- 05 Feb, 2007 32 commits
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David S. Miller authored
Mirror the logic in the sun4u handler, we have to update both registers even when we branch out to window fault fixup handling. The way it works is that if we are in etrap processing a fault already, g4/g5 holds the original fault information. If we take a window spill fault while doing etrap, then we put the window spill fault info into g4/g5 and this is what the top-level fault handler ends up processing first. Then we retry the originally faulting instruction, and process the original fault at that time. This is all necessary because of how constrained the trap registers are in these code paths. These cases trigger very rarely, so even if there is some performance implication it's doesn't happen very often. In fact the rarity is why it took so long to trigger and find this particular bug. Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Chris Wright <chrisw@sous-sol.org>
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Mike Frysinger authored
rtc_sysfs_add_device is needed even after dev initialization, so drop __devinit. Signed-off-by:
Mike Frysinger <vapier@gentoo.org> Acked-by:
Alessandro Zummo <a.zummo@towertech.it> Cc: <stable@kernel.org> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Linus Torvalds authored
This reverts commit 99a10a60. As per Hugh Dickins: "Nadia Derbey has reported that mmap of /dev/kmem no longer works with the kernel virtual address as offset, and Franck has confirmed that his patch came from a misunderstanding of what an offset means to /dev/kmem - whereas his patch description seems to say that he was correcting the offset on a few plaforms, there was no such problem to correct, and his patch was in fact changing its API on all platforms." Suggested-by:
Hugh Dickins <hugh@veritas.com> Cc: Franck Bui-Huu <fbuihuu@gmail.com> Cc: Nadia Derbey <Nadia.Derbey@bull.net> Cc: Andi Kleen <ak@suse.de> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Andrew Morton <akpm@osdl.org> Signed-off-by:
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Linas Vepstas authored
A flag was recently added to the elevator code to avoid performing an unplug when reuests are being re-queued. The goal of this flag was to avoid a deep recursion that can occur when re-queueing requests after a SCSI device/host reset. See http://lkml.org/lkml/2006/5/17/254 However, that fix added the flag near the bottom of a case statement, where an earlier break (in an if statement) could transport one out of the case, without setting the flag. This patch sets the flag earlier in the case statement. I re-discovered the deep recursion recently during testing; I was told that it was a known problem, and the fix to it was in the kernel I was testing. Indeed it was ... but it didn't fix the bug. With the patch below, I no longer see the bug. Signed-off by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by:
Jens Axboe <axboe@suse.de> Signed-off-by:
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Patrick McHardy authored
With the introduction of x_tables we accidentally broke compatibility by defining IPT_TABLE_MAXNAMELEN to XT_FUNCTION_MAXNAMELEN instead of XT_TABLE_MAXNAMELEN, which is two bytes larger. On most architectures it doesn't really matter since we don't have any tables with names that long in the kernel and the structure layout didn't change because of alignment requirements of following members. On CRIS however (and other architectures that don't align data) this changed the structure layout and thus broke compatibility with old iptables binaries. Changing it back will break compatibility with binaries compiled against recent kernels again, but since the breakage has only been there for three releases this seems like the better choice. Spotted by Jonas Berlin <xkr47@outerspace.dyndns.org>. Signed-off-by:
Patrick McHardy <kaber@trash.net> Signed-off-by:
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Andi Kleen authored
The new PDA code uses a dummy _proxy_pda variable to describe memory references to the PDA. It is never referenced in inline assembly, but exists as input/output arguments. gcc 4.2 in some cases can CSE references to this which causes unresolved symbols. Define it to zero to avoid this. Signed-off-by:
Andi Kleen <ak@suse.de> Signed-off-by:
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Ingo Molnar authored
recently cpufreq support on my laptop (Lenovo T60) broke completely: when it's plugged into AC it would never go higher than 1 GHz - neither 1.3 GHz nor 1.83 GHz is possible - no matter which governor (userspace, speed or ondemand) is used. after some cpufreq debugging i tracked the regression back to the following (totally correct) bug-fix commit: commit 0916bd3e Author: Dave Jones <davej@redhat.com> Date: Wed Nov 22 20:42:01 2006 -0500 [PATCH] Correct bound checking from the value returned from _PPC method. this bugfix, which makes other laptops work, made a previously hidden (BIOS) bug visible on my laptop. The bug is the following: if the _PPC (Performance Present Capabilities) optional ACPI object is queried /after/ bootup then the BIOS reports an incorrect value of '2'. My laptop (Lenovo T60) has the following performance states supported: 0: 1833000 1: 1333000 2: 1000000 Per ACPI specification, a _PPC value of '0' means that all 3 performance states are usable. A _PPC value of '1' means states 1 .. 2 are usable, a value of '2' means only state '2' (slowest) is usable. now, the _PPC object is optional, and it also comes with notification. Furthermore, when a CPU object is initialized, the _PPC object is initialized as well. So the following evaluation of the _PPC object is superfluous: [<c028ba5f>] acpi_processor_get_platform_limit+0xa1/0xaf [<c028c040>] acpi_processor_register_performance+0x3b9/0x3ef [<c0111a85>] acpi_cpufreq_cpu_init+0xb7/0x596 [<c03dab74>] cpufreq_add_dev+0x160/0x4a8 [<c02bed90>] sysdev_driver_register+0x5a/0xa0 [<c03d9c4c>] cpufreq_register_driver+0xb4/0x176 [<c068ac08>] acpi_cpufreq_init+0xe5/0xeb [<c010056e>] init+0x14f/0x3dd and this is the point where my laptop's BIOS returns the incorrect value of '2'. Note that it has not sent any notification event, so the value is probably not really intentional (possibly spurious), and Windows likely doesnt query it after bootup either. Maybe the value is kept at '2' normally, and is only set to the real value when a true asynchronous event (such as AC plug event, battery switch, etc.) occurs. So i /think/ this is a grey area of the ACPI spec: per the letter of the spec the _PPC value only changes when notified, so there's no reason to query it after the system has booted up. So in my opinion the best (and most compatible) strategy would be to do the change below, and to not evaluate the _PPC object in the acpi_processor_get_performance_info() call, but only evaluate it if _PPC is present during CPU object init, or if it's notified during an asynchronous event. This change is more permissive than the previous logic, so it definitely shouldnt break any existing system. This also happens to fix my laptop, which is merrily chugging along at 1.83 GHz now. Yay! Signed-off-by:
Ingo Molnar <mingo@elte.hu> Cc: Dave Jones <davej@redhat.com> Acked-by:
Len Brown <len.brown@intel.com> Signed-off-by:
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Jeff Dike authored
This fixes UML on hosts with non-standard VM splits. We had changed the config variable that controls UML behavior on such hosts, but not propogated the change everywhere. In particular, the values of STUB_CODE and STUB_DATA relied on the old variable. I also reformatted the HOST_VMSPLIT_3G help to make it more standard. Spotted by uml@flonatel.org. Signed-off-by:
Jeff Dike <jdike@addtoit.com> Signed-off-by:
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Erez Zilber authored
iSER limits the number of outstanding PDUs to send. When this threshold is reached, it should return an error code (-ENOBUFS) instead of setting the suspend_tx bit (which should be used only by libiscsi). Without this fix, during logout, open-iscsi over iSER tries to logout forever. Signed-off-by:
Erez Zilber <erezz@voltaire.com> Signed-off-by:
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Paul Moore authored
In the case where a user has configured NetLabel in the kernel but is not using a SELinux policy with the MLS/MCS feature enabled there is a bug in mls_export_cat() where a NULL pointer is used. The initial problem report and discussion can be found here (this patch has been ACK'd by Stephen Smalley and James Morris in the discussion thread below): * http://marc2.theaimsgroup.com/?t=116920302500004&r=1&w=2 This patch is specific to the 2.6.19.y kernel series as the mls_export_cat() function has been replaced in the 2.6.20 kernel. Signed-off-by:
Paul Moore <paul.moore@hp.com> Acked-by:
Stephen Smalley <sds@tycho.nsa.gov> Acked-by:
James Morris <jmorris@namei.org> Signed-off-by:
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Takashi Iwai authored
Fix NULL dereference in hda_generic.c. Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
Jaroslav Kysela <perex@suse.cz> Signed-off-by:
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Herbert Xu authored
The recent hashing introduced an off-by-one bug in policy list insertion. Instead of adding after the last entry with a lesser or equal priority, we're adding after the successor of that entry. This patch fixes this and also adds a warning if we detect a duplicate entry in the policy list. This should never happen due to this if clause. Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Patrick McHardy authored
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Pablo Neira Ayuso authored
Check that status flags are available in the netlink message received to create a new conntrack. Fixes a crash in ctnetlink_create_conntrack when the CTA_STATUS attribute is not present. Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
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YOSHIFUJI Hideaki authored
Join all-node multicast group after assignment of dev->ip6_ptr because it must be assigned when ipv6_dev_mc_inc() is called. This fixes Bug#7817, reported by <gernoth@informatik.uni-erlangen.de>. Closes: 7817 Signed-off-by:
YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by:
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Ard van Breemen authored
The pci_find_subsys gets called very early by obsolete ide setup parameters. This is a bogus call since pci is not initialized yet, so the list is empty. But in the mean time, interrupts get enabled by down_read. This can result in a kernel panic when the irq controller gets initialized. This patch checks if the device list is empty before taking the semaphore, and hence will not enable irq's. Furthermore it will inform that it is called while pci_devices is empty as a reminder that the ide code needs to be fixed. The pci_get_subsys can get called in the same manner, and as such is patched in the same manner. [akpm@osdl.org: cleanups] Signed-off-by:
Ard van Breemen <ard@telegraafnet.nl> Cc: Greg KH <greg@kroah.com> Signed-off-by:
Linus Torvalds <torvalds@osdl.org> [chrisw: fold in 6a4c24ec to avoid printk spamming] Signed-off-by:
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Ard van Breemen authored
The calls made by parse_parms to other initialization code might enable interrupts again way too early. Having interrupts on this early can make systems PANIC when they initialize the IRQ controllers (which happens later in the code). This patch detects that irq's are enabled again, barfs about it and disables them again as a safety net. [akpm@osdl.org: cleanups] Signed-off-by:
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Linus Torvalds authored
Fix up CIFS for "test_clear_page_dirty()" removal This also adds he required page "writeback" flag handling, that cifs hasn't been doing and that the page dirty flag changes made obvious. Acked-by:
Steve French <smfltc@us.ibm.com> Acked-by:
Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by:
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Nathan Lynch authored
Commit 5c1e1767 ("sched: force /sbin/init off isolated cpus") sets init's cpus_allowed to a subset of cpu_online_map at boot time, which means that tasks won't be scheduled on cpus that are added to the system later. Make init's cpus_allowed a subset of cpu_possible_map instead. This should still preserve the behavior that Nick's change intended. Thanks to Giuliano Pochini for reporting this and testing the fix: http://ozlabs.org/pipermail/linuxppc-dev/2006-December/029397.htmlSigned-off-by:
Nathan Lynch <ntl@pobox.com> Acked-by:
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Stefan Richter authored
Since commit 98e238cd in Linux 2.6.19, "ieee1394: sbp2: don't prefer MODE SENSE 10", some FireWire DVD-ROMs and DVD-RWs were mistaken as CD-ROM because sr_mod now sent MODE SENSE 6. The MMC command set includes only MODE SENSE 10. http://bugzilla.kernel.org/show_bug.cgi?id=7800 This fix lets sbp2 switch scsi_device.use_10_for_rw on for MMC LUs. This should rather be done in the command set driver sr_mod, not in the sbp2 transport driver, and an according patch will follow for a next Linux release. Signed-off-by:
Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by:
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Eric W. Biederman authored
This patch fixes the case when we reparent to a different thread in the same thread group. This modifies the code so that we do not send signals and do not change the signal to send to SIGCHLD unless we have change the thread group of our parents. It also suppresses sending pdeath_sig in this cas as well since the result of geppid doesn't change. Thanks to Oleg for spotting my bug of only fixing this for non-ptraced tasks. This fixes the issues identified by Albert Cahalan in thread http://lkml.org/lkml/2006/12/21/22. Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com> Acked-by:
Mike Galbraith <efault@gmx.de> Cc: Albert Cahalan <acahalan@gmail.com> Cc: Andrew Morton <akpm@osdl.org> Cc: Roland McGrath <roland@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Coywolf Qi Hunt <qiyong@fc-cn.com> Acked-by:
Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by:
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Michael S. Tsirkin authored
mthca_table_find() will return the wrong address when the table entry being searched for is exactly at the beginning of a sglist entry (other than the first), because it uses >= when it should use >. Example: assume we have 2 entries in scatterlist, 4K each, offset is 4K. The current code will return first entry + 4K when we really want the second entry. In particular this means mapping an FMR on a memfree HCA may end up writing the page table into the wrong place, leading to memory corruption and also causing the HCA to use an incorrect address translation table. Signed-off-by:
Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by:
Roland Dreier <rolandd@cisco.com> Signed-off-by:
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Karsten Wiese authored
The previous patch "Repair snd-usb-usx2y for usb 2.6.18" assumed urb->start_frame roll over beyond MAX_INT for both UHCI & OHCI. This isn't true until now (kernel 2.6.20). Fix this by only looking at the common between OHCI & UHCI Frame number range. This is for mainline and stable kernels >= 2.6.18. Signed-off-by:
Karsten Wiese <fzu@wemgehoertderstaat.de> Signed-off-by:
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Patrick McHardy authored
The included patch translates arpt_counters to xt_counters, making userspace arptables compile against recent kernels. Signed-off-by:
Bart De Schuymer <bdschuym@pandora.be> Signed-off-by:
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Patrick McHardy authored
IP_CT_TCP_FLAG_CLOSE_INIT is a flag and should have a value of 0x4 instead of 0x3, which is IP_CT_TCP_FLAG_WINDOW_SCALE | IP_CT_TCP_FLAG_SACK_PERM. Signed-off-by:
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Patrick McHardy authored
When IPv6 connection tracking splits up a defragmented packet into its original fragments, the packets are taken from a list and are passed to the network stack with skb->next still set. This causes dev_hard_start_xmit to treat them as GSO fragments, resulting in a use after free when connection tracking handles the next fragment. Signed-off-by:
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Patrick McHardy authored
Packets generated by the REJECT target in the output chain have a local destination address and a foreign source address. Make sure not to use the foreign source address for the output route lookup. Signed-off-by:
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Lars Ellenberg authored
md raidX make_request functions strip off the BIO_RW_SYNC flag, thus introducing additional latency. Fixing this in raid1 and raid10 seems to be straightforward enough. For our particular usage case in DRBD, passing this flag improved some initialization time from ~5 minutes to ~5 seconds. Acked-by:
NeilBrown <neilb@suse.de> Signed-off-by:
Lars Ellenberg <lars@linbit.com> Acked-by:
Jens Axboe <jens.axboe@oracle.com> Cc: <stable@kernel.org> Signed-off-by:
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Michael Buesch authored
This changes all HWRNG driver initcalls to module_init(). We must probe the RNGs after the major kernel subsystems are already up and running (like PCI). This fixes Bug 7730. http://bugzilla.kernel.org/show_bug.cgi?id=7730Signed-off-by:
Michael Buesch <mb@bu3sch.de> Signed-off-by:
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Christoph Lameter authored
Both process_zones() and drain_node_pages() check for populated zones before touching pagesets. However, __drain_pages does not do so, This may result in a NULL pointer dereference for pagesets in unpopulated zones if a NUMA setup is combined with cpu hotplug. Initially the unpopulated zone has the pcp pointers pointing to the boot pagesets. Since the zone is not populated the boot pageset pointers will not be changed during page allocator and slab bootstrap. If a cpu is later brought down (first call to __drain_pages()) then the pcp pointers for cpus in unpopulated zones are set to NULL since __drain_pages does not first check for an unpopulated zone. If the cpu is then brought up again then we call process_zones() which will ignore the unpopulated zone. So the pageset pointers will still be NULL. If the cpu is then again brought down then __drain_pages will attempt to drain pages by following the NULL pageset pointer for unpopulated zones. Signed-off-by:
Christoph Lameter <clameter@sgi.com> Signed-off-by:
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Philippe De Muyter authored
m41t00.c forgets to set the year field in set_rtc_time; fix that. Signed-off-by:
Philippe De Muyter <phdm@macqel.be> Acked-by:
Mark A. Greer <mgreer@mvista.com> Signed-off-by:
Jean Delvare <khali@linux-fr.org> Signed-off-by:
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Maxime Bizon authored
I have a Marvell board which has the same i2c hw block than mv64xxx, so I'm trying to use i2c-mv64xxx driver. But I get the following random oops at boot: Unable to handle kernel NULL pointer dereference at virtual address 00000002 Backtrace: [<c0397e4c>] (mv64xxx_i2c_intr+0x0/0x2b8) from [<c02879c4>] (__do_irq+0x4c/0x8c) [<c0287978>] (__do_irq+0x0/0x8c) from [<c0287c0c>] (do_level_IRQ+0x68/0xc0) r8 = C0501E08 r7 = 00000005 r6 = C0501E08 r5 = 00000005 r4 = C048BB78 [<c0287ba4>] (do_level_IRQ+0x0/0xc0) from [<c02885f8>] (asm_do_IRQ+0x50/0x134) r6 = C0449C78 r5 = F1020000 r4 = FFFFFFFF [<c02885a8>] (asm_do_IRQ+0x0/0x134) from [<c02869c4>] (__irq_svc+0x24/0x100) r8 = C1CAC400 r7 = 00000005 r6 = 00000002 r5 = F1020000 r4 = FFFFFFFF [<c0287efc>] (setup_irq+0x0/0x124) from [<c02880d0>] (request_irq+0xb0/0xd0) r7 = C041B2AC r6 = C0397E4C r5 = 00000000 r4 = 00000005 [<c0288020>] (request_irq+0x0/0xd0) from [<c03985f4>] (mv64xxx_i2c_probe+0x148/0x244) [<c03984ac>] (mv64xxx_i2c_probe+0x0/0x244) from [<c038bedc>] (platform_drv_probe+0x20/0x24) The oops is caused by a spurious interrupt that occurs when request_irq is called. mv64xxx_i2c_fsm() tries to read drv_data->msg, which is NULL. I noticed that hardware init is done after requesting irq. Thus any pending irq from previous hardware usage may cause this. The following patch fixes it: Signed-off-by:
Maxime Bizon <mbizon@freebox.fr> Acked-by:
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- 10 Jan, 2007 8 commits
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Chris Wright authored
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Peter Zijlstra authored
- add flush_cache_page() for all those virtual indexed cache architectures. - handle s390. Signed-off-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by:
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Linus Torvalds authored
Doug Chapman noticed that mincore() will doa "copy_to_user()" of the result while holding the mmap semaphore for reading, which is a big no-no. While a recursive read-lock on a semaphore in the case of a page fault happens to work, we don't actually allow them due to deadlock schenarios with writers due to fairness issues. Doug and Marcel sent in a patch to fix it, but I decided to just rewrite the mess instead - not just fixing the locking problem, but making the code smaller and (imho) much easier to understand. Cc: Doug Chapman <dchapman@redhat.com> Cc: Marcel Holtmann <holtmann@redhat.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: Andrew Morton <akpm@osdl.org> [chrisw: fold in subsequent fix: 4fb23e43] Acked-by:
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Hugh Dickins authored
These days, if you swapoff when there isn't enough memory, OOM killer gives "BUG: scheduling while atomic" and the machine hangs: badness() needs to do its PF_SWAPOFF return after the task_unlock (tasklist_lock is also held here, so p isn't going to be freed: PF_SWAPOFF might get turned off at any moment, but that doesn't really matter). Signed-off-by:
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Erik Jacobson authored
On ia64, the various functions that make up cn_proc.c cause kernel unaligned access errors. If you are using these, for example, to get notification about all tasks forking and exiting, you get multiple unaligned access errors per process. Use put_unaligned() in the appropriate palces to fix this. Signed-off-by:
Erik Jacobson <erikj@sgi.com> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: Tony Luck <tony.luck@intel.com> Cc: <stable@kernel.org> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by:
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Paul Moore authored
Back when the original NetLabel patches were being changed to use Netlink attributes correctly some code was accidentially dropped which set all of the undefined CIPSOv4 level and category mappings to a sentinel value. The result is the mappings data in the kernel contains bogus mappings which always map to zero. Having level and category mappings that map to zero could result in the kernel assigning incorrect security attributes to packets. This patch restores the old/correct behavior by initializing the mapping data to the correct sentinel value. Signed-off-by:
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David Hollis authored
The attached patch fixes a PHY selection problem that prevents AX88772 based devices (Linksys USB200Mv2, etc) devices from working. The interface comes up and everything seems fine except the device doesn't send/receive any packets. The one-liner attached fixes this issue and makes the devices usable again. Signed-off-by:
David Hollis <dhollis@davehollis.com> Signed-off-by:
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David L Stevens authored
It is important that we only assign dev->ip{,6}_ptr only after all portions of the inet{,6} are setup. Otherwise we can receive packets before the multicast spinlocks et al. are initialized. Signed-off-by:David L Stevens <dlstevens@us.ibm.com> Signed-off-by:
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