)]}'
{
  "log": [
    {
      "commit": "092e0e7e520a1fca03e13c9f2d157432a8657ff2",
      "tree": "451897252c4c08c4b5a8ef535da156f1e817e80b",
      "parents": [
        "79f14b7c56d3b3ba58f8b43d1f70b9b71477a800",
        "776c163b1b93c8dfa5edba885bc2bfbc2d228a5f"
      ],
      "author": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Oct 22 10:52:56 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Oct 22 10:52:56 2010 -0700"
      },
      "message": "Merge branch \u0027llseek\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl\n\n* \u0027llseek\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl:\n  vfs: make no_llseek the default\n  vfs: don\u0027t use BKL in default_llseek\n  llseek: automatically add .llseek fop\n  libfs: use generic_file_llseek for simple_attr\n  mac80211: disallow seeks in minstrel debug code\n  lirc: make chardev nonseekable\n  viotape: use noop_llseek\n  raw: use explicit llseek file operations\n  ibmasmfs: use generic_file_llseek\n  spufs: use llseek in all file operations\n  arm/omap: use generic_file_llseek in iommu_debug\n  lkdtm: use generic_file_llseek in debugfs\n  net/wireless: use generic_file_llseek in debugfs\n  drm: use noop_llseek\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": "399f1e30ac17b77d383444aff480c7390f5adf2a",
      "tree": "da24eab64af0bef6fa4f8fba1c3fedb435a65418",
      "parents": [
        "87400e5406e215e9a1b43cf67794fbb34c15c342"
      ],
      "author": {
        "name": "Ira W. Snyder",
        "email": "iws@ovro.caltech.edu",
        "time": "Thu Sep 30 15:15:27 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Oct 01 10:50:58 2010 -0700"
      },
      "message": "kfifo: fix scatterlist usage\n\nThe kfifo_dma family of functions use sg_mark_end() on the last element in\ntheir scatterlist.  This forces use of a fresh scatterlist for each DMA\noperation, which makes recycling a single scatterlist impossible.\n\nChange the behavior of the kfifo_dma functions to match the usage of the\ndma_map_sg function.  This means that users must respect the returned\nnents value.  The sample code is updated to reflect the change.\n\nThis bug is trivial to cause: call kfifo_dma_in_prepare() such that it\nprepares a scatterlist with a single entry comprising the whole fifo.\nThis is the case when you map the entirety of a newly created empty fifo.\nThis causes the setup_sgl() function to mark the first scatterlist entry\nas the end of the chain, no matter what comes after it.\n\nAfterwards, add and remove some data from the fifo such that another call\nto kfifo_dma_in_prepare() will create two scatterlist entries.  It returns\nnents\u003d2.  However, due to the previous sg_mark_end() call, sg_is_last()\nwill now return true for the first scatterlist element.  This causes the\nsample code to print a single scatterlist element when it should print\ntwo.\n\nBy removing the call to sg_mark_end(), we make the API as similar as\npossible to the DMA mapping API.  All users are required to respect the\nreturned nents.\n\nSigned-off-by: Ira W. Snyder \u003ciws@ovro.caltech.edu\u003e\nCc: Stefani Seibold \u003cstefani@seibold.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "a25effa4d265eb5028c7d4a92a0ddd9267c3c43d",
      "tree": "207c392483a80d7b21fdb92289c5c1b3e49c961a",
      "parents": [
        "d83a71c4219191a9a881318ae5ca9b39aa1d0540"
      ],
      "author": {
        "name": "Andrea Righi",
        "email": "arighi@develer.com",
        "time": "Thu Aug 19 14:13:30 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Aug 20 09:34:54 2010 -0700"
      },
      "message": "kfifo: add explicit error checking in all the examples\n\nProvide a check in all the kfifo examples to validate the correct\nexecution of each testcase.\n\nSigned-off-by: Andrea Righi \u003carighi@develer.com\u003e\nAcked-by: Stefani Seibold \u003cstefani@seibold.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "d83a71c4219191a9a881318ae5ca9b39aa1d0540",
      "tree": "8556b81fb6a07e53735f4984780f8a8caf133383",
      "parents": [
        "7b34d5257a90c419d67c1c3b52f87a679845ef1e"
      ],
      "author": {
        "name": "Andrea Righi",
        "email": "arighi@develer.com",
        "time": "Thu Aug 19 14:13:30 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Aug 20 09:34:54 2010 -0700"
      },
      "message": "kfifo: fix a memory leak in dma example\n\nWe use a dynamically allocated kfifo in the dma example, so we need to\nfree it when unloading the module.\n\nSigned-off-by: Andrea Righi \u003carighi@develer.com\u003e\nAcked-by: Stefani Seibold \u003cstefani@seibold.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "7b34d5257a90c419d67c1c3b52f87a679845ef1e",
      "tree": "f5b0a4c3d3c52155f026cf5323ea4f8b9ea6fd55",
      "parents": [
        "2aaf2092c168fc02df0645415f524b357ee7ec2e"
      ],
      "author": {
        "name": "Andrea Righi",
        "email": "arighi@develer.com",
        "time": "Thu Aug 19 14:13:29 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Aug 20 09:34:54 2010 -0700"
      },
      "message": "kfifo: fix kernel BUG in dma example\n\nThe scatterlist is used uninitialized in kfifo_dma_in_prepare().  This\ntriggers the following bug if CONFIG_DEBUG_SG\u003dy:\n\n  ------------[ cut here ]------------\n  kernel BUG at include/linux/scatterlist.h:65!\n  invalid opcode: 0000 [#1] PREEMPT SMP\n  ...\n  Call Trace:\n   [\u003cffffffff810a1eab\u003e] setup_sgl+0x6b/0xe0\n   [\u003cffffffffa03d7000\u003e] ? example_init+0x0/0x265 [dma_example]\n   [\u003cffffffff810a2021\u003e] __kfifo_dma_in_prepare+0x21/0x30\n   [\u003cffffffffa03d7124\u003e] example_init+0x124/0x265 [dma_example]\n   [\u003cffffffff810f9c55\u003e] ? trace_module_notify+0x25/0x370\n   [\u003cffffffff81110c6e\u003e] ? free_pages_prepare+0x11e/0x1e0\n   [\u003cffffffff8106f2b1\u003e] ? get_parent_ip+0x11/0x50\n   [\u003cffffffff810f9c55\u003e] ? trace_module_notify+0x25/0x370\n   [\u003cffffffff810b65fd\u003e] ? trace_hardirqs_on+0xd/0x10\n   [\u003cffffffff814beade\u003e] ? mutex_unlock+0xe/0x10\n   [\u003cffffffff810f9c71\u003e] ? trace_module_notify+0x41/0x370\n   [\u003cffffffff810a77d5\u003e] ? __blocking_notifier_call_chain+0x45/0x80\n   [\u003cffffffff81137b7a\u003e] ? vfree+0x2a/0x30\n   [\u003cffffffff810a6ac3\u003e] ? up_read+0x23/0x40\n   [\u003cffffffff810a77f5\u003e] ? __blocking_notifier_call_chain+0x65/0x80\n   [\u003cffffffff810001e3\u003e] do_one_initcall+0x43/0x180\n   [\u003cffffffff810c577a\u003e] sys_init_module+0xba/0x200\n   [\u003cffffffff8103819b\u003e] system_call_fastpath+0x16/0x1b\n  RIP  [\u003cffffffff810a1e31\u003e] setup_sgl_buf+0x1a1/0x1b0\n   RSP \u003cffff88006720dc98\u003e\n  ---[ end trace a72b979fd3c1d3a5 ]---\n\nAdd the proper initialization to avoid the bug.\n\nSigned-off-by: Andrea Righi \u003carighi@develer.com\u003e\nAcked-by: Stefani Seibold \u003cstefani@seibold.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "2aaf2092c168fc02df0645415f524b357ee7ec2e",
      "tree": "998b8c3f82abb46a5a1c297a20ea0d5c4a7c0408",
      "parents": [
        "5ddf83912c8b49a24ab0841f6d77f33781dcf10f"
      ],
      "author": {
        "name": "Andrea Righi",
        "email": "arighi@develer.com",
        "time": "Thu Aug 19 14:13:29 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Aug 20 09:34:54 2010 -0700"
      },
      "message": "kfifo: add explicit error checking in byte stream example\n\nProvide a static array of expected items that kfifo should contain at the\nend of the test to validate it.\n\nSigned-off-by: Andrea Righi \u003carighi@develer.com\u003e\nCc: Stefani Seibold \u003cstefani@seibold.net\u003e\nCc: Greg KH \u003cgreg@kroah.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "5ddf83912c8b49a24ab0841f6d77f33781dcf10f",
      "tree": "e3a9b61f4d79ac9ea57cb9775fa7c29ae76b4f33",
      "parents": [
        "b35de43b31040828f83046f40fd34ba33146409d"
      ],
      "author": {
        "name": "Andrea Righi",
        "email": "arighi@develer.com",
        "time": "Thu Aug 19 14:13:28 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Fri Aug 20 09:34:54 2010 -0700"
      },
      "message": "kfifo: add kfifo_skip() testcase\n\nAdd a testcase for kfifo_skip() to the byte stream fifo example.\n\nSigned-off-by: Andrea Righi \u003carighi@develer.com\u003e\nCc: Greg KH \u003cgreg@kroah.com\u003e\nAcked-by: Stefani Seibold \u003cstefani@seibold.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    },
    {
      "commit": "5bf2b19320ec31d094d7370fdf536f7fd91fd799",
      "tree": "47052fd9bdb0969d4a4a7d430695388094409964",
      "parents": [
        "2e956fb320568cc70861761483e2f0e2db75fd66"
      ],
      "author": {
        "name": "Stefani Seibold",
        "email": "stefani@seibold.net",
        "time": "Tue Aug 10 18:03:39 2010 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@linux-foundation.org",
        "time": "Wed Aug 11 08:59:23 2010 -0700"
      },
      "message": "kfifo: add example files to the kernel sample directory\n\nAdd four examples to the kernel sample directory.\n\nIt shows how to handle:\n- a byte stream fifo\n- a integer type fifo\n- a dynamic record sized fifo\n- the fifo DMA functions\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Stefani Seibold \u003cstefani@seibold.net\u003e\nCc: Greg KH \u003cgreg@kroah.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n"
    }
  ]
}