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* [NETLINK]: Fix "nocast type" warningsVictor Fusco2005-07-18
| | | | | | | | | | From: Victor Fusco <victor@cetuc.puc-rio.br> Fix the sparse warning "implicit cast to nocast type" Signed-off-by: Victor Fusco <victor@cetuc.puc-rio.br> Signed-off-by: Domen Puncer <domen@coderock.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PKT_SCHED]: Kill TCF_META_ID_TCCLASSID.Patrick McHardy2005-07-18
| | | | | | | | | | | | | | | | | Thomas Graf states: > I used to mark such ids as obsolete in the header but since > skb is on diet anyway and there has been no official > iproute2 release with the ematch bits included it might be > a better idea to remove the ids from the header completely. > Those that have picked up my patch on netdev shouldn't care > about a ABI breakage, actually I doubt that someone is using > it already. So here's the patch to remove it. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PKT_SCHED]: Reduce branch mispredictions in pfifo_fast_dequeueThomas Graf2005-07-18
| | | | | | | | | | | | | The current call to __qdisc_dequeue_head leads to a branch misprediction for every loop iteration, the fact that the most common priority is 2 makes this even worse. This issue has been brought up by Eric Dumazet <dada1@cosmosbay.com> but unlike his solution which was to manually unroll the loop, this approach preserves the possibility to increase the number of bands at compile time. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PKT_SCHED]: Remove debugging leftover from textsearch ematchThomas Graf2005-07-18
| | | | | Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET PCMCIA]: drivers/net/pcmcia/smc91c92_cs.c : Use of time_after macroMarcelo Feitoza Parisi2005-07-15
| | | | | | | | | | | From: Marcelo Feitoza Parisi <marcelo@feitoza.com.br> Use of the time_after() macro, defined at linux/jiffies.h, which deal with wrapping correctly and are nicer to read. Signed-off-by: Marcelo Feitoza Parisi <marcelo@feitoza.com.br> Signed-off-by: Domen Puncer <domen@coderock.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [WAN]: drivers/net/wan/: use of time_after macroMarcelo Feitoza Parisi2005-07-15
| | | | | | | | | | | From: Marcelo Feitoza Parisi <marcelo@feitoza.com.br> Use of the time_after() macro, defined at linux/jiffies.h, which deal with wrapping correctly and are nicer to read. Signed-off-by: Marcelo Feitoza Parisi <marcelo@feitoza.com.br> Signed-off-by: Domen Puncer <domen@coderock.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CRYPTO]: Fix zero-extension bug on 64-bit architectures.Herbert Xu2005-07-15
| | | | | | | Noticed by Ken-ichirou MATSUZAWA. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PATCH] Option Card driver update, Maintainer entryMatthias Urlichs2005-07-14
| | | | | | | | | | | | | | | | | This patch updates the Option Card driver: - remove a deadlock - add sponsor notice - add new card - renamed the device to what's usually printed on it - removed some dead code - clean up a bunch of irregular whitespace (end-of-line, tabs) Also add a MAINTAINERS entry for the Option Card driver. Signed-Off-By: Matthias Urlichs <smurf@smurf.noris.de> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ratelimit the ieee1394 IR legacy activated messagesOlaf Hering2005-07-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | running coriander1 with an Apple iSight produces lots of dmesg output. Jul 13 22:14:17 ibook kernel: ieee1394: raw1394: /dev/raw1394 device initialized Jul 13 22:15:28 ibook kernel: ohci1394: fw-host0: IR legacy activated Jul 13 22:15:59 ibook last message repeated 208 times Jul 13 22:17:00 ibook last message repeated 762 times Jul 13 22:18:01 ibook last message repeated 914 times Jul 13 22:18:17 ibook last message repeated 238 times Jul 13 22:18:17 ibook kernel: ieee1394: unsolicited response packet received - no tlabel match Jul 13 22:18:17 ibook kernel: ohci1394: fw-host0: IR legacy activated its less noisy with the patch: Jul 14 08:03:08 ibook kernel: ieee1394: raw1394: /dev/raw1394 device initialized Jul 14 08:03:26 ibook kernel: ohci1394: fw-host0: IR legacy activated Jul 14 08:03:42 ibook last message repeated 10 times Jul 14 08:03:47 ibook kernel: printk: 63 messages suppressed. Jul 14 08:03:47 ibook kernel: ohci1394: fw-host0: IR legacy activated Jul 14 08:03:52 ibook kernel: printk: 74 messages suppressed. Signed-off-by: Olaf Hering <olh@suse.de> Cc: Jody McIntyre <scjody@modernduck.com> Cc: Ben Collins <bcollins@debian.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] remove EXPORT_SYMBOL for root_devPaolo 'Blaisorblade' Giarrusso2005-07-14
| | | | | | | | | | | Remove ROOT_DEV after unexporting it in the previous patch, as requested time ago by Christoph Hellwig. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Christoph Hellwig <hch@infradead.org> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: hostfs: unuse ROOT_DEVPaolo 'Blaisorblade' Giarrusso2005-07-14
| | | | | | | | | | | | Minimal patch removing uses of ROOT_DEV; next patch unexports it. I've opposed this, but I've planned to reintroduce the functionality without using ROOT_DEV. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Christoph Hellwig <hch@infradead.org> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: allow building as 32-bit binary on 64bit hostPaolo 'Blaisorblade' Giarrusso2005-07-14
| | | | | | | | | | | | | | | | | | This patch makes the command: make ARCH=um SUBARCH=i386 work on x86_64 hosts (with support for building 32-bit binaries). This is especially needed since 64-bit UMLs don't support 32-bit emulation for guest binaries, currently. This has been tested in all possible cases and works. Only exception is that I've built but not tested a 64-bit binary, because I hadn't a 64-bit filesystem available. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: reintroduce pcap supportPaolo 'Blaisorblade' Giarrusso2005-07-14
| | | | | | | | | | | | | | The pcap support was not working because of some linking problems (expressing the construct in Kbuild was a bit difficult) and because there was no user request. Now that this has come back, here's the support. This has been tested and works on both 32 and 64-bit hosts, even when "cross-"building 32-bit binaries. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: fix hppfs error pathPaolo 'Blaisorblade' Giarrusso2005-07-14
| | | | | | | | | | Fix the error message to refer to the error code, i.e. err, not count, plus add some cosmetical fixes. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: gcc 2.95 fix and Makefile cleanupPaolo 'Blaisorblade' Giarrusso2005-07-14
| | | | | | | | | | | | | | | | | | 1) Cleanup an ugly hyper-nested code in Makefile (now only the arith. expression is passed through the host bash). 2) Fix a problem with GCC 2.95: according to a report from Raphael Bossek, .remap_data : { arch/um/sys-SUBARCH/unmap_fin.o (.data .bss) } is expanded into: .remap_data : { arch/um/sys-i386 /unmap_fin.o (.data .bss) } (because I didn't use ## to join the two tokens), thus stopping linking. Pass the whole path from the Makefile as a simple and nice fix. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Raphael Bossek <raphael.bossek@gmx.de> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: consolidate modify_ldtPaolo 'Blaisorblade' Giarrusso2005-07-14
| | | | | | | | | | | | | | | | *) Reorganize the two cases of sys_modify_ldt to share all the reasonably common code. *) Avoid memory allocation when unneeded (i.e. when we are writing and the passed buffer size is known), thus not returning ENOMEM (which isn't allowed for this syscall, even if there is no strict "specification"). *) Add copy_{from,to}_user to modify_ldt for TT mode. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: workaround host bug in "TT mode vs. NPTL link fix"Paolo 'Blaisorblade' Giarrusso2005-07-14
| | | | | | | | | | | | | | | | | | | A big bug has been diagnosed on hosts running the SKAS patch and built with CONFIG_REGPARM, due to some missing prevent_tail_call(). On these hosts, this workaround is needed to avoid triggering that bug, because "to" is kept by GCC only in EBX, which is corrupted at the return of mmap2(). Since to trigger this bug int 0x80 must be used when doing the call, it rarely manifests itself, so I'd prefer to get this merged to workaround that host bug, since it should cause no functional change. Still, you might prefer to drop it, I'll leave this to you. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: fix lvalue for gcc4Paolo 'Blaisorblade' Giarrusso2005-07-14
| | | | | | | | | | | | | | | | | | | | | | Russell King <rmk+lkml@arm.linux.org.uk> This construct is refused by GCC 4, so here's the (corrected) fix. Thanks to Russell for noticing a stupid mistake I did when first sending this. As he noted, the code is largely suboptimal however it currently works, and will be fixed shortly. Just read the access_ok check on fp which is NULL, or the pointer arithmetic below which should be done with a cast to void*: frame = (struct rt_sigframe __user *) round_down(stack_top - sizeof(struct rt_sigframe), 16) - 8; The code shows clearly that has been taken from arch/x86_64/kernel/signal.c:setup_rt_frame(), maybe in a bit of a hurry. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] dvb: LGDT3302 QAM lock bug fixMichael Krufky2005-07-14
| | | | | | | | | | Fix QAM lock bug. Previously, it was necessary to first scan in VSB before attempting to get a QAM lock. Signed-off-by: Mac Michaels <wmichaels1@earthlink.net> Signed-off-by: Michael Krufky <mkrufky@m1k.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/aegl/linux-2.6Linus Torvalds2005-07-13
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| * Auto merge with /home/aegl/GIT/linusTony Luck2005-07-13
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| * | [IA64] Make PCDP work again.David Mosberger-Tang2005-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | Mark's patch added "attribute((packed))" for pcdp_uart, without accounting for the fact that the structure definition _relied_ on implicit padding by 6 bytes. Fix is to make the padding explicit. Signed-off-by: David Mosberger-Tang <David.Mosberger@acm.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] fix call of smp_processor_id() by XPC whileDean Nelson2005-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | XPC calls smp_processor_id() twice from xpc_setup_infrastructure() with preemption enabled, which gets flagged if 'DEBUG_PREEMPT=y'. This patch replaces the two calls to smp_processor_id() by a single call to raw_smp_processor_id() since any CPU within the partition will do. Signed-off-by: Dean Nelson <dcn@sgi.com> Acked-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] Altix pcibus_to_node implementationChristoph Lameter2005-07-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Altix subarch does not provide node information via ACPI. Instead hooks are used to fixup pci structures. This patch determines the nodes for Altix PCI busses. Remote Bridges: --------------- Altix supports remote I/O nodes without memory or processors but with bridges. The TIOCA type of bridge is an AGP bridge and the PROM provides information about the closest node. That information will be returned by pcibus_to_node. The TIOCP remote bridge type is a PCI bridge but the PROM does not provide a closest node id. pcibus_to_node will return -1 for devices on those bridges meaning that device control structures may be allocated on any node. Safeguard: ---------- Should the fixups result in invalid node information for a pci controller then a warning will be printed and pcibus_to_node will return -1. This patch also fixes the "FIXME" in sn_dma_alloc_coherent. This means that dma_alloc_coherent will now use alloc_pages_node to allocate memory local to the node that the PCI device is connected to. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] improve flush_icache_range()Zoltan Menyhart2005-07-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | Check with PAL to see what the i-cache line size is for each level of the cache, and so use the correct stride when flushing the cache. Acked-by: David Mosberger Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] remove CONFIG_IA64_SGI_SN_SIMGreg Edwards2005-07-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the CONFIG_IA64_SGI_SN_SIM option entirely, allowing any kernel bootable on sn2 to also be booted in the simulator. Boot tested on Altix and HP rx2600. Signed-off-by: Greg Edwards <edwardsg@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] pcibus_to_node implementation for IA64Christoph Lameter2005-07-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | pcibus_to_node provides a way for the Linux kernel to identify to which node a certain pcibus connects to. Allocations of control structures for devices can then be made on the node where the pci bus is located to allow local access during interrupt and other device manipulation. This patch provides a new "node" field in the the pci_controller structure. The node field will be set based on ACPI information (thanks to Alex Williamson <alex.williamson@hp.com for that piece). Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | [PATCH] v850: Align ___start___param to match parameter alignmentMiles Bader2005-07-13
| | | | | | | | | | | | | | | Signed-off-by: Miles Bader <miles@gnu.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | Merge master.kernel.org:/pub/scm/linux/kernel/git/tglx/mtd-2.6Linus Torvalds2005-07-13
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| * | | [MTD] cfi_cmdset_0002: Plugged a mem leak.Joern Engel2005-07-13
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Joern Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | Merge with rsync://fileserver/linuxThomas Gleixner2005-07-13
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| * \ \ \ Merge with rsync://fileserver/linuxTodd Poynor2005-07-12
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| * | | | | [JFFS2] Avoid compiler warnings when JFFS2_FS_WRITEBUFFER=nTodd Poynor2005-07-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Todd Poynor <tpoynor@mvista.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | | [JFFS2] Init locks early during mountArtem B. Bityuckiy2005-07-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case of a mount error locks might be uninitialized but accessed by the resulting call to jffs2_kill_sb(). Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | | [JFFS2] Rename function and update commentsArtem B. Bityuckiy2005-07-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We recently changed the method of collecting and sorting of tmp_dnode objects to use a temporary RB-tree instead of a temporary list. Rename function and update comments. Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | | [JFFS2] Remove needless variable initializationArtem B. Bityuckiy2005-07-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | | [JFFS2] Avoid alloc/dealloc for zero sized nodesArtem B. Bityuckiy2005-07-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | | [MTD] Make XIP support depend on CONFIG_ARMThomas Gleixner2005-07-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ARM is the only known user of this at the moment. Prevent allyes builds for other archs from failing Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | | | | | [PATCH] Amiga joystick: Fix typo introduced by the open/close race fixesGeert Uytterhoeven2005-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | [PATCH] ppc64: add 970MP PVROlof Johansson2005-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add PVR value and tests for 970MP. Also switch to a simpler (but slightly longer) check at init time for simplicity. Signed-off-by: Olof Johansson <olof@austin.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | [PATCH] ppc64: kill bitfields in ppc64 hash codeDavid Gibson2005-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the use of bitfield types from the ppc64 hash table manipulation code. Signed-off-by: David Gibson <dwg@au1.ibm.com> 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>
* | | | | | [PATCH] ppc32: make -j12 all fails in uImage targetOlaf Hering2005-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | make -j zImage may call if_changed twice at the same time, the result is a corrupted vmlinux.gz Write to a temporary file for the time being until someone with make skills fix the serialization properly. Signed-off-by: Olaf Hering <olh@suse.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Sam Ravnborg <sam@ravnborg.org> Acked-by: Tom Rini <trini@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | [PATCH] NFS: procfs/sysctl interfaces for lockd do not work on x86_64Steve Dickson2005-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allow the setting of NLM timeouts and grace periods through the proc and sysclt interfaces on x86_64 architectures Signed-off-by: Steve Dickson <steved@redhat.com> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | [PATCH] s390: fadvise hint values.Martin Schwidefsky2005-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add special case for the POSIX_FADV_DONTNEED and POSIX_FADV_NOREUSE hint values for s390-64. The user space values in the s390-64 glibc headers for these two defines have always been 6 and 7 instead of 4 and 5. All 64 bit applications therefore use the "wrong" values. To get these applications working without recompiling the kernel needs to accept the "wrong" values. Since the values for s390-31 are 4 and 5 the compat wrapper for fadvise64 and fadvise64_64 need to rewrite the values for 31 bit system calls. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | [PATCH] ppc32: fix destroy_context() race conditionGuillaume Autran2005-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix for a race condition when a task gets preempted by another task while executing the destroy_context(...) in a FEW_CONTEXTS environment. mm->context == NO_CONTEXT but the context_map may indicate all contexts are in use. The solution to this problem is to disable kernel preemption while destroying a MMU context. Signed-off-by: Guillaume Autran <gautran@mrv.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | | [PATCH] Fix soft lockup due to NTFS: VFS part and explanationAnton Altaparmakov2005-07-13
| |_|_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Something has changed in the core kernel such that we now get concurrent inode write outs, one e.g via pdflush and one via sys_sync or whatever. This causes a nasty deadlock in ntfs. The only clean solution unfortunately requires a minor vfs api extension. First the deadlock analysis: Prerequisive knowledge: NTFS has a file $MFT (inode 0) loaded at mount time. The NTFS driver uses the page cache for storing the file contents as usual. More interestingly this file contains the table of on-disk inodes as a sequence of MFT_RECORDs. Thus NTFS driver accesses the on-disk inodes by accessing the MFT_RECORDs in the page cache pages of the loaded inode $MFT. The situation: VFS inode X on a mounted ntfs volume is dirty. For same inode X, the ntfs_inode is dirty and thus corresponding on-disk inode, which is as explained above in a dirty PAGE_CACHE_PAGE belonging to the table of inodes ($MFT, inode 0). What happens: Process 1: sys_sync()/umount()/whatever... calls __sync_single_inode() for $MFT -> do_writepages() -> write_page for the dirty page containing the on-disk inode X, the page is now locked -> ntfs_write_mst_block() which clears PageUptodate() on the page to prevent anyone else getting hold of it whilst it does the write out (this is necessary as the on-disk inode needs "fixups" applied before the write to disk which are removed again after the write and PageUptodate is then set again). It then analyses the page looking for dirty on-disk inodes and when it finds one it calls ntfs_may_write_mft_record() to see if it is safe to write this on-disk inode. This then calls ilookup5() to check if the corresponding VFS inode is in icache(). This in turn calls ifind() which waits on the inode lock via wait_on_inode whilst holding the global inode_lock. Process 2: pdflush results in a call to __sync_single_inode for the same VFS inode X on the ntfs volume. This locks the inode (I_LOCK) then calls write-inode -> ntfs_write_inode -> map_mft_record() -> read_cache_page() of the page (in page cache of table of inodes $MFT, inode 0) containing the on-disk inode. This page has PageUptodate() clear because of Process 1 (see above) so read_cache_page() blocks when tries to take the page lock for the page so it can call ntfs_read_page(). Thus Process 1 is holding the page lock on the page containing the on-disk inode X and it is waiting on the inode X to be unlocked in ifind() so it can write the page out and then unlock the page. And Process 2 is holding the inode lock on inode X and is waiting for the page to be unlocked so it can call ntfs_readpage() or discover that Process 1 set PageUptodate() again and use the page. Thus we have a deadlock due to ifind() waiting on the inode lock. The only sensible solution: NTFS does not care whether the VFS inode is locked or not when it calls ilookup5() (it doesn't use the VFS inode at all, it just uses it to find the corresponding ntfs_inode which is of course attached to the VFS inode (both are one single struct); and it uses the ntfs_inode which is subject to its own locking so I_LOCK is irrelevant) hence we want a modified ilookup5_nowait() which is the same as ilookup5() but it does not wait on the inode lock. Without such functionality I would have to keep my own ntfs_inode cache in the NTFS driver just so I can find ntfs_inodes independent of their VFS inodes which would be slow, memory and cpu cycle wasting, and incredibly stupid given the icache already exists in the VFS. Below is a patch that does the ilookup5_nowait() implementation in fs/inode.c and exports it. ilookup5_nowait.diff: Introduce ilookup5_nowait() which is basically the same as ilookup5() but it does not wait on the inode's lock (i.e. it omits the wait_on_inode() done in ifind()). This is needed to avoid a nasty deadlock in NTFS. Signed-off-by: Anton Altaparmakov <aia21@cantab.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | [PATCH] inotify: misc cleanupRobert Love2005-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Really simple, basic cleanup. Signed-off-by: Robert Love <rml@novell.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | [PATCH] inotify: event orderingRobert Love2005-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This rearranges the event ordering for "open" to be consistent with the ordering of the other events. Signed-off-by: Robert Love <rml@novell.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | [PATCH] inotify: move sysctlRobert Love2005-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This moves the inotify sysctl knobs to "/proc/sys/fs/inotify" from "/proc/sys/fs". Also some related cleanup. Signed-off-by: Robert Love <rml@novell.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | [PATCH] fix voyager subarchitecture EXPORT_SYMBOL breakage caused by ↵James Bottomley2005-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | i386_ksym reduction This patch: [PATCH] Remove i386_ksyms.c, almost made files like smp.c do their own EXPORT_SYMBOLS. This means that all subarchitectures that override these symbols now have to do the exports themselves. This patch adds the exports for voyager (which is the most affected since it has a separate smp harness). However, someone should audit all the other subarchitectures to see if any others got broken. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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