)]}'
{
  "log": [
    {
      "commit": "e2a0883e4071237d09b604a342c28b96b44a04b3",
      "tree": "aa56f4d376b5eb1c32358c19c2669c2a94e0e1fd",
      "parents": [
        "3a990a52f9f25f45469e272017a31e7a3fda60ed",
        "07c0c5d8b8c122b2f2df9ee574ac3083daefc981"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Mar 21 13:36:41 2012 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Mar 21 13:36:41 2012 -0700"
      },
      "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs\n\nPull vfs pile 1 from Al Viro:\n \"This is _not_ all; in particular, Miklos\u0027 and Jan\u0027s stuff is not there\n  yet.\"\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (64 commits)\n  ext4: initialization of ext4_li_mtx needs to be done earlier\n  debugfs-related mode_t whack-a-mole\n  hfsplus: add an ioctl to bless files\n  hfsplus: change finder_info to u32\n  hfsplus: initialise userflags\n  qnx4: new helper - try_extent()\n  qnx4: get rid of qnx4_bread/qnx4_getblk\n  take removal of PF_FORKNOEXEC to flush_old_exec()\n  trim includes in inode.c\n  um: uml_dup_mmap() relies on -\u003emmap_sem being held, but activate_mm() doesn\u0027t hold it\n  um: embed -\u003estub_pages[] into mmu_context\n  gadgetfs: list_for_each_safe() misuse\n  ocfs2: fix leaks on failure exits in module_init\n  ecryptfs: make register_filesystem() the last potential failure exit\n  ntfs: forgets to unregister sysctls on register_filesystem() failure\n  logfs: missing cleanup on register_filesystem() failure\n  jfs: mising cleanup on register_filesystem() failure\n  make configfs_pin_fs() return root dentry on success\n  configfs: configfs_create_dir() has parent dentry in dentry-\u003ed_parent\n  configfs: sanitize configfs_create()\n  ...\n"
    },
    {
      "commit": "8de52778798fe39660a8d6b26f290e0c93202761",
      "tree": "56384beb7863c1f338f2b66b509bf58eea5a99c2",
      "parents": [
        "c16fa4f2ad19908a47c63d8fa436a1178438c7e7"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Feb 06 12:45:27 2012 -0500"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Mar 20 21:29:32 2012 -0400"
      },
      "message": "vfs: check i_nlink limits in vfs_{mkdir,rename_dir,link}\n\nNew field of struct super_block - -\u003es_max_links.  Maximal allowed\nvalue of -\u003ei_nlink or 0; in the latter case all checks still need\nto be done in -\u003elink/-\u003emkdir/-\u003erename instances.  Note that this\nlimit applies both to directoris and to non-directories.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "50bc9b65b6e32f146c3c9812a9d62fe7ff518b5a",
      "tree": "02d0206da0f4ea6a472708da02d5e4083570960c",
      "parents": [
        "303a8f2afc7ba01083b50b7fceac2a412f28da4e"
      ],
      "author": {
        "name": "Cong Wang",
        "email": "amwang@redhat.com",
        "time": "Fri Nov 25 23:14:31 2011 +0800"
      },
      "committer": {
        "name": "Cong Wang",
        "email": "xiyou.wangcong@gmail.com",
        "time": "Tue Mar 20 21:48:24 2012 +0800"
      },
      "message": "logfs: remove the second argument of k[un]map_atomic()\n\nSigned-off-by: Cong Wang \u003camwang@redhat.com\u003e\n"
    },
    {
      "commit": "d3712b9dfcf44ca145cf87e7f4096fa2d923471a",
      "tree": "d72aaaa845fb81c669093363a0a1cc6d9e96baf2",
      "parents": [
        "c5d2bc11030568966f04a2af35bacf33d3e37af7",
        "f2933e86ad93a8d1287079d59e67afd6f4166a9d"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Jan 31 09:23:59 2012 -0800"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Tue Jan 31 09:23:59 2012 -0800"
      },
      "message": "Merge tag \u0027for-linus\u0027 of git://github.com/prasad-joshi/logfs_upstream\n\nThere are few important bug fixes for LogFS\n\n* tag \u0027for-linus\u0027 of git://github.com/prasad-joshi/logfs_upstream:\n  Logfs: Allow NULL block_isbad() methods\n  logfs: Grow inode in delete path\n  logfs: Free areas before calling generic_shutdown_super()\n  logfs: remove useless BUG_ON\n  MAINTAINERS: Add Prasad Joshi in LogFS maintiners\n  logfs: Propagate page parameter to __logfs_write_inode\n  logfs: set superblock shutdown flag after generic sb shutdown\n  logfs: take write mutex lock during fsync and sync\n  logfs: Prevent memory corruption\n  logfs: update page reference count for pined pages\n\nFix up conflict in fs/logfs/dev_mtd.c due to semantic change in what\n\"mtd-\u003eblock_isbad\" means in commit f2933e86ad93: \"Logfs: Allow NULL\nblock_isbad() methods\" clashing with the abstraction changes in the\ncommits 7086c19d0742: \"mtd: introduce mtd_block_isbad interface\" and\nd58b27ed58a3: \"logfs: do not use \u0027mtd-\u003eblock_isbad\u0027 directly\".\n\nThis resolution takes the semantics from commit f2933e86ad93, and just\nmakes mtd_block_isbad() return zero (false) if the \u0027block_isbad\u0027\nfunction is NULL.  But that also means that now \"mtd_can_have_bb()\"\nalways returns 0.\n\nNow, \"mtd_block_markbad()\" will obviously return an error if the\nlow-level driver doesn\u0027t support bad blocks, so this is somewhat\nnon-symmetric, but it actually makes sense if a NULL \"block_isbad\"\nfunction is considered to mean \"I assume that all my blocks are always\ngood\".\n"
    },
    {
      "commit": "0bd90387ed5a8abbcf43391b480efdc211721cfe",
      "tree": "ce92c57f4a56b601a694a0d50e5b2834065f42c1",
      "parents": [
        "ecfd890991a26e70547e025673580923a004c5e4"
      ],
      "author": {
        "name": "Prasad Joshi",
        "email": "prasadjoshi.linux@gmail.com",
        "time": "Sun Oct 02 23:46:51 2011 +0530"
      },
      "committer": {
        "name": "Prasad Joshi",
        "email": "prasadjoshi.linux@gmail.com",
        "time": "Sat Jan 28 11:38:25 2012 +0530"
      },
      "message": "logfs: Propagate page parameter to __logfs_write_inode\n\nDuring GC LogFS has to rewrite each valid block to a separate segment.\nRewrite operation reads data from an old segment and writes it to a\nnewly allocated segment. Since every write operation changes data\nblock pointers maintained in inode, inode should also be rewritten.\n\nIn GC path to avoid AB-BA deadlock LogFS marks a page with\nPG_pre_locked in addition to locking the page (PG_locked). The page\nlock is ignored iff the page is pre-locked.\n\nLogFS uses a special file called segment file. The segment file\nmaintains an 8 bytes entry for every segment. It keeps track of erase\ncount, level etc. for every segment.\n\nBad things happen with a segment belonging to the segment file is GCed\n\n ------------[ cut here ]------------\nkernel BUG at /home/prasad/logfs/readwrite.c:297!\ninvalid opcode: 0000 [#1] SMP\nModules linked in: logfs joydev usbhid hid psmouse e1000 i2c_piix4\n\t\tserio_raw [last unloaded: logfs]\nPid: 20161, comm: mount Not tainted 3.1.0-rc3+ #3 innotek GmbH\n\t\tVirtualBox\nEIP: 0060:[\u003cf809132a\u003e] EFLAGS: 00010292 CPU: 0\nEIP is at logfs_lock_write_page+0x6a/0x70 [logfs]\nEAX: 00000027 EBX: f73f5b20 ECX: c16007c8 EDX: 00000094\nESI: 00000000 EDI: e59be6e4 EBP: c7337b28 ESP: c7337b18\nDS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068\nProcess mount (pid: 20161, ti\u003dc7336000 task\u003deb323f70 task.ti\u003dc7336000)\nStack:\nf8099a3d c7337b24 f73f5b20 00001002 c7337b50 f8091f6d f8099a4d f80994e4\n00000003 00000000 c7337b68 00000000 c67e4400 00001000 c7337b80 f80935e5\n00000000 00000000 00000000 00000000 e1fcf000 0000000f e59be618 c70bf900\nCall Trace:\n[\u003cf8091f6d\u003e] logfs_get_write_page.clone.16+0xdd/0x100 [logfs]\n[\u003cf80935e5\u003e] logfs_mod_segment_entry+0x55/0x110 [logfs]\n[\u003cf809460d\u003e] logfs_get_segment_entry+0x1d/0x20 [logfs]\n[\u003cf8091060\u003e] ? logfs_cleanup_journal+0x50/0x50 [logfs]\n[\u003cf809521b\u003e] ostore_get_erase_count+0x1b/0x40 [logfs]\n[\u003cf80965b8\u003e] logfs_open_area+0xc8/0x150 [logfs]\n[\u003cc141a7ec\u003e] ? kmemleak_alloc+0x2c/0x60\n[\u003cf809668e\u003e] __logfs_segment_write.clone.16+0x4e/0x1b0 [logfs]\n[\u003cc10dd563\u003e] ? mempool_kmalloc+0x13/0x20\n[\u003cc10dd563\u003e] ? mempool_kmalloc+0x13/0x20\n[\u003cf809696f\u003e] logfs_segment_write+0x17f/0x1d0 [logfs]\n[\u003cf8092e8c\u003e] logfs_write_i0+0x11c/0x180 [logfs]\n[\u003cf8092f35\u003e] logfs_write_direct+0x45/0x90 [logfs]\n[\u003cf80934cd\u003e] __logfs_write_buf+0xbd/0xf0 [logfs]\n[\u003cc102900e\u003e] ? kmap_atomic_prot+0x4e/0xe0\n[\u003cf809424b\u003e] logfs_write_buf+0x3b/0x60 [logfs]\n[\u003cf80947a9\u003e] __logfs_write_inode+0xa9/0x110 [logfs]\n[\u003cf8094cb0\u003e] logfs_rewrite_block+0xc0/0x110 [logfs]\n[\u003cf8095300\u003e] ? get_mapping_page+0x10/0x60 [logfs]\n[\u003cf8095aa0\u003e] ? logfs_load_object_aliases+0x2e0/0x2f0 [logfs]\n[\u003cf808e57d\u003e] logfs_gc_segment+0x2ad/0x310 [logfs]\n[\u003cf808e62a\u003e] __logfs_gc_once+0x4a/0x80 [logfs]\n[\u003cf808ed43\u003e] logfs_gc_pass+0x683/0x6a0 [logfs]\n[\u003cf8097a89\u003e] logfs_mount+0x5a9/0x680 [logfs]\n[\u003cc1126b21\u003e] mount_fs+0x21/0xd0\n[\u003cc10f6f6f\u003e] ? __alloc_percpu+0xf/0x20\n[\u003cc113da41\u003e] ? alloc_vfsmnt+0xb1/0x130\n[\u003cc113db4b\u003e] vfs_kern_mount+0x4b/0xa0\n[\u003cc113e06e\u003e] do_kern_mount+0x3e/0xe0\n[\u003cc113f60d\u003e] do_mount+0x34d/0x670\n[\u003cc10f2749\u003e] ? strndup_user+0x49/0x70\n[\u003cc113fcab\u003e] sys_mount+0x6b/0xa0\n[\u003cc142d87c\u003e] syscall_call+0x7/0xb\nCode: f8 e8 8b 93 39 c9 8b 45 f8 3e 0f ba 28 00 19 d2 85 d2 74 ca eb d0 0f 0b 8d 45 fc 89 44 24 04 c7 04 24 3d 9a 09 f8 e8 09 92 39 c9 \u003c0f\u003e 0b 8d 74 26 00 55 89 e5 3e 8d 74 26 00 8b 10 80 e6 01 74 09\nEIP: [\u003cf809132a\u003e] logfs_lock_write_page+0x6a/0x70 [logfs] SS:ESP 0068:c7337b18\n---[ end trace 96e67d5b3aa3d6ca ]---\n\nThe patch passes locked page to __logfs_write_inode. It calls function\nlogfs_get_wblocks() to pre-lock the page. This ensures any further\nattempts to lock the page are ignored (esp from get_erase_count).\n\nAcked-by: Joern Engel \u003cjoern@logfs.org\u003e\nSigned-off-by: Prasad Joshi \u003cprasadjoshi.linux@gmail.com\u003e\n"
    },
    {
      "commit": "1a67aafb5f72a436ca044293309fa7e6351d6a35",
      "tree": "d9e58600148de9d41b478cf815773b746647d15b",
      "parents": [
        "4acdaf27ebe2034c342f3be57ef49aed1ad885ef"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jul 26 01:52:52 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jan 03 22:54:54 2012 -0500"
      },
      "message": "switch -\u003emknod() to umode_t\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "4acdaf27ebe2034c342f3be57ef49aed1ad885ef",
      "tree": "d89a876ee19cd88609a587f8aa6c464a52ee6d98",
      "parents": [
        "18bb1db3e7607e4a997d50991a6f9fa5b0f8722c"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jul 26 01:42:34 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jan 03 22:54:53 2012 -0500"
      },
      "message": "switch -\u003ecreate() to umode_t\n\nvfs_create() ignores everything outside of 16bit subset of its\nmode argument; switching it to umode_t is obviously equivalent\nand it\u0027s the only caller of the method\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "18bb1db3e7607e4a997d50991a6f9fa5b0f8722c",
      "tree": "4ee4e584bc9a67f3ec14ce159d2d7d4a27e68d4a",
      "parents": [
        "8208a22bb8bd3c52ef634b4ff194f14892ab1713"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jul 26 01:41:39 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Tue Jan 03 22:54:53 2012 -0500"
      },
      "message": "switch vfs_mkdir() and -\u003emkdir() to umode_t\n\nvfs_mkdir() gets int, but immediately drops everything that might not\nfit into umode_t and that\u0027s the only caller of -\u003emkdir()...\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "6d6b77f163c7eabedbba00ed2abb7d4a570bff76",
      "tree": "6ce074a7dd5a25fae28ef9de6f59ddee08ea4e61",
      "parents": [
        "dd2a981f46a0903a8770a784f213d4d40bbb6f19"
      ],
      "author": {
        "name": "Miklos Szeredi",
        "email": "mszeredi@suse.cz",
        "time": "Fri Oct 28 14:13:28 2011 +0200"
      },
      "committer": {
        "name": "Christoph Hellwig",
        "email": "hch@serles.lst.de",
        "time": "Wed Nov 02 12:53:43 2011 +0100"
      },
      "message": "filesystems: add missing nlink wrappers\n\nReplace direct i_nlink updates with the respective updater function\n(inc_nlink, drop_nlink, clear_nlink, inode_dec_link_count).\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\n"
    },
    {
      "commit": "a9049376ee05bf966bfe2b081b5071326856890a",
      "tree": "efb3cbfc7760537f201bb28dacbb0d39ec39f04c",
      "parents": [
        "0c1aa9a952c3608eb17bf990466f1491d1ee8b6c"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Fri Jul 08 21:20:11 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Wed Jul 20 01:44:26 2011 -0400"
      },
      "message": "make d_splice_alias(ERR_PTR(err), dentry) \u003d ERR_PTR(err)\n\n... and simplify the living hell out of callers\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "a63ab94d67879bc0630ea9821c582ddf58ba5527",
      "tree": "006f1cfb1262e256cc8af1d5f51bea92247f5e58",
      "parents": [
        "6b419951f1e44c8a46fccfc6551eca9a9980acd6"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Sat Jun 18 20:17:22 2011 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Jun 20 10:44:26 2011 -0400"
      },
      "message": "logfs doesn\u0027t need -\u003epermission() at all\n\n... and never did, what with its -\u003epermission() being what we do by default\nwhen -\u003epermission is NULL...\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "64370e2f9df572977757d70b1ad293b743dd9e20",
      "tree": "10a53f37eabc2c1f6972abfa8780d003540a28c4",
      "parents": [
        "44a8e6364e48ab93a1d86385b5fc9efe81395fa9"
      ],
      "author": {
        "name": "Sage Weil",
        "email": "sage@newdream.net",
        "time": "Fri May 27 13:41:58 2011 -0700"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Sat May 28 01:02:51 2011 -0400"
      },
      "message": "logfs: remove unnecessary dentry_unhash from rmdir, dir rename\n\nlogfs does not have problems with references to unlinked directories.\n\nCC: Joern Engel \u003cjoern@logfs.org\u003e\nCC: logfs@logfs.org\nSigned-off-by: Sage Weil \u003csage@newdream.net\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "e4eaac06bcccb2a70bca6a2de9871882dce2aa14",
      "tree": "ca6736d96294cd6e65a1c3055718bfd5adc7336e",
      "parents": [
        "79bf7c732b5ff75b96022ed9d29181afd3d2509c"
      ],
      "author": {
        "name": "Sage Weil",
        "email": "sage@newdream.net",
        "time": "Tue May 24 13:06:07 2011 -0700"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Thu May 26 07:26:48 2011 -0400"
      },
      "message": "vfs: push dentry_unhash on rename_dir into file systems\n\nOnly a few file systems need this.  Start by pushing it down into each\nrename method (except gfs2 and xfs) so that it can be dealt with on a\nper-fs basis.\n\nAcked-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Sage Weil \u003csage@newdream.net\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "79bf7c732b5ff75b96022ed9d29181afd3d2509c",
      "tree": "74b8cc690f9a37fff02d0685464e1c695a25ef94",
      "parents": [
        "64252c75a2196a0cf1e0d3777143ecfe0e3ae650"
      ],
      "author": {
        "name": "Sage Weil",
        "email": "sage@newdream.net",
        "time": "Tue May 24 13:06:06 2011 -0700"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Thu May 26 07:26:47 2011 -0400"
      },
      "message": "vfs: push dentry_unhash on rmdir into file systems\n\nOnly a few file systems need this.  Start by pushing it down into each\nfs rmdir method (except gfs2 and xfs) so it can be dealt with on a per-fs\nbasis.\n\nThis does not change behavior for any in-tree file systems.\n\nAcked-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Sage Weil \u003csage@newdream.net\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "25985edcedea6396277003854657b5f3cb31a628",
      "tree": "f026e810210a2ee7290caeb737c23cb6472b7c38",
      "parents": [
        "6aba74f2791287ec407e0f92487a725a25908067"
      ],
      "author": {
        "name": "Lucas De Marchi",
        "email": "lucas.demarchi@profusion.mobi",
        "time": "Wed Mar 30 22:57:33 2011 -0300"
      },
      "committer": {
        "name": "Lucas De Marchi",
        "email": "lucas.demarchi@profusion.mobi",
        "time": "Thu Mar 31 11:26:23 2011 -0300"
      },
      "message": "Fix common misspellings\n\nFixes generated by \u0027codespell\u0027 and manually reviewed.\n\nSigned-off-by: Lucas De Marchi \u003clucas.demarchi@profusion.mobi\u003e\n"
    },
    {
      "commit": "b74c79e99389cd79b31fcc08f82c24e492e63c7e",
      "tree": "763c6b412517306670bc625e90035f2d16bb739f",
      "parents": [
        "34286d6662308d82aed891852d04c7c3a2649b16"
      ],
      "author": {
        "name": "Nick Piggin",
        "email": "npiggin@kernel.dk",
        "time": "Fri Jan 07 17:49:58 2011 +1100"
      },
      "committer": {
        "name": "Nick Piggin",
        "email": "npiggin@kernel.dk",
        "time": "Fri Jan 07 17:50:29 2011 +1100"
      },
      "message": "fs: provide rcu-walk aware permission i_ops\n\nSigned-off-by: Nick Piggin \u003cnpiggin@kernel.dk\u003e\n"
    },
    {
      "commit": "7de9c6ee3ecffd99e1628e81a5ea5468f7581a1f",
      "tree": "88787e77ba8a253d0a26aeda4bd5e58532d592e0",
      "parents": [
        "646ec4615cd05972581c9c5342ed7a1e77df17bb"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Sat Oct 23 11:11:40 2010 -0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Oct 25 21:26:11 2010 -0400"
      },
      "message": "new helper: ihold()\n\nClones an existing reference to inode; caller must already hold one.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "6038f373a3dc1f1c26496e60b6c40b164716f07e",
      "tree": "a0d3bbd026eea41b9fc36b8c722cbaf56cd9f825",
      "parents": [
        "1ec5584e3edf9c4bf2c88c846534d19cf986ba11"
      ],
      "author": {
        "name": "Arnd Bergmann",
        "email": "arnd@arndb.de",
        "time": "Sun Aug 15 18:52:59 2010 +0200"
      },
      "committer": {
        "name": "Arnd Bergmann",
        "email": "arnd@arndb.de",
        "time": "Fri Oct 15 15:53:27 2010 +0200"
      },
      "message": "llseek: automatically add .llseek fop\n\nAll file_operations should get a .llseek operation so we can make\nnonseekable_open the default for future file operations without a\n.llseek pointer.\n\nThe three cases that we can automatically detect are no_llseek, seq_lseek\nand default_llseek. For cases where we can we can automatically prove that\nthe file offset is always ignored, we use noop_llseek, which maintains\nthe current behavior of not returning an error from a seek.\n\nNew drivers should normally not use noop_llseek but instead use no_llseek\nand call nonseekable_open at open time.  Existing drivers can be converted\nto do the same when the maintainer knows for certain that no user code\nrelies on calling seek on the device file.\n\nThe generated code is often incorrectly indented and right now contains\ncomments that clarify for each added line why a specific variant was\nchosen. In the version that gets submitted upstream, the comments will\nbe gone and I will manually fix the indentation, because there does not\nseem to be a way to do that using coccinelle.\n\nSome amount of new code is currently sitting in linux-next that should get\nthe same modifications, which I will do at the end of the merge window.\n\nMany thanks to Julia Lawall for helping me learn to write a semantic\npatch that does all this.\n\n\u003d\u003d\u003d\u003d\u003d begin semantic patch \u003d\u003d\u003d\u003d\u003d\n// This adds an llseek\u003d method to all file operations,\n// as a preparation for making no_llseek the default.\n//\n// The rules are\n// - use no_llseek explicitly if we do nonseekable_open\n// - use seq_lseek for sequential files\n// - use default_llseek if we know we access f_pos\n// - use noop_llseek if we know we don\u0027t access f_pos,\n//   but we still want to allow users to call lseek\n//\n@ open1 exists @\nidentifier nested_open;\n@@\nnested_open(...)\n{\n\u003c+...\nnonseekable_open(...)\n...+\u003e\n}\n\n@ open exists@\nidentifier open_f;\nidentifier i, f;\nidentifier open1.nested_open;\n@@\nint open_f(struct inode *i, struct file *f)\n{\n\u003c+...\n(\nnonseekable_open(...)\n|\nnested_open(...)\n)\n...+\u003e\n}\n\n@ read disable optional_qualifier exists @\nidentifier read_f;\nidentifier f, p, s, off;\ntype ssize_t, size_t, loff_t;\nexpression E;\nidentifier func;\n@@\nssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)\n{\n\u003c+...\n(\n   *off \u003d E\n|\n   *off +\u003d E\n|\n   func(..., off, ...)\n|\n   E \u003d *off\n)\n...+\u003e\n}\n\n@ read_no_fpos disable optional_qualifier exists @\nidentifier read_f;\nidentifier f, p, s, off;\ntype ssize_t, size_t, loff_t;\n@@\nssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)\n{\n... when !\u003d off\n}\n\n@ write @\nidentifier write_f;\nidentifier f, p, s, off;\ntype ssize_t, size_t, loff_t;\nexpression E;\nidentifier func;\n@@\nssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)\n{\n\u003c+...\n(\n  *off \u003d E\n|\n  *off +\u003d E\n|\n  func(..., off, ...)\n|\n  E \u003d *off\n)\n...+\u003e\n}\n\n@ write_no_fpos @\nidentifier write_f;\nidentifier f, p, s, off;\ntype ssize_t, size_t, loff_t;\n@@\nssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)\n{\n... when !\u003d off\n}\n\n@ fops0 @\nidentifier fops;\n@@\nstruct file_operations fops \u003d {\n ...\n};\n\n@ has_llseek depends on fops0 @\nidentifier fops0.fops;\nidentifier llseek_f;\n@@\nstruct file_operations fops \u003d {\n...\n .llseek \u003d llseek_f,\n...\n};\n\n@ has_read depends on fops0 @\nidentifier fops0.fops;\nidentifier read_f;\n@@\nstruct file_operations fops \u003d {\n...\n .read \u003d read_f,\n...\n};\n\n@ has_write depends on fops0 @\nidentifier fops0.fops;\nidentifier write_f;\n@@\nstruct file_operations fops \u003d {\n...\n .write \u003d write_f,\n...\n};\n\n@ has_open depends on fops0 @\nidentifier fops0.fops;\nidentifier open_f;\n@@\nstruct file_operations fops \u003d {\n...\n .open \u003d open_f,\n...\n};\n\n// use no_llseek if we call nonseekable_open\n////////////////////////////////////////////\n@ nonseekable1 depends on !has_llseek \u0026\u0026 has_open @\nidentifier fops0.fops;\nidentifier nso ~\u003d \"nonseekable_open\";\n@@\nstruct file_operations fops \u003d {\n...  .open \u003d nso, ...\n+.llseek \u003d no_llseek, /* nonseekable */\n};\n\n@ nonseekable2 depends on !has_llseek @\nidentifier fops0.fops;\nidentifier open.open_f;\n@@\nstruct file_operations fops \u003d {\n...  .open \u003d open_f, ...\n+.llseek \u003d no_llseek, /* open uses nonseekable */\n};\n\n// use seq_lseek for sequential files\n/////////////////////////////////////\n@ seq depends on !has_llseek @\nidentifier fops0.fops;\nidentifier sr ~\u003d \"seq_read\";\n@@\nstruct file_operations fops \u003d {\n...  .read \u003d sr, ...\n+.llseek \u003d seq_lseek, /* we have seq_read */\n};\n\n// use default_llseek if there is a readdir\n///////////////////////////////////////////\n@ fops1 depends on !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\nidentifier readdir_e;\n@@\n// any other fop is used that changes pos\nstruct file_operations fops \u003d {\n... .readdir \u003d readdir_e, ...\n+.llseek \u003d default_llseek, /* readdir is present */\n};\n\n// use default_llseek if at least one of read/write touches f_pos\n/////////////////////////////////////////////////////////////////\n@ fops2 depends on !fops1 \u0026\u0026 !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\nidentifier read.read_f;\n@@\n// read fops use offset\nstruct file_operations fops \u003d {\n... .read \u003d read_f, ...\n+.llseek \u003d default_llseek, /* read accesses f_pos */\n};\n\n@ fops3 depends on !fops1 \u0026\u0026 !fops2 \u0026\u0026 !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\nidentifier write.write_f;\n@@\n// write fops use offset\nstruct file_operations fops \u003d {\n... .write \u003d write_f, ...\n+\t.llseek \u003d default_llseek, /* write accesses f_pos */\n};\n\n// Use noop_llseek if neither read nor write accesses f_pos\n///////////////////////////////////////////////////////////\n\n@ fops4 depends on !fops1 \u0026\u0026 !fops2 \u0026\u0026 !fops3 \u0026\u0026 !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\nidentifier read_no_fpos.read_f;\nidentifier write_no_fpos.write_f;\n@@\n// write fops use offset\nstruct file_operations fops \u003d {\n...\n .write \u003d write_f,\n .read \u003d read_f,\n...\n+.llseek \u003d noop_llseek, /* read and write both use no f_pos */\n};\n\n@ depends on has_write \u0026\u0026 !has_read \u0026\u0026 !fops1 \u0026\u0026 !fops2 \u0026\u0026 !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\nidentifier write_no_fpos.write_f;\n@@\nstruct file_operations fops \u003d {\n... .write \u003d write_f, ...\n+.llseek \u003d noop_llseek, /* write uses no f_pos */\n};\n\n@ depends on has_read \u0026\u0026 !has_write \u0026\u0026 !fops1 \u0026\u0026 !fops2 \u0026\u0026 !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\nidentifier read_no_fpos.read_f;\n@@\nstruct file_operations fops \u003d {\n... .read \u003d read_f, ...\n+.llseek \u003d noop_llseek, /* read uses no f_pos */\n};\n\n@ depends on !has_read \u0026\u0026 !has_write \u0026\u0026 !fops1 \u0026\u0026 !fops2 \u0026\u0026 !has_llseek \u0026\u0026 !nonseekable1 \u0026\u0026 !nonseekable2 \u0026\u0026 !seq @\nidentifier fops0.fops;\n@@\nstruct file_operations fops \u003d {\n...\n+.llseek \u003d noop_llseek, /* no read or write fn */\n};\n\u003d\u003d\u003d\u003d\u003d End semantic patch \u003d\u003d\u003d\u003d\u003d\n\nSigned-off-by: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: Julia Lawall \u003cjulia@diku.dk\u003e\nCc: Christoph Hellwig \u003chch@infradead.org\u003e\n"
    },
    {
      "commit": "02d6d685fc6f2d8b48b133b5a5a43755e005074e",
      "tree": "6fb90bda20e1b36494488c067bfedcc655042712",
      "parents": [
        "2be1f3a73dd02e38e181cf5abacb3d45a6a2d6b8"
      ],
      "author": {
        "name": "Arnd Bergmann",
        "email": "arnd@arndb.de",
        "time": "Tue Apr 27 22:30:06 2010 +0200"
      },
      "committer": {
        "name": "Frederic Weisbecker",
        "email": "fweisbec@gmail.com",
        "time": "Sat Aug 14 00:24:24 2010 +0200"
      },
      "message": "logfs: kill BKL\n\nlogfs does not need the BKL, so use -\u003eunlocked_ioctl instead\nof -\u003eioctl in file operations.\n\nSigned-off-by: Arnd Bergmann \u003carnd@arndb.de\u003e\nSigned-off-by: Joern Engel \u003cjoern@logfs.org\u003e\n[ fixed trivial conflict ]\nSigned-off-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\n"
    },
    {
      "commit": "256249584bda1a9357e2d29987a37f5b2df035f6",
      "tree": "266fa8425efb96dcb484e7fceb3a2d68610a1ba1",
      "parents": [
        "0e4f6a791b1e8cfde75a74e2f885642ecb3fe9d8"
      ],
      "author": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Sun Jul 04 12:23:11 2010 +0400"
      },
      "committer": {
        "name": "Al Viro",
        "email": "viro@zeniv.linux.org.uk",
        "time": "Mon Aug 09 16:47:28 2010 -0400"
      },
      "message": "fix leak in __logfs_create()\n\nif kmalloc fails, we still need to drop the inode, as we do\non other failure exits.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n"
    },
    {
      "commit": "a8cd4561ea176f51e9f4707873ca4eff8fd5ee70",
      "tree": "82f4f90f732fcc06480073bf494bab503fc24d62",
      "parents": [
        "7d7fb0e6eb78600e5d4fb0f28858e97d38ef6bbf"
      ],
      "author": {
        "name": "Anand Gadiyar",
        "email": "gadiyar@ti.com",
        "time": "Mon May 10 14:51:19 2010 +0530"
      },
      "committer": {
        "name": "Jiri Kosina",
        "email": "jkosina@suse.cz",
        "time": "Mon May 10 11:56:30 2010 +0200"
      },
      "message": "fix \"seperate\" typos in comments\n\ns/seperate/separate\n\nSigned-off-by: Anand Gadiyar \u003cgadiyar@ti.com\u003e\nSigned-off-by: Jiri Kosina \u003cjkosina@suse.cz\u003e\n"
    },
    {
      "commit": "336f5899d287f06d8329e208fc14ce50f7ec9698",
      "tree": "9b762d450d5eb248a6ff8317badb7e223d93ed58",
      "parents": [
        "a4ab2773205e8b94c18625455f85e3b6bb9d7ad6",
        "db217dece3003df0841bacf9556b5c06aa097dae"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Mon Apr 05 11:37:28 2010 +0900"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Mon Apr 05 11:37:28 2010 +0900"
      },
      "message": "Merge branch \u0027master\u0027 into export-slabh\n"
    },
    {
      "commit": "5a0e3ad6af8660be21ca98a971cd00f331318c05",
      "tree": "5bfb7be11a03176a87296a43ac6647975c00a1d1",
      "parents": [
        "ed391f4ebf8f701d3566423ce8f17e614cde9806"
      ],
      "author": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Wed Mar 24 17:04:11 2010 +0900"
      },
      "committer": {
        "name": "Tejun Heo",
        "email": "tj@kernel.org",
        "time": "Tue Mar 30 22:02:32 2010 +0900"
      },
      "message": "include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h\n\npercpu.h is included by sched.h and module.h and thus ends up being\nincluded when building most .c files.  percpu.h includes slab.h which\nin turn includes gfp.h making everything defined by the two files\nuniversally available and complicating inclusion dependencies.\n\npercpu.h -\u003e slab.h dependency is about to be removed.  Prepare for\nthis change by updating users of gfp and slab facilities include those\nheaders directly instead of assuming availability.  As this conversion\nneeds to touch large number of source files, the following script is\nused as the basis of conversion.\n\n  http://userweb.kernel.org/~tj/misc/slabh-sweep.py\n\nThe script does the followings.\n\n* Scan files for gfp and slab usages and update includes such that\n  only the necessary includes are there.  ie. if only gfp is used,\n  gfp.h, if slab is used, slab.h.\n\n* When the script inserts a new include, it looks at the include\n  blocks and try to put the new include such that its order conforms\n  to its surrounding.  It\u0027s put in the include block which contains\n  core kernel includes, in the same order that the rest are ordered -\n  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there\n  doesn\u0027t seem to be any matching order.\n\n* If the script can\u0027t find a place to put a new include (mostly\n  because the file doesn\u0027t have fitting include block), it prints out\n  an error message indicating which .h file needs to be added to the\n  file.\n\nThe conversion was done in the following steps.\n\n1. The initial automatic conversion of all .c files updated slightly\n   over 4000 files, deleting around 700 includes and adding ~480 gfp.h\n   and ~3000 slab.h inclusions.  The script emitted errors for ~400\n   files.\n\n2. Each error was manually checked.  Some didn\u0027t need the inclusion,\n   some needed manual addition while adding it to implementation .h or\n   embedding .c file was more appropriate for others.  This step added\n   inclusions to around 150 files.\n\n3. The script was run again and the output was compared to the edits\n   from #2 to make sure no file was left behind.\n\n4. Several build tests were done and a couple of problems were fixed.\n   e.g. lib/decompress_*.c used malloc/free() wrappers around slab\n   APIs requiring slab.h to be added manually.\n\n5. The script was run on all .h files but without automatically\n   editing them as sprinkling gfp.h and slab.h inclusions around .h\n   files could easily lead to inclusion dependency hell.  Most gfp.h\n   inclusion directives were ignored as stuff from gfp.h was usually\n   wildly available and often used in preprocessor macros.  Each\n   slab.h inclusion directive was examined and added manually as\n   necessary.\n\n6. percpu.h was updated not to include slab.h.\n\n7. Build test were done on the following configurations and failures\n   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my\n   distributed build env didn\u0027t work with gcov compiles) and a few\n   more options had to be turned off depending on archs to make things\n   build (like ipr on powerpc/64 which failed due to missing writeq).\n\n   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.\n   * powerpc and powerpc64 SMP allmodconfig\n   * sparc and sparc64 SMP allmodconfig\n   * ia64 SMP allmodconfig\n   * s390 SMP allmodconfig\n   * alpha SMP allmodconfig\n   * um on x86_64 SMP allmodconfig\n\n8. percpu.h modifications were reverted so that it could be applied as\n   a separate patch and serve as bisection point.\n\nGiven the fact that I had only a couple of failures from tests on step\n6, I\u0027m fairly confident about the coverage of this conversion patch.\nIf there is a breakage, it\u0027s likely to be something in one of the arch\nheaders which should be easily discoverable easily on most builds of\nthe specific arch.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nGuess-its-ok-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Lee Schermerhorn \u003cLee.Schermerhorn@hp.com\u003e\n"
    },
    {
      "commit": "e326068806ee044cc617b1dc24be1293fca3fbf6",
      "tree": "d82ee6e4b4d885a068bf35f2b29fd83a58e082e2",
      "parents": [
        "e07bf553f37cd4fa470b499ff34d800956df2d48"
      ],
      "author": {
        "name": "Joern Engel",
        "email": "joern@logfs.org",
        "time": "Wed Mar 17 16:00:07 2010 +0100"
      },
      "committer": {
        "name": "Joern Engel",
        "email": "joern@logfs.org",
        "time": "Sat Mar 27 11:19:15 2010 +0100"
      },
      "message": "Prevent schedule while atomic in __logfs_readdir\n\nApparently filldir can sleep, which forbids kmap_atomic.\n\nSigned-off-by: Joern Engel \u003cjoern@logfs.org\u003e\n"
    },
    {
      "commit": "30835cd074381048b0ea5d53e27725bbd0bdf5b7",
      "tree": "4dca9f2ef0660542e544066ce60ee5bed63bb98e",
      "parents": [
        "ddfd1f04b7bc557c1fe9b110e99cebb2e19d4993"
      ],
      "author": {
        "name": "Joern Engel",
        "email": "joern@logfs.org",
        "time": "Sat Nov 28 13:14:08 2009 +0100"
      },
      "committer": {
        "name": "Joern Engel",
        "email": "joern@logfs.org",
        "time": "Sat Nov 28 13:14:08 2009 +0100"
      },
      "message": "[LogFS] Prevent 64bit divisions in hash_index\n\nRandy Dunlap caught this built error on i386:\n\nfs/built-in.o: In function `hash_index\u0027:\ndir.c:(.text+0x6c1f2): undefined reference to `__umoddi3\u0027\n"
    },
    {
      "commit": "ddfd1f04b7bc557c1fe9b110e99cebb2e19d4993",
      "tree": "797746cc7cd2334ae16014ed547f7593846a14f5",
      "parents": [
        "ef6ada3de49074a913fb72f163657158be2c0e98"
      ],
      "author": {
        "name": "Joern Engel",
        "email": "joern@logfs.org",
        "time": "Mon Nov 23 14:29:12 2009 +0100"
      },
      "committer": {
        "name": "Joern Engel",
        "email": "joern@logfs.org",
        "time": "Mon Nov 23 14:29:12 2009 +0100"
      },
      "message": "[LogFS] Plug memory leak on error paths\n\nSpotted by Dan Carpenter.\n"
    },
    {
      "commit": "5db53f3e80dee2d9dff5e534f9e9fe1db17c9936",
      "tree": "066f2873eeb7eb86466f6389e45892d957db3de2",
      "parents": [
        "66b00a7c93ec782d118d2c03bd599cfd041e80a1"
      ],
      "author": {
        "name": "Joern Engel",
        "email": "joern@logfs.org",
        "time": "Fri Nov 20 20:13:39 2009 +0100"
      },
      "committer": {
        "name": "Joern Engel",
        "email": "joern@logfs.org",
        "time": "Fri Nov 20 20:13:39 2009 +0100"
      },
      "message": "[LogFS] add new flash file system\n\nThis is a new flash file system. See\nDocumentation/filesystems/logfs.txt\n\nSigned-off-by: Joern Engel \u003cjoern@logfs.org\u003e\n"
    }
  ]
}