internal crc table - mark udf_crc "in" parameter as const Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: udf_CS0toNLS cleanupmarcin.slusarz@gmail.com2008-04-171-11/+8
| | | | | | | | | - fix error handling - always zero output variable - don't zero explicitely fields zeroed by memset - mark "in" paramater as const Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: fix udf_build_ustrMarcin Slusarz2008-04-171-5/+7
| | | | | | | | | | | | | | | | | | | | | | | udf_build_ustr was broken: - size == 1: dest->u_len = ptr[1 - 1], but at ptr[0] there's cmpID, so we created string with wrong length it should not happen, so we BUG() it - size > 1 and size < UDF_NAME_LEN: we set u_len correctly, but memcpy copied one needless byte - size == UDF_NAME_LEN - 1: memcpy overwrited u_len - with correct value, but... - size >= UDF_NAME_LEN: we copied UDF_NAME_LEN - 1 bytes, but dest->u_name is array of UDF_NAME_LEN - 2 bytes, so we were overwriting u_len with character from input string nobody noticed because all callers set size to acceptable values (constants within range) Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* udf: udf_CS0toUTF8 cleanupmarcin.slusarz@gmail.com2008-04-172-18/+11
| | | | | | | | | | - fix error handling - always zero output variable - don't zero explicitely fields zeroed by memset - mark "in" paramater as const - remove outdated comment Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* make udf_error() staticAdrian Bunk2008-04-172-3/+4
| | | | | | | This patch makes the needlessly global udf_error() static. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Jan Kara <jack@suse.cz>
* fs/udf: Use DIV_ROUND_UPJulia Lawall2008-04-171-4/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) / (d)) but is perhaps more readable. An extract of the semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @haskernel@ @@ #include <linux/kernel.h> @depends on haskernel@ expression n,d; @@ ( - (n + d - 1) / d + DIV_ROUND_UP(n,d) | - (n + (d - 1)) / d + DIV_ROUND_UP(n,d) ) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP((n),d) + DIV_ROUND_UP(n,d) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP(n,(d)) + DIV_ROUND_UP(n,d) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Jan Kara <jack@suse.cz>
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