)]}'
{
  "log": [
    {
      "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": "2b18ab36cf7e956fb5b5ee12847e94fc66d496f4",
      "tree": "3abdb07b9caa17e902f43cec478a42e8d9ab4990",
      "parents": [
        "dc880abef75e7c62c9048171f5112500f36a9244"
      ],
      "author": {
        "name": "Arnd Bergmann",
        "email": "arnd@arndb.de",
        "time": "Tue Jul 06 19:05:31 2010 +0200"
      },
      "committer": {
        "name": "Arnd Bergmann",
        "email": "arnd@arndb.de",
        "time": "Thu Sep 16 10:33:08 2010 +0200"
      },
      "message": "net/wireless: use generic_file_llseek in debugfs\n\nThe default llseek operation is changing from\ndefault_llseek to no_llseek, so all code relying on\nthe current behaviour needs to make that explicit.\n\nThe wireless driver infrastructure and some of the drivers\nmake use of generated debugfs files, so they cannot\nbe converted by our script that automatically determines\nthe right operation.\n\nAll these files use debugfs and they typically rely\non simple_read_from_buffer, so the best llseek operation\nhere is generic_file_llseek.\n\nSigned-off-by: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: \"John W. Linville\" \u003clinville@tuxdriver.com\u003e\nCc: linux-wireless@vger.kernel.org\nCc: netdev@vger.kernel.org\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": "7bcfaf2f431c09c51fe776fc06638b25d3b421c5",
      "tree": "27f767335566826f11f0134b97ee76b58d9bcf90",
      "parents": [
        "2c0d6100da3ee9b0f0cc46add9bb8a8161299a92"
      ],
      "author": {
        "name": "Johannes Berg",
        "email": "johannes@sipsolutions.net",
        "time": "Tue Oct 27 12:59:03 2009 +0100"
      },
      "committer": {
        "name": "John W. Linville",
        "email": "linville@tuxdriver.com",
        "time": "Fri Oct 30 16:49:18 2009 -0400"
      },
      "message": "cfg80211/mac80211: use debugfs_remove_recursive\n\nWe can save a lot of code and pointers in the structs\nby using debugfs_remove_recursive().\n\nFirst, change cfg80211 to use debugfs_remove_recursive()\nso that drivers do not need to clean up any files they\nadded to the per-wiphy debugfs (if and only if they are\nok to be accessed until after wiphy_unregister!).\n\nThen also make mac80211 use debugfs_remove_recursive()\nwhere necessary -- it need not remove per-wiphy files\nas cfg80211 now removes those, but netdev etc. files\nstill need to be handled but can now be removed without\nneeding struct dentry pointers to all of them.\n\nSigned-off-by: Johannes Berg \u003cjohannes@sipsolutions.net\u003e\nSigned-off-by: John W. Linville \u003clinville@tuxdriver.com\u003e\n"
    },
    {
      "commit": "79c97e97aed7f760d2826c7daf2d42d8eefe9838",
      "tree": "bf6d18d0de2c0168a292f05eb6f7296c15278b8b",
      "parents": [
        "667503ddcb96f3b10211f997fe55907fa7509841"
      ],
      "author": {
        "name": "Johannes Berg",
        "email": "johannes@sipsolutions.net",
        "time": "Tue Jul 07 03:56:12 2009 +0200"
      },
      "committer": {
        "name": "John W. Linville",
        "email": "linville@tuxdriver.com",
        "time": "Fri Jul 10 15:02:33 2009 -0400"
      },
      "message": "cfg80211: clean up naming once and for all\n\nWe\u0027ve named the registered devices \u0027drv\u0027 sometimes,\nthinking of \"driver\", which is not what it is, it\u0027s\nthe internal representation of a wiphy, i.e. a\ndevice. Let\u0027s clean up the naming once and and use\n\u0027rdev\u0027 aka \u0027registered device\u0027 everywhere.\n\nSigned-off-by: Johannes Berg \u003cjohannes@sipsolutions.net\u003e\nSigned-off-by: John W. Linville \u003clinville@tuxdriver.com\u003e\n"
    },
    {
      "commit": "80a3511d70e8fc7ed3fe4417d7b0bf6c3f642f64",
      "tree": "df35f2640eea3e9b7772dcfd112eba98379bb390",
      "parents": [
        "1ac61302dcd18880e28c29e5728cd4d0efeb5366"
      ],
      "author": {
        "name": "Luis R. Rodriguez",
        "email": "lrodriguez@atheros.com",
        "time": "Sat May 02 00:39:30 2009 -0400"
      },
      "committer": {
        "name": "John W. Linville",
        "email": "linville@tuxdriver.com",
        "time": "Wed May 20 14:46:23 2009 -0400"
      },
      "message": "cfg80211: add debugfs HT40 allow map\n\nHere\u0027s a screenshot of what this looks like with ath9k:\n\nmcgrof@pogo /debug/ieee80211/phy0 $ cat ht40allow_map\n2412 HT40  +\n2417 HT40  +\n2422 HT40  +\n2427 HT40  +\n2432 HT40 -+\n2437 HT40 -+\n2442 HT40 -+\n2447 HT40 -\n2452 HT40 -\n2457 HT40 -\n2462 HT40 -\n2467 Disabled\n2472 Disabled\n2484 Disabled\n5180 HT40  +\n5200 HT40 -+\n5220 HT40 -+\n5240 HT40 -+\n5260 HT40 -+\n5280 HT40 -+\n5300 HT40 -+\n5320 HT40 -\n5500 HT40  +\n5520 HT40 -+\n5540 HT40 -+\n5560 HT40 -+\n5580 HT40 -+\n5600 HT40 -+\n5620 HT40 -+\n5640 HT40 -+\n5660 HT40 -+\n5680 HT40 -+\n5700 HT40 -\n5745 HT40  +\n5765 HT40 -+\n5785 HT40 -+\n5805 HT40 -+\n5825 HT40 -\n\nSigned-off-by: Luis R. Rodriguez \u003clrodriguez@atheros.com\u003e\nSigned-off-by: John W. Linville \u003clinville@tuxdriver.com\u003e\n"
    },
    {
      "commit": "1ac61302dcd18880e28c29e5728cd4d0efeb5366",
      "tree": "2fa7f137b67df3f966408b016745083cae7cdefa",
      "parents": [
        "294196ab22c91da974ba1f40d0a7cdcb0b3e6bc3"
      ],
      "author": {
        "name": "Luis R. Rodriguez",
        "email": "lrodriguez@atheros.com",
        "time": "Sat May 02 00:37:21 2009 -0400"
      },
      "committer": {
        "name": "John W. Linville",
        "email": "linville@tuxdriver.com",
        "time": "Wed May 20 14:46:23 2009 -0400"
      },
      "message": "mac80211/cfg80211: move wiphy specific debugfs entries to cfg80211\n\nThis moves the cfg80211 specific stuff to new cfg80211 debugfs\nentries. Non-mac80211 will also get these entries now. There were\nonly 4 which we take:\n\nrts_threshold\nfragmentation_threshold\nshort_retry_limit\nlong_retry_limit\n\nSigned-off-by: Luis R. Rodriguez \u003clrodriguez@atheros.com\u003e\nSigned-off-by: John W. Linville \u003clinville@tuxdriver.com\u003e\n"
    }
  ]
}