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2008-03-04dmaengine: add driver for Freescale MPC85xx DMA controllerZhang Wei
The driver implements DMA engine API for Freescale MPC85xx DMA controller, which could be used by devices in the silicon. The driver supports the Basic mode of Freescale MPC85xx DMA controller. The MPC85xx processors supported include MPC8540/60, MPC8555, MPC8548, MPC8641 and so on. The MPC83xx(MPC8349, MPC8360) are also supported. [kamalesh@linux.vnet.ibm.com: build fix] [dan.j.williams@intel.com: merge mm fixes, rebase on async_tx-2.6.25] Signed-off-by: Zhang Wei <wei.zhang@freescale.com> Signed-off-by: Ebony Zhu <ebony.zhu@freescale.com> Acked-by: Kumar Gala <galak@gate.crashing.org> Cc: Shannon Nelson <shannon.nelson@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2008-03-03Merge branch 'slab-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/christoph/vm * 'slab-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/christoph/vm: slub: fix possible NULL pointer dereference slub: Add kmalloc_large_node() to support kmalloc_node fallback slub: look up object from the freelist once slub: Fix up comments slub: Rearrange #ifdef CONFIG_SLUB_DEBUG in calculate_sizes() slub: Remove BUG_ON() from ksize and omit checks for !SLUB_DEBUG slub: Use the objsize from the kmem_cache_cpu structure slub: Remove useless checks in alloc_debug_processing slub: Remove objsize check in kmem_cache_flags() slub: rename slab_objects to show_slab_objects Revert "unique end pointer" patch slab: avoid double initialization & do initialization in 1 place
2008-03-03exit_notify: fix kill_orphaned_pgrp() usage with mt exitOleg Nesterov
1. exit_notify() always calls kill_orphaned_pgrp(). This is wrong, we should do this only when the whole process exits. 2. exit_notify() uses "current" as "ignored_task", obviously wrong. Use ->group_leader instead. Test case: void hup(int sig) { printf("HUP received\n"); } void *tfunc(void *arg) { sleep(2); printf("sub-thread exited\n"); return NULL; } int main(int argc, char *argv[]) { if (!fork()) { signal(SIGHUP, hup); kill(getpid(), SIGSTOP); exit(0); } pthread_t thr; pthread_create(&thr, NULL, tfunc, NULL); sleep(1); printf("main thread exited\n"); syscall(__NR_exit, 0); return 0; } output: main thread exited HUP received Hangup With this patch the output is: main thread exited sub-thread exited HUP received Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-03will_become_orphaned_pgrp: partially fix insufficient ->exit_state checkOleg Nesterov
p->exit_state != 0 doesn't mean this process is dead, it may have sub-threads. Change the code to use "p->exit_state && thread_group_empty(p)" instead. Without this patch, ^Z doesn't deliver SIGTSTP to the foreground process if the main thread has exited. However, the new check is not perfect either. There is a window when exit_notify() drops tasklist and before release_task(). Suppose that the last (non-leader) thread exits. This means that entire group exits, but thread_group_empty() is not true yet. As Eric pointed out, is_global_init() is wrong as well, but I did not dare to do other changes. Just for the record, has_stopped_jobs() is absolutely wrong too. But we can't fix it now, we should first fix SIGNAL_STOP_STOPPED issues. Even with this patch ^Z doesn't play well with the dead main thread. The task is stopped correctly but do_wait(WSTOPPED) won't see it. This is another unrelated issue, will be (hopefully) fixed separately. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-03introduce kill_orphaned_pgrp() helperOleg Nesterov
Factor out the common code in reparent_thread() and exit_notify(). No functional changes. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-03Fix default compose table initializationSamuel Thibault
Oddly enough, unsigned int c = '\300'; puts a "negative" value in c, not 0300... This fixes the default unicode compose table by using integers instead of character constants. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-03slub: fix possible NULL pointer dereferenceCyrill Gorcunov
This patch fix possible NULL pointer dereference if kzalloc failed. To be able to return proper error code the function return type is changed to ssize_t (according to callees and sysfs definitions). Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-03-03slub: Add kmalloc_large_node() to support kmalloc_node fallbackChristoph Lameter
Slub is missing some NUMA support for large kmallocs. Provide that. Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-03-03slub: look up object from the freelist oncePekka J Enberg
We only need to look up object from c->page->freelist once in __slab_alloc(). Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-03-03slub: Fix up commentsChristoph Lameter
Provide comments and fix up various spelling / style issues. Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-03-03slub: Rearrange #ifdef CONFIG_SLUB_DEBUG in calculate_sizes()Christoph Lameter
Group SLUB_DEBUG code together to reduce the number of #ifdefs. Move some debug checks under the #ifdef. Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-03-03slub: Remove BUG_ON() from ksize and omit checks for !SLUB_DEBUGChristoph Lameter
The BUG_ONs are useless since the pointer derefs will lead to NULL deref errors anyways. Some of the checks are not necessary if no debugging is possible. Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-03-03slub: Use the objsize from the kmem_cache_cpu structureChristoph Lameter
No need to access the kmem_cache structure. We have the same value in kmem_cache_cpu. Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-03-03slub: Remove useless checks in alloc_debug_processingChristoph Lameter
Alloc debug processing is never called with a NULL object pointer. No reason to check for NULL. Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-03-03slub: Remove objsize check in kmem_cache_flags()Christoph Lameter
There is no page->offset anymore and also no associated limit on the number of objects. The page->offset field was removed for 2.6.24. So the check in kmem_cache_flags() is now also obsolete (should have been dropped earlier, somehow a hunk vanished). Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-by: Christoph Lameter <clameter@sgi.com>
2008-03-03slub: rename slab_objects to show_slab_objectsChristoph Lameter
The sysfs callback is better named show_slab_objects since it is always called from the xxx_show callbacks. We need the name for other purposes later. Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-03-03Revert "unique end pointer" patchChristoph Lameter
This only made sense for the alternate fastpath which was reverted last week. Mathieu is working on a new version that addresses the fastpath issues but that new code first needs to go through mm and it is not clear if we need the unique end pointers with his new scheme. Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-03-03Merge branch 'master' of ↵Christoph Lameter
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
2008-03-03Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] Fix freeing of page tables for ARM in free_pgd_slow
2008-03-03docbook: fix fusion source filesRandy Dunlap
Fix docbook problems in fusion source files. These cause the generated docbook to be incorrect. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-03docbook: fix kernel-api source filesRandy Dunlap
Fix docbook problems in kernel-api.tmpl. These cause the generated docbook to be incorrect. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-03docbook: fix usb source filesRandy Dunlap
Fix docbook problems in USB source files. These cause the generated docbook to be incorrect. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-03docbook: fix scsi source fileRandy Dunlap
Fix docbook problem in SCSI source files. These cause the generated docbook to be incorrect. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-03docbook: fix rapidio source filesRandy Dunlap
Fix docbook problems in rapidio source files. These cause the generated docbook to be incorrect. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-03docbook: fix filesystems.tmpl source filesRandy Dunlap
Fix docbook problems in filesystems.tmpl. These cause the generated docbook to be incorrect. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: x86: revert "x86: fix pmd_bad and pud_bad to support huge pages" x86: revert "x86: CPA: avoid split of alias mappings"
2008-03-03Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (24 commits) [POWERPC] Convert the cell IOMMU fixed mapping to 16M IOMMU pages [POWERPC] Allow for different IOMMU page sizes in cell IOMMU code [POWERPC] Cell IOMMU: n_pte_pages is in 4K page units, not IOMMU_PAGE_SIZE [POWERPC] Split setup of IOMMU stab and ptab, allocate dynamic/fixed ptabs separately [POWERPC] Move allocation of cell IOMMU pad page [POWERPC] Remove unused pte_offset variable [POWERPC] Use it_offset not pte_offset in cell IOMMU code [POWERPC] Clearup cell IOMMU fixed mapping terminology [POWERPC] enable hardware watchpoints on cell blades [POWERPC] move celleb DABRX definitions [POWERPC] OProfile: enable callgraph support for Cell [POWERPC] spufs: fix use time accounting on SPE-overcommit [POWERPC] spufs: serialize SLB invalidation against SLB loading [POWERPC] spufs: invalidate SLB translation before adding a new entry [POWERPC] spufs: synchronize IRQ when disabling [POWERPC] spufs: fix order of sputrace thread IDs [POWERPC] Xilinx: hwicap cleanup [POWERPC] 4xx: Use correct board info structure in cuboot wrappers [POWERPC] spufs: fix invalid scheduling of forgotten contexts [POWERPC] 44x: add missing define TARGET_4xx and TARGET_440GX to cuboot-taishan ...
2008-03-03Allow ARG_MAX execve string space even with a small stack limitLinus Torvalds
The new code that removed the limitation on the execve string size (which was historically 32 pages) replaced it with a much softer limit based on RLIMIT_STACK which is usually much larger than the traditional limit. See commit b6a2fea39318e43fee84fa7b0b90d68bed92d2ba ("mm: variable length argument support") for details. However, if you have a small stack limit (perhaps because you need lots of stacks in a threaded environment), the new heuristic of allowing up to 1/4th of RLIMIT_STACK to be used for argument and environment strings could actually be smaller than the old limit. So just say that it's ok to have up to ARG_MAX strings regardless of the value of RLIMIT_STACK, and check the rlimit only when going over that traditional limit. (Of course, if you actually have a *really* small stack limit, the whole stack itself will be limited before you hit ARG_MAX, but that has always been true and is clearly the right behaviour anyway). Acked-by: Carlos O'Donell <carlos@codesourcery.com> Cc: Michael Kerrisk <michael.kerrisk@googlemail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ollie Wild <aaw@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-03Revert "x86: fix pmd_bad and pud_bad to support huge pages"Linus Torvalds
This reverts commit cded932b75ab0a5f9181ee3da34a0a488d1a14fd. Arjan bisected down a boot-time hang to this, saying: ".. it prevents the kernel to finish booting on my (Penryn based) laptop. The boot stops right after freeing the init memory." and while it's not clear exactly what triggers it, at this stage we're better off just reverting it while Ingo tries to figure out what went wrong. Requested-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Hans Rosenfeld <hans.rosenfeld@amd.com> Cc: Nish Aravamudan <nish.aravamudan@gmail.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-03x86: revert "x86: fix pmd_bad and pud_bad to support huge pages"Ingo Molnar
revert commit cded932b75ab0a5f9181ee3da34a0a488d1a14fd, "x86: fix pmd_bad and pud_bad to support huge pages", it causes a bootup hang, as reported and bisected by Arjan van de Ven. Bisected-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-03x86: revert "x86: CPA: avoid split of alias mappings"Rafael J. Wysocki
Revert: commit 8be8f54bae3453588011cad06363813a5293af53 Author: Thomas Gleixner <tglx@linutronix.de> Date: Sat Feb 23 20:43:21 2008 +0100 x86: CPA: avoid split of alias mappings because it clearly mishandles the case when __change_page_attr(), called from __change_page_attr_set_clr(), changes cpa->processed to 1 and cpa_process_alias(cpa) is executed right after that. This crashes my x86-64 test box early in the boot process (ref. http://bugzilla.kernel.org/show_bug.cgi?id=10140#c4). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-03-03Merge branch 'for-2.6.25' of ↵Paul Mackerras
master.kernel.org:/pub/scm/linux/kernel/git/arnd/cell-2.6 into merge
2008-03-03[POWERPC] Convert the cell IOMMU fixed mapping to 16M IOMMU pagesMichael Ellerman
The only tricky part is we need to adjust the PTE insertion loop to cater for holes in the page table. The PTEs for each segment start on a 4K boundary, so with 16M pages we have 16 PTEs per segment and then a gap to the next 4K page boundary. It might be possible to allocate the PTEs for each segment separately, saving the memory currently filling the gaps. However we'd need to check that's OK with the hardware, and that it actually saves memory. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2008-03-03[POWERPC] Allow for different IOMMU page sizes in cell IOMMU codeMichael Ellerman
Make some preliminary changes to cell_iommu_alloc_ptab() to allow it to take the page size as a parameter rather than assuming IOMMU_PAGE_SIZE. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2008-03-03[POWERPC] Cell IOMMU: n_pte_pages is in 4K page units, not IOMMU_PAGE_SIZEMichael Ellerman
We use n_pte_pages to calculate the stride through the page tables, but we also use it to set the NPPT value in the segment table entry. That is defined as the number of 4K pages per segment, so we should calculate it as such regardless of the IOMMU page size. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2008-03-03[POWERPC] Split setup of IOMMU stab and ptab, allocate dynamic/fixed ptabs ↵Michael Ellerman
separately Currently the cell IOMMU code allocates the entire IOMMU page table in a contiguous chunk. This is nice and tidy, but for machines with larger amounts of RAM the page table allocation can fail due to it simply being too large. So split the segment table and page table setup routine, and arrange to have the dynamic and fixed page tables allocated separately. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2008-03-03[POWERPC] Move allocation of cell IOMMU pad pageMichael Ellerman
There's no need to allocate the pad page unless we're going to actually use it - so move the allocation to where we know we're going to use it. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2008-03-03[POWERPC] Remove unused pte_offset variableMichael Ellerman
The cell IOMMU code no longer needs to save the pte_offset variable separately, it is incorporated into tbl->it_offset. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2008-03-03[POWERPC] Use it_offset not pte_offset in cell IOMMU codeMichael Ellerman
The cell IOMMU tce build and free routines use pte_offset to convert the index passed from the generic IOMMU code into a page table offset. This takes into account the SPIDER_DMA_OFFSET which sets the top bit of every DMA address. However it doesn't cater for the IOMMU window starting at a non-zero address, as the base of the window is not incorporated into pte_offset at all. As it turns out tbl->it_offset already contains the value we need, it takes into account the base of the window and also pte_offset. So use it instead! Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2008-03-03[POWERPC] Clearup cell IOMMU fixed mapping terminologyMichael Ellerman
It's called the fixed mapping, not the static mapping. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2008-03-03[POWERPC] enable hardware watchpoints on cell bladesJens Osterkamp
Ulrich Weigand has found that the hardware watchpoints on cell were not working back in November : http://ozlabs.org/pipermail/linuxppc-dev/2007-November/046135.html This patch sets them during initialization. Signed-off-by: Jens Osterkamp <jens@de.ibm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2008-03-03[POWERPC] move celleb DABRX definitionsJens Osterkamp
This moves the private DABRX definitions for celleb from beat.h to reg.h to make them usable for all. Signed-off-by: Jens Osterkamp <jens@de.ibm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2008-03-03[POWERPC] OProfile: enable callgraph support for CellBob Nelson
This patch enables OProfile callgraph support for the Cell processor. The original code was just calling a function to add the PC value, now it will call a function that first checks the callgraph depth. Callgraph is already enabled on the other Power platforms. Signed-off-by: Bob Nelson <rrnelson@us.ibm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2008-03-03Merge branch 'master' of ↵Paul Mackerras
git://git.kernel.org/pub/scm/linux/kernel/git/jk/spufs into merge
2008-03-03Merge branch 'for-2.6.25' of ↵Paul Mackerras
master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx into merge
2008-03-02Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: firewire: fix crash in automatic module unloading firewire: potentially invalid pointers used in fw_card_bm_work firewire: fw-sbp2: better fix for NULL pointer dereference in scsi_remove_device
2008-03-02firewire: fix crash in automatic module unloadingStefan Richter
"modprobe firewire-ohci; sleep .1; modprobe -r firewire-ohci" used to result in crashes like this: BUG: unable to handle kernel paging request at ffffffff8807b455 IP: [<ffffffff8807b455>] PGD 203067 PUD 207063 PMD 7c170067 PTE 0 Oops: 0010 [1] PREEMPT SMP CPU 0 Modules linked in: i915 drm cpufreq_ondemand acpi_cpufreq freq_table applesmc input_polldev led_class coretemp hwmon eeprom snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss button thermal processor sg snd_hda_intel snd_pcm snd_timer snd snd_page_alloc sky2 i2c_i801 rtc [last unloaded: crc_itu_t] Pid: 9, comm: events/0 Not tainted 2.6.25-rc2 #3 RIP: 0010:[<ffffffff8807b455>] [<ffffffff8807b455>] RSP: 0018:ffff81007dcdde88 EFLAGS: 00010246 RAX: ffff81007dc95040 RBX: ffff81007dee5390 RCX: 0000000000005e13 RDX: 0000000000008c8b RSI: 0000000000000001 RDI: ffff81007dee5388 RBP: ffff81007dc5eb40 R08: 0000000000000002 R09: ffffffff8022d05c R10: ffffffff8023b34c R11: ffffffff8041a353 R12: ffff81007dee5388 R13: ffffffff8807b455 R14: ffffffff80593bc0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffffffff8055a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: ffffffff8807b455 CR3: 0000000000201000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process events/0 (pid: 9, threadinfo ffff81007dcdc000, task ffff81007dc95040) Stack: ffffffff8023b396 ffffffff88082524 0000000000000000 ffffffff8807d9ae ffff81007dc5eb40 ffff81007dc9dce0 ffff81007dc5eb40 ffff81007dc5eb80 ffff81007dc9dce0 ffffffffffffffff ffffffff8023be87 0000000000000000 Call Trace: [<ffffffff8023b396>] ? run_workqueue+0xdf/0x1df [<ffffffff8023be87>] ? worker_thread+0xd8/0xe3 [<ffffffff8023e917>] ? autoremove_wake_function+0x0/0x2e [<ffffffff8023bdaf>] ? worker_thread+0x0/0xe3 [<ffffffff8023e813>] ? kthread+0x47/0x74 [<ffffffff804198e0>] ? trace_hardirqs_on_thunk+0x35/0x3a [<ffffffff8020c008>] ? child_rip+0xa/0x12 [<ffffffff8020b6e3>] ? restore_args+0x0/0x3d [<ffffffff8023e68a>] ? kthreadd+0x14c/0x171 [<ffffffff8023e68a>] ? kthreadd+0x14c/0x171 [<ffffffff8023e7cc>] ? kthread+0x0/0x74 [<ffffffff8020bffe>] ? child_rip+0x0/0x12 Code: Bad RIP value. RIP [<ffffffff8807b455>] RSP <ffff81007dcdde88> CR2: ffffffff8807b455 ---[ end trace c7366c6657fe5bed ]--- Note that this crash happened _after_ firewire-core was unloaded. The shared workqueue tried to run firewire-core's device initialization jobs or similar jobs. The fix makes sure that firewire-ohci and hence firewire-core is not unloaded before all device shutdown jobs have been completed. This is determined by the count of device initializations minus device releases. Also skip useless retries in the node initialization job if the node is to be shut down. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
2008-03-02firewire: potentially invalid pointers used in fw_card_bm_workStefan Richter
The bus management workqueue job was in danger to dereference NULL pointers. Also, after having temporarily lifted card->lock, a few node pointers and a device pointer may have become invalid. Add NULL pointer checks and get the necessary references. Also, move card->local_node out of fw_card_bm_work's sight during shutdown of the card. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
2008-03-02firewire: fw-sbp2: better fix for NULL pointer dereference in scsi_remove_deviceStefan Richter
Patch "firewire: fw-sbp2: fix NULL pointer deref. in scsi_remove_device" had the unintended effect that firewire-sbp2 could not be unloaded anymore until all SBP-2 devices were unplugged. We now fix the NULL pointer bug by reacquiring a reference to the sdev instead of holding a reference to the sdev (and to the module) all the time. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Tested-by: Jarod Wilson <jwilson@redhat.com>
2008-03-01[ARM] Fix freeing of page tables for ARM in free_pgd_slowUwe Kleine-König
Since 2f569af (CONFIG_HIGHPTE vs. sub-page page tables.) pte_free() calls pte_lock_deinit() and dec_zone_page_state(). So free_pgd_slow must not call the latter two when calling the first. Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>