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* add touch_all_softlockup_watchdogs()Jeremy Fitzhardinge2007-05-08
| | | | | | | | | | | | | | | | | | | | Add touch_all_softlockup_watchdogs() to allow the softlockup watchdog timers on all cpus to be updated. This is used to prevent sysrq-t from generating a spurious watchdog message when generating lots of output. Softlockup watchdogs use sched_clock() as its timebase, which is inherently per-cpu (at least, when it is measuring unstolen time). Because of this, it isn't possible for one CPU to directly update the other CPU's timers, but it is possible to tell the other CPUs to do update themselves appropriately. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Acked-by: Chris Lalancette <clalance@redhat.com> Signed-off-by: Prarit Bhargava <prarit@redhat.com> Cc: Rick Lindsley <ricklind@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Ignore stolen time in the softlockup watchdogJeremy Fitzhardinge2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The softlockup watchdog is currently a nuisance in a virtual machine, since the whole system could have the CPU stolen from it for a long period of time. While it would be unlikely for a guest domain to be denied timer interrupts for over 10s, it could happen and any softlockup message would be completely spurious. Earlier I proposed that sched_clock() return time in unstolen nanoseconds, which is how Xen and VMI currently implement it. If the softlockup watchdog uses sched_clock() to measure time, it would automatically ignore stolen time, and therefore only report when the guest itself locked up. When running native, sched_clock() returns real-time nanoseconds, so the behaviour would be unchanged. Note that sched_clock() used this way is inherently per-cpu, so this patch makes sure that the per-processor watchdog thread initialized its own timestamp. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Cc: Zachary Amsden <zach@vmware.com> Cc: James Morris <jmorris@namei.org> Cc: Dan Hecht <dhecht@vmware.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Chris Lalancette <clalance@redhat.com> Cc: Rick Lindsley <ricklind@us.ibm.com> Cc: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Move timekeeping code to timekeeping.cjohn stultz2007-05-08
| | | | | | | | | | | | Move the timekeeping code out of kernel/timer.c and into kernel/time/timekeeping.c. I made no cleanups or other changes in transit. [akpm@linux-foundation.org: build fix] Signed-off-by: John Stultz <johnstul@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* time: SMP friendly alignment of struct clocksourceEric Dumazet2007-05-08
| | | | | | | | | | | | | | | | struct clocksource is a critical data structure. Most of its fields are read only, some of them are heavily modified at each timer interrupt. It makes sense to separate those fields and make sure they all share one cache line, or at least the minimum for machines with small cache lines. [akpm@linux-foundation.org: build fix] Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Acked-by: John Stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* IRQ: check for PERCPU flag only when adding first irqactionAhmed S. Darwish2007-05-08
| | | | | | | | | | | | | An irqaction structure won't be added to an IRQ descriptor irqaction list if it doesn't agree with other irqactions on the IRQF_PERCPU flag. Don't check for this flag to change IRQ descriptor `status' for every irqaction added to the list, Doing the check only for the first irqaction added is enough. Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* <linux/sysdev.h> needs to include <linux/module.h>Ralf Baechle2007-05-08
| | | | | | | | | | | sysdev.h uses THIS_MODULE so should include <linux/module.h>. [akpm@linux-foundation.org: couple of fixes] Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Cc: Andi Kleen <ak@suse.de> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add a new deferrable delayed work initVenki Pallipadi2007-05-08
| | | | | | | | | | | | | | Add a new deferrable delayed work init. This can be used to schedule work that are 'unimportant' when CPU is idle and can be called later, when CPU eventually comes out of idle. Use this init in cpufreq ondemand governor. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Dave Jones <davej@codemonkey.org.uk> Cc: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add support for deferrable timersVenki Pallipadi2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce a new flag for timers - deferrable: Timers that work normally when system is busy. But, will not cause CPU to come out of idle (just to service this timer), when CPU is idle. Instead, this timer will be serviced when CPU eventually wakes up with a subsequent non-deferrable timer. The main advantage of this is to avoid unnecessary timer interrupts when CPU is idle. If the routine currently called by a timer can wait until next event without any issues, this new timer can be used to setup timer event for that routine. This, with dynticks, allows CPUs to be lazy, allowing them to stay in idle for extended period of time by reducing unnecesary wakeup and thereby reducing the power consumption. This patch: Builds this new timer on top of existing timer infrastructure. It uses last bit in 'base' pointer of timer_list structure to store this deferrable timer flag. __next_timer_interrupt() function skips over these deferrable timers when CPU looks for next timer event for which it has to wake up. This is exported by a new interface init_timer_deferrable() that can be called in place of regular init_timer(). [akpm@linux-foundation.org: Privatise a #define] Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* layered parport code uses parport->devDavid Brownell2007-05-08
| | | | | | | | | | | | | | | | | | | Update some of the layered parport_driver code to use parport->dev: - i2c-parport (parent of i2c_adapter) - spi_butterfly (parent of spi_master, allowing cruft removal) - lp (creating class_device) - ppdev (parent of parportN device) - tipar (creating class_device) There are still drivers that should be updated, like some of the input drivers; but they won't be any worse off than they are today. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Greg KH <greg@kroah.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* legacy PC parports support parport->devJean Delvare2007-05-08
| | | | | | | | | | | | | | | Give legacy parallel ports a platform device in the device tree. This is a quick and dirty implementation; it doesn't actually convert the legacy parport code to the device driver model (by splitting out probing from device creation). But at least parallel port device drivers will finally have a device to work with. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* parport->dev driver model supportDavid Brownell2007-05-08
| | | | | | | | | | | | | | | | | Currently a parport_driver can't get a handle on the device node for the underlying parport (PNPACPI, PCI, etc). That prevents correct placement of sysfs child nodes, which can affect things like power management. This patch adds a field to "struct parport" pointing to that device node, and updates non-legacy port drivers to initialize that device pointer. That field replaces the analagous PCI-only support in parport_pc. [akpm@linux-foundation.org: fix powerpc build] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/irq/proc.c: unprotected iteration over the IRQ action list in ↵Dmitry Adamushko2007-05-08
| | | | | | | | | | | | | | | name_unique() setup_irq() releases a desc->lock before calling register_handler_proc(), so the iteration over the IRQ action list is not protected. (akpm: the check itself is still racy, but at least it probably won't oops now). Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Delete unused header file linux/awe_voice.hRobert P. J. Day2007-05-08
| | | | | | | | | Delete the unused header file include/linux/awe_voice.h, as well as its corresponding Kbuild entry. Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Fix race between attach_task and cpuset_exitSrivatsa Vaddagiri2007-05-08
| | | | | | | | | | | | | | | | Currently cpuset_exit() changes the exiting task's ->cpuset pointer w/o taking task_lock(). This can lead to ugly races between attach_task and cpuset_exit. Details of the races are described at http://lkml.org/lkml/2007/3/24/132. Patch below closes those races. Signed-off-by: Srivatsa Vaddagiri <vatsa@in.ibm.com> Cc: Paul Jackson <pj@sgi.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* make remove_inode_dquot_ref() staticAdrian Bunk2007-05-08
| | | | | | | | | remove_inode_dquot_ref() can now become static. Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fix sscanf %n match at end of input stringJohannes Berg2007-05-08
| | | | | | | | | | | | | | | | | | I was playing with some code that sometimes got a string where a %n match should have been done where the input string ended, for example like this: sscanf("abc123", "abc%d%n", &a, &n); /* doesn't work */ sscanf("abc123a", "abc%d%n", &a, &n); /* works */ However, the scanf function in the kernel doesn't convert the %n in that case because it has already matched the complete input after %d and just completely stops matching then. This patch fixes that. [akpm@linux-foundation.org: cleanups] Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Delete unused header file math-emu/extended.hRobert P. J. Day2007-05-08
| | | | | | Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* schedule obsolete OSS drivers for removal, 4th roundAdrian Bunk2007-05-08
| | | | | | | | Schedule obsolete OSS drivers for removal. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Protect tty drivers list with tty_mutexAlexey Dobriyan2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Additions and removal from tty_drivers list were just done as well as iterating on it for /proc/tty/drivers generation. testing: modprobe/rmmod loop of simple module which does nothing but tty_register_driver() vs cat /proc/tty/drivers loop BUG: unable to handle kernel paging request at virtual address 6b6b6b6b printing eip: c01cefa7 *pde = 00000000 Oops: 0000 [#1] PREEMPT last sysfs file: devices/pci0000:00/0000:00:1d.7/usb5/5-0:1.0/bInterfaceProtocol Modules linked in: ohci_hcd af_packet e1000 ehci_hcd uhci_hcd usbcore xfs CPU: 0 EIP: 0060:[<c01cefa7>] Not tainted VLI EFLAGS: 00010297 (2.6.21-rc4-mm1 #4) EIP is at vsnprintf+0x3a4/0x5fc eax: 6b6b6b6b ebx: f6cb50f2 ecx: 6b6b6b6b edx: fffffffe esi: c0354700 edi: f6cb6000 ebp: 6b6b6b6b esp: f31f5e68 ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068 Process cat (pid: 31864, ti=f31f4000 task=c1998030 task.ti=f31f4000) Stack: 00000000 c0103f20 c013003a c0103f20 00000000 f6cb50da 0000000a 00000f0e f6cb50f2 00000010 00000014 ffffffff ffffffff 00000007 c0354753 f6cb50f2 f73e39dc f73e39dc 00000001 c0175416 f31f5ed8 f31f5ed4 0ee00000 f32090bc Call Trace: [<c0103f20>] restore_nocheck+0x12/0x15 [<c013003a>] mark_held_locks+0x6d/0x86 [<c0103f20>] restore_nocheck+0x12/0x15 [<c0175416>] seq_printf+0x2e/0x52 [<c0192895>] show_tty_range+0x35/0x1f3 [<c0175416>] seq_printf+0x2e/0x52 [<c0192add>] show_tty_driver+0x8a/0x1d9 [<c01758f6>] seq_read+0x70/0x2ba [<c0175886>] seq_read+0x0/0x2ba [<c018d8e6>] proc_reg_read+0x63/0x9f [<c015e764>] vfs_read+0x7d/0xb5 [<c018d883>] proc_reg_read+0x0/0x9f [<c015eab1>] sys_read+0x41/0x6a [<c0103e4e>] sysenter_past_esp+0x5f/0x99 ======================= Code: 00 8b 4d 04 e9 44 ff ff ff 8d 4d 04 89 4c 24 50 8b 6d 00 81 fd ff 0f 00 00 b8 a4 c1 35 c0 0f 46 e8 8b 54 24 2c 89 e9 89 c8 eb 06 <80> 38 00 74 07 40 4a 83 fa ff 75 f4 29 c8 89 c6 8b 44 24 28 89 EIP: [<c01cefa7>] vsnprintf+0x3a4/0x5fc SS:ESP 0068:f31f5e68 Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Remove do_sync_file_range()Mark Fasheh2007-05-08
| | | | | | | | | | Remove do_sync_file_range() and convert callers to just use do_sync_mapping_range(). Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Char: cs5535_gpio, add MODULE_DEVICE_TABLEJiri Slaby2007-05-08
| | | | | | | | | | cs5535_gpio, add MODULE_DEVICE_TABLE Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Ben Gardner <bgardner@wabtec.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Char: rocket, add MODULE_DEVICE_TABLEJiri Slaby2007-05-08
| | | | | | | | rocket, add MODULE_DEVICE_TABLE Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* move die notifier handling to common codeChristoph Hellwig2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | This patch moves the die notifier handling to common code. Previous various architectures had exactly the same code for it. Note that the new code is compiled unconditionally, this should be understood as an appel to the other architecture maintainer to implement support for it aswell (aka sprinkling a notify_die or two in the proper place) arm had a notifiy_die that did something totally different, I renamed it to arm_notify_die as part of the patch and made it static to the file it's declared and used at. avr32 used to pass slightly less information through this interface and I brought it into line with the other architectures. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix vmalloc_sync_all bustage] [bryan.wu@analog.com: fix vmalloc_sync_all in nommu] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: <linux-arch@vger.kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kprobes: fix sparse NULL warningRandy Dunlap2007-05-08
| | | | | | | | | | Fix sparse NULL warnings: kernel/kprobes.c:915:49: warning: Using plain integer as NULL pointer Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* reiserfs: proc support requires PROC_FSRandy Dunlap2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | REISER_FS /proc option needs to depend on PROC_FS. fs/reiserfs/procfs.c: In function 'show_super': fs/reiserfs/procfs.c:134: error: 'reiserfs_proc_info_data_t' has no member named 'max_hash_collisions' fs/reiserfs/procfs.c:134: error: 'reiserfs_proc_info_data_t' has no member named 'breads' fs/reiserfs/procfs.c:135: error: 'reiserfs_proc_info_data_t' has no member named 'bread_miss' fs/reiserfs/procfs.c:135: error: 'reiserfs_proc_info_data_t' has no member named 'search_by_key' fs/reiserfs/procfs.c:136: error: 'reiserfs_proc_info_data_t' has no member named 'search_by_key_fs_changed' fs/reiserfs/procfs.c:136: error: 'reiserfs_proc_info_data_t' has no member named 'search_by_key_restarted' fs/reiserfs/procfs.c:137: error: 'reiserfs_proc_info_data_t' has no member named 'insert_item_restarted' fs/reiserfs/procfs.c:137: error: 'reiserfs_proc_info_data_t' has no member named 'paste_into_item_restarted' fs/reiserfs/procfs.c:138: error: 'reiserfs_proc_info_data_t' has no member named 'cut_from_item_restarted' fs/reiserfs/procfs.c:139: error: 'reiserfs_proc_info_data_t' has no member named 'delete_solid_item_restarted' fs/reiserfs/procfs.c:139: error: 'reiserfs_proc_info_data_t' has no member named 'delete_item_restarted' fs/reiserfs/procfs.c:140: error: 'reiserfs_proc_info_data_t' has no member named 'leaked_oid' fs/reiserfs/procfs.c:140: error: 'reiserfs_proc_info_data_t' has no member named 'leaves_removable' fs/reiserfs/procfs.c: In function 'show_per_level': fs/reiserfs/procfs.c:184: error: 'reiserfs_proc_info_data_t' has no member named 'balance_at' fs/reiserfs/procfs.c:185: error: 'reiserfs_proc_info_data_t' has no member named 'sbk_read_at' fs/reiserfs/procfs.c:186: error: 'reiserfs_proc_info_data_t' has no member named 'sbk_fs_changed' fs/reiserfs/procfs.c:187: error: 'reiserfs_proc_info_data_t' has no member named 'sbk_restarted' fs/reiserfs/procfs.c:188: error: 'reiserfs_proc_info_data_t' has no member named 'free_at' fs/reiserfs/procfs.c:189: error: 'reiserfs_proc_info_data_t' has no member named 'items_at' fs/reiserfs/procfs.c:190: error: 'reiserfs_proc_info_data_t' has no member named 'can_node_be_removed' fs/reiserfs/procfs.c:191: error: 'reiserfs_proc_info_data_t' has no member named 'lnum' fs/reiserfs/procfs.c:192: error: 'reiserfs_proc_info_data_t' has no member named 'rnum' fs/reiserfs/procfs.c:193: error: 'reiserfs_proc_info_data_t' has no member named 'lbytes' fs/reiserfs/procfs.c:194: error: 'reiserfs_proc_info_data_t' has no member named 'rbytes' fs/reiserfs/procfs.c:195: error: 'reiserfs_proc_info_data_t' has no member named 'get_neighbors' fs/reiserfs/procfs.c:196: error: 'reiserfs_proc_info_data_t' has no member named 'get_neighbors_restart' fs/reiserfs/procfs.c:197: error: 'reiserfs_proc_info_data_t' has no member named 'need_l_neighbor' fs/reiserfs/procfs.c:197: error: 'reiserfs_proc_info_data_t' has no member named 'need_r_neighbor' fs/reiserfs/procfs.c: In function 'show_bitmap': fs/reiserfs/procfs.c:224: error: 'reiserfs_proc_info_data_t' has no member named 'free_block' fs/reiserfs/procfs.c:225: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap' fs/reiserfs/procfs.c:226: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap' fs/reiserfs/procfs.c:227: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap' fs/reiserfs/procfs.c:228: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap' fs/reiserfs/procfs.c:229: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap' fs/reiserfs/procfs.c:230: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap' fs/reiserfs/procfs.c:230: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap' fs/reiserfs/procfs.c: In function 'show_journal': fs/reiserfs/procfs.c:384: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c:385: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c:386: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c:387: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c:388: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c:389: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c:390: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c:391: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c:392: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c:393: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c:394: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c:395: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c:395: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c:395: error: 'reiserfs_proc_info_data_t' has no member named 'journal' fs/reiserfs/procfs.c: In function 'reiserfs_proc_info_init': fs/reiserfs/procfs.c:504: warning: implicit declaration of function '__PINFO' fs/reiserfs/procfs.c:504: error: request for member 'lock' in something not a structure or union fs/reiserfs/procfs.c: In function 'reiserfs_proc_info_done': fs/reiserfs/procfs.c:544: error: request for member 'lock' in something not a structure or union fs/reiserfs/procfs.c:545: error: request for member 'exiting' in something not a structure or union fs/reiserfs/procfs.c:546: error: request for member 'lock' in something not a structure or union Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: introduce no_tty and use it in selinuxEric W. Biederman2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | While researching the tty layer pid leaks I found a weird case in selinux when we drop a controlling tty because of inadequate permissions we don't do the normal hangup processing. Which is a problem if it happens the session leader has exec'd something that can no longer access the tty. We already have code in the kernel to handle this case in the form of the TIOCNOTTY ioctl. So this patch factors out a helper function that is the essence of that ioctl and calls it from the selinux code. This removes the inconsistency in handling dropping of a controlling tty and who knows it might even make some part of user space happy because it received a SIGHUP it was expecting. In addition since this removes the last user of proc_set_tty outside of tty_io.c proc_set_tty is made static and removed from tty.h Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: James Morris <jmorris@namei.org> Cc: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: simplify calling of put_pid.Eric W. Biederman2007-05-08
| | | | | | | | | | | | | | | | This patch should contain no functional changes. At some point I got confused and thought put_pid could not be called while a spin lock was held. While it may be nice to avoid that to reduce lock hold times put_pid can be safely called while we hold a spin lock. This patch removes all of the complications from the code introduced by my misunderstanding, making the code a little more readable. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: remove unnecessary export of proc_clear_ttyEric W. Biederman2007-05-08
| | | | | | | | | | All of the users of proc_clear_tty are compiled into the kernel so exporting this symbol appears gratuitous. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Fixes and cleanups for earlyprintk aka boot consoleGerd Hoffmann2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The console subsystem already has an idea of a boot console, using the CON_BOOT flag. The implementation has some flaws though. The major problem is that presence of a boot console makes register_console() ignore any other console devices (unless explicitly specified on the kernel command line). This patch fixes the console selection code to *not* consider a boot console a full-featured one, so the first non-boot console registering will become the default console instead. This way the unregister call for the boot console in the register_console() function actually triggers and the handover from the boot console to the real console device works smoothly. Added a printk for the handover, so you know which console device the output goes to when the boot console stops printing messages. The disable_early_printk() call is obsolete with that patch, explicitly disabling the early console isn't needed any more as it works automagically with that patch. I've walked through the tree, dropped all disable_early_printk() instances found below arch/ and tagged the consoles with CON_BOOT if needed. The code is tested on x86, sh (thanks to Paul) and mips (thanks to Ralf). Changes to last version: Rediffed against -rc3, adapted to mips cleanups by Ralf, fixed "udbg-immortal" cmd line arg on powerpc. Signed-off-by: Gerd Hoffmann <kraxel@exsuse.de> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Cc: Andi Kleen <ak@suse.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* enlarge console.nameAndrew Morton2007-05-08
| | | | | | | | | | | | console.name[] is eight chars, but so is "earlyvga". So when we try to print console->name when using earlyvga it runs off the end of the string. Make it bigger. Diagnosed-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* /proc/*/oom_score oops re badnessAlexey Dobriyan2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Eternal quest to make while true; do cat /proc/fs/xfs/stat >/dev/null 2>/dev/null; done while true; do find /proc -type f 2>/dev/null | xargs cat >/dev/null 2>/dev/null; done while true; do modprobe xfs; rmmod xfs; done work reliably continues and now kernel oopses in the following way: BUG: unable to handle ... at virtual address 6b6b6b6b EIP is at badness process: cat proc_oom_score proc_info_read sys_fstat64 vfs_read proc_info_read sys_read Failing code is prefetch hidden in list_for_each_entry() in badness(). badness() is reachable from two points. One is proc_oom_score, another is out_of_memory() => select_bad_process() => badness(). Second path grabs tasklist_lock, while first doesn't. Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* futex: restartable futex_waitNick Piggin2007-05-08
| | | | | | | | | | | | | | | | | | | LTP test sigaction_16_24 fails, because it expects sem_wait to be restarted if SA_RESTART is set. sem_wait is implemented with futex_wait, that currently doesn't support being restarted. Ulrich confirms that the call should be restartable. Implement a restart_block method to handle the relative timeout, and allow restarts. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Ulrich Drepper <drepper@redhat.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Roland McGrath <roland@redhat.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* futex: get_futex_key, get_key_refs and drop_key_refsRusty Russell2007-05-08
| | | | | | | | | | | | | | lguest uses the convenient futex infrastructure for inter-domain I/O, so expose get_futex_key, get_key_refs (renamed get_futex_key_refs) and drop_key_refs (renamed drop_futex_key_refs). Also means we need to expose the union that these use. No code changes. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: add RTC class driver for the Maxim MAX6900Dale Farnsworth2007-05-08
| | | | | | | | | Signed-off-by: Dale Farnsworth.org <dale@farnsworth.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* RTC: add rtc-rs5c313 driverNobuhiro Iwamatsu2007-05-08
| | | | | | | | | | | | Add an RTC driver for Ricoh RS5C313 RTC chip. [akpm@linux-foundation.org: Zillions of coding-style fixes] [akpm@linux-foundation.org: build fixes] Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* as: fix antic_expire checkNick Piggin2007-05-08
| | | | | | | | | | Fix units mismatch (jiffies vs msecs) in as-iosched.c, spotted by Xiaoning Ding <dingxn@cse.ohio-state.edu>. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Subject: jsm driver fix for linuxpps supportLen Sorensen2007-05-08
| | | | | | | | | | | | | | | | | | The jsm driver doesn't currently use the uart_handle_*_change helper functions, which are the obvious place for things like linuxpps to tie into (which it now does of course), and as a result the jsm driver can not be used with linuxpps and anything else that ties into the serial_core helper functions. This patch adds calls to these helper functions whenever the value they manage changes. That actual storage of the state is not modified since the jsm driver caches the current settings (The 8250 driver reads them everytime a user asks for the state), and only updates them whenever they change. Signed-off-by: Len Sorensen <lsorense@csclub.uwaterloo.ca> Cc: Scott H Kilau <Scott_Kilau@digi.com> Cc: Wendy Xiong <wendyx@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Small fixes for jsm driverLen Sorensen2007-05-08
| | | | | | | | | | | | | | The jsm driver fails when you try to use the TIOCSSERIAL ioctl. The reason is that the driver never sets uart_port.uartclk, causing the data received using TIOCGSERIAL to not match the internal state of the driver. This patch fixes this problem by settings the uartclk to the value used by the serial_core (16 times the baud base). Signed-off-by: Len Sorensen <lsorense@csclub.uwaterloo.ca> Cc: Scott H Kilau <Scott_Kilau@digi.com> Cc: Wendy Xiong <wendyx@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cyclades: remove custom typesKlaus Kudielka2007-05-08
| | | | | | | Switch from private uclong, etc over to standard types. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fix cyclades.h for x86_64 (and probably others)Klaus Kudielka2007-05-08
| | | | | | | | | | | | | | | | At least on x86_64 the present cyclades.h is broken due to the wrong size of uclong. This affects, of course, both the kernel and the user-level utilities. The symptom is that cyzload refuses to load the firmware. I also managed to freeze the machine when unloading the module. The patch below fixes this in an architecture-independent way. I have tested it with 2.6.19 and the driver works fine again with a Cyclades-Z on an Athlon 64 X2. [akpm@linux-foundation.org: fix warnings] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Kprobes: Make kprobe.symbol_name constAnanth N Mavinakayanahalli2007-05-08
| | | | | | | | | | | | | | | Kprobes doesn't scribble the kprobe.symbol_name field. Its only set by the module when registering the probe. Modules that exercise good hygiene using the "const" qualifier will see warnings... warning: assignment discards qualifiers from pointer target type Make struct kprobe.symbol_name const char * Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Jim Keniston <jkenisto@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: i386/x86_64 arbitary speed supportAlan Cox2007-05-08
| | | | | | | | | | Adds the needed TCGETS2/TCSETS2 ioctl calls, structures, defines and the like. Tested against the test suite and passes. Other platforms should need roughly the same change. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* VFS: delay the dentry name generation on sockets and pipesEric Dumazet2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1) Introduces a new method in 'struct dentry_operations'. This method called d_dname() might be called from d_path() to build a pathname for special filesystems. It is called without locks. Future patches (if we succeed in having one common dentry for all pipes/sockets) may need to change prototype of this method, but we now use : char *d_dname(struct dentry *dentry, char *buffer, int buflen); 2) Adds a dynamic_dname() helper function that eases d_dname() implementations 3) Defines d_dname method for sockets : No more sprintf() at socket creation. This is delayed up to the moment someone does an access to /proc/pid/fd/... 4) Defines d_dname method for pipes : No more sprintf() at pipe creation. This is delayed up to the moment someone does an access to /proc/pid/fd/... A benchmark consisting of 1.000.000 calls to pipe()/close()/close() gives a *nice* speedup on my Pentium(M) 1.6 Ghz : 3.090 s instead of 3.450 s Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Acked-by: Christoph Hellwig <hch@infradead.org> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* add file position info to procMiklos Szeredi2007-05-08
| | | | | | | | | | | | | | | | | | | | | | Add support for finding out the current file position, open flags and possibly other info in the future. These new entries are added: /proc/PID/fdinfo/FD /proc/PID/task/TID/fdinfo/FD For each fd the information is provided in the following format: pos: 1234 flags: 0100002 [bunk@stusta.de: make struct proc_fdinfo_file_operations static] Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Cc: Alexey Dobriyan <adobriyan@sw.ru> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* procfs: reorder struct pid_dentry to save space on 64bit archs, and constify ↵Eric Dumazet2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | them Change the order of fields of struct pid_entry (file fs/proc/base.c) in order to avoid a hole on 64bit archs. (8 bytes saved per object) Also change all pid_entry arrays to be const qualified, to make clear they must not be modified. Before (on x86_64) : # size fs/proc/base.o text data bss dec hex filename 15549 2192 0 17741 454d fs/proc/base.o After : # size fs/proc/base.o text data bss dec hex filename 17229 176 0 17405 43fd fs/proc/base.o Thats 336 bytes saved on kernel size on x86_64 Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/char/synclink.c: check kmalloc() return valueAmit Choudhary2007-05-08
| | | | | | | Signed-off-by: Amit Choudhary <amit2030@gmail.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* remove unused header file: drivers/char/digi.hRobert P. J. Day2007-05-08
| | | | | | Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* remove unused header file: drivers/message/i2o/i2o_lan.hRobert P. J. Day2007-05-08
| | | | | | | Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Cc: Markus Lidel <Markus.Lidel@shadowconnect.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* proc: maps protectionKees Cook2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | The /proc/pid/ "maps", "smaps", and "numa_maps" files contain sensitive information about the memory location and usage of processes. Issues: - maps should not be world-readable, especially if programs expect any kind of ASLR protection from local attackers. - maps cannot just be 0400 because "-D_FORTIFY_SOURCE=2 -O2" makes glibc check the maps when %n is in a *printf call, and a setuid(getuid()) process wouldn't be able to read its own maps file. (For reference see http://lkml.org/lkml/2006/1/22/150) - a system-wide toggle is needed to allow prior behavior in the case of non-root applications that depend on access to the maps contents. This change implements a check using "ptrace_may_attach" before allowing access to read the maps contents. To control this protection, the new knob /proc/sys/kernel/maps_protect has been added, with corresponding updates to the procfs documentation. [akpm@linux-foundation.org: build fixes] [akpm@linux-foundation.org: New sysctl numbers are old hat] Signed-off-by: Kees Cook <kees@outflux.net> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* virtual_eisa_root_init() should be __initAndrew Morton2007-05-08
| | | | | | | | | | WARNING: vmlinux - Section mismatch: reference to .init.text:eisa_root_register from .text between 'virtual_eisa_root_init' (at offset 0xc026b80f) and 'cpufreq_debug_disable_ratelimit' Cc: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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