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* vt: introduce and use vt_kmsg_redirect() functionBernhard Walle2009-12-151-6/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kernel offers with TIOCL_GETKMSGREDIRECT ioctl() the possibility to redirect the kernel messages to a specific console. However, since it's not possible to switch to the kernel message console after a panic(), it would be nice if the kernel would print the panic message on the current console. This patch series adds a new interface to access the global kmsg_redirect variable by a function to be able to use it in code where CONFIG_VT_CONSOLE is not set (kernel/panic.c). This patch: Instead of using and exporting a global value kmsg_redirect, introduce a function vt_kmsg_redirect() that both can set and return the console where messages are printed. Change all users of kmsg_redirect (the VT code itself and kernel/power.c) to the new interface. The main advantage is that vt_kmsg_redirect() can also be used when CONFIG_VT_CONSOLE is not set. Signed-off-by: Bernhard Walle <bernhard@bwalle.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cs5535: drop the Geode-specific MFGPT/GPIO codeAndres Salomon2009-12-152-2/+2
| | | | | | | | | | | | | | | With generic modular drivers handling all of this stuff, the geode-specific code can go away. The cs5535-gpio, cs5535-mfgpt, and cs5535-clockevt drivers now handle this. Signed-off-by: Andres Salomon <dilinger@collabora.co.uk> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Cc: Chris Ball <cjb@laptop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cs5535: define lxfb/gxfb MSRs in linux/cs5535.hAndres Salomon2009-12-157-7/+7
| | | | | | | | | | | | | | ..and include them in the lxfb/gxfb drivers rather than asm/geode.h (where possible). Signed-off-by: Andres Salomon <dilinger@collabora.co.uk> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Cc: Chris Ball <cjb@laptop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cs5535: move VSA2 checks into linux/cs5535.hAndres Salomon2009-12-152-2/+2
| | | | | | | | | | | Signed-off-by: Andres Salomon <dilinger@collabora.co.uk> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Cc: Chris Ball <cjb@laptop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cs5535: add a generic clock event MFGPT driverAndres Salomon2009-12-154-0/+209
| | | | | | | | | | | | | | | | | This is based on the old code in arch/x86/kernel/mfgpt_32.c, but is modular and not Geode-specific. There's no reason why the clock event device needs to be registered so early at boot; the clockevent code is perfectly capable of dynamic switching. [akpm@linux-foundation.org: add linux/irq.h include] Signed-off-by: Andres Salomon <dilinger@collabora.co.uk> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Cc: Chris Ball <cjb@laptop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cs5535: add a generic MFGPT driverAndres Salomon2009-12-153-0/+395
| | | | | | | | | | | | | | | | | This is based on the old code on arch/x86/kernel/mfgpt_32.c, except it's not x86 specific, it's modular, and it makes use of a PCI BAR rather than a random MSR. Currently module unloading is not supported; it's uncertain whether or not it can be made work with the hardware. [akpm@linux-foundation.org: add X86 dependency] Signed-off-by: Andres Salomon <dilinger@collabora.co.uk> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Cc: Chris Ball <cjb@laptop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cs5535-gpio: request function, mask & names addedTobias Mueller2009-12-151-5/+78
| | | | | | | | | | | | | | | | | | | | | Changed number of gpio pins to 32 (according to datasheet) Added mask to disable some pins Added gpio_request for checking mask and disabling special pin functions Added pin names [dilinger@collabora.co.uk: make printk usage consistent] Signed-off-by: Tobias Mueller <Tobias_Mueller@twam.info> Signed-off-by: Andres Salomon <dilinger@collabora.co.uk> Cc: Takashi Iwai <tiwai@suse.de> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: David Brownell <david-b@pacbell.net> Cc: Alessandro Zummo <alessandro.zummo@towertech.it> Signed-off-by: Andres Salomon <dilinger@collabora.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cs5535-gpio: add AMD CS5535/CS5536 GPIO driver supportAndres Salomon2009-12-153-0/+293
| | | | | | | | | | | | | | | | | | | | This creates a CS5535/CS5536 GPIO driver which uses a gpio_chip backend (allowing GPIO users to use the generic GPIO API if desired) while also allowing architecture-specific users directly (via the cs5535_gpio_* functions). Tested on an OLPC machine. Some Leemotes also use CS5536 (with a mips cpu), which is why this is in drivers/gpio rather than arch/x86. Currently, it conflicts with older geode GPIO support; once MFGPT support is reworked to also be more generic, the older geode code will be removed. Signed-off-by: Andres Salomon <dilinger@collabora.co.uk> Cc: Takashi Iwai <tiwai@suse.de> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: David Brownell <david-b@pacbell.net> Reviewed-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/char/misc.c: use bitmap/bitops functions for dynamic minor number ↵Thadeu Lima de Souza Cascardo2009-12-151-13/+9Star
| | | | | | | | | | | | | | | | | allocation Use DECLARE_BITMAP(), find_first_zero_bit(), set_bit() and clear_bit() instead of rewriting code to do it with the minor number dynamic allocation bitmap. We need to invert the bit position to keep the code behaviour of using the last minor numbers first, since we don't have a find_last_zero_bit. Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> Cc: "H. Peter Anvin" <hpa@zytor.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>
* drivers/char/misc.c: clear allocation bit in minor bitmap when device ↵Thadeu Lima de Souza Cascardo2009-12-151-3/+5
| | | | | | | | | | | | | | | | | | register fails If there's a failure creating the device (because there's already one with the same name, for example), the current implementation does not clear the bit for the allocated minor and that number is lost for future allocations. Second, the test currently in misc_deregister is broken, since it does not test for the 0 minor. Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> Cc: "H. Peter Anvin" <hpa@zytor.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>
* ioc3/ioc4: fix error path on driver registrationJean Delvare2009-12-152-4/+14
| | | | | | | | | | Two IOC3 and IOC4 drivers have broken error paths on registration. Fix them. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Pat Gefre <pfg@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ioc3/ioc4: various section fixesJean Delvare2009-12-154-19/+20
| | | | | | | | | | | | | | Several IOC3 and IOC4 drivers misuse the __devinit and __devexit section markers. Use __init and __exit instead as appropriate, then add __devinit and __devexit where they really belong for PCI drivers. Also make ioc4_serial_init static. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Pat Gefre <pfg@sgi.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>
* misc: remove MAC pmu function declaration from misc device classThadeu Lima de Souza Cascardo2009-12-151-2/+0Star
| | | | | | | | | Commit 8c8709334cec803368a432a33e0f2e116d48fe07 has removed the pmu_device_init call from misc_init, but unlike other similar commits, has not removed its declaration. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/misc: add driver for Texas Instruments DAC7512Daniel Mack2009-12-153-0/+112
| | | | | | | | Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: "H Hartley Sweeten" <hartleys@visionengravers.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ad525x_dpot: new driver for AD525x digital potentiometersMichael Hennerich2009-12-153-0/+681
| | | | | | | | | | | | | | | This driver supports the non-volatile digital potentiometers via I2C: AD5258, AD5259, AD5251, AD5252, AD5253, AD5254, and AD5255 It provides a sysfs interface to each device for reading/writing which is documented in Documentation/misc-devices/ad525x_dpot.txt. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Chris Verges <chrisv@cyberswitching.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> 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>
* floppy: Add an extra bound check on ioctl argumentsArjan van de Ven2009-12-151-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | gcc is not convinced that the floppy.c ioctl has sufficient bound checks: In function `copy_from_user', inlined from `fd_copyin' at drivers/block/floppy.c:3080, inlined from `fd_ioctl' at drivers/block/floppy.c:3503: arch/x86/include/asm/uaccess_32.h:211: warning: call to `copy_from_user_overflow' declared with attribute warning: copy_from_user buffer size is not provably correct And frankly, as a human I have a hard time proving the same more or less (the size comes from the ioctl argument. humpf. maybe. the code isn't very nice) This patch adds an explicit check to make 100% sure it's safe, better than finding out later that there indeed was a gap. [akpm@linux-foundation.org: add WARN_ON()] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> 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>
* drivers/cpuidle: Move dereference after NULL testJulia Lawall2009-12-151-3/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | It does not seem possible that ldev can be NULL, so drop the unnecessary test. If ldev can somehow be NULL, then the initialization of last_idx should be moved below the test. A simplified version of the semantic match that detects this problem is as follows (http://coccinelle.lip6.fr/): // <smpl> @match exists@ expression x, E; identifier fld; @@ * x->fld ... when != \(x = E\|&x\) * x == NULL // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Acked-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* const: constify remaining dev_pm_opsAlexey Dobriyan2009-12-1566-66/+66
| | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: slab-allocate memory section nodemask for large systemsDavid Rientjes2009-12-151-4/+9
| | | | | | | | | | | | | | | | | | | Nodemasks should not be allocated on the stack for large systems (when it is larger than 256 bytes) since there is a threat of overflow. This patch causes the unregister_mem_sect_under_nodes() nodemask to be allocated on the stack for smaller systems and be allocated by slab for larger systems. GFP_KERNEL is used since remove_memory_block() can block. Cc: Gary Hade <garyhade@us.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Alex Chiang <achiang@hp.com> Signed-off-by: David Rientjes <rientjes@google.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: add numa node symlink for cpu devices in sysfsAlex Chiang2009-12-151-1/+10
| | | | | | | | | | | | | | | | | | | | | | | | You can discover which CPUs belong to a NUMA node by examining /sys/devices/system/node/node#/ However, it's not convenient to go in the other direction, when looking at /sys/devices/system/cpu/cpu#/ Yes, you can muck about in sysfs, but adding these symlinks makes life a lot more convenient. Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Gary Hade <garyhade@us.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Rientjes <rientjes@google.com> Cc: Greg KH <greg@kroah.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: David Rientjes <rientjes@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: refactor unregister_cpu_under_node()Alex Chiang2009-12-151-6/+12
| | | | | | | | | | | | | | | | | | | By returning early if the node is not online, we can unindent the interesting code by two levels. No functional change. Signed-off-by: Alex Chiang <achiang@hp.com> Cc: Gary Hade <garyhade@us.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Rientjes <rientjes@google.com> Cc: Greg KH <greg@kroah.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: David Rientjes <rientjes@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: refactor register_cpu_under_node()Alex Chiang2009-12-151-9/+11
| | | | | | | | | | | | | | | | | | | By returning early if the node is not online, we can unindent the interesting code by one level. No functional change. Signed-off-by: Alex Chiang <achiang@hp.com> Cc: Gary Hade <garyhade@us.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Rientjes <rientjes@google.com> Cc: Greg KH <greg@kroah.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: David Rientjes <rientjes@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: add numa node symlink for memory section in sysfsAlex Chiang2009-12-151-1/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | Commit c04fc586c (mm: show node to memory section relationship with symlinks in sysfs) created symlinks from nodes to memory sections, e.g. /sys/devices/system/node/node1/memory135 -> ../../memory/memory135 If you're examining the memory section though and are wondering what node it might belong to, you can find it by grovelling around in sysfs, but it's a little cumbersome. Add a reverse symlink for each memory section that points back to the node to which it belongs. Signed-off-by: Alex Chiang <achiang@hp.com> Cc: Gary Hade <garyhade@us.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: David Rientjes <rientjes@google.com> Cc: Greg KH <greg@kroah.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: David Rientjes <rientjes@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hugetlb: offload per node attribute registrationsLee Schermerhorn2009-12-151-10/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Offload the registration and unregistration of per node hstate sysfs attributes to a worker thread rather than attempt the allocation/attachment or detachment/freeing of the attributes in the context of the memory hotplug handler. I don't know that this is absolutely required, but the registration can sleep in allocations and other mem hot plug handlers do it this way. If it turns out this is NOT required, we can drop this patch. N.B., Only tested build, boot, libhugetlbfs regression. i.e., no memory hotplug testing. Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Reviewed-by: Andi Kleen <andi@firstfloor.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Nishanth Aravamudan <nacc@us.ibm.com> Cc: David Rientjes <rientjes@google.com> Cc: Adam Litke <agl@us.ibm.com> Cc: Andy Whitcroft <apw@canonical.com> Cc: Eric Whitney <eric.whitney@hp.com> Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hugetlb: handle memory hot-plug eventsLee Schermerhorn2009-12-151-5/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Register per node hstate attributes only for nodes with memory. As suggested by David Rientjes. With Memory Hotplug, memory can be added to a memoryless node and a node with memory can become memoryless. Therefore, add a memory on/off-line notifier callback to [un]register a node's attributes on transition to/from memoryless state. N.B., Only tested build, boot, libhugetlbfs regression. i.e., no memory hotplug testing. Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Reviewed-by: Andi Kleen <andi@firstfloor.org> Acked-by: David Rientjes <rientjes@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Nishanth Aravamudan <nacc@us.ibm.com> Cc: Adam Litke <agl@us.ibm.com> Cc: Andy Whitcroft <apw@canonical.com> Cc: Eric Whitney <eric.whitney@hp.com> Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hugetlb: add per node hstate attributesLee Schermerhorn2009-12-151-0/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the per huge page size control/query attributes to the per node sysdevs: /sys/devices/system/node/node<ID>/hugepages/hugepages-<size>/ nr_hugepages - r/w free_huge_pages - r/o surplus_huge_pages - r/o The patch attempts to re-use/share as much of the existing global hstate attribute initialization and handling, and the "nodes_allowed" constraint processing as possible. Calling set_max_huge_pages() with no node indicates a change to global hstate parameters. In this case, any non-default task mempolicy will be used to generate the nodes_allowed mask. A valid node id indicates an update to that node's hstate parameters, and the count argument specifies the target count for the specified node. From this info, we compute the target global count for the hstate and construct a nodes_allowed node mask contain only the specified node. Setting the node specific nr_hugepages via the per node attribute effectively ignores any task mempolicy or cpuset constraints. With this patch: (me):ls /sys/devices/system/node/node0/hugepages/hugepages-2048kB ./ ../ free_hugepages nr_hugepages surplus_hugepages Starting from: Node 0 HugePages_Total: 0 Node 0 HugePages_Free: 0 Node 0 HugePages_Surp: 0 Node 1 HugePages_Total: 0 Node 1 HugePages_Free: 0 Node 1 HugePages_Surp: 0 Node 2 HugePages_Total: 0 Node 2 HugePages_Free: 0 Node 2 HugePages_Surp: 0 Node 3 HugePages_Total: 0 Node 3 HugePages_Free: 0 Node 3 HugePages_Surp: 0 vm.nr_hugepages = 0 Allocate 16 persistent huge pages on node 2: (me):echo 16 >/sys/devices/system/node/node2/hugepages/hugepages-2048kB/nr_hugepages [Note that this is equivalent to: numactl -m 2 hugeadmin --pool-pages-min 2M:+16 ] Yields: Node 0 HugePages_Total: 0 Node 0 HugePages_Free: 0 Node 0 HugePages_Surp: 0 Node 1 HugePages_Total: 0 Node 1 HugePages_Free: 0 Node 1 HugePages_Surp: 0 Node 2 HugePages_Total: 16 Node 2 HugePages_Free: 16 Node 2 HugePages_Surp: 0 Node 3 HugePages_Total: 0 Node 3 HugePages_Free: 0 Node 3 HugePages_Surp: 0 vm.nr_hugepages = 16 Global controls work as expected--reduce pool to 8 persistent huge pages: (me):echo 8 >/sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages Node 0 HugePages_Total: 0 Node 0 HugePages_Free: 0 Node 0 HugePages_Surp: 0 Node 1 HugePages_Total: 0 Node 1 HugePages_Free: 0 Node 1 HugePages_Surp: 0 Node 2 HugePages_Total: 8 Node 2 HugePages_Free: 8 Node 2 HugePages_Surp: 0 Node 3 HugePages_Total: 0 Node 3 HugePages_Free: 0 Node 3 HugePages_Surp: 0 Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Reviewed-by: Andi Kleen <andi@firstfloor.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Nishanth Aravamudan <nacc@us.ibm.com> Cc: David Rientjes <rientjes@google.com> Cc: Adam Litke <agl@us.ibm.com> Cc: Andy Whitcroft <apw@canonical.com> Cc: Eric Whitney <eric.whitney@hp.com> Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* /dev/mem: remove redundant parameter from do_write_kmem()Wu Fengguang2009-12-151-8/+6Star
| | | | | | | | | | | | Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Avi Kivity <avi@qumranet.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* /dev/mem: remove the "written" variable in write_kmem()Wu Fengguang2009-12-151-27/+22Star
| | | | | | | | | | | | | | Also rename "len" to "sz". No behavior change. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Avi Kivity <avi@qumranet.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* /dev/mem: make size_inside_page() logic straightWu Fengguang2009-12-151-22/+12Star
| | | | | | | | | | | | | | Also convert more size_inside_page() users. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Avi Kivity <avi@qumranet.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* /dev/mem: cleanup unxlate_dev_mem_ptr() callsWu Fengguang2009-12-151-8/+6Star
| | | | | | | | | | | | | | | | No behaviour change. [akpm@linux-foundation.org: cleanuplets] [akpm@linux-foundation.org: remove unused `ret'] Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Acked-by: Andi Kleen <ak@linux.intel.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* /dev/mem: introduce size_inside_page()Wu Fengguang2009-12-151-41/+19Star
| | | | | | | | | | | | | | | | Introduce size_inside_page() to replace duplicate /dev/mem code. Also apply it to /dev/kmem, whose alignment logic was buggy. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Acked-by: Andi Kleen <ak@linux.intel.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* /dev/mem: remove redundant test on lenWu Fengguang2009-12-151-8/+6Star
| | | | | | | | | | | | | | The len test in write_kmem() is always true, so can be reduced. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Acked-by: Andi Kleen <ak@linux.intel.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'i2c-for-linus' of ↵Linus Torvalds2009-12-1448-321/+228Star
|\ | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging * 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: i2c-core: i2c bus should support PM entries in struct dev_pm_ops i2c: Get rid of I2C_CLIENT_MODULE_PARM i2c: Drop I2C_CLIENT_INSMOD_2 to 8 i2c: Drop I2C_CLIENT_INSMOD_1 i2c: Get rid of struct i2c_client_address_data i2c: Drop the kind parameter from detect callbacks
| * i2c-core: i2c bus should support PM entries in struct dev_pm_opssonic zhang2009-12-141-0/+35
| | | | | | | | | | | | | | | | | | Struct dev_pm_ops is not configured in current i2c bus type. i2c drivers only depends on suspend/resume entries in struct dev_pm_ops are not informed of PM suspend and resume events by i2c framework. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| * i2c: Drop I2C_CLIENT_INSMOD_2 to 8Jean Delvare2009-12-1418-51/+26Star
| | | | | | | | | | | | | | | | | | These macros simply declare an enum, so drivers might as well declare it themselves. This puts an end to the arbitrary limit of 8 chip types per i2c driver. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
| * i2c: Drop I2C_CLIENT_INSMOD_1Jean Delvare2009-12-1429-116/+30Star
| | | | | | | | | | | | | | | | This macro simply declares an enum, so drivers might as well declare it themselves. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
| * i2c: Get rid of struct i2c_client_address_dataJean Delvare2009-12-1448-55/+54Star
| | | | | | | | | | | | | | | | | | Struct i2c_client_address_data only contains one field at this point, which makes its usefulness questionable. Get rid of it and pass simple address lists around instead. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
| * i2c: Drop the kind parameter from detect callbacksJean Delvare2009-12-1448-99/+83Star
| | | | | | | | | | | | | | | | The "kind" parameter always has value -1, and nobody is using it any longer, so we can remove it. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
* | Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2009-12-142-33/+27Star
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, mce: Clean up thermal init by introducing intel_thermal_supported() x86, mce: Thermal monitoring depends on APIC being enabled x86: Gart: fix breakage due to IOMMU initialization cleanup x86: Move swiotlb initialization before dma32_free_bootmem x86: Fix build warning in arch/x86/mm/mmio-mod.c x86: Remove usedac in feature-removal-schedule.txt x86: Fix duplicated UV BAU interrupt vector nvram: Fix write beyond end condition; prove to gcc copy is safe mm: Adjust do_pages_stat() so gcc can see copy_from_user() is safe x86: Limit the number of processor bootup messages x86: Remove enabling x2apic message for every CPU doc: Add documentation for bootloader_{type,version} x86, msr: Add support for non-contiguous cpumasks x86: Use find_e820() instead of hard coded trampoline address x86, AMD: Fix stale cpuid4_info shared_map data in shared_cpu_map cpumasks Trivial percpu-naming-introduced conflicts in arch/x86/kernel/cpu/intel_cacheinfo.c
| * | nvram: Fix write beyond end condition; prove to gcc copy is safeH. Peter Anvin2009-12-121-4/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In nvram_write, first of all, correctly handle the case where the file pointer is already beyond the end; we should return EOF in that case. Second, make the logic a bit more explicit so that gcc can statically prove that the copy_from_user() is safe. Once the condition of the beyond-end filepointer is eliminated, the copy is safe but gcc can't prove it, causing build failures for i386 allyesconfig. Third, eliminate the entirely superfluous variable "len", and just use the passed-in variable "count" instead. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Wim Van Sebroeck <wim@iguana.be> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <tip-*@git.kernel.org>
| * | x86, msr: Add support for non-contiguous cpumasksBorislav Petkov2009-12-111-29/+17Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current rd/wrmsr_on_cpus helpers assume that the supplied cpumasks are contiguous. However, there are machines out there like some K8 multinode Opterons which have a non-contiguous core enumeration on each node (e.g. cores 0,2 on node 0 instead of 0,1), see http://www.gossamer-threads.com/lists/linux/kernel/1160268. This patch fixes out-of-bounds writes (see URL above) by adding per-CPU msr structs which are used on the respective cores. Additionally, two helpers, msrs_{alloc,free}, are provided for use by the callers of the MSR accessors. Cc: H. Peter Anvin <hpa@zytor.com> Cc: Mauro Carvalho Chehab <mchehab@redhat.com> Cc: Aristeu Rozanski <aris@redhat.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> LKML-Reference: <20091211171440.GD31998@aftab> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6Linus Torvalds2009-12-1421-389/+485
|\ \ \ | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6: pcmcia: CodingStyle fixes pcmcia: remove unused IRQ_FIRST_SHARED
| * | | pcmcia: CodingStyle fixesDominik Brodowski2009-12-0711-377/+475
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix several CodingStyle issues in drivers/pcmcia/ . checkpatch.pl no longer reports errors in the PCMCIA core. The remaining warnings mostly relate to wrong indent -- PCMCIA historically used 4 spaces --, to lines over 80 characters and to hundreds of typedefs. The cleanup of those will follow in the future. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
| * | | pcmcia: remove unused IRQ_FIRST_SHAREDDominik Brodowski2009-12-0710-12/+10Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Komuro pointed out that IRQ_FIRST_SHARED is not used at all in the PCMCIA subsystem, so remove it. Also, remove two bogus assignments. CC: Karsten Keil <keil@b1-systems.de> CC: netdev@vger.kernel.org CC: alsa-devel@alsa-project.org CC: Komuro <komurojun-mbn@nifty.com> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
* | | | Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds2009-12-1414-219/+2418
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'next-spi' of git://git.secretlab.ca/git/linux-2.6: (23 commits) spi: fix probe/remove section markings Add OMAP spi100k driver spi-imx: don't access struct device directly but use dev_get_platdata spi-imx: Add mx25 support spi-imx: use positive logic to distinguish cpu variants spi-imx: correct check for platform_get_irq failing ARM: NUC900: Add spi driver support for nuc900 spi: SuperH MSIOF SPI Master driver V2 spi: fix spidev compilation failure when VERBOSE is defined spi/au1550_spi: fix setupxfer not to override cfg with zeros spi/mpc8xxx: don't use __exit_p to wrap plat_mpc8xxx_spi_remove spi/i.MX: fix broken error handling for gpio_request spi/i.mx: drain MXC SPI transfer buffer when probing device MAINTAINERS: add SPI co-maintainer. spi/xilinx_spi: fix incorrect casting spi/mpc52xx-spi: minor cleanups xilinx_spi: add a platform driver using the xilinx_spi common module. xilinx_spi: add support for the DS570 IP. xilinx_spi: Switch to iomem functions and support little endian. xilinx_spi: Split into of driver and generic part. ...
| * | | | spi: fix probe/remove section markingsGrant Likely2009-12-131-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Probe/remove functions need to be marked as __devinit and __devexit (not __init an __exit) to prevent trying to run code that has been discarded. This patch fixes the spi_imx driver to mark probe and remove correctly. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | | Add OMAP spi100k driverCory Maccarrone2009-12-133-0/+642
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change adds the OMAP SPI 100k driver created by Fabrice Crohas <fcrohas@gmail.com>. This SPI bus is found on OMAP7xx-series smartphones, and for many, the touchscreen is attached to this bus. The lion's share of the work was done by Fabrice on this driver -- I am merely porting it from the Linwizard project on his behalf. Signed-off-by: Cory Maccarrone <darkstar6262@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | | spi-imx: don't access struct device directly but use dev_get_platdataUwe Kleine-König2009-12-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Also there is no casting needed to assign a void pointer. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | | spi-imx: Add mx25 supportSascha Hauer2009-12-131-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | | spi-imx: use positive logic to distinguish cpu variantsUwe Kleine-König2009-12-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is much safer when support for new variants is added. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-27 15:16:47 +0200