- 08 May, 2007 40 commits
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Philippe De Muyter authored
Add support for the Motorola sysv68 disk partition (slices in motorola doc). Signed-off-by:
Philippe De Muyter <phdm@macqel.be> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Ravikiran G Thirumalai authored
We noticed a drop in n/w performance due to the irq_desc being cacheline aligned rather than internode aligned. We see 50% of expected performance when two e1000 nics local to two different nodes have consecutive irq descriptors allocated, due to false sharing. Note that this patch does away with cacheline padding for the UP case, as it does not seem useful for UP configurations. Signed-off-by:
Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by:
Shai Fultheim <shai@scalex86.org> Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Pavel Emelianov authored
This causes constructions like down_write(&mm1->mmap_sem); if (down_write_trylock(&mm2->mmap_sem)) { ... up_write(&mm2->mmap_sem); } up_write(&mm1->mmap_sem); generate a lockdep warning about circular locking dependence. Call rwsem_acquire() with trylock set to 1. Cc: Ingo Molnar <mingo@elte.hu> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: -
Christoph Hellwig authored
Now that there is no arch-specific compat ioctl handling left there is not point in having a separate copat_ioctl.h, so merge it into compat_ioctl.c Signed-off-by:
Christoph Hellwig <hch@lst.de> Acked-by:
Arnd Bergmann <arnd@arndb.de> Acked-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Borislav Petkov authored
In a different approach here's a patch that handles the special case of composite arithmetic expressions in array size initializers. With it, prior to pushing the split strings on the @first_arg array, I split the keywords before the array name as before and then keep the array name along with the subscript expression as a single whole element which gets pushed last. In this manner, kernel-doc produces correct output without removing whitespaces which makes the array subscripts unreadable in the docs. Signed-off-by:
Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Milind Arun Choudhary authored
ROUND_UP macro cleanup use ALIGN Signed-off-by:
Milind Arun Choudhary <milindchoudhary@gmail.com> Signed-off-by:
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Milind Arun Choudhary authored
ROUND_UP macro cleanup use,ALIGN or DIV_ROUND_UP where ever appropriate. Signed-off-by:
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Randy Dunlap authored
drivers/parport/parport_serial.c:402: warning: ignoring return value of 'pci_enable_device', declared with attribute warn_unused_result Signed-off-by:
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Alexey Dobriyan authored
linux/module.h -> linux/elf.h -> asm-i386/elf.h -> linux/utsname.h -> linux/sched.h Noticeably cut the number of files which are rebuild upon touching sched.h and cut down pulled junk from every module.h inclusion. Signed-off-by:Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Milind Arun Choudhary authored
ROUND_UP macro cleanup use DIV_ROUND_UP Signed-off-by:
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Thomas Gleixner authored
The deprecation of the SA_xxx interrupt flags did not emit deprecated warnings. Andrew said about the removal of the deprecated flag defines: > This is going to break a lot of external stuff. We should have found > a way to make usage of SA_* emit deprecated warnings (or _some_ > warning) to warn people of impending doom. But I can't immediately > find a way of doing that. if we _can_ find a way of doing this, I > suspect we'll need to do it, and give people another six months. It's > going to get ugly out there. We shall see... Define the deprecated flags as a call to a __deprecated inline function so a warning is emitted on compile time. Extend the reprieve of out of tree drivers to 9/2007. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Acked-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Thomas Gleixner authored
Fix the last users of the deprecated SA_xxx interrupt flags. Signed-off-by:
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Bert Wesarg authored
This fixes the comment for the function param_array. Which lies that it only *temporarily* mangle the input string @val. Signed-off-by:
Bert Wesarg <wesarg@informatik.uni-halle.de> Signed-off-by:
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Alexey Dobriyan authored
Same story as with cat /proc/*/wchan race vs rmmod race, only /proc/slab_allocators want more info than just symbol name. Signed-off-by:
Alexey Dobriyan <adobriyan@sw.ru> Acked-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
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Alexey Dobriyan authored
kallsyms_lookup() can go iterating over modules list unprotected which is OK for emergency situations (oops), but not OK for regular stuff like /proc/*/wchan. Introduce lookup_symbol_name()/lookup_module_symbol_name() which copy symbol name into caller-supplied buffer or return -ERANGE. All copying is done with module_mutex held, so... Signed-off-by:
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Alexey Dobriyan authored
Several kallsyms_lookup() pass dummy arguments but only need, say, module's name. Make kallsyms_lookup() accept NULLs where possible. Also, makes picture clearer about what interfaces are needed for all symbol resolving business. Signed-off-by:
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Alexey Dobriyan authored
module_get_kallsym() leaks "struct module *" outside of module_mutex which is no-no, because module can dissapear right after mutex unlock. Copy all needed information from inside module_mutex into caller-supplied space. [bunk@stusta.de: is_exported() can now become static] Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Alexey Dobriyan authored
module_get_kallsym() could in theory truncate module symbol name to fit in buffer, but nobody does this. Always use KSYM_NAME_LEN + 1 bytes for name. Suggested by lg^WRusty. Signed-off-by:
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David Brownell authored
Teach PNPACPI how to hook up its devices to their ACPI nodes, so that pnpdev->dev.archdata points to the parallel acpi device node. Previously this only worked for PCI, leaving a notable hole. Export "acpi_bus_type" so this can work. Remove some extraneous whitespace. Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Cc: Adam Belay <ambx1@neo.rr.com> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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kalash nainwal authored
When a binary format is unregistered and re-registered, register_binfmt fails with -EBUSY. The reason is that unregister_binfmt does not set fmt->next to NULL, and seeing (fmt->next != NULL), register_binfmt fails with -EBUSY. One can find his way around by explicitly setting fmt->next to NULL after unregistering, but that is kind of unclean (one should better be using only the interfaces, and not the interal members, isn't it?) Attached one-liner can fix it. Signed-off-by:
Kalash Nainwal <kalash.nainwal@gmail.com> Signed-off-by:
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Ananth N Mavinakayanahalli authored
In certain cases like when the real return address can't be found or when the number of tracked calls to a kretprobed function is less than the number of returns, we may not be able to find the correct return address after processing a kretprobe. Currently we just do a BUG_ON, but no information is provided about the actual failing kretprobe. Print out details of the kretprobe before calling BUG(). Signed-off-by:
Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Cc: Jim Keniston <jkenisto@us.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: Maneesh Soni <maneesh@in.ibm.com> Signed-off-by:
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Ingo Molnar authored
enhance the initcall_debug boot option: - measure the time the initcall took to execute and report it in units of milliseconds. - show the return code of initcalls (useful to see failures and to make sure that an initcall hung) [akpm@linux-foundation.org: fix printk warning] Signed-off-by:
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Jan Engelhardt authored
Fix kevent's childs priority greediness. Such tasks were always scheduled at nice level -5 and, at that time, udev stole us the CPU time with -5. Already posted at http://lkml.org/lkml/2005/1/10/85 [akpm@linux-foundation.org: add comment] Signed-off-by:
Jan Engelhardt <jengelh@gmx.de> Cc: Chris Wright <chrisw@sous-sol.org> Signed-off-by:
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Simon Horman authored
Currently the size of the per-cpu region reserved to save crash notes is set by the per-architecture value MAX_NOTE_BYTES. Which in turn is currently set to 1024 on all supported architectures. While testing ia64 I recently discovered that this value is in fact too small. The particular setup I was using actually needs 1172 bytes. This lead to very tedious failure mode where the tail of one elf note would overwrite the head of another if they ended up being alocated sequentially by kmalloc, which was often the case. It seems to me that a far better approach is to caclculate the size that the area needs to be. This patch does just that. If a simpler stop-gap patch for ia64 to be squeezed into 2.6.21(.X) is needed then this should be as easy as making MAX_NOTE_BYTES larger in arch/asm-ia64/kexec.h. Perhaps 2048 would be a good choice. However, I think that the approach in this patch is a much more robust idea. Acked-by:
Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by:
Simon Horman <horms@verge.net.au> Signed-off-by:
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Ken Chen authored
Remove artificial maximum 256 loop device that can be created due to a legacy device number limit. Searching through lkml archive, there are several instances where users complained about the artificial limit that the loop driver impose. There is no reason to have such limit. This patch rid the limit entirely and make loop device and associated block queue instantiation on demand. With on-demand instantiation, it also gives the benefit of not wasting memory if these devices are not in use (compare to current implementation that always create 8 loop devices), a net improvement in both areas. This version is both tested with creation of large number of loop devices and is compatible with existing losetup/mount user land tools. There are a number of people who worked on this and provided valuable suggestions, in no particular order, by: Jens Axboe Jan Engelhardt Christoph Hellwig Thomas M Signed-off-by:
Ken Chen <kenchen@google.com> Cc: Jan Engelhardt <jengelh@linux01.gwdg.de> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by:
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Russell King authored
Instead of having /dev/port support dependent in multiple places on a string of preprocessor symbols, define a new configuration directive for it. This ensures that all four places remain consistent with each other. Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by:
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John Feeney authored
The 82875 EDAC driver enables an otherwise-hidden PCI device, but doesn't register it as a PCI device properly. Therefore, the device list in /proc/bus/pci/devices is different than the tree in /sys/bus/pci. This usually manifests as the X server failing to start, since it expects the two lists to be consistent. Signed-off-by:
Adam Jackson <ajackson@redhat.com> Cc: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: Greg KH <greg@kroah.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Doug Thompson <norsk5@xmission.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by:
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Randy Dunlap authored
Remove includes of <linux/smp_lock.h> where it is not used/needed. Suggested by Al Viro. Builds cleanly on x86_64, i386, alpha, ia64, powerpc, sparc, sparc64, and arm (all 59 defconfigs). Signed-off-by:
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Jeremy Fitzhardinge authored
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:
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Jeremy Fitzhardinge authored
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:
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john stultz authored
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:
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Eric Dumazet authored
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:
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Ahmed S. Darwish authored
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:
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Ralf Baechle authored
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:
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Venki Pallipadi authored
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:
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Venki Pallipadi authored
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:
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David Brownell authored
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:
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Jean Delvare authored
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:
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David Brownell authored
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:
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Dmitry Adamushko authored
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:
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