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* ARM: OMAP: omap camera builds again; Mistral init and muxDavid Brownell2007-09-20
| | | | | | | | | | | Support the camera connector on the OSK Mistral add-on board: - define muxing for both camera controllers - mux both of them for Mistral - teach ov9640 glue about mistral powerup/powerdown Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Tony Lindgren <tony@atomide.com>
* sched: add /proc/sys/kernel/sched_compat_yieldIngo Molnar2007-09-19
| | | | | | | | | | | | | | | | | | | | | add /proc/sys/kernel/sched_compat_yield to make sys_sched_yield() more agressive, by moving the yielding task to the last position in the rbtree. with sched_compat_yield=0: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2539 mingo 20 0 1576 252 204 R 50 0.0 0:02.03 loop_yield 2541 mingo 20 0 1576 244 196 R 50 0.0 0:02.05 loop with sched_compat_yield=1: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2584 mingo 20 0 1576 248 196 R 99 0.0 0:52.45 loop 2582 mingo 20 0 1576 256 204 R 0 0.0 0:00.00 loop_yield Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
* Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2007-09-19
|\ | | | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] cpu-bugs64.c: GCC 3.3 constraint workaround [MIPS] DEC: Initialise ioasic_ssr_lock
| * [MIPS] cpu-bugs64.c: GCC 3.3 constraint workaroundMaciej W. Rozycki2007-09-19
| | | | | | | | | | | | | | | | Add a workaround to address warnings generated on the "n" constraint by GCC 3.3 and below. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | Merge branch 'merge' of ↵Linus Torvalds2007-09-19
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] Fix timekeeping on PowerPC 601 [POWERPC] Don't expose clock vDSO functions when CPU has no timebase [POWERPC] spusched: Fix null pointer dereference in find_victim
| * | [POWERPC] Fix timekeeping on PowerPC 601Benjamin Herrenschmidt2007-09-19
| |/ | | | | | | | | | | | | | | | | | | | | Recent changes to the timekeeping code broke support for the PowerPC 601 processor which doesn't have the usual timebase facility but a slightly different thing called (yuck) the RTC. This fixes it, boot tested on an old 601 based PowerMac 7200. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | Fix NUMA Memory Policy Reference CountingLee Schermerhorn2007-09-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch proposes fixes to the reference counting of memory policy in the page allocation paths and in show_numa_map(). Extracted from my "Memory Policy Cleanups and Enhancements" series as stand-alone. Shared policy lookup [shmem] has always added a reference to the policy, but this was never unrefed after page allocation or after formatting the numa map data. Default system policy should not require additional ref counting, nor should the current task's task policy. However, show_numa_map() calls get_vma_policy() to examine what may be [likely is] another task's policy. The latter case needs protection against freeing of the policy. This patch adds a reference count to a mempolicy returned by get_vma_policy() when the policy is a vma policy or another task's mempolicy. Again, shared policy is already reference counted on lookup. A matching "unref" [__mpol_free()] is performed in alloc_page_vma() for shared and vma policies, and in show_numa_map() for shared and another task's mempolicy. We can call __mpol_free() directly, saving an admittedly inexpensive inline NULL test, because we know we have a non-NULL policy. Handling policy ref counts for hugepages is a bit trickier. huge_zonelist() returns a zone list that might come from a shared or vma 'BIND policy. In this case, we should hold the reference until after the huge page allocation in dequeue_hugepage(). The patch modifies huge_zonelist() to return a pointer to the mempolicy if it needs to be unref'd after allocation. Kernel Build [16cpu, 32GB, ia64] - average of 10 runs: w/o patch w/ refcount patch Avg Std Devn Avg Std Devn Real: 100.59 0.38 100.63 0.43 User: 1209.60 0.37 1209.91 0.31 System: 81.52 0.42 81.64 0.34 Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Acked-by: Andi Kleen <ak@suse.de> Cc: Christoph Lameter <clameter@sgi.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Fix user namespace exiting OOPsPavel Emelyanov2007-09-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It turned out, that the user namespace is released during the do_exit() in exit_task_namespaces(), but the struct user_struct is released only during the put_task_struct(), i.e. MUCH later. On debug kernels with poisoned slabs this will cause the oops in uid_hash_remove() because the head of the chain, which resides inside the struct user_namespace, will be already freed and poisoned. Since the uid hash itself is required only when someone can search it, i.e. when the namespace is alive, we can safely unhash all the user_struct-s from it during the namespace exiting. The subsequent free_uid() will complete the user_struct destruction. For example simple program #include <sched.h> char stack[2 * 1024 * 1024]; int f(void *foo) { return 0; } int main(void) { clone(f, stack + 1 * 1024 * 1024, 0x10000000, 0); return 0; } run on kernel with CONFIG_USER_NS turned on will oops the kernel immediately. This was spotted during OpenVZ kernel testing. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Acked-by: "Serge E. Hallyn" <serue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Convert uid hash to hlistPavel Emelyanov2007-09-19
|/ | | | | | | | | | | | Surprisingly, but (spotted by Alexey Dobriyan) the uid hash still uses list_heads, thus occupying twice as much place as it could. Convert it to hlist_heads. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'master' of ↵Linus Torvalds2007-09-17
|\ | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 * 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Warn user if cpu is ignored. [SPARC64]: Fix lockdep, particularly on SMP. [SPARC64]: Update defconfig.
| * [SPARC64]: Fix lockdep, particularly on SMP.David S. Miller2007-09-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As noted by Al Viro, when we try to call prom_set_trap_table() in the SMP trampoline code we try to take the PROM call spinlock which doesn't work because the current thread pointer isn't valid yet and lockdep depends upon that being correct. Furthermore, we cannot set the current thread pointer register because it can't be properly dereferenced until we return from prom_set_trap_table(). Kernel TLB misses only work after that call. So do the PROM call to set the trap table directly instead of going through the OBP library C code, and thus avoid the lock altogether. These calls are guarenteed to be serialized fully. Since there are now no calls to the prom_set_trap_table{_sun4v}() library functions, they can be deleted. Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'master' of ↵Linus Torvalds2007-09-17
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 * 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: [VLAN]: Fix net_device leak. [PPP] generic: Fix receive path data clobbering & non-linear handling [PPP] generic: Call skb_cow_head before scribbling over skb [NET] skbuff: Add skb_cow_head [BRIDGE]: Kill clone argument to br_flood_* [PPP] pppoe: Fill in header directly in __pppoe_xmit [PPP] pppoe: Fix data clobbering in __pppoe_xmit and return value [PPP] pppoe: Fix skb_unshare_check call position [SCTP]: Convert bind_addr_list locking to RCU [SCTP]: Add RCU synchronization around sctp_localaddr_list [PKT_SCHED]: sch_cbq.c: Shut up uninitialized variable warning [PKTGEN]: srcmac fix [IPV6]: Fix source address selection. [IPV4]: Just increment OutDatagrams once per a datagram. [IPV6]: Just increment OutDatagrams once per a datagram. [IPV6]: Fix unbalanced socket reference with MSG_CONFIRM. [NET_SCHED] protect action config/dump from irqs [NET]: Fix two issues wrt. SO_BINDTODEVICE.
| * | [NET] skbuff: Add skb_cow_headHerbert Xu2007-09-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds an optimised version of skb_cow that avoids the copy if the header can be modified even if the rest of the payload is cloned. This can be used in encapsulating paths where we only need to modify the header. As it is, this can be used in PPPOE and bridging. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [SCTP]: Convert bind_addr_list locking to RCUVlad Yasevich2007-09-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since the sctp_sockaddr_entry is now RCU enabled as part of the patch to synchronize sctp_localaddr_list, it makes sense to change all handling of these entries to RCU. This includes the sctp_bind_addrs structure and it's list of bound addresses. This list is currently protected by an external rw_lock and that looks like an overkill. There are only 2 writers to the list: bind()/bindx() calls, and BH processing of ASCONF-ACK chunks. These are already seriealized via the socket lock, so they will not step on each other. These are also relatively rare, so we should be good with RCU. The readers are varied and they are easily converted to RCU. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Sridhar Samdurala <sri@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | [SCTP]: Add RCU synchronization around sctp_localaddr_listVlad Yasevich2007-09-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sctp_localaddr_list is modified dynamically via NETDEV_UP and NETDEV_DOWN events, but there is not synchronization between writer (even handler) and readers. As a result, the readers can access an entry that has been freed and crash the sytem. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Sridhar Samdurala <sri@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | Fix non-ISA link error in drivers/scsi/advansys.cMatthew Wilcox2007-09-17
| |/ |/| | | | | | | | | | | | | When CONFIG_ISA is disabled, the isa_driver support will not be compiled in. Define stubs so that we don't get link-time errors. Signed-off-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge git://git.linux-xtensa.org/kernel/xtensa-feedLinus Torvalds2007-09-14
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.linux-xtensa.org/kernel/xtensa-feed: [patch 1/2] Xtensa: enable arbitary tty speed setting ioctls [patch 2/2] xtensa console.c: remove duplicate #include [XTENSA] Add support for cache-aliasing [XTENSA] Add kernel module support [XTENSA] Add support for executable/non-executable feature in the mmu [XTENSA] Use the generic version of get_order [XTENSA] Initialize semaphore_wake_lock [XTENSA] Add typecast macro for constants [XTENSA] Fix timer instabilities. [XTENSA] Fix fadvise64_64 [XTENSA] Remove extraneous include statement [XTENSA] Move string-io functions to io.c from pci.c [XTENSA] Move pre-initialized structures to init_task.c [XTENSA] Add freestanding option to CFLAGS [XTENSA] Add getpgrp system-call to unistd.h [XTENSA] add missing system calls [XTENSA] fix wrong usage of __init and __initdata in traps.c
| * | [patch 1/2] Xtensa: enable arbitary tty speed setting ioctlsAlan Cox2007-08-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | Adding the defines/constants activates the existing code in the tty layer and allows arbitary tty speeds to be requested on this platform Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Zankel <chris@zankel.net>
| * | [XTENSA] Add support for cache-aliasingChris Zankel2007-08-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for processors that have cache-aliasing issues, such as the Stretch S5000 processor. Cache-aliasing means that the size of the cache (for one way) is larger than the page size, thus, a page can end up in several places in cache depending on the virtual to physical translation. The method used here is to map a user page temporarily through the auto-refill way 0 and of of the DTLB. We probably will want to revisit this issue and use a better approach with kmap/kunmap. Signed-off-by: Chris Zankel <chris@zankel.net>
| * | [XTENSA] Add kernel module supportChris Zankel2007-08-27
| | | | | | | | | | | | | | | | | | Add kernel module support. Signed-off-by: Chris Zankel <chris@zankel.net>
| * | [XTENSA] Add support for executable/non-executable feature in the mmuChris Zankel2007-08-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | Newer processor versions starting with Xtensa6/LX2 support an 'executable' bit for memory pages. This bit replaces the 'valid' bit, so it must be always set to one for older processor versions. To mark a page invalid, we now set the cache-attributes to b11, which is backward compatible. Signed-off-by: Chris Zankel <chris@zankel.net>
| * | [XTENSA] Use the generic version of get_orderChris Zankel2007-08-27
| | | | | | | | | | | | | | | | | | | | | Use the generic version of get_order for processor configurations that don't have the 'nsa/nsau' instructions. Signed-off-by: Chris Zankel <chris@zankel.net>
| * | [XTENSA] Add typecast macro for constantsChris Zankel2007-08-27
| | | | | | | | | | | | | | | | | | | | | Add macros (__XTENSA_UL and __XTENSA_UL_CONST) for typecasting constants. Signed-off-by: Chris Zankel <chris@zankel.net>
| * | [XTENSA] Fix timer instabilities.Chris Zankel2007-08-27
| | | | | | | | | | | | | | | | | | The timer code could have missed a tick. Signed-off-by: Chris Zankel <chris@zankel.net>
| * | [XTENSA] Fix fadvise64_64Chris Zankel2007-08-27
| | | | | | | | | | | | | | | | | | | | | | | | Xtensa passes long long arguments in a even/odd register pair, so we also need to shuffle the arguments when passed through the system call to avoid an empty argument register. Signed-off-by: Chris Zankel <chris@zankel.net>
| * | [XTENSA] Remove extraneous include statementChris Zankel2007-08-27
| | | | | | | | | | | | | | | | | | We don't need to include processor.h in bug.h. Signed-off-by: Chris Zankel <chris@zankel.net>
| * | [XTENSA] Add getpgrp system-call to unistd.hChris Zankel2007-08-27
| | | | | | | | | | | | | | | | | | | | | Although __ARCH_WANT_SYS_GETPGRP was defined, the actualy entry for the getpgrp system-call was missing. Signed-off-by: Chris Zankel <chris@zankel.net>
| * | [XTENSA] add missing system callsChris Zankel2007-08-27
| | | | | | | | | | | | | | | | | | | | | | | | Add missing system calls that have been recently added to the kernel for the Xtensa architecture and define __IGNORE macros for system calls that we don't need for Xtensa. Signed-off-by: Chris Zankel <chris@zankel.net>
* | | Merge branch 'for-linus' of ↵Linus Torvalds2007-09-14
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/cooloney/blackfin-2.6 * 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: Blackfin arch: fix some bugs in lib/string.h functions found by our string testing modules Blackfin arch: fix the aliased write macros Blackfin arch: Update/Fix PM support add new pm_ops valid
| * | | Blackfin arch: fix some bugs in lib/string.h functions found by our string ↵Mike Frysinger2007-09-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | testing modules - use ints for the return value rather than char since we actually return an int and we dont want it improperly being sign extended during the reload http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3525 - if src is shorter than the requested number of copy bytes, we need to null pad the rest http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3524 - mark these as __volatile__ and add memory to the clobber list so gcc does not optimize buffers around on us we may be using - rewrite asm code to be readable/maintainable Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | | Blackfin arch: fix the aliased write macrosRobin Getz2007-08-05
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* | | | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2007-09-14
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] 20Kc: Disable use of WAIT instruction. [MIPS] Workaround for 4Kc machine check exception [MIPS] Malta: Fix off by one bug in interrupt handler. [MIPS] No ide_default_io_base() if PCI IDE was not found [MIPS] Add #include <linux/profile.h> to arch/mips/kernel/time.c [MIPS] N32 needs to use compat_sys_futimesat [MIPS] rtlx: Fix build error. [MIPS] rtlx: fix int vs. long bug.
| * | | | [MIPS] No ide_default_io_base() if PCI IDE was not foundAtsushi Nemoto2007-09-14
| | |_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Revert b5438582090406e2ccb4169d9b2df7c9939ae42b and add no_pci_devices() check to avoid crash due to early calling of pci_get_class(). Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* / | | V4L/DVB (6220a): fix build error for et61x251 driverLinus Torvalds2007-09-14
|/ / / | | | | | | | | | Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* | | Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-ledsLinus Torvalds2007-09-12
|\ \ \ | | | | | | | | | | | | | | | | * 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds: leds: Add missing include for leds.h
| * | | leds: Add missing include for leds.hYoichi Yuasa2007-09-11
| |/ / | | | | | | | | | | | | | | | | | | | | | This patch has added #include <linux/spinlock.h> to include/linux/leds.h for rwlock_t. Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
* | | Define termios_1 functions for powerpc, s390, avr32 and frvPaul Mackerras2007-09-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit f629307c857c030d5a3dd777fee37c8bb395e171 introduced uses of kernel_termios_to_user_termios_1 and user_termios_to_kernel_termios_1 on all architectures. However, powerpc, s390, avr32 and frv don't currently define those functions since their termios struct didn't need to be changed when the arbitrary baud rate stuff was added, and thus the kernel won't currently build on those architectures. This adds definitions of kernel_termios_to_user_termios_1 and user_termios_to_kernel_termios_1 to include/asm-generic/termios.h which are identical to kernel_termios_to_user_termios and user_termios_to_kernel_termios respectively. The definitions are the same because the "old" termios and "new" termios are in fact the same on these architectures (which are the same ones that use asm-generic/termios.h). Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Alan Cox <alan@redhat.com> Cc: David Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'for-linus' of ↵Linus Torvalds2007-09-12
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: usbtouchscreen - correctly set 'phys' Input: i8042 - add HP Pavilion DV4270ca to the MUX blacklist Input: i8042 - fix modpost warning Input: add more Braille keycodes
| * | | Input: add more Braille keycodesSamuel Thibault2007-09-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some braille keyboards have 10 dots, so extend the Input braille keys definitions. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
* | | | m68k(nommu): add missing syscallsGeert Uytterhoeven2007-09-11
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | Fix select on /proc files without ->pollAlexey Dobriyan2007-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Taneli Vähäkangas <vahakang@cs.helsinki.fi> reported that commit 786d7e1612f0b0adb6046f19b906609e4fe8b1ba aka "Fix rmmod/read/write races in /proc entries" broke SBCL + SLIME combo. The old code in do_select() used DEFAULT_POLLMASK, if couldn't find ->poll handler. The new code makes ->poll always there and returns 0 by default, which is not correct. Return DEFAULT_POLLMASK instead. Steps to reproduce: install emacs, SBCL, SLIME emacs M-x slime in *inferior-lisp* buffer [watch it doing "Connecting to Swank on port X.."] Please, apply before 2.6.23. P.S.: why SBCL can't just read(2) /proc/cpuinfo is a mystery. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: T Taneli Vahakangas <vahakang@cs.helsinki.fi> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | PTR_ALIGNMatthew Wilcox2007-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The AdvanSys driver wants to align some pointers, and the ALIGN macro doesn't work for pointers. Rather than try to make it work, add a new PTR_ALIGN macro which is typesafe. Signed-off-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | BCM1480 serial build fixThiemo Seufer2007-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Restores serial functionality for the BCM1480. Signed-off-by: Thiemo Seufer <ths@networkno.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | Merge master.kernel.org:/pub/scm/linux/kernel/git/bart/ide-2.6Linus Torvalds2007-09-11
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/bart/ide-2.6: pdc202xx_new: PLL detection fix via82cxxx: add Arima W730-K8 and other rebadgings to short cables list pmac: build fix pata_ali/alim15x3: override 80-wire cable detection for Toshiba S1800-814 hpt366: UltraDMA filter for SATA cards (take 2) ide: add ide_dev_is_sata() helper (take 2) hpt366: fix PCI clock detection for HPT374 (take 4) pdc202xx_new: fix PCI refcounting ide: fix PCI refcounting mpc8xx: Only build mpc8xx on arch/ppc
| * | | | ide: add ide_dev_is_sata() helper (take 2)Sergei Shtylyov2007-09-11
| | |/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the SATA drive detection code from eighty_ninty_three() into inline ide_dev_is_sata() helper fixing it along the way to be more strict while checking word 80 for the reserved values... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* | | | Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6Linus Torvalds2007-09-11
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6: PCI: irq and pci_ids patch for Intel Tolapai PCI: unhide SMBus on Compaq Deskpro EP 401963-001 motherboard PCI: Remove __devinit from pcibios_get_irq_routing_table PCI: remove devinit from pci_read_bridge_bases PCI AER: fix warnings when PCIEAER=n
| * | | | PCI: irq and pci_ids patch for Intel TolapaiJason Gaston2007-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the Intel Tolapai LPC and SMBus Controller DID's. Signed-off-by: Jason Gaston <jason.d.gaston@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * | | | PCI AER: fix warnings when PCIEAER=nRandy Dunlap2007-09-11
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix warnings when CONFIG_PCIEAER=n: drivers/pci/pcie/portdrv_pci.c:105: warning: statement with no effect drivers/pci/pcie/portdrv_pci.c:226: warning: statement with no effect drivers/scsi/arcmsr/arcmsr_hba.c:352: warning: statement with no effect Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | | Merge branch 'master' of ↵Linus Torvalds2007-09-11
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 * 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: [INET_DIAG]: Fix oops in netlink_rcv_skb [IPv6]: Fix NULL pointer dereference in ip6_flush_pending_frames [NETFILTER]: Fix/improve deadlock condition on module removal netfilter [NETFILTER]: nf_conntrack_ipv4: fix "Frag of proto ..." messages [NET] DOC: Update networking/multiqueue.txt with correct information. [IPV6]: Freeing alive inet6 address [DECNET]: Fix interface address listing regression. [IPV4] devinet: show all addresses assigned to interface [NET]: Do not dereference iov if length is zero [TG3]: Workaround MSI bug on 5714/5780. [Bluetooth] Fix parameter list for event filter command [Bluetooth] Update security filter for Bluetooth 2.1 [Bluetooth] Add compat handling for timestamp structure [Bluetooth] Add missing stat.byte_rx counter modification
| * | | | [NETFILTER]: Fix/improve deadlock condition on module removal netfilterNeil Horman2007-09-11
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | So I've had a deadlock reported to me. I've found that the sequence of events goes like this: 1) process A (modprobe) runs to remove ip_tables.ko 2) process B (iptables-restore) runs and calls setsockopt on a netfilter socket, increasing the ip_tables socket_ops use count 3) process A acquires a file lock on the file ip_tables.ko, calls remove_module in the kernel, which in turn executes the ip_tables module cleanup routine, which calls nf_unregister_sockopt 4) nf_unregister_sockopt, seeing that the use count is non-zero, puts the calling process into uninterruptible sleep, expecting the process using the socket option code to wake it up when it exits the kernel 4) the user of the socket option code (process B) in do_ipt_get_ctl, calls ipt_find_table_lock, which in this case calls request_module to load ip_tables_nat.ko 5) request_module forks a copy of modprobe (process C) to load the module and blocks until modprobe exits. 6) Process C. forked by request_module process the dependencies of ip_tables_nat.ko, of which ip_tables.ko is one. 7) Process C attempts to lock the request module and all its dependencies, it blocks when it attempts to lock ip_tables.ko (which was previously locked in step 3) Theres not really any great permanent solution to this that I can see, but I've developed a two part solution that corrects the problem Part 1) Modifies the nf_sockopt registration code so that, instead of using a use counter internal to the nf_sockopt_ops structure, we instead use a pointer to the registering modules owner to do module reference counting when nf_sockopt calls a modules set/get routine. This prevents the deadlock by preventing set 4 from happening. Part 2) Enhances the modprobe utilty so that by default it preforms non-blocking remove operations (the same way rmmod does), and add an option to explicity request blocking operation. So if you select blocking operation in modprobe you can still cause the above deadlock, but only if you explicity try (and since root can do any old stupid thing it would like.... :) ). Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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