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2008-10-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds4-15/+495
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (46 commits) UIO: Fix mapping of logical and virtual memory UIO: add automata sercos3 pci card support UIO: Change driver name of uio_pdrv UIO: Add alignment warnings for uio-mem Driver core: add bus_sort_breadthfirst() function NET: convert the phy_device file to use bus_find_device_by_name kobject: Cleanup kobject_rename and !CONFIG_SYSFS kobject: Fix kobject_rename and !CONFIG_SYSFS sysfs: Make dir and name args to sysfs_notify() const platform: add new device registration helper sysfs: use ilookup5() instead of ilookup5_nowait() PNP: create device attributes via default device attributes Driver core: make bus_find_device_by_name() more robust usb: turn dev_warn+WARN_ON combos into dev_WARN debug: use dev_WARN() rather than WARN_ON() in device_pm_add() debug: Introduce a dev_WARN() function sysfs: fix deadlock device model: Do a quickcheck for driver binding before doing an expensive check Driver core: Fix cleanup in device_create_vargs(). Driver core: Clarify device cleanup. ...
2008-10-16introduce generic iommu_num_pages functionJoerg Roedel1-0/+9
This patch introduces the generic iommu_num_pages function. It can be used by a given memory area. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Muli Ben-Yehuda <muli@il.ibm.com> Cc: Dave Airlie <airlied@linux.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16Add kerneldoc documentation for new printk format extensionsAndi Kleen1-0/+12
Add documentation in kerneldoc for new printk format extensions This patch documents the new %pS/%pF options in printk in kernel doc. Hope I didn't miss any other extension. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16Kconfig: eliminate "def_bool n" constructsJan Beulich1-2/+2
Using "def_bool n" is pointless, simply using bool here appears more appropriate. Further, retaining such options that don't have a prompt and aren't selected by anything seems also at least questionable. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Tony Luck <tony.luck@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16kobject: Cleanup kobject_rename and !CONFIG_SYSFSEric W. Biederman1-2/+15
It finally dawned on me what the clean fix to sysfs_rename_dir calling kobject_set_name is. Move the work into kobject_rename where it belongs. The callers serialize us anyway so this is safe. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-10-16kobject: Fix kobject_rename and !CONFIG_SYSFSEric W. Biederman1-13/+5
When looking at kobject_rename I found two bugs with that exist when sysfs support is disabled in the kernel. kobject_rename does not change the name on the kobject when sysfs support is not compiled in. kobject_rename without locking attempts to check the validity of a rename operation, which the kobject layer simply does not have the infrastructure to do. This patch documents the previously unstated requirement of kobject_rename that is the responsibility of the caller to provide mutual exclusion and to be certain that the new_name for the kobject is valid. This patch modifies sysfs_rename_dir in !CONFIG_SYSFS case to call kobject_set_name to actually change the kobject_name. This patch removes the bogus and misleading check in kobject_rename that attempts to see if a rename is valid. The check is bogus because we do not have the proper locking. The check is misleading because it looks like we can and do perform checking at the kobject level that we don't. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-10-16driver core: basic infrastructure for per-module dynamic debug messagesJason Baron3-0/+475
Base infrastructure to enable per-module debug messages. I've introduced CONFIG_DYNAMIC_PRINTK_DEBUG, which when enabled centralizes control of debugging statements on a per-module basis in one /proc file, currently, <debugfs>/dynamic_printk/modules. When, CONFIG_DYNAMIC_PRINTK_DEBUG, is not set, debugging statements can still be enabled as before, often by defining 'DEBUG' for the proper compilation unit. Thus, this patch set has no affect when CONFIG_DYNAMIC_PRINTK_DEBUG is not set. The infrastructure currently ties into all pr_debug() and dev_dbg() calls. That is, if CONFIG_DYNAMIC_PRINTK_DEBUG is set, all pr_debug() and dev_dbg() calls can be dynamically enabled/disabled on a per-module basis. Future plans include extending this functionality to subsystems, that define their own debug levels and flags. Usage: Dynamic debugging is controlled by the debugfs file, <debugfs>/dynamic_printk/modules. This file contains a list of the modules that can be enabled. The format of the file is as follows: <module_name> <enabled=0/1> . . . <module_name> : Name of the module in which the debug call resides <enabled=0/1> : whether the messages are enabled or not For example: snd_hda_intel enabled=0 fixup enabled=1 driver enabled=0 Enable a module: $echo "set enabled=1 <module_name>" > dynamic_printk/modules Disable a module: $echo "set enabled=0 <module_name>" > dynamic_printk/modules Enable all modules: $echo "set enabled=1 all" > dynamic_printk/modules Disable all modules: $echo "set enabled=0 all" > dynamic_printk/modules Finally, passing "dynamic_printk" at the command line enables debugging for all modules. This mode can be turned off via the above disable command. [gkh: minor cleanups and tweaks to make the build work quietly] Signed-off-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-10-13vfs: Use const for kernel parser tableSteven Whitehouse1-1/+1
This is a much better version of a previous patch to make the parser tables constant. Rather than changing the typedef, we put the "const" in all the various places where its required, allowing the __initconst exception for nfsroot which was the cause of the previous trouble. This was posted for review some time ago and I believe its been in -mm since then. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Alexander Viro <aviro@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-12Merge branches 'x86/xen', 'x86/build', 'x86/microcode', 'x86/mm-debug-v2', 'x86/memory-corruption-check', 'x86/early-printk', 'x86/xsave', 'x86/ptrace-v2', 'x86/quirks', 'x86/setup', 'x86/spinlocks' and 'x86/signal' into x86/core-v2Ingo Molnar2-1/+10
2008-10-12Merge branch 'linus' into x86/xenIngo Molnar7-65/+208
Conflicts: arch/x86/kernel/cpu/common.c arch/x86/kernel/process_64.c arch/x86/xen/enlighten.c
2008-10-11Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4Linus Torvalds1-5/+3
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (43 commits) ext4: Rename ext4dev to ext4 ext4: Avoid double dirtying of super block in ext4_put_super() Update ext4 MAINTAINERS file Hook ext4 to the vfs fiemap interface. generic block based fiemap implementation ocfs2: fiemap support vfs: vfs-level fiemap interface ext4: fix xattr deadlock jbd2: Fix buffer head leak when writing the commit block ext4: Add debugging markers that can be used by systemtap jbd2: abort instead of waiting for nonexistent transaction ext4: fix initialization of UNINIT bitmap blocks ext4: Remove old legacy block allocator ext4: Use readahead when reading an inode from the inode table ext4: Improve the documentation for ext4's /proc tunables ext4: Combine proc file handling into a single set of functions ext4: move /proc setup and teardown out of mballoc.c ext4: Don't use 'struct dentry' for internal lookups ext4/jbd2: Avoid WARN() messages when failing to write to the superblock ext4: use percpu data structures for lg_prealloc_list ...
2008-10-11Merge phase #3 (IOMMU) of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tipLinus Torvalds2-32/+22
* 'x86-v28-for-linus-phase3-B' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (74 commits) AMD IOMMU: use iommu_device_max_index, fix AMD IOMMU: use iommu_device_max_index x86: add PCI IDs for AMD Barcelona PCI devices x86/iommu: use __GFP_ZERO instead of memset for GART x86/iommu: convert GART need_flush to bool x86/iommu: make GART driver checkpatch clean x86 gart: remove unnecessary initialization x86: restore old GART alloc_coherent behavior revert "x86: make GART to respect device's dma_mask about virtual mappings" x86: export pci-nommu's alloc_coherent iommu: remove fullflush and nofullflush in IOMMU generic option x86: remove set_bit_string() iommu: export iommu_area_reserve helper function AMD IOMMU: use coherent_dma_mask in alloc_coherent add AMD IOMMU tree to MAINTAINERS file AMD IOMMU: use cmd_buf_size when freeing the command buffer AMD IOMMU: calculate IVHD size with a function AMD IOMMU: remove unnecessary cast to u64 in the init code AMD IOMMU: free domain bitmap with its allocation order AMD IOMMU: simplify dma_mask_to_pages ...
2008-10-10Merge branch 'rcu-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tipLinus Torvalds1-0/+13
* 'rcu-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (21 commits) rcu: RCU-based detection of stalled CPUs for Classic RCU, fix rcu: RCU-based detection of stalled CPUs for Classic RCU rcu: add rcu_read_lock_sched() / rcu_read_unlock_sched() rcu: fix sparse shadowed variable warning doc/RCU: fix pseudocode in rcuref.txt rcuclassic: fix compiler warning rcu: use irq-safe locks rcuclassic: fix compilation NG rcu: fix locking cleanup fallout rcu: remove redundant ACCESS_ONCE definition from rcupreempt.c rcu: fix classic RCU locking cleanup lockdep problem rcu: trace fix possible mem-leak rcu: just rename call_rcu_bh instead of making it a macro rcu: remove list_for_each_rcu() rcu: fixes to include/linux/rcupreempt.h rcu: classic RCU locking and memory-barrier cleanups rcu: prevent console flood when one CPU sees another AWOL via RCU rcu, debug: detect stalled grace periods, cleanups rcu, debug: detect stalled grace periods rcu classic: new algorithm for callbacks-processing(v2) ...
2008-10-10Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds2-1/+66
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (37 commits) [SCSI] zfcp: fix double dbf id usage [SCSI] zfcp: wait on SCSI work to be finished before proceeding with init dev [SCSI] zfcp: fix erp list usage without using locks [SCSI] zfcp: prevent fc_remote_port_delete calls for unregistered rport [SCSI] zfcp: fix deadlock caused by shared work queue tasks [SCSI] zfcp: put threshold data in hba trace [SCSI] zfcp: Simplify zfcp data structures [SCSI] zfcp: Simplify get_adapter_by_busid [SCSI] zfcp: remove all typedefs and replace them with standards [SCSI] zfcp: attach and release SAN nameserver port on demand [SCSI] zfcp: remove unused references, declarations and flags [SCSI] zfcp: Update message with input from review [SCSI] zfcp: add queue_full sysfs attribute [SCSI] scsi_dh: suppress comparison warning [SCSI] scsi_dh: add Dell product information into rdac device handler [SCSI] qla2xxx: remove the unused SCSI_QLOGIC_FC_FIRMWARE option [SCSI] qla2xxx: fix printk format warnings [SCSI] qla2xxx: Update version number to 8.02.01-k8. [SCSI] qla2xxx: Ignore payload reserved-bits during RSCN processing. [SCSI] qla2xxx: Additional residual-count corrections during UNDERRUN handling. ...
2008-10-09block: add fault injection mechanism for faking request timeoutsJens Axboe1-1/+12
Only works for the generic request timer handling. Allows one to sporadically ignore request completions, thus exercising the timeout handling. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09init: DEBUG_BLOCK_EXT_DEVT requires explicit root= paramTejun Heo1-0/+6
DEBUG_BLOCK_EXT_DEVT shuffles SCSI and IDE device numbers and root device number set using rdev become meaningless. Root devices should be explicitly specified using textual names. Warn about it if root can't be found and DEBUG_BLOCK_EXT_DEVT is enabled. Also, add warning to the help text. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09Change default value of CONFIG_DEBUG_BLOCK_EXT_DEVT to 'n'Jens Axboe1-1/+1
It's a debug option that you would explicitly enable to test this feature, we should default it to 'n' to prevent accidental surprises for now. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: implement CONFIG_DEBUG_BLOCK_EXT_DEVTTejun Heo1-0/+16
Extended devt introduces non-contiguos device numbers. This patch implements a debug option which forces most devt allocations to be from the extended area and spreads them out. This is enabled by default if DEBUG_KERNEL is set and achieves... 1. Detects code paths in kernel or userland which expect predetermined consecutive device numbers. 2. When something goes wrong, avoid corruption as adding to the minor of earlier partition won't lead to the wrong but valid device. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09klist: don't iterate over deleted entriesTejun Heo1-26/+70
A klist entry is kept on the list till all its current iterations are finished; however, a new iteration after deletion also iterates over deleted entries as long as their reference count stays above zero. This causes problems for cases where there are users which iterate over the list while synchronized against list manipulations and natuarally expect already deleted entries to not show up during iteration. This patch implements dead flag which gets set on deletion so that iteration can skip already deleted entries. The dead flag piggy backs on the lowest bit of knode->n_klist and only visible to klist implementation proper. While at it, drop klist_iter->i_head as it's redundant and doesn't offer anything in semantics or performance wise as klist_iter->i_klist is dereferenced on every iteration anyway. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-03[SCSI] lib: add generic helper to print sizes rounded to the correct SI rangeJames Bottomley2-1/+66
This patch adds the ability to print sizes in either units of 10^3 (SI) or 2^10 (Binary) units. It rounds up to three significant figures and can be used for either memory or storage capacities. Oh, and I'm fully aware that 64 bits is only 16EiB ... the Zetta and Yotta units are added for future proofing against the day we have 128 bit computers ... [fujita.tomonori@lab.ntt.co.jp: fix missed unsigned long long cast] Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-10-03rcu: RCU-based detection of stalled CPUs for Classic RCUPaul E. McKenney1-1/+1
This patch adds stalled-CPU detection to Classic RCU. This capability is enabled by a new config variable CONFIG_RCU_CPU_STALL_DETECTOR, which defaults disabled. This is a debugging feature to detect infinite loops in kernel code, not something that non-kernel-hackers would be expected to care about. This feature can detect looping CPUs in !PREEMPT builds and looping CPUs with preemption disabled in PREEMPT builds. This is essentially a port of this functionality from the treercu patch, replacing the stall debug patch that is already in tip/core/rcu (commit 67182ae1c4). The changes from the patch in tip/core/rcu include making the config variable name match that in treercu, changing from seconds to jiffies to avoid spurious warnings, and printing a boot message when this feature is enabled. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-03Merge commit 'v2.6.27-rc8' into core/rcuIngo Molnar2-1/+5
2008-09-23Merge branch 'timers/urgent' into x86/xenIngo Molnar2-1/+5
Conflicts: arch/x86/kernel/process_32.c arch/x86/kernel/process_64.c Manual merge: arch/x86/kernel/smpboot.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-22iommu: export iommu_area_reserve helper functionFUJITA Tomonori1-3/+2
x86 has set_bit_string() that does the exact same thing that set_bit_area() in lib/iommu-helper.c does. This patch exports set_bit_area() in lib/iommu-helper.c as iommu_area_reserve(), converts GART, Calgary, and AMD IOMMU to use it. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-19convert swiotlb to use dma_get_maskFUJITA Tomonori1-5/+1
swiotlb can use dma_get_mask() instead of the homegrown function. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: tony.luck@intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-14Merge branch 'linus' into x86/iommuIngo Molnar1-0/+4
Conflicts: lib/swiotlb.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-11Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds1-0/+4
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: sg: disable interrupts inside sg_copy_buffer
2008-09-11sg: disable interrupts inside sg_copy_bufferFUJITA Tomonori1-0/+4
The callers of sg_copy_buffer must disable interrupts before calling it (since it uses kmap_atomic). Some callers use it on interrupt-disabled code but some need to take the trouble to disable interrupts just for this. No wonder they forget about it and we hit a bug like: http://bugzilla.kernel.org/show_bug.cgi?id=11529 James said that it might be better to disable interrupts inside the function rather than risk the callers getting it wrong. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-09-10swiotlb: fix back-off path when memory allocation failsDaniel J Blueman1-1/+1
This fixes a SWIOTLB oops With SWIOTLB being enabled and straight-forward page allocation failure [1], the swiotlb_alloc_coherent fall-back path hits an issue [2], resulting in my webcam failing to work. At the time of oops, RDI is clearly a pointer to a structure which has arrived as NULL, leading to the typo in swiotlb_map_single's callsite arguments. Correctly passing the device structure [3] addresses the issue and gets my webcam working again (the allocation failure still occuring). --- [1] skype: page allocation failure. order:3, mode:0x1 Pid: 5895, comm: skype Not tainted 2.6.27-rc6-235c-debug #1 Call Trace: [<ffffffff802b7cf0>] __alloc_pages_internal+0x4a0/0x5d0 [<ffffffff802d5ddd>] alloc_pages_current+0xad/0x110 [<ffffffff802b4ccd>] __get_free_pages+0x1d/0x60 [<ffffffff8046cd39>] swiotlb_alloc_coherent+0x49/0x180 [<ffffffff80212731>] dma_alloc_coherent+0x281/0x310 [<ffffffff805621c0>] hcd_buffer_alloc+0x50/0x90 [<ffffffff805547fd>] usb_buffer_alloc+0x2d/0x40 [<ffffffffa0056763>] uvc_alloc_urb_buffers+0x53/0xf0 [uvcvideo] [<ffffffffa0056958>] uvc_init_video+0x158/0x3e0 [uvcvideo] [<ffffffffa0056c17>] uvc_video_enable+0x37/0x80 [uvcvideo] [<ffffffffa0055853>] uvc_v4l2_do_ioctl+0x723/0x1260 [uvcvideo] [<ffffffff8026dd61>] ? trace_hardirqs_off_caller+0x21/0xc0 [<ffffffff8026dd61>] ? trace_hardirqs_off_caller+0x21/0xc0 [<ffffffffa0032c9f>] video_usercopy+0x19f/0x390 [videodev] [<ffffffffa0055130>] ? uvc_v4l2_do_ioctl+0x0/0x1260 [uvcvideo] [<ffffffff8026d0ce>] ? put_lock_stats+0xe/0x30 [<ffffffffa0054dad>] uvc_v4l2_ioctl+0x4d/0x80 [uvcvideo] [<ffffffffa0045083>] native_ioctl+0x83/0x90 [compat_ioctl32] [<ffffffffa004534e>] v4l_compat_ioctl32+0x2be/0x1da4 [compat_ioctl32] [<ffffffff806aad21>] ? do_page_fault+0x3d1/0xae0 [<ffffffff80270ccd>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff80270c59>] ? trace_hardirqs_on_caller+0x149/0x1b0 [<ffffffff80270ccd>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff80329afa>] compat_sys_ioctl+0x8a/0x3c0 [<ffffffff806a700d>] ? trace_hardirqs_off_thunk+0x3a/0x3c [<ffffffff8022f816>] sysenter_dispatch+0x7/0x2c [<ffffffff806a6fce>] ? trace_hardirqs_on_thunk+0x3a/0x3f Mem-Info: Node 0 DMA per-cpu: CPU 0: hi: 0, btch: 1 usd: 0 CPU 1: hi: 0, btch: 1 usd: 0 Node 0 DMA32 per-cpu: CPU 0: hi: 186, btch: 31 usd: 3 CPU 1: hi: 186, btch: 31 usd: 0 Node 0 Normal per-cpu: CPU 0: hi: 186, btch: 31 usd: 23 CPU 1: hi: 186, btch: 31 usd: 179 Active:78545 inactive:48683 dirty:31 writeback:0 unstable:2 free:830202 slab:17516 mapped:17473 pagetables:3496 bounce:0 Node 0 DMA free:36kB min:28kB low:32kB high:40kB active:0kB inactive:0kB present:15156kB pages_scanned:0 all_unreclaimable? no lowmem_reserve[]: 0 3207 3956 3956 Node 0 DMA32 free:3197192kB min:6512kB low:8140kB high:9768kB active:0kB inactive:0kB present:3284896kB pages_scanned:0 all_unreclaimable? no lowmem_reserve[]: 0 0 748 748 Node 0 Normal free:123580kB min:1516kB low:1892kB high:2272kB active:314180kB inactive:194732kB present:766464kB pages_scanned:0 all_unreclaimable? no lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 1*4kB 0*8kB 0*16kB 1*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 36kB Node 0 DMA32: 4*4kB 3*8kB 2*16kB 3*32kB 4*64kB 5*128kB 3*256kB 5*512kB 4*1024kB 5*2048kB 776*4096kB = 3197224kB Node 0 Normal: 14*4kB 14*8kB 8*16kB 6*32kB 1*64kB 3*128kB 3*256kB 2*512kB 4*1024kB 1*2048kB 28*4096kB = 123560kB 64847 total pagecache pages 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 502752kB Total swap = 502752kB 1048576 pages RAM 52120 pages reserved 71967 pages shared 143004 pages non-shared --- [2] BUG: unable to handle kernel NULL pointer dereference at 00000000000002c8 IP: [<ffffffff8046c84c>] map_single+0x1c/0x280 PGD 10e54e067 PUD 10e595067 PMD 0 Oops: 0000 [1] PREEMPT SMP DEBUG_PAGEALLOC CPU 0 Modules linked in: kvm_intel kvm microcode uvcvideo compat_ioctl32 videodev v4l1_compat shpchp pci_hotplug Pid: 5895, comm: skype Not tainted 2.6.27-rc6-235c-debug #1 RIP: 0010:[<ffffffff8046c84c>] [<ffffffff8046c84c>] map_single+0x1c/0x280 RSP: 0018:ffff88010e78d988 EFLAGS: 00210296 RAX: 0000780000000000 RBX: 0000000000000000 RCX: 0000000000000002 RDX: 0000000000005000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88010e78d9e8 R08: 0000000000000000 R09: 0000000000000001 R10: ffff88010e78d698 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000000 R14: 0000000000005000 R15: ffff88012f1c9968 FS: 0000000000000000(0000) GS:ffffffff80a6cdc0(0063) knlGS:00000000f6355b90 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000000002c8 CR3: 000000010e57d000 CR4: 00000000000026e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process skype (pid: 5895, threadinfo ffff88010e78c000, task ffff88012b9cc460) Stack: 0000000200000000 0000000000005000 0000000000000000 0000000000000000 00000000000017b8 0000000000000000 ffff88010e78d9c8 0000000000000000 0000000000000002 0000000000000000 0000000000005000 ffff88012f1c9968 Call Trace: [<ffffffff8046cbb0>] swiotlb_map_single_attrs+0x60/0xf0 [<ffffffff8046cc4c>] swiotlb_map_single+0xc/0x10 [<ffffffff8046cdee>] swiotlb_alloc_coherent+0xfe/0x180 [<ffffffff80212731>] dma_alloc_coherent+0x281/0x310 [<ffffffff805621c0>] hcd_buffer_alloc+0x50/0x90 [<ffffffff805547fd>] usb_buffer_alloc+0x2d/0x40 [<ffffffffa0056763>] uvc_alloc_urb_buffers+0x53/0xf0 [uvcvideo] [<ffffffffa0056958>] uvc_init_video+0x158/0x3e0 [uvcvideo] [<ffffffffa0056c17>] uvc_video_enable+0x37/0x80 [uvcvideo] [<ffffffffa0055853>] uvc_v4l2_do_ioctl+0x723/0x1260 [uvcvideo] [<ffffffff8026dd61>] ? trace_hardirqs_off_caller+0x21/0xc0 [<ffffffff8026dd61>] ? trace_hardirqs_off_caller+0x21/0xc0 [<ffffffffa0032c9f>] video_usercopy+0x19f/0x390 [videodev] [<ffffffffa0055130>] ? uvc_v4l2_do_ioctl+0x0/0x1260 [uvcvideo] [<ffffffff8026d0ce>] ? put_lock_stats+0xe/0x30 [<ffffffffa0054dad>] uvc_v4l2_ioctl+0x4d/0x80 [uvcvideo] [<ffffffffa0045083>] native_ioctl+0x83/0x90 [compat_ioctl32] [<ffffffffa004534e>] v4l_compat_ioctl32+0x2be/0x1da4 [compat_ioctl32] [<ffffffff806aad21>] ? do_page_fault+0x3d1/0xae0 [<ffffffff80270ccd>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff80270c59>] ? trace_hardirqs_on_caller+0x149/0x1b0 [<ffffffff80270ccd>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff80329afa>] compat_sys_ioctl+0x8a/0x3c0 [<ffffffff806a700d>] ? trace_hardirqs_off_thunk+0x3a/0x3c [<ffffffff8022f816>] sysenter_dispatch+0x7/0x2c [<ffffffff806a6fce>] ? trace_hardirqs_on_thunk+0x3a/0x3f Code: 45 31 c0 48 89 e5 e8 a4 ff ff ff c9 c3 66 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 38 48 89 75 b0 48 89 55 a8 89 4d a4 <48> 8b 87 c8 02 00 00 48 85 c0 0f 84 1c 02 00 00 48 8b 58 08 48 RIP [<ffffffff8046c84c>] map_single+0x1c/0x280 RSP <ffff88010e78d988> CR2: 00000000000002c8 ---[ end trace 5d15baeeb7025a0e ]--- --- [3] ffffffff8046c830 <map_single>: map_single(): /store/kernel/linux/lib/swiotlb.c:291 ffffffff8046c830: 55 push %rbp ffffffff8046c831: 48 89 e5 mov %rsp,%rbp ffffffff8046c834: 41 57 push %r15 ffffffff8046c836: 41 56 push %r14 ffffffff8046c838: 41 55 push %r13 ffffffff8046c83a: 41 54 push %r12 ffffffff8046c83c: 53 push %rbx ffffffff8046c83d: 48 83 ec 38 sub $0x38,%rsp ffffffff8046c841: 48 89 75 b0 mov %rsi,-0x50(%rbp) ffffffff8046c845: 48 89 55 a8 mov %rdx,-0x58(%rbp) ffffffff8046c849: 89 4d a4 mov %ecx,-0x5c(%rbp) dma_get_seg_boundary(): /store/kernel/linux/include/linux/dma-mapping.h:80 ffffffff8046c84c: 48 8b 87 c8 02 00 00 mov 0x2c8(%rdi),%rax <---- --- [4] Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-09-10Merge branch 'core/xen' into x86/xenIngo Molnar3-21/+27
2008-09-10swiotlb: convert swiotlb to use is_buffer_dma_capable helper functionFUJITA Tomonori1-7/+8
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-10Merge commit 'v2.6.27-rc6' into x86/iommuIngo Molnar4-23/+28
2008-09-10Merge commit 'v2.6.27-rc6' into core/rcuIngo Molnar7-24/+61
2008-09-09lib: Correct printk %pF to work on all architecturesJames Bottomley1-10/+1
It was introduced by "vsprintf: add support for '%pS' and '%pF' pointer formats" in commit 0fe1ef24f7bd0020f29ffe287dfdb9ead33ca0b2. However, the current way its coded doesn't work on parisc64. For two reasons: 1) parisc isn't in the #ifdef and 2) parisc has a different format for function descriptors Make dereference_function_descriptor() more accommodating by allowing architecture overrides. I put the three overrides (for parisc64, ppc64 and ia64) in arch/kernel/module.c because that's where the kernel internal linker which knows how to deal with function descriptors sits. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Tony Luck <tony.luck@intel.com> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-09-08swiotlb: add is_swiotlb_buffer helper functionFUJITA Tomonori1-5/+9
This adds is_swiotlb_buffer() helper function to see whether a buffer belongs to the swiotlb buffer or not. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-08swiotlb: use unmap_single instead of swiotlb_unmap_single in swiotlb_free_coherentFUJITA Tomonori1-1/+1
We don't need any check in swiotlb_unmap_single here. unmap_single is appropriate. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-08swiotlb: use map_single instead of swiotlb_map_single in swiotlb_alloc_coherentFUJITA Tomonori1-5/+2
We always need swiotlb memory here so address_needs_mapping and swiotlb_force testings are irrelevant. map_single should be used here instead of swiotlb_map_single. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-08swiotlb: remove GFP_DMA hack in swiotlb_alloc_coherentFUJITA Tomonori1-7/+0
The callers are supposed to set up the gfp flags appropriately. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-05Merge branch 'core/debugobjects' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tipLinus Torvalds1-8/+23
* 'core/debugobjects' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: debugobjects: fix lockdep warning
2008-09-03powerpc: Work around gcc's -fno-omit-frame-pointer bugTony Breeds1-3/+3
This bug is causing random crashes (http://bugzilla.kernel.org/show_bug.cgi?id=11414). -fno-omit-frame-pointer is only needed on powerpc when -pg is also supplied, and there is a gcc bug that causes incorrect code generation on 32-bit powerpc when -fno-omit-frame-pointer is used---it uses stack locations below the stack pointer, which is not allowed by the ABI because those locations can and sometimes do get corrupted by an interrupt. This ensures that CONFIG_FRAME_POINTER is only selected by ftrace. When CONFIG_FTRACE is enabled we also pass -mno-sched-epilog to work around the gcc codegen bug. Patch based on work by: Andreas Schwab <schwab@suse.de> Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-09-01debugobjects: fix lockdep warningVegard Nossum1-8/+23
Daniel J. Blueman reported: > ======================================================= > [ INFO: possible circular locking dependency detected ] > 2.6.27-rc4-224c #1 > ------------------------------------------------------- > hald/4680 is trying to acquire lock: > (&n->list_lock){++..}, at: [<ffffffff802bfa26>] add_partial+0x26/0x80 > > but task is already holding lock: > (&obj_hash[i].lock){++..}, at: [<ffffffff8041cfdc>] > debug_object_free+0x5c/0x120 We fix it by moving the actual freeing to outside the lock (the lock now only protects the list). The pool lock is also promoted to irq-safe (suggested by Dan). It's necessary because free_pool is now called outside the irq disabled region. So we need to protect against an interrupt handler which calls debug_object_init(). [tglx@linutronix.de: added hlist_move_list helper to avoid looping through the list twice] Reported-by: Daniel J Blueman <daniel.blueman@gmail.com> Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-08-25Merge branch 'linus' into x86/xenIngo Molnar1-2/+1
Conflicts: arch/x86/kernel/paravirt.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-08-21kobject: Replace ALL occurrences of '/' with '!' instead of only the first one.Ingo Oeser1-2/+1
A recent patch from Kay Sievers <kay.sievers@vrfy.org> replaced the first occurrence of '/' with '!' as needed for block devices. Now do some cheap defensive coding and replace all of them to avoid future issues in this area. Signed-off-by: Ingo Oeser <ioe-lkml@rameria.de> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-08-20Merge branch 'linus' into x86/xenIngo Molnar7-26/+67
2008-10-09percpu counter: clean up percpu_counter_sum_and_set()Mingming Cao1-5/+3
percpu_counter_sum_and_set() and percpu_counter_sum() is the same except the former updates the global counter after accounting. Since we are taking the fbc->lock to calculate the precise value of the counter in percpu_counter_sum() anyway, it should simply set fbc->count too, as the percpu_counter_sum_and_set() does. This patch merges these two interfaces into one. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-08-18Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds1-0/+2
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: lmb: Fix reserved region handling in lmb_enforce_memory_limit(). sparc64: Fix cmdline_memory_size handling bugs. sparc64: Fix overshoot in nid_range().
2008-08-16Move sysctl check into debugging section and don't make it default yAndi Kleen1-0/+8
I noticed that sysctl_check.o was the largest object file in a allnoconfig build in kernel/*. 36243 0 0 36243 8d93 kernel/sysctl_check.o This is because it was default y and && EMBEDDED. But I don't really see a need for a non kernel developer to have their sysctls checked all the time. So move the Kconfig into the kernel debugging section and also drop the default y and the EMBEDDED check. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-15lmb: Fix reserved region handling in lmb_enforce_memory_limit().David S. Miller1-0/+2
The idea of the implementation of this fix is from Michael Ellerman. This function has two loops, but they each interpret the memory_limit value differently. The first loop interprets it as a "size limit" whereas the second loop interprets it as an "address limit". Before the second loop runs, reset memory_limit to lmb_end_of_DRAM() so that it all works out. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Michael Ellerman <michael@ellerman.id.au>
2008-08-12docsrc: build Documentation/ sourcesRandy Dunlap1-0/+9
Currently source files in the Documentation/ sub-dir can easily bit-rot since they are not generally buildable, either because they are hidden in text files or because there are no Makefile rules for them. This needs to be fixed so that the source files remain usable and good examples of code instead of bad examples. Add the ability to build source files that are in the Documentation/ dir. Add to Kconfig as "BUILD_DOCSRC" config symbol. Use "CONFIG_BUILD_DOCSRC=1 make ..." to build objects from the Documentation/ sources. Or enable BUILD_DOCSRC in the *config system. However, this symbol depends on HEADERS_CHECK since the header files need to be installed (for userspace builds). Built (using cross-tools) for x86-64, i386, alpha, ia64, sparc32, sparc64, powerpc, sh, m68k, & mips. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-12seq_file: add seq_cpumask(), seq_nodemask()Alexey Dobriyan1-0/+11
Short enough reads from /proc/irq/*/smp_affinity return -EINVAL for no good reason. This became noticed with NR_CPUS=4096 patches, when length of printed representation of cpumask becase 1152, but cat(1) continued to read with 1024-byte chunks. bitmap_scnprintf() in good faith fills buffer, returns 1023, check returns -EINVAL. Fix it by switching to seq_file, so handler will just fill buffer and doesn't care about offsets, length, filling EOF and all this crap. For that add seq_bitmap(), and wrappers around it -- seq_cpumask() and seq_nodemask(). Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Reviewed-by: Paul Jackson <pj@sgi.com> Cc: Mike Travis <travis@sgi.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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