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* lib/idr.c: Fix bug introduced by RCU fixManfred Spraul2008-12-101-1/+7
| | | | | | | | | | | | | | | | | | The last patch to lib/idr.c caused a bug if idr_get_new_above() was called on an empty idr. Usually, nodes stay on the same layer. New layers are added to the top of the tree. The exception is idr_get_new_above() on an empty tree: In this case, the new root node is first added on layer 0, then moved upwards. p->layer was not updated. As usual: You shall never rely on the source code comments, they will only mislead you. Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* revert "percpu_counter: new function percpu_counter_sum_and_set"Andrew Morton2008-12-101-6/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Revert commit e8ced39d5e8911c662d4d69a342b9d053eaaac4e Author: Mingming Cao <cmm@us.ibm.com> Date: Fri Jul 11 19:27:31 2008 -0400 percpu_counter: new function percpu_counter_sum_and_set As described in revert "percpu counter: clean up percpu_counter_sum_and_set()" the new percpu_counter_sum_and_set() is racy against updates to the cpu-local accumulators on other CPUs. Revert that change. This means that ext4 will be slow again. But correct. Reported-by: Eric Dumazet <dada1@cosmosbay.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mingming Cao <cmm@us.ibm.com> Cc: <linux-ext4@vger.kernel.org> Cc: <stable@kernel.org> [2.6.27.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* revert "percpu counter: clean up percpu_counter_sum_and_set()"Andrew Morton2008-12-101-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Revert commit 1f7c14c62ce63805f9574664a6c6de3633d4a354 Author: Mingming Cao <cmm@us.ibm.com> Date: Thu Oct 9 12:50:59 2008 -0400 percpu counter: clean up percpu_counter_sum_and_set() Before this patch we had the following: percpu_counter_sum(): return the percpu_counter's value percpu_counter_sum_and_set(): return the percpu_counter's value, copying that value into the central value and zeroing the per-cpu counters before returning. After this patch, percpu_counter_sum_and_set() has gone, and percpu_counter_sum() gets the old percpu_counter_sum_and_set() functionality. Problem is, as Eric points out, the old percpu_counter_sum_and_set() functionality was racy and wrong. It zeroes out counters on "other" cpus, without holding any locks which will prevent races agaist updates from those other CPUS. This patch reverts 1f7c14c62ce63805f9574664a6c6de3633d4a354. This means that percpu_counter_sum_and_set() still has the race, but percpu_counter_sum() does not. Note that this is not a simple revert - ext4 has since started using percpu_counter_sum() for its dirty_blocks counter as well. Note that this revert patch changes percpu_counter_sum() semantics. Before the patch, a call to percpu_counter_sum() will bring the counter's central counter mostly up-to-date, so a following percpu_counter_read() will return a close value. After this patch, a call to percpu_counter_sum() will leave the counter's central accumulator unaltered, so a subsequent call to percpu_counter_read() can now return a significantly inaccurate result. If there is any code in the tree which was introduced after e8ced39d5e8911c662d4d69a342b9d053eaaac4e was merged, and which depends upon the new percpu_counter_sum() semantics, that code will break. Reported-by: Eric Dumazet <dada1@cosmosbay.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mingming Cao <cmm@us.ibm.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* percpu_counter: fix CPU unplug race in percpu_counter_destroy()Eric Dumazet2008-12-101-2/+2
| | | | | | | | | | | | | We should first delete the counter from percpu_counters list before freeing memory, or a percpu_counter_hotcpu_callback() could dereference a NULL pointer. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Acked-by: David S. Miller <davem@davemloft.net> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* lib/idr.c: fix rcu related race with idr_findManfred Spraul2008-12-021-2/+12
| | | | | | | | | | | | | | | | | | | 2nd part of the fixes needed for http://bugzilla.kernel.org/show_bug.cgi?id=11796. When the idr tree is either grown or shrunk, then the update to the number of layers and the top pointer were not atomic. This race caused crashes. The attached patch fixes that by replicating the layers counter in each layer, thus idr_find doesn't need idp->layers anymore. Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Cc: Clement Calmels <cboulte@gmail.com> Cc: Nadia Derbey <Nadia.Derbey@bull.net> Cc: Pierre Peiffer <peifferp@gmail.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* lib/scatterlist.c: fix kunmap() argument in sg_miter_stop()Arjan van de Ven2008-11-201-1/+1
| | | | | | | | | | | | | | | | | kunmap() takes as argument the struct page that orginally got kmap()'d, however the sg_miter_stop() function passed it the kernel virtual address instead, resulting in weird stuff. Somehow I ended up fixing this bug by accident while looking for a bug in the same area. Reported-by: kerneloops.org Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: <stable@kernel.org> [2.6.27.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* swiotlb: use coherent_dma_mask in alloc_coherentFUJITA Tomonori2008-11-171-3/+7
| | | | | | | | | | | | | | | | | | | | | | | Impact: fix DMA buffer allocation coherency bug in certain configs This patch fixes swiotlb to use dev->coherent_dma_mask in swiotlb_alloc_coherent(). coherent_dma_mask is a subset of dma_mask (equal to it most of the time), enumerating the address range that a given device is able to DMA to/from in a cache-coherent way. But currently, swiotlb uses dev->dma_mask in alloc_coherent() implicitly via address_needs_mapping(), but alloc_coherent is really supposed to use coherent_dma_mask. This bug could break drivers that uses smaller coherent_dma_mask than dma_mask (though the current code works for the majority that use the same mask for coherent_dma_mask and dma_mask). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: tony.luck@intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* cpumask: introduce new API, without changing anything, v3Rusty Russell2008-11-091-1/+2
| | | | | | | | | | | | | Impact: cleanup Clean up based on feedback from Andrew Morton and others: - change to inline functions instead of macros - add __init to bootmem method - add a missing debug check Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* cpumask: new API, v2Rusty Russell2008-11-071-0/+5
| | | | | | | | - add cpumask_of() - add free_bootmem_cpumask_var() Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* cpumask: introduce new API, without changing anythingRusty Russell2008-11-061-0/+73
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: introduce new APIs We want to deprecate cpumasks on the stack, as we are headed for gynormous numbers of CPUs. Eventually, we want to head towards an undefined 'struct cpumask' so they can never be declared on stack. 1) New cpumask functions which take pointers instead of copies. (cpus_* -> cpumask_*) 2) Several new helpers to reduce requirements for temporary cpumasks (cpumask_first_and, cpumask_next_and, cpumask_any_and) 3) Helpers for declaring cpumasks on or offstack for large NR_CPUS (cpumask_var_t, alloc_cpumask_var and free_cpumask_var) 4) 'struct cpumask' for explicitness and to mark new-style code. 5) Make iterator functions stop at nr_cpu_ids (a runtime constant), not NR_CPUS for time efficiency and for smaller dynamic allocations in future. 6) cpumask_copy() so we can allocate less than a full cpumask eventually (for alloc_cpumask_var), and so we can eliminate the 'struct cpumask' definition eventually. 7) work_on_cpu() helper for doing task on a CPU, rather than saving old cpumask for current thread and manipulating it. 8) smp_call_function_many() which is smp_call_function_mask() except taking a cpumask pointer. Note that this patch simply introduces the new functions and leaves the obsolescent ones in place. This is to simplify the transition patches. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Driver core: fix 'dynamic_debug' cmd line parameterJason Baron2008-10-291-1/+3
| | | | | | | | | | | | | | In testing 2.6.28-rc1, I found that passing 'dynamic_printk' on the command line didn't activate the debug code. The problem is that dynamic_printk_setup() (which activates the debugging) is being called before dynamic_printk_init() is called (which initializes infrastructure). Fix this by setting setting the state to 'DYNAMIC_ENABLED_ALL' in dynamic_printk_setup(), which will also cause all subsequent modules to have debugging automatically started, which is probably the behavior we want. Signed-off-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Merge branch 'tracing-fixes-for-linus' of ↵Linus Torvalds2008-10-281-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (31 commits) ftrace: fix current_tracer error return tracing: fix a build error on alpha ftrace: use a real variable for ftrace_nop in x86 tracing/ftrace: make boot tracer select the sched_switch tracer tracepoint: check if the probe has been registered asm-generic: define DIE_OOPS in asm-generic trace: fix printk warning for u64 ftrace: warning in kernel/trace/ftrace.c ftrace: fix build failure ftrace, powerpc, sparc64, x86: remove notrace from arch ftrace file ftrace: remove ftrace hash ftrace: remove mcount set ftrace: remove daemon ftrace: disable dynamic ftrace for all archs that use daemon ftrace: add ftrace warn on to disable ftrace ftrace: only have ftrace_kill atomic ftrace: use probe_kernel ftrace: comment arch ftrace code ftrace: return error on failed modified text. ftrace: dynamic ftrace process only text section ...
| * Merge commit 'v2.6.28-rc2' into tracing/urgentIngo Molnar2008-10-272-15/+41
| |\
| * \ Merge branch 'tracing/ftrace' into tracing/urgentIngo Molnar2008-10-221-1/+1
| |\ \
| | * | ftrace: rename FTRACE to FUNCTION_TRACERSteven Rostedt2008-10-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Due to confusion between the ftrace infrastructure and the gcc profiling tracer "ftrace", this patch renames the config options from FTRACE to FUNCTION_TRACER. The other two names that are offspring from FTRACE DYNAMIC_FTRACE and FTRACE_MCOUNT_RECORD will stay the same. This patch was generated mostly by script, and partially by hand. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | Merge branch 'core-fixes-for-linus' of ↵Linus Torvalds2008-10-281-2/+4
|\ \ \ \ | |_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: lockdep: fix irqs on/off ip tracing lockdep: minor fix for debug_show_all_locks() x86: restore the old swiotlb alloc_coherent behavior x86: use GFP_DMA for 24bit coherent_dma_mask swiotlb: remove panic for alloc_coherent failure xen: compilation fix of drivers/xen/events.c on IA64 xen: portability clean up and some minor clean up for xencomm.c xen: don't reload cr3 on suspend kernel/resource: fix reserve_region_with_split() section mismatch printk: remove unused code from kernel/printk.c
| * | | swiotlb: remove panic for alloc_coherent failureFUJITA Tomonori2008-10-231-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | swiotlb_alloc_coherent calls panic() when allocated swiotlb pages is not fit for a device's dma mask. However, alloc_coherent failure is not a disaster at all. AFAIK, none of other x86 and IA64 IOMMU implementations don't crash in case of alloc_coherent failure. There are some drivers that don't check alloc_coherent failure but not many (about ten and I've already started to fix some of them). alloc_coherent returns NULL in case of failure so it's likely that these guilty drivers crash immediately. So swiotlb doesn't need to call panic() just for them. Reported-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds2008-10-231-15/+19
|\ \ \ \ | |/ / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (21 commits) [SCSI] sd: fix computation of the full size of the device [SCSI] lib: string_get_size(): don't hang on zero; no decimals on exact [SCSI] sun3x_esp: Convert && to || [SCSI] sd: remove command-size switching code [SCSI] 3w-9xxx: remove unnecessary local_irq_save/restore for scsi sg copy API [SCSI] 3w-xxxx: remove unnecessary local_irq_save/restore for scsi sg copy API [SCSI] fix netlink kernel-doc [SCSI] sd: Fix handling of NO_SENSE check condition [SCSI] export busy state via q->lld_busy_fn() [SCSI] refactor sdev/starget/shost busy checking [SCSI] mptfusion: Increase scsi-timeouts, similariy to the LSI 4.x driver. [SCSI] aic7xxx: Take the LED out of diagnostic mode on PM resume [SCSI] aic79xx: user visible misuse wrong SI units (not disk size!) [SCSI] ipr: use memory_read_from_buffer() [SCSI] aic79xx: fix shadowed variables [SCSI] aic79xx: fix shadowed variables, add statics [SCSI] aic7xxx: update *_shipped files [SCSI] aic7xxx: update .reg files [SCSI] aic7xxx: introduce "dont_generate_debug_code" keyword in aicasm parser [SCSI] scsi_dh: Initialize path state to be passive when path is not owned ...
| * | | [SCSI] lib: string_get_size(): don't hang on zero; no decimals on exactH. Peter Anvin2008-10-231-15/+19
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We would hang forever when passing a zero to string_get_size(). Furthermore, string_get_size() would produce decimals on a value small enough to be exact. Finally, a few formatting issues are inconsistent with standard SI style guidelines. - If the value is less than the divisor, skip the entire rounding step. This prints out all small values including zero as integers, without decimals. - Add a space between the value and the symbol for the unit, consistent with standard SI practice. - Lower case k in kB since we are talking about powers of 10. - Finally, change "int" to "unsigned int" in one place to shut up a gcc warning when compiling the code out-of-kernel for testing. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* | | Merge branch 'for-upstream' of ↵Linus Torvalds2008-10-231-0/+22
|\ \ \ | |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/dvrabel/uwb * 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/dvrabel/uwb: (47 commits) uwb: wrong sizeof argument in mac address compare uwb: don't use printk_ratelimit() so often uwb: use kcalloc where appropriate uwb: use time_after() when purging stale beacons uwb: add credits for the original developers of the UWB/WUSB/WLP subsystems uwb: add entries in the MAINTAINERS file uwb: depend on EXPERIMENTAL wusb: wusb-cbaf (CBA driver) sysfs ABI simplification uwb: document UWB and WUSB sysfs files uwb: add symlinks in sysfs between radio controllers and PALs uwb: dont tranmit identification IEs uwb: i1480/GUWA100U: fix firmware download issues uwb: i1480: remove MAC/PHY information checking function uwb: add Intel i1480 HWA to the UWB RC quirk table uwb: disable command/event filtering for D-Link DUB-1210 uwb: initialize the debug sub-system uwb: Fix handling IEs with empty IE data in uwb_est_get_size() wusb: fix bmRequestType for Abort RPipe request wusb: fix error path for wusb_set_dev_addr() wusb: add HWA host controller driver ...
| * | Merge branch 'master' into for-upstreamDavid Vrabel2008-10-2013-188/+861
| |\| | | | | | | | | | | | | | | | | | | Conflicts: Documentation/ABI/testing/sysfs-bus-usb drivers/Makefile
| * | bitmap: add bitmap_copy_le()David Vrabel2008-09-171-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | bitmap_copy_le() copies a bitmap, putting the bits into little-endian order (i.e., each unsigned long word in the bitmap is put into little-endian order). The UWB stack used bitmaps to manage Medium Access Slot availability, and these bitmaps need to be written to the hardware in LE order. Signed-off-by: David Vrabel <david.vrabel@csr.com>
* | | Implement %pR to print struct resource contentLinus Torvalds2008-10-201-6/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | Add a %pR option to the kernel vsnprintf that prints the range of addresses inside a struct resource passed by pointer. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | bitmask: remove bitmap_scnprintf_len()Lai Jiangshan2008-10-201-11/+0
| |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | bitmap_scnprintf_len() is not used now, so we remove it. Otherwise we have to maintain it and make its return value always equal to bitmap_scnprintf()'s return value. Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Paul Menage <menage@google.com> Cc: Paul Jackson <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | block: add BIG FAT WARNING to CONFIG_DEBUG_BLOCK_EXT_DEVTTejun Heo2008-10-171-0/+5
| | | | | | | | | | | | | | | | CONFIG_DEBUG_BLOCK_EXT_DEVT can break booting even on some modern distros. Add BIG FAT WARNING to keep people at a safe distance. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | lib: remove defining macros for strict_strto??Harvey Harrison2008-10-161-49/+68
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Open-code them rather than using defining macros. The function bodies are now next to their kerneldoc comments as a bonus. Add casts to the signed cases as they call into the unsigned versions. Avoids the sparse warnings: lib/vsprintf.c:249:1: warning: incorrect type in argument 3 (different signedness) lib/vsprintf.c:249:1: expected unsigned long *res lib/vsprintf.c:249:1: got long *res lib/vsprintf.c:249:1: warning: incorrect type in argument 3 (different signedness) lib/vsprintf.c:249:1: expected unsigned long *res lib/vsprintf.c:249:1: got long *res lib/vsprintf.c:251:1: warning: incorrect type in argument 3 (different signedness) lib/vsprintf.c:251:1: expected unsigned long long *res lib/vsprintf.c:251:1: got long long *res lib/vsprintf.c:251:1: warning: incorrect type in argument 3 (different signedness) lib/vsprintf.c:251:1: expected unsigned long long *res lib/vsprintf.c:251:1: got long long *res Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | lib: trivial whitespace tidyHarvey Harrison2008-10-161-17/+9
| | | | | | | | | | | | | | Remove extra lines before the EXPORT_SYMBOL()s Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | lib: pull base-guessing logic to helper functionHarvey Harrison2008-10-161-38/+42
| | | | | | | | | | | | | | | | | | | | | | The default base is 10 unless there is a leading zero, in which case the base will be guessed as 8. The base will only be guesed as 16 when the string starts with '0x' the third character is a valid hex digit. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds2008-10-164-15/+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. ...
| * | kobject: Cleanup kobject_rename and !CONFIG_SYSFSEric W. Biederman2008-10-161-2/+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>
| * | kobject: Fix kobject_rename and !CONFIG_SYSFSEric W. Biederman2008-10-161-13/+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>
| * | driver core: basic infrastructure for per-module dynamic debug messagesJason Baron2008-10-163-0/+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>
* | | introduce generic iommu_num_pages functionJoerg Roedel2008-10-161-0/+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>
* | | Add kerneldoc documentation for new printk format extensionsAndi Kleen2008-10-161-0/+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>
* | | Kconfig: eliminate "def_bool n" constructsJan Beulich2008-10-161-2/+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>
* | vfs: Use const for kernel parser tableSteven Whitehouse2008-10-131-1/+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>
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*-------. \ Merge branches 'x86/xen', 'x86/build', 'x86/microcode', 'x86/mm-debug-v2', ↵Ingo Molnar2008-10-122-1/+10
|\ \ \ \ \ \ | | | | |_|/ | | | |/| | | | | | | | 'x86/memory-corruption-check', 'x86/early-printk', 'x86/xsave', 'x86/ptrace-v2', 'x86/quirks', 'x86/setup', 'x86/spinlocks' and 'x86/signal' into x86/core-v2
| | | | * | MM: virtual address debugJiri Slaby2008-06-191-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add some (configurable) expensive sanity checking to catch wrong address translations on x86. - create linux/mmdebug.h file to be able include this file in asm headers to not get unsolvable loops in header files - __phys_addr on x86_32 became a function in ioremap.c since PAGE_OFFSET, is_vmalloc_addr and VMALLOC_* non-constasts are undefined if declared in page_32.h - add __phys_addr_const for initializing doublefault_tss.__cr3 Tested on 386, 386pae, x86_64 and x86_64 numa=fake=2. Contains Andi's enable numa virtual address debug patch. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | Merge branch 'linus' into x86/xenIngo Molnar2008-10-127-65/+208
| |\ \ \ \ \ | |/ / / / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/kernel/cpu/common.c arch/x86/kernel/process_64.c arch/x86/xen/enlighten.c
| * | | | | Merge branch 'timers/urgent' into x86/xenIngo Molnar2008-09-232-1/+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>
| * | | | | Merge branch 'core/xen' into x86/xenIngo Molnar2008-09-103-21/+27
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| * \ \ \ \ \ Merge branch 'linus' into x86/xenIngo Molnar2008-08-251-2/+1
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/kernel/paravirt.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * \ \ \ \ \ \ Merge branch 'linus' into x86/xenIngo Molnar2008-08-207-26/+67
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| * \ \ \ \ \ \ \ Merge branch 'x86/urgent' into x86/xenIngo Molnar2008-07-311-8/+0
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| * \ \ \ \ \ \ \ \ Merge branch 'linus' into x86/xenIngo Molnar2008-07-313-5/+11
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| * | | | | | | | | | generic, memparse(): constify argumentJeremy Fitzhardinge2008-07-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | memparse()'s first argument can be const, so it should be. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | | | | | | | Merge branch 'for_linus' of ↵Linus Torvalds2008-10-111-5/+3
|\ \ \ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 * '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 ...
| * | | | | | | | | | | percpu counter: clean up percpu_counter_sum_and_set()Mingming Cao2008-10-091-5/+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>
* | | | | | | | | | | Merge phase #3 (IOMMU) of ↵Linus Torvalds2008-10-112-32/+22
|\ \ \ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * '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 ...
| * | | | | | | | | | | iommu: export iommu_area_reserve helper functionFUJITA Tomonori2008-09-221-3/+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>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 16:11:39 +0100