)]}' { "log": [ { "commit": "bed9759b2e6bd938097389f6bd2ac8d622fa3884", "tree": "5586289865b6d15a4ef5f82966684a651a8bcf0d", "parents": [ "a18b630d1becdf1a087de644fea080c1977bcf10" ], "author": { "name": "Denis Cheng", "email": "crquan@gmail.com", "time": "Wed Feb 06 01:37:35 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Feb 06 10:41:07 2008 -0800" }, "message": "drivers/char: use LIST_HEAD instead of LIST_HEAD_INIT\n\nsingle list_head variable initialized with LIST_HEAD_INIT could almost\nalways can be replaced with LIST_HEAD declaration, this shrinks the code\nand looks better.\n\nSigned-off-by: Denis Cheng \u003ccrquan@gmail.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Corey Minyard \u003cminyard@acm.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8dfba4d71b77bca83a6f9943fc8e53439310cffd", "tree": "d18b1c73663e9f6e83b8c177118ffb6121acbc3b", "parents": [ "b92b1c5725d028ead3946ac8af5a5614155710b3" ], "author": { "name": "Joe Perches", "email": "joe@perches.com", "time": "Sun Feb 03 17:11:42 2008 +0200" }, "committer": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Sun Feb 03 17:11:42 2008 +0200" }, "message": "drivers/char/: Spelling fixes\n\nSigned-off-by: Joe Perches \u003cjoe@perches.com\u003e\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\n" }, { "commit": "f7eb12c626d4375faf03039261546bd19c1325fd", "tree": "c20d7176111beab9bd153d9a4c4ca817a1624c4b", "parents": [ "12b20ded6f980d9161b1c6b062560b65a7295e1c" ], "author": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Wed Nov 28 10:46:22 2007 -0800" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Thu Jan 24 20:40:09 2008 -0800" }, "message": "kobject: convert hvcs to use kref, not kobject\n\nhvcs is using a kobject only for reference counting, nothing else. So\nswitch it to use a kref instead, which is all that is needed, and is\nmuch smaller.\n\nCc: Anton Blanchard \u003canton@au.ibm.com\u003e\nCc: Paul Mackerras \u003cpaulus@au.ibm.com\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Ryan S. Arnold \u003crsa@us.ibm.com\u003e\nCc: Kay Sievers \u003ckay.sievers@vrfy.org\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n\n" }, { "commit": "b1c30115f4861c9dd2dcaaac2a01acc67dd4cf94", "tree": "3c42992b33f425f6b99a61a18e8fd3d22bf8b774", "parents": [ "8bf8df7120006b8c97ad3a9fcc79e2ba894c46dd" ], "author": { "name": "Stephen Rothwell", "email": "sfr@canb.auug.org.au", "time": "Sun Jul 22 00:25:00 2007 +1000" }, "committer": { "name": "Paul Mackerras", "email": "paulus@samba.org", "time": "Sun Jul 22 21:30:59 2007 +1000" }, "message": "[POWERPC] hvcs: Make some things static and const\n\nSigned-off-by: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\nSigned-off-by: Paul Mackerras \u003cpaulus@samba.org\u003e\n" }, { "commit": "dd00cc486ab1c17049a535413d1751ef3482141c", "tree": "d90ff69ea06792b9284f2f2665c96624f121b88a", "parents": [ "3b5ad0797c0e4049001f961a8b58f1d0ce532072" ], "author": { "name": "Yoann Padioleau", "email": "padator@wanadoo.fr", "time": "Thu Jul 19 01:49:03 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 10:04:50 2007 -0700" }, "message": "some kmalloc/memset -\u003ekzalloc (tree wide)\n\nTransform some calls to kmalloc/memset to a single kzalloc (or kcalloc).\n\nHere is a short excerpt of the semantic patch performing\nthis transformation:\n\n@@\ntype T2;\nexpression x;\nidentifier f,fld;\nexpression E;\nexpression E1,E2;\nexpression e1,e2,e3,y;\nstatement S;\n@@\n\n x \u003d\n- kmalloc\n+ kzalloc\n (E1,E2)\n ... when !\u003d \\(x-\u003efld\u003dE;\\|y\u003df(...,x,...);\\|f(...,x,...);\\|x\u003dE;\\|while(...) S\\|for(e1;e2;e3) S\\)\n- memset((T2)x,0,E1);\n\n@@\nexpression E1,E2,E3;\n@@\n\n- kzalloc(E1 * E2,E3)\n+ kcalloc(E1,E2,E3)\n\n[akpm@linux-foundation.org: get kcalloc args the right way around]\nSigned-off-by: Yoann Padioleau \u003cpadator@wanadoo.fr\u003e\nCc: Richard Henderson \u003crth@twiddle.net\u003e\nCc: Ivan Kokshaysky \u003cink@jurassic.park.msu.ru\u003e\nAcked-by: Russell King \u003crmk@arm.linux.org.uk\u003e\nCc: Bryan Wu \u003cbryan.wu@analog.com\u003e\nAcked-by: Jiri Slaby \u003cjirislaby@gmail.com\u003e\nCc: Dave Airlie \u003cairlied@linux.ie\u003e\nAcked-by: Roland Dreier \u003crolandd@cisco.com\u003e\nCc: Jiri Kosina \u003cjkosina@suse.cz\u003e\nAcked-by: Dmitry Torokhov \u003cdtor@mail.ru\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nAcked-by: Mauro Carvalho Chehab \u003cmchehab@infradead.org\u003e\nAcked-by: Pierre Ossman \u003cdrzeus-list@drzeus.cx\u003e\nCc: Jeff Garzik \u003cjeff@garzik.org\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nAcked-by: Greg KH \u003cgreg@kroah.com\u003e\nCc: James Bottomley \u003cJames.Bottomley@steeleye.com\u003e\nCc: \"Antonino A. Daplas\" \u003cadaplas@pol.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "606d099cdd1080bbb50ea50dc52d98252f8f10a1", "tree": "80d17450a5fb78effce3f4312f672c058658e004", "parents": [ "edc6afc5496875a640bef0913604be7550c1795d" ], "author": { "name": "Alan Cox", "email": "alan@lxorguk.ukuu.org.uk", "time": "Fri Dec 08 02:38:45 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Fri Dec 08 08:28:57 2006 -0800" }, "message": "[PATCH] tty: switch to ktermios\n\nThis is the grungy swap all the occurrences in the right places patch that\ngoes with the updates. At this point we have the same functionality as\nbefore (except that sgttyb() returns speeds not zero) and are ready to\nbegin turning new stuff on providing nobody reports lots of bugs\n\nIf you are a tty driver author converting an out of tree driver the only\nimpact should be termios-\u003ektermios name changes for the speed/property\nsetting functions from your upper layers.\n\nIf you are implementing your own TCGETS function before then your driver\nwas broken already and its about to get a whole lot more painful for you so\nplease fix it 8)\n\nAlso fill in c_ispeed/ospeed on init for most devices, although the current\ncode will do this for you anyway but I\u0027d like eventually to lose that extra\nparanoia\n\n[akpm@osdl.org: bluetooth fix]\n[mp3@de.ibm.com: sclp fix]\n[mp3@de.ibm.com: warning fix for tty3270]\n[hugh@veritas.com: fix tty_ioctl powerpc build]\n[jdike@addtoit.com: uml: fix -\u003eset_termios declaration]\nSigned-off-by: Alan Cox \u003calan@redhat.com\u003e\nSigned-off-by: Martin Peschke \u003cmp3@de.ibm.com\u003e\nAcked-by: Peter Oberparleiter \u003coberpar@de.ibm.com\u003e\nCc: Cornelia Huck \u003ccornelia.huck@de.ibm.com\u003e\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Jeff Dike \u003cjdike@addtoit.com\u003e\nCc: Paolo \u0027Blaisorblade\u0027 Giarrusso \u003cblaisorblade@yahoo.it\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "c15bb296403f1ce448384d58742e0dc04f49d664", "tree": "911efea27934319e4b35e6c389901ad495b3198f", "parents": [ "940cc2df935d00e704c7b8366bdaedda379abf85" ], "author": { "name": "Linas Vepstas", "email": "linas@austin.ibm.com", "time": "Wed Dec 06 20:38:07 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.osdl.org", "time": "Thu Dec 07 08:39:38 2006 -0800" }, "message": "[PATCH] HVCS char driver janitoring: move block of code\n\nMove a block of code from the bottom of the file to the top, which is needed\nto enable the cleanup.\n\nSigned-off-by: Linas Vepstas \u003clinas@austin.ibm.com\u003e\nCc: Ryan S. Arnold \u003crsa@us.ibm.com\u003e\nCc: Michael Ellerman \u003cmichael@ellerman.id.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "7d12e780e003f93433d49ce78cfedf4b4c52adc5", "tree": "6748550400445c11a306b132009f3001e3525df8", "parents": [ "da482792a6d1a3fbaaa25fae867b343fb4db3246" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Thu Oct 05 14:55:46 2006 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@warthog.cambridge.redhat.com", "time": "Thu Oct 05 15:10:12 2006 +0100" }, "message": "IRQ: Maintain regs pointer globally rather than passing to IRQ handlers\n\nMaintain a per-CPU global \"struct pt_regs *\" variable which can be used instead\nof passing regs around manually through all ~1800 interrupt handlers in the\nLinux kernel.\n\nThe regs pointer is used in few places, but it potentially costs both stack\nspace and code to pass it around. On the FRV arch, removing the regs parameter\nfrom all the genirq function results in a 20% speed up of the IRQ exit path\n(ie: from leaving timer_interrupt() to leaving do_IRQ()).\n\nWhere appropriate, an arch may override the generic storage facility and do\nsomething different with the variable. On FRV, for instance, the address is\nmaintained in GR28 at all times inside the kernel as part of general exception\nhandling.\n\nHaving looked over the code, it appears that the parameter may be handed down\nthrough up to twenty or so layers of functions. Consider a USB character\ndevice attached to a USB hub, attached to a USB controller that posts its\ninterrupts through a cascaded auxiliary interrupt controller. A character\ndevice driver may want to pass regs to the sysrq handler through the input\nlayer which adds another few layers of parameter passing.\n\nI\u0027ve build this code with allyesconfig for x86_64 and i386. I\u0027ve runtested the\nmain part of the code on FRV and i386, though I can\u0027t test most of the drivers.\nI\u0027ve also done partial conversion for powerpc and MIPS - these at least compile\nwith minimal configurations.\n\nThis will affect all archs. Mostly the changes should be relatively easy.\nTake do_IRQ(), store the regs pointer at the beginning, saving the old one:\n\n\tstruct pt_regs *old_regs \u003d set_irq_regs(regs);\n\nAnd put the old one back at the end:\n\n\tset_irq_regs(old_regs);\n\nDon\u0027t pass regs through to generic_handle_irq() or __do_IRQ().\n\nIn timer_interrupt(), this sort of change will be necessary:\n\n\t-\tupdate_process_times(user_mode(regs));\n\t-\tprofile_tick(CPU_PROFILING, regs);\n\t+\tupdate_process_times(user_mode(get_irq_regs()));\n\t+\tprofile_tick(CPU_PROFILING);\n\nI\u0027d like to move update_process_times()\u0027s use of get_irq_regs() into itself,\nexcept that i386, alone of the archs, uses something other than user_mode().\n\nSome notes on the interrupt handling in the drivers:\n\n (*) input_dev() is now gone entirely. The regs pointer is no longer stored in\n the input_dev struct.\n\n (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does\n something different depending on whether it\u0027s been supplied with a regs\n pointer or not.\n\n (*) Various IRQ handler function pointers have been moved to type\n irq_handler_t.\n\nSigned-Off-By: David Howells \u003cdhowells@redhat.com\u003e\n(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)\n" }, { "commit": "b68e31d0ebbcc909d1941f9f230c9d062a3a13d3", "tree": "b32902e5de02081cbb9eca49d7bb0b444e2b4f23", "parents": [ "ed97bd37efd8ff7398d3a7eedf4bcbf245f5dad3" ], "author": { "name": "Jeff Dike", "email": "jdike@addtoit.com", "time": "Mon Oct 02 02:17:18 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Oct 02 07:57:14 2006 -0700" }, "message": "[PATCH] const struct tty_operations\n\nAs part of an SMP cleanliness pass over UML, I consted a bunch of\nstructures in order to not have to document their locking. One of these\nstructures was a struct tty_operations. In order to const it in UML\nwithout introducing compiler complaints, the declaration of\ntty_set_operations needs to be changed, and then all of its callers need to\nbe fixed.\n\nThis patch declares all struct tty_operations in the tree as const. In all\ncases, they are static and used only as input to tty_set_operations. As an\nextra check, I ran an i386 allyesconfig build which produced no extra\nwarnings.\n\n53 drivers are affected. I checked the history of a bunch of them, and in\nmost cases, there have been only a handful of maintenance changes in the\nlast six months. serial_core.c was the busiest one that I looked at.\n\nSigned-off-by: Jeff Dike \u003cjdike@addtoit.com\u003e\nAcked-by: Alan Cox \u003calan@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "0f2ed4c6bae23d2b7ef0ea2d272377e3de700c0c", "tree": "94a24c9209eb97027e7035b2790a1592d4b2c40c", "parents": [ "69ab3912d1b4dbf27ea1a383cb5731251fc0e109" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Sat Jul 01 19:29:33 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sun Jul 02 13:58:49 2006 -0700" }, "message": "[PATCH] irq-flags: drivers/char: Use the new IRQF_ constants\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "602cada851b28c5792339786efe872fbdc1f5d41", "tree": "233d474b74d6038b5bb54a07ad91dd1bb10b0218", "parents": [ "82991c6f2c361acc17279b8124d9bf1878973435", "fee68d1cc0d9bd863e51c16cdcd707737b16bb38" ], "author": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Jun 29 14:19:21 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Thu Jun 29 14:19:21 2006 -0700" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/devfs-2.6\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/devfs-2.6: (22 commits)\n [PATCH] devfs: Remove it from the feature_removal.txt file\n [PATCH] devfs: Last little devfs cleanups throughout the kernel tree.\n [PATCH] devfs: Rename TTY_DRIVER_NO_DEVFS to TTY_DRIVER_DYNAMIC_DEV\n [PATCH] devfs: Remove the tty_driver devfs_name field as it\u0027s no longer needed\n [PATCH] devfs: Remove the line_driver devfs_name field as it\u0027s no longer needed\n [PATCH] devfs: Remove the videodevice devfs_name field as it\u0027s no longer needed\n [PATCH] devfs: Remove the gendisk devfs_name field as it\u0027s no longer needed\n [PATCH] devfs: Remove the miscdevice devfs_name field as it\u0027s no longer needed\n [PATCH] devfs: Remove the devfs_fs_kernel.h file from the tree\n [PATCH] devfs: Remove devfs_remove() function from the kernel tree\n [PATCH] devfs: Remove devfs_mk_cdev() function from the kernel tree\n [PATCH] devfs: Remove devfs_mk_bdev() function from the kernel tree\n [PATCH] devfs: Remove devfs_mk_symlink() function from the kernel tree\n [PATCH] devfs: Remove devfs_mk_dir() function from the kernel tree\n [PATCH] devfs: Remove devfs_*_tape() functions from the kernel tree\n [PATCH] devfs: Remove devfs support from the sound subsystem\n [PATCH] devfs: Remove devfs support from the ide subsystem.\n [PATCH] devfs: Remove devfs support from the serial subsystem\n [PATCH] devfs: Remove devfs from the init code\n [PATCH] devfs: Remove devfs from the partition code\n ...\n" }, { "commit": "8f7607803717e9d045965b210cd16a25d80cd04b", "tree": "1e8af970aa305be5e229a86b3ccc2525f3936d3b", "parents": [ "9a66a53f558efc2619a438278d2919b3c9a7f673" ], "author": { "name": "Jesper Juhl", "email": "jesper.juhl@gmail.com", "time": "Tue Jun 27 02:55:06 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Jun 27 17:32:48 2006 -0700" }, "message": "[PATCH] Remove redundant NULL checks before [kv]free - in drivers/\n\nRemove redundant NULL chck before kfree + tiny CodingStyle cleanup for\ndrivers/\n\nSigned-off-by: Jesper Juhl \u003cjesper.juhl@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "f4eaa37017a5a68f67ef86729508022c13fb8e6d", "tree": "7a2b03b575d77922c1e0bf1da7b74e87451462c6", "parents": [ "264f48646e6829b4d00a0e058452578318e6fb15" ], "author": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Mon Jun 20 21:15:16 2005 -0700" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Mon Jun 26 12:25:09 2006 -0700" }, "message": "[PATCH] devfs: Remove the tty_driver devfs_name field as it\u0027s no longer needed\n\nAlso fixes all drivers that set this field.\n\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n" }, { "commit": "706c8c93ba4865a19e981b9770151a7a63c15794", "tree": "63cbae3a74bfe40adcb1efa9ea5a6e7f6898b8ca", "parents": [ "8df83028cf52e3bf68dfd35a4b1a044b326a4a99" ], "author": { "name": "Segher Boessenkool", "email": "segher@kernel.crashing.org", "time": "Thu Mar 30 14:49:40 2006 +0200" }, "committer": { "name": "Paul Mackerras", "email": "paulus@samba.org", "time": "Sat Apr 01 22:36:57 2006 +1100" }, "message": "[PATCH] powerpc/pseries: Change H_StudlyCaps to H_SHOUTING_CAPS\n\nAlso cleans up some nearby whitespace problems.\n\nSigned-off-by: Segher Boessenkool \u003csegher@kernel.crashing.org\u003e\nSigned-off-by: Paul Mackerras \u003cpaulus@samba.org\u003e\n" }, { "commit": "b8c7b976a570aede21327e7d64781801e1641606", "tree": "e9c028187448dbe77bd36685a591b1f6d3c1274b", "parents": [ "c258dd40ab8851c41873516ef90125e3bcd2e3e1" ], "author": { "name": "Anton Blanchard", "email": "anton@samba.org", "time": "Sat Mar 25 17:31:30 2006 +1100" }, "committer": { "name": "Paul Mackerras", "email": "paulus@samba.org", "time": "Mon Mar 27 14:48:52 2006 +1100" }, "message": "[PATCH] powerpc: Compile warning in hvcs driver\n\nWe ended up with an unused variable after the tty updates went in. Fix it.\n\nSigned-off-by: Anton Blanchard \u003canton@samba.org\u003e\nSigned-off-by: Paul Mackerras \u003cpaulus@samba.org\u003e\n" }, { "commit": "2ef9481e666b4654159ac9f847e6963809e3c470", "tree": "62abb35633702dcc585df1e2ee093aaf0dc6bb07", "parents": [ "75288c78c69020a574d93770c3a941b785f3d93d" ], "author": { "name": "Jon Mason", "email": "jdmason@us.ibm.com", "time": "Mon Jan 23 10:58:20 2006 -0600" }, "committer": { "name": "Paul Mackerras", "email": "paulus@samba.org", "time": "Fri Feb 10 16:53:51 2006 +1100" }, "message": "[PATCH] powerpc: trivial: modify comments to refer to new location of files\n\nThis patch removes all self references and fixes references to files\nin the now defunct arch/ppc64 tree. I think this accomplises\neverything wanted, though there might be a few references I missed.\n\nSigned-off-by: Jon Mason \u003cjdmason@us.ibm.com\u003e\nSigned-off-by: Paul Mackerras \u003cpaulus@samba.org\u003e\n" }, { "commit": "33f0f88f1c51ae5c2d593d26960c760ea154c2e2", "tree": "f53a38cf49406863f079d74d0e8f91b276f7c1a9", "parents": [ "6ed80991a2dce4afc113be35089c564d62fa1f11" ], "author": { "name": "Alan Cox", "email": "alan@lxorguk.ukuu.org.uk", "time": "Mon Jan 09 20:54:13 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Tue Jan 10 08:01:59 2006 -0800" }, "message": "[PATCH] TTY layer buffering revamp\n\nThe API and code have been through various bits of initial review by\nserial driver people but they definitely need to live somewhere for a\nwhile so the unconverted drivers can get knocked into shape, existing\ndrivers that have been updated can be better tuned and bugs whacked out.\n\nThis replaces the tty flip buffers with kmalloc objects in rings. In the\nnormal situation for an IRQ driven serial port at typical speeds the\nbehaviour is pretty much the same, two buffers end up allocated and the\nkernel cycles between them as before.\n\nWhen there are delays or at high speed we now behave far better as the\nbuffer pool can grow a bit rather than lose characters. This also means\nthat we can operate at higher speeds reliably.\n\nFor drivers that receive characters in blocks (DMA based, USB and\nespecially virtualisation) the layer allows a lot of driver specific\ncode that works around the tty layer with private secondary queues to be\nremoved. The IBM folks need this sort of layer, the smart serial port\npeople do, the virtualisers do (because a virtualised tty typically\noperates at infinite speed rather than emulating 9600 baud).\n\nFinally many drivers had invalid and unsafe attempts to avoid buffer\noverflows by directly invoking tty methods extracted out of the innards\nof work queue structs. These are no longer needed and all go away. That\nfixes various random hangs with serial ports on overflow.\n\nThe other change in here is to optimise the receive_room path that is\nused by some callers. It turns out that only one ldisc uses receive room\nexcept asa constant and it updates it far far less than the value is\nread. We thus make it a variable not a function call.\n\nI expect the code to contain bugs due to the size alone but I\u0027ll be\nwatching and squashing them and feeding out new patches as it goes.\n\nBecause the buffers now dynamically expand you should only run out of\nbuffering when the kernel runs out of memory for real. That means a lot of\nthe horrible hacks high performance drivers used to do just aren\u0027t needed any\nmore.\n\nDescription:\n\ntty_insert_flip_char is an old API and continues to work as before, as does\ntty_flip_buffer_push() [this is why many drivers dont need modification]. It\ndoes now also return the number of chars inserted\n\nThere are also\n\ntty_buffer_request_room(tty, len)\n\nwhich asks for a buffer block of the length requested and returns the space\nfound. This improves efficiency with hardware that knows how much to\ntransfer.\n\nand tty_insert_flip_string_flags(tty, str, flags, len)\n\nto insert a string of characters and flags\n\nFor a smart interface the usual code is\n\n len \u003d tty_request_buffer_room(tty, amount_hardware_says);\n tty_insert_flip_string(tty, buffer_from_card, len);\n\nMore description!\n\nAt the moment tty buffers are attached directly to the tty. This is causing a\nlot of the problems related to tty layer locking, also problems at high speed\nand also with bursty data (such as occurs in virtualised environments)\n\nI\u0027m working on ripping out the flip buffers and replacing them with a pool of\ndynamically allocated buffers. This allows both for old style \"byte I/O\"\ndevices and also helps virtualisation and smart devices where large blocks of\ndata suddenely materialise and need storing.\n\nSo far so good. Lots of drivers reference tty-\u003eflip.*. Several of them also\ncall directly and unsafely into function pointers it provides. This will all\nbreak. Most drivers can use tty_insert_flip_char which can be kept as an API\nbut others need more.\n\nAt the moment I\u0027ve added the following interfaces, if people think more will\nbe needed now is a good time to say\n\n int tty_buffer_request_room(tty, size)\n\nTry and ensure at least size bytes are available, returns actual room (may be\nzero). At the moment it just uses the flipbuf space but that will change.\nRepeated calls without characters being added are not cumulative. (ie if you\ncall it with 1, 1, 1, and then 4 you\u0027ll have four characters of space. The\nother functions will also try and grow buffers in future but this will be a\nmore efficient way when you know block sizes.\n\n int tty_insert_flip_char(tty, ch, flag)\n\nAs before insert a character if there is room. Now returns 1 for success, 0\nfor failure.\n\n int tty_insert_flip_string(tty, str, len)\n\nInsert a block of non error characters. Returns the number inserted.\n\n int tty_prepare_flip_string(tty, strptr, len)\n\nAdjust the buffer to allow len characters to be added. Returns a buffer\npointer in strptr and the length available. This allows for hardware that\nneeds to use functions like insl or mencpy_fromio.\n\nSigned-off-by: Alan Cox \u003calan@redhat.com\u003e\nCc: Paul Fulghum \u003cpaulkf@microgate.com\u003e\nSigned-off-by: Hirokazu Takata \u003ctakata@linux-m32r.org\u003e\nSigned-off-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nSigned-off-by: Jeff Dike \u003cjdike@addtoit.com\u003e\nSigned-off-by: John Hawkes \u003chawkes@sgi.com\u003e\nSigned-off-by: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nSigned-off-by: Adrian Bunk \u003cbunk@stusta.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "915124d8114ec8c3825b10a39151bf9e851593bb", "tree": "854dd90a4ec252c6282abb2570424c7d17656114", "parents": [ "7c7eb28481a038c3859a0efcf38ac5b642aca212" ], "author": { "name": "Stephen Rothwell", "email": "sfr@canb.auug.org.au", "time": "Mon Oct 24 15:12:22 2005 +1000" }, "committer": { "name": "Stephen Rothwell", "email": "sfr@canb.auug.org.au", "time": "Mon Oct 24 16:59:13 2005 +1000" }, "message": "powerpc: set the driver.owner field for all vio drivers\n\nSigned-off-by: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\n" }, { "commit": "6fdf5392caa4c3cba65add0a4beec9f5eb96b723", "tree": "336ba343889a1d720e09477c2ea88cd5f99a67b9", "parents": [ "f38d87f566195d78bd70538d5c774758f2d926d3" ], "author": { "name": "Stephen Rothwell", "email": "sfr@canb.auug.org.au", "time": "Mon Oct 24 14:53:21 2005 +1000" }, "committer": { "name": "Stephen Rothwell", "email": "sfr@canb.auug.org.au", "time": "Mon Oct 24 15:42:12 2005 +1000" }, "message": "powerpc: don\u0027t duplicate name between vio_driver and device_driver\n\nJust set the name field directly in the device_driver structure\ncontained in the vio_driver struct.\n\nSigned-off-by: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\n" }, { "commit": "fb120da678c517f72d4b39932062c2191827b331", "tree": "0ae6b9d42e0c66293c3cc567f2f8279ca2e89cde", "parents": [ "71d276d751ff5ddba28312aecefb174b20a5b970" ], "author": { "name": "Stephen Rothwell", "email": "sfr@canb.auug.org.au", "time": "Wed Aug 17 16:42:59 2005 +1000" }, "committer": { "name": "Paul Mackerras", "email": "paulus@samba.org", "time": "Tue Aug 30 13:31:56 2005 +1000" }, "message": "[PATCH] Make MODULE_DEVICE_TABLE work for vio devices\n\nMake MODULE_DEVICE_TABLE work for vio devices.\n\nSigned-off-by: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\nSigned-off-by: Paul Mackerras \u003cpaulus@samba.org\u003e\n" }, { "commit": "74880c063b06efd103c924abfe19d9d8fa4864c4", "tree": "7d0995426cec1f3577a5f8e5f61ada43a0df9813", "parents": [ "ff381d2223a30ee70752791fd9c3588d8f1cab77" ], "author": { "name": "Yani Ioannou", "email": "yani.ioannou@gmail.com", "time": "Tue May 17 06:41:12 2005 -0400" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Mon Jun 20 15:15:32 2005 -0700" }, "message": "[PATCH] Driver Core: drivers/base - drivers/i2c/chips/adm1026.c: update device attribute callbacks\n\nSigned-off-by: Yani Ioannou \u003cyani.ioannou@gmail.com\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n" }, { "commit": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "tree": "0bba044c4ce775e45a88a51686b5d9f90697ea9d", "parents": [], "author": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Apr 16 15:20:36 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Apr 16 15:20:36 2005 -0700" }, "message": "Linux-2.6.12-rc2\n\nInitial git repository build. I\u0027m not bothering with the full history,\neven though we have it. We can create a separate \"historical\" git\narchive of that later if we want to, and in the meantime it\u0027s about\n3.2GB when imported into git - space that would just make the early\ngit days unnecessarily complicated, when we don\u0027t have a lot of good\ninfrastructure for it.\n\nLet it rip!\n" } ] }