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2006-12-31[XFRM]: Algorithm lookup using .compat nameMartin Willi
Installing an IPsec SA using old algorithm names (.compat) does not work if the algorithm is not already loaded. When not using the PF_KEY interface, algorithms are not preloaded in xfrm_probe_algs() and installing a IPsec SA fails. Signed-off-by: Martin Willi <martin@strongswan.org> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-31[NET]: Don't export linux/random.h outside __KERNEL__.David Woodhouse
Don't add it there please; add it lower down inside the existing #ifdef __KERNEL__. You just made the _userspace_ net.h include random.h, which then fails to compile unless <asm/types.h> was already included. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-31[NET]: Add memory barrrier to netif_poll_enable()David S. Miller
When a driver writer calls this, they generally expect that all previous stores and modifications they've made will be visible before netif_poll_enable() executes, so ensure this. Noticed by Ben H. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-30Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2: ocfs2: export heartbeat thread pid via configfs ocfs2: always unmap in ocfs2_data_convert_worker() ocfs2: ignore NULL vfsmnt in ocfs2_should_update_atime() ocfs2: Allow direct I/O read past end of file ocfs2: don't print error in ocfs2_permission()
2006-12-30Merge 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: ieee1394: sbp2: fix bogus dma mapping ieee1394: sbp2: pass REQUEST_SENSE through to the target
2006-12-30[PATCH] fuse: fix typoAlexey Dobriyan
Signed-off-by: Thomas Hisch <t.hisch@gmail.com> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] sparc32: add offset in pci_map_sg()Jan Andersson
Add sg->offset to sg->dvma_address in pci_map_sg() on sparc32. Without the offset, transfers to buffers that do not begin on a page boundary will not work as expected. Signed-off-by: Jan Andersson <jan.andersson@ieee.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: William Lee Irwin III <wli@holomorphy.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] kvm: fix GFP_KERNEL allocation in atomic section in ↵Ingo Molnar
kvm_dev_ioctl_create_vcpu() fix an GFP_KERNEL allocation in atomic section: kvm_dev_ioctl_create_vcpu() called kvm_mmu_init(), which calls alloc_pages(), while holding the vcpu. The fix is to set up the MMU state in two phases: kvm_mmu_create() and kvm_mmu_setup(). (NOTE: free_vcpus does an kvm_mmu_destroy() call so there's no need for any extra teardown branch on allocation/init failure here.) Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] KVM: Fix oops on oomAvi Kivity
__free_page() doesn't like a NULL argument, so check before calling it. A NULL can only happen if memory is exhausted during allocation of a memory slot. Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] KVM: Rename some msrsNguyen Anh Quynh
No need to append _MSR to msr names, a prefix should suffice. Signed-off-by: Nguyen Anh Quynh <aquynh@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] KVM: More msr miseryAvi Kivity
These msrs are referenced by benchmarking software when pretending to be an Intel cpu. Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] KVM: Move common msr handling to arch independent codeAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] KVM: Implement a few system configuration msrsAvi Kivity
Resolves sourceforge bug 1622229 (guest crashes running benchmark software). Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] KVM: Initialize kvm_arch_ops on unloadYoshimi Ichiyanagi
The latest version of kvm doesn't initialize kvm_arch_ops in kvm_init(), which causes an error with the following sequence. 1. Load the supported arch's module. 2. Load the unsupported arch's module.$B!!(B(loading error) 3. Unload the unsupported arch's module. You'll get the following error message after step 3. "BUG: unable to handle to handle kernel paging request at virtual address xxxxxxxx" The problem here is that the unsupported arch's module overwrites kvm_arch_ops of the supported arch's module at step 2. This patch initializes kvm_arch_ops upon loading architecture specific kvm module, and prevents overwriting kvm_arch_ops when kvm_arch_ops is already set correctly. Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] KVM: Simplify is_long_mode()Avi Kivity
Instead of doing tricky stuff with the arch dependent virtualization registers, take a peek at the guest's efer. This simlifies some code, and fixes some confusion in the mmu branch. Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] KVM: Use boot_cpu_data instead of current_cpu_dataAvi Kivity
current_cpu_data invokes smp_processor_id(), which is inadvisable when preemption is enabled. Switch to boot_cpu_data instead. Resolves sourceforge bug 1621401. Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] Update CREDITS and MAINTAINERS entries for Lennert BuytenhekLennert Buytenhek
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] PIIX/SLC90E66: PIO mode fallback fixSergei Shtylyov
The fallback to PIO mode in the hwif->dma_check() handler doesn't work in the Intel PIIX and SMsC SLC90E66 IDE drivers because: - config_drive_for_dma() calls the hwif->speedproc() handler with a wrong mode number (unbiased by XFER_PIO_0) in case of the PIO fallback; - hwif->tuneproc() handler doesn't really set the drive's own speed (this is not fixed as yet). Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] PIIX: remove check for broken MW DMA mode 0Sergei Shtylyov
There's no need to check in piix_config_drive_for_dma() for broken MW DMA mode 0 as this mode is not supported by the driver (it sets hwif->mwdma_mask to 0x6), and hence can't be selected by ide_dma_speed(). (Alan sayeth "Probably right but if not you've got a subtle corruptor. Should at least stick a BUG_ON mode 0 setting right close when the mode is set.") Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] lockdep: printk warning fixAndrew Morton
kernel/lockdep.c: In function `lookup_chain_cache': kernel/lockdep.c:1339: warning: long long unsigned int format, u64 arg (arg 2) kernel/lockdep.c:1344: warning: long long unsigned int format, u64 arg (arg 2) Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] spi_s3c24xx_gpio: use right headerArnaud Patard (Rtp
Russel King recently reminded us that one shouldn't use asm/arch/hardware.h but one should use asm/hardware.h. Unfortunately, the spi_s3c24xx_gpio driver is using the wrong header. This patch is fixing that. Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] respect srctree/objtree in Documentation/DocBook/MakefileMike Frysinger
The KERNELDOC and DOCPROC variables are relative to the $(srctree)/$(objtree) and expect to be run only from there ... attached patch adds proper srctree/objtree prefixes to both variables. Acked-by: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] cpuset procfs warning fixAndrew Morton
fs/proc/base.c:1869: warning: initialization discards qualifiers from pointer target type fs/proc/base.c:2150: warning: initialization discards qualifiers from pointer target type Cc: Paul Jackson <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] Buglet in vmscan.cShantanu Goel
Fix a rather obvious buglet. Noticed while instrumenting the VM using /proc/vmstat. Cc: Christoph Lameter <clameter@engr.sgi.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] ARM: OMAP: fix missing header on apollon boardKyungmin Park
Fix apollon board compiler error Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] ARM: OMAP: fix GPMC compiler errorsKyungmin Park
Fix GPMC compiler errors on OMAP2 Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] SPI/MTD: mtd_dataflash oops preventionDavid Brownell
Return a fault code if the Dataflash driver runs into a "no device present" error when the MISO line has a pulldown (it currently expects a pullup), so that rmmod won't oops. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] m25p80 build fixes (with MTD debug)David Brownell
Fix build issues that show up with the m25p80 SPI flash driver when building with MTD debug enabled. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] SPI: define null tx_buf to mean "shift out zeroes"David Brownell
Some issues were recently turned up with the current specification of what it means for spi_transfer.tx_buf to be null, as part of transfers which are (from the SPI protocol driver perspective) pure reads. Specifically, that it seems better to change the TX behaviour there from "undefined" to "will shift zeroes". This lets protocol drivers (like the ads7846 driver) depend on that behavior. It's what most controller drivers in the tree are already doing (with one exception and one case of driver wanting-to-oops), it's what Microwire hardware will necessarily be doing, and it removes an issue whereby certain security audits would need to define such a value anyway as part of removing covert channels. This patch changes the specification to require shifting zeroes, and updates all currently merged SPI controller drivers to do so. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] page_mkclean_one(): fix call to set_pte_at()Al Viro
(akpm: macros are wonderful) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] cciss: build with PROC_FS=nRandy Dunlap
RAID_UNKNOWN is used even when PROC_FS=n, so move it outside of the CONFIG_PROC_FS block. drivers/block/cciss.c:1910: error: 'RAID_UNKNOWN' undeclared (first use in this function) Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: <mike.miller@hp.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] MM: SLOB is broken by recent cleanup of slab.hDimitri Gorokhovik
Recent cleanup of slab.h broke SLOB allocator: the routine kmem_cache_init has now the __init attribute for both slab.c and slob.c. This routine cannot be removed after init in the case of slob.c -- it serves as a timer callback. Provide a separate timer callback routine, call it once from kmem_cache_init, keep the __init attribute on the latter. Signed-off-by: Dimitri Gorokhovik <dimitri.gorokhovik@free.fr> Cc: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] ramfs breaks without CONFIG_BLOCKDimitri Gorokhovik
ramfs doesn't provide the .set_dirty_page a_op, and when the BLOCK layer is not configured in, 'set_page_dirty' makes a call via a NULL pointer. Signed-off-by: Dimitri Gorokhovik <dimitri.gorokhovik@free.fr> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] module: fix mod_sysfs_setup() return valueAkinobu Mita
mod_sysfs_setup() doesn't return error when kobject_add_dir() failed. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] Fix compilation of via-pmu-backlightAndreas Schwab
Signed-off-by: Andreas Schwab <schwab@suse.de> Cc: "Yu, Luming" <luming.yu@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] sched: fix cond_resched_softirq() offsetIngo Molnar
Remove the __resched_legal() check: it is conceptually broken. The biggest problem it had is that it can mask buggy cond_resched() calls. A cond_resched() call is only legal if we are not in an atomic context, with two narrow exceptions: - if the system is booting - a reacquire_kernel_lock() down() done while PREEMPT_ACTIVE is set But __resched_legal() hid this and just silently returned whenever these primitives were called from invalid contexts. (Same goes for cond_resched_locked() and cond_resched_softirq()). Furthermore, the __legal_resched(0) call was buggy in that it caused unnecessarily long softirq latencies via cond_resched_softirq(). (which is only called from softirq-off sections, hence the code did nothing.) The fix is to resurrect the efficiency of the might_sleep checks and to only allow the narrow exceptions. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] fix mrproper incompletenessMikael Pettersson
include/linux/utsrelease.h and include/linux/version.h aren't removed any more by mrproper in kernel 2.6.20-rc2. The patch below fixes this. The definition of MRPROPER_FILES looks weird: generated-headers looks like a misspelling of generated_headers, but that one is a Makefile target, not a variable or a file, so I don't see how including it in MRPROPER_FILES could have any effect. Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] Update to Documentation/tty.txt on line disciplinesTilman Schmidt
While trying to develop a line discipline I found a couple of things worth mentioning in Documentation/tty.txt which weren't, so I decided to add them. It would be nice if someone more knowledgeable than me in that area would look over them, in case I got something wrong. Signed-off-by: Tilman Schmidt <tilman@imap.cc> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] Char: isicom, eliminate spinlock recursionJiri Slaby
Many spinlock recursion was in the isicom driver. Eliminate it. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] make fn_keys work again on power/macbooksSoeren Sonnenburg
The apple fn keys don't work anymore with 2.6.20-rc1. The reason is that USB_HID_POWERBOOK appears in several files although USB_HIDINPUT_POWERBOOK is the thing to be used. The patch fixes this. Cc: Greg KH <greg@kroah.com> Cc: Dmitry Torokhov <dtor@mail.ru> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] MAINTAINERS: email addr change for Eric MooreEric Moore
Update to maintainers list. My employer has changed the domain from lsil to lsi. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] IB/mthca: Fix FMR breakage caused by kmemdup() conversionMichael S. Tsirkin
Commit bed8bdfd ("IB: kmemdup() cleanup") introduced one bad conversion to kmemdup() in mthca_alloc_fmr(), where the structure allocated and the structure copied are not the same size. Revert this back to the original kmalloc()/memcpy() code. Reported-by: Dotan Barak <dotanb@mellanox.co.il>. Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <roland@digitalvampire.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] Char: mxser, fix oops when removing openedJiri Slaby
tty_driver->owner is not set, so if somebody remove mxser_module, it might oops (and doesn't tell the user: no way, it's in use). Set the .owner value. Cc: <osv@javad.com> Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] pci/probe: fix macro that confuses kernel-docRandy Dunlap
Don't have macros between a function's kernel-doc block and the function definition. This is not valid for kernel-doc. Warning(/var/linsrc/linux-2.6.20-rc1-git8//drivers/pci/probe.c:653): No description found for parameter 'IORESOURCE_PCI_FIXED' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] Add .gitignore file for relocs in arch/i386Thomas Meyer
Due to the changes to make the kernel relocateable a new file is created during the build process. [jirislaby@gmail.com: The .gitigonre was intended to be in arch/ subtree] Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] fix oom killer kills current every time if there is memory-less-node ↵KAMEZAWA Hiroyuki
take2 constrained_alloc(), which is called to detect where oom is from, checks passed zone_list(). If zone_list doesn't include all nodes, it thinks oom is from mempolicy. But there is memory-less-node. memory-less-node's zones are never included in zonelist[]. contstrained_alloc() should get memory_less_node into count. Otherwise, it always thinks 'oom is from mempolicy'. This means that current process dies at any time. This patch fix it. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Paul Jackson <pj@sgi.com> Cc: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] rcu: rcutorture suspend fixIngo Molnar
Fix suspend hang: rcutorture threads need to be nofreeze. Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] change WARN_ON back to "BUG: at ..."Ingo Molnar
WARN_ON() ever triggering is a kernel bug. Do not try to paper over this fact by suggesting to the user that this is 'only' a warning, as the following recent commit does: commit 30e25b71e725b150585e17888b130e3324f8cf7c Author: Jeremy Fitzhardinge <jeremy@goop.org> Date: Fri Dec 8 02:36:24 2006 -0800 [PATCH] Fix generic WARN_ON message A warning is a warning, not a BUG. ( it might make sense to rename BUG() to CRASH() and BUG_ON() to CRASH_ON(), but that does not change the fact that WARN_ON() signals a kernel bug. ) i and others objected to this change during lkml review: http://marc.theaimsgroup.com/?l=linux-kernel&m=116115160710533&w=2 still the change slipped upstream - grumble :) Also, use the standard "BUG: " format to make it easier to grep logs and to make it easier to google for kernel bugs. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] powerpc iseries link error in allmodconfigJudith Lebzelter
Choose rpa_vscsi.c over iseries_vscsi.c when building both pseries and iseries. This fixes a link error. Signed-off-by: Judith Lebzelter <judith@osdl.org> Acked-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-30[PATCH] Fix lock inversion aio_kick_handler()Zach Brown
lockdep found a AB BC CA lock inversion in retry-based AIO: 1) The task struct's alloc_lock (A) is acquired in process context with interrupts enabled. An interrupt might arrive and call wake_up() which grabs the wait queue's q->lock (B). 2) When performing retry-based AIO the AIO core registers aio_wake_function() as the wake funtion for iocb->ki_wait. It is called with the wait queue's q->lock (B) held and then tries to add the iocb to the run list after acquiring the ctx_lock (C). 3) aio_kick_handler() holds the ctx_lock (C) while acquiring the alloc_lock (A) via lock_task() and unuse_mm(). Lockdep emits a warning saying that we're trying to connect the irq-safe q->lock to the irq-unsafe alloc_lock via ctx_lock. This fixes the inversion by calling unuse_mm() in the AIO kick handing path after we've released the ctx_lock. As Ben LaHaise pointed out __put_ioctx could set ctx->mm to NULL, so we must only access ctx->mm while we have the lock. Signed-off-by: Zach Brown <zach.brown@oracle.com> Signed-off-by: Suparna Bhattacharya <suparna@in.ibm.com> Acked-by: Benjamin LaHaise <bcrl@kvack.org> Cc: "Chen, Kenneth W" <kenneth.w.chen@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>