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2007-04-02[PATCH] uml: fix unreasonably long udelayPaolo 'Blaisorblade' Giarrusso
Currently we have a confused udelay implementation. * __const_udelay does not accept usecs but xloops in i386 and x86_64 * our implementation requires usecs as arg * it gets a xloops count when called by asm/arch/delay.h Bugs related to this (extremely long shutdown times) where reported by some x86_64 users, especially using Device Mapper. To hit this bug, a compile-time constant time parameter must be passed - that's why UML seems to work most times. Fix this with a simple udelay implementation. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-01Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 4298/1: fix memory barriers for DMA coherent and SMP platforms [ARM] 4295/2: Fix error-handling in pxaficp_ir.c (version 2) [ARM] Fix __NR_kexec_load [ARM] Export dma_channel_active() [ARM] 4296/1: ixp4xx: compile fix [ARM] 4289/1: AT91: SAM9260 NAND flash timing
2007-04-01[ARM] 4298/1: fix memory barriers for DMA coherent and SMP platformsLennert Buytenhek
This patch: - Switches mb/rmb/wmb back to being full-blown DMBs on ARM SMP systems, since mb/rmb/wmb are required to order Normal memory accesses as well. - Enables the use of DMB and ISB on XSC3 (which is an ARMv5TE ISA core but conforms to the ARMv6 memory ordering model and supports the various ARMv6 barriers.) - Makes DMA coherent platforms (only ixp23xx at the moment) map mb/rmb/wmb to dmb(), as on DMA coherent platforms, DMA consistent mappings are done as Normal mappings, which are weakly ordered. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Acked-by: David Howells <dhowells@redhat.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-04-01[ARM] Fix __NR_kexec_loadRussell King
It's __NR_kexec_load, not __NR_sys_kexec_load Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-03-30[PATCH] uml: fix static linking for realPaolo 'Blaisorblade' Giarrusso
There was a typo in commit 7632fc8f809a97f9d82ce125e8e3e579390ce2e5, preventing it from working - 32bit binaries crashed hopelessly before the below fix and work perfectly now. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-30[ARM] 4296/1: ixp4xx: compile fixVladimir Barinov
Fix compilation fail for ixp4xx platforms for the case when CONFIG_IXP4XX_INDIRECT_PCI is set. That is due to the check_signature() is appeared in include/linux/io.h. Signed-off-by: Vladimir Barinov <vbarinov@ru.mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-03-29[MIPS] SMTC: Fix recursion in instant IPI replay code.Ralf Baechle
local_irq_restore -> raw_local_irq_restore -> irq_restore_epilog -> smtc_ipi_replay -> smtc_ipi_dq -> spin_unlock_irqrestore -> _spin_unlock_irqrestore -> local_irq_restore The recursion does abort when there is no more IPI queued for a CPU, so this isn't usually fatal which is why we got away with this for so long until this was discovered by code inspection. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-29[MIPS] MV64340: Add missing prototype for mv64340_irq_init().Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-29Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: [IFB]: Fix crash on input device removal [BNX2]: Fix link interrupt problem.
2007-03-29[POWERPC] qe: ucc_slow.guemr is in the wrong placeTimur Tabi
The definition of struct ucc_slow puts the guemr register immediately after the utpt register, when it should be at offset 0x90. This patch adds the missing 0x52-byte padding. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-03-29[IFB]: Fix crash on input device removalPatrick McHardy
The input_device pointer is not refcounted, which means the device may disappear while packets are queued, causing a crash when ifb passes packets with a stale skb->dev pointer to netif_rx(). Fix by storing the interface index instead and do a lookup where neccessary. Signed-off-by: Patrick McHardy <kaber@trash.net> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-03-29[PATCH] uml: fix pte bit collisionMiklos Szeredi
_PAGE_PROTNONE conflicts with the lowest bit of pgoff. This causes all sorts of weirdness when nonlinear mappings are used. Took me a good half day to track this down. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Acked-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-29[PATCH] x86_64 irq: Fix comments after changing IRQ0_VECTOR from 0x20 to 0x30Yinghai Lu
Signed-off-by: Yinghai Lu <yinghai.lu@amd.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-28Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [VIDEO]: Fix section mismatch in cg3.c [SPARC]: sparc64 gcc-4.2.0 20070317 -Werror failure [VIDEO] ffb: Fix two DAC handling bugs. [SPARC32]: Fix SMP build regression [DRM]: Delete sparc64 FFB driver code that never gets built.
2007-03-28Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6Linus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6: sh: Trivial fix for hp6xx build. sh: Fixup __cmpxchg() compile breakage with gcc4. sh: Kill bogus GCC4 symbol exports.
2007-03-28sh: Trivial fix for hp6xx build.Kristoffer Ericson
The IRQ3 define was removed when asm-sh/irq.h was cleaned up, this updates the hp6xx header to use the IRQ number directly. Signed-off-by: Kristoffer Ericson <kristoffer_e1@hotmail.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-03-28sh: Fixup __cmpxchg() compile breakage with gcc4.Paul Mundt
As reported by Manuel: When I build linux with GCC-4.x and enable CONFIG_CC_OPTIMIZE_FOR_SIZE linking fails with this error: LD .tmp_vmlinux1 kernel/built-in.o: In function '__cmpxchg_called_with_bad_pointer' make[1]: *** [.tmp_vmlinux1] Error 1 make: *** [_all] Error 2 This ended up being an inlining problem, fixed by explicitly including linux/compiler.h and grabbing the definitions from there. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-03-28Merge branch 'upstream-fixes' of ↵Jeff Garzik
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 into upstream-fixes
2007-03-27[PATCH] WE-22 : prevent information leak on 64 bitJean Tourrilhes
Johannes Berg discovered that kernel space was leaking to userspace on 64 bit platform. He made a first patch to fix that. This is an improved version of his patch. Signed-off-by: Jean Tourrilhes <jt@hpl.hp.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2007-03-27Merge git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvbLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb: V4L/DVB (5472): Isl6421: don't reference freed memory V4L/DVB (5441): Saa7146: Fix allocation of clipping memory V4L/DVB (5421): Fix suspend/resume in msp3400 and tuner V4L/DVB (5415): Msp_attach must return 0 if no msp3400 was found. V4L/DVB (5408): Fix SECAM handling on saa7115 V4L/DVB (5400): Core: fix several locking related problems V4L/DVB (5390): Radio: Fix error in Kbuild file V4L/DVB (5332): Ir_rc5_timer_end decoder lockup fix
2007-03-27Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-blockLinus Torvalds
* 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block: Export __splice_from_pipe() 2/2 splice: dont readpage 1/2 splice: dont steal make elv_register() output atomic block: blk_max_pfn is somtimes wrong
2007-03-27[PATCH] ipcns: fix !CONFIG_IPC_NS behaviorSerge E. Hallyn
When CONFIG_IPC_NS=n, clone(CLONE_NEWIPC) claims success, but did not actually clone a new IPC namespace. Fix this to return -EINVAL so the caller knows his request was denied. Signed-off-by: Serge E. Hallyn <serue@us.ibm.com> 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>
2007-03-27[PATCH] uml: fix static linkingJeff Dike
During a static link, ld has started putting a .note section in the .uml.setup.init section. This has the result that the UML setups begin with 32 bytes of garbage and UML crashes immediately on boot. This patch creates a specific .note section for ld to drop this stuff into. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-27[PATCH] utsns: fix !CONFIG_UTS_NS behaviorSerge E. Hallyn
When CONFIG_UTS_NS=n, clone(CLONE_NEWUTS) quietly refuses. So correctly does not unshare a new uts namespace, but also does not return -EINVAL. Fix this to return -EINVAL so the caller knows his request was denied. Signed-off-by: Serge E. Hallyn <serue@us.ibm.com> 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>
2007-03-27[PATCH] tty: minor merge correctionAlan Cox
Its now used.. because we added the new definitions so enabled all the goodies on i386 Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-27[PATCH] uml: fix epollJeff Dike
UML/x86_64 needs the same packing of struct epoll_event as x86_64. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-27V4L/DVB (5441): Saa7146: Fix allocation of clipping memoryOliver Endriss
Olaf Hering pointed out that SAA7146_CLIPPING_MEM would become very large for PAGE_SIZE > 4K. In fact, the number of clipping windows is limited to 16, and calculate_clipping_registers_rect() does not use more than 256 bytes. SAA7146_CLIPPING_MEM adjusted accordingly. Thanks-to: Olaf Hering <olaf@aepfle.de> Acked-by: Michael Hunold <hunold@linuxtv.org> Signed-off-by: Oliver Endriss <o.endriss@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2007-03-27[SPARC]: sparc64 gcc-4.2.0 20070317 -Werror failureMikael Pettersson
Compiling 2.6.21-rc5 with gcc-4.2.0 20070317 (prerelease) for sparc64 fails as follows: gcc -Wp,-MD,arch/sparc64/kernel/.time.o.d -nostdinc -isystem /home/mikpe/pkgs/linux-sparc64/gcc-4.2.0/lib/gcc/sparc64-unknown-linux-gnu/4.2.0/include -D__KERNEL__ -Iinclude -include include/linux/autoconf.h -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Os -m64 -pipe -mno-fpu -mcpu=ultrasparc -mcmodel=medlow -ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare -Wa,--undeclared-regs -fomit-frame-pointer -fno-stack-protector -Wdeclaration-after-statement -Wno-pointer-sign -Werror -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(time)" -D"KBUILD_MODNAME=KBUILD_STR(time)" -c -o arch/sparc64/kernel/time.o arch/sparc64/kernel/time.c cc1: warnings being treated as errors arch/sparc64/kernel/time.c: In function 'kick_start_clock': arch/sparc64/kernel/time.c:559: warning: overflow in implicit constant conversion make[1]: *** [arch/sparc64/kernel/time.o] Error 1 make: *** [arch/sparc64/kernel] Error 2 gcc gets unhappy when the MSTK_SET macro's u8 __val variable is updated with &= ~0xff (MSTK_YEAR_MASK). Making the constant unsigned fixes the problem. [ I fixed up the sparc32 side as well -DaveM ] Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-03-27Export __splice_from_pipe()Mark Fasheh
Ocfs2 wants to implement it's own splice write actor so that it can better manage cluster / page locks. This lets us re-use the rest of splice write while only providing our own code where it's actually important. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-03-26Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: [SUNGEM]: Fix MAC address setting when interface is up. [IPV4] fib_trie: Document locking. [NET]: Correct accept(2) recovery after sock_attach_fd() [PPP]: Don't leak an sk_buff on interface destruction. [NET_SCHED]: Fix ingress locking [NET_SCHED]: cls_basic: fix NULL pointer dereference [DCCP]: make dccp_write_xmit_timer() static again [TG3]: Update version and reldate. [TG3]: Exit irq handler during chip reset. [TG3]: Eliminate the unused TG3_FLAG_SPLIT_MODE flag. [IPV6]: Fix routing round-robin locking. [DECNet] fib: Fix out of bound access of dn_fib_props[] [IPv4] fib: Fix out of bound access of fib_props[] [NET] AX.25 Kconfig and docs updates and fixes [NET]: Fix neighbour destructor handling. [NET]: Fix fib_rules compatibility breakage [SCTP]: Update SCTP Maintainers entry [NET]: remove unused header file: drivers/net/wan/lmc/lmc_media.h
2007-03-26Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [S390] zcrypt: Fix ap_poll_requests counter in lost requests error path. [S390] zcrypt: Fix possible dead lock in AP bus module. [S390] cio: Device status validity. [S390] kprobes: Align probe address. [S390] Fix TCP/UDP pseudo header checksum computation. [S390] dasd: Work around gcc bug.
2007-03-26[PATCH] Add const to pointer qualifiers for __chk_user_ptr and __chk_io_ptr.Russ Cox
Change prototypes for __chk_user_ptr and __chk_io_ptr to take const void* instead of void*, so that code can pass "const void *" to them. (Right now sparse does not warn about passing const void* to void* functions, but that is a separate bug that I believe Josh is working on, and once sparse does check this, the changed prototypes will be necessary.) Signed-off-by: Russ Cox <rsc@swtch.com> Signed-off-by: Josh Triplett <josh@freedesktop.org> Acked-by: Christopher Li <sparse@chrisli.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-26ide: use correct IDE error recoverySuleiman Souhlal
IDE error recovery is using IDLE IMMEDIATE if the drive is busy or has DRQ set. This violates the ATA spec (can only send IDLE IMMEDIATE when drive is not busy) and really hoses up some drives (modern drives will not be able to recover using this error handling). The correct thing to do is issue a SRST followed by a SET FEATURES command. This is what Western Digital recommends for error recovery and what Western Digital says Windows does.  It also does not violate the ATA spec as far as I can tell. Bart: * port the patch over the current tree * undo the recalibration code removal * send SET FEATURES command after checking for good drive status * don't check whether the current request is of REQ_TYPE_ATA_{CMD,TASK} type because we need to send SET FEATURES before handling any requests * some pre-ATA4 drives require INITIALIZE DEVICE PARAMETERS command before other commands (except IDENTIFY) so send SET FEATURES only if there are no pending drive->special requests * update comments and patch description * any bugs introduced by this patch are mine and not Suleiman's :-) Signed-off-by: Suleiman Souhlal <suleiman@google.com> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-03-26[S390] Fix TCP/UDP pseudo header checksum computation.Heiko Carstens
git commit f994aae1bd8e4813d59a2ed64d17585fe42d03fc changed the function declaration of csum_tcpudp_nofold. Argument types were changed from unsigned long to __be32 (unsigned int). Therefore we lost the implicit type conversion that zeroed the upper half of the registers that are used to pass parameters. Since the inline assembly relied on this we ended up adding random values and wrong checksums were created. Showed only up on machines with more than 4GB since gcc produced code where the registers that are used to pass 'saddr' and 'daddr' previously contained addresses before calling this function. Fix this by using 32 bit arithmetics and convert code to C, since gcc produces better code than these hand-optimized versions. Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2007-03-25[IPV6]: Fix routing round-robin locking.David S. Miller
As per RFC2461, section 6.3.6, item #2, when no routers on the matching list are known to be reachable or probably reachable we do round robin on those available routes so that we make sure to probe as many of them as possible to detect when one becomes reachable faster. Each routing table has a rwlock protecting the tree and the linked list of routes at each leaf. The round robin code executes during lookup and thus with the rwlock taken as a reader. A small local spinlock tries to provide protection but this does not work at all for two reasons: 1) The round-robin list manipulation, as coded, goes like this (with read lock held): walk routes finding head and tail spin_lock(); rotate list using head and tail spin_unlock(); While one thread is rotating the list, another thread can end up with stale values of head and tail and then proceed to corrupt the list when it gets the lock. This ends up causing the OOPS in fib6_add() later onthat many people have been hitting. 2) All the other code paths that run with the rwlock held as a reader do not expect the list to change on them, they expect it to remain completely fixed while they hold the lock in that way. So, simply stated, it is impossible to implement this correctly using a manipulation of the list without violating the rwlock locking semantics. Reimplement using a per-fib6_node round-robin pointer. This way we don't need to manipulate the list at all, and since the round-robin pointer can only ever point to real existing entries we don't need to perform any locking on the changing of the round-robin pointer itself. We only need to reset the round-robin pointer to NULL when the entry it is pointing to is removed. The idea is from Thomas Graf and it is very similar to how this was implemented before the advanced router selection code when in. Signed-off-by: David S. Miller <davem@davemloft.net>
2007-03-25[NET]: Fix neighbour destructor handling.Alexey Kuznetsov
->neigh_destructor() is killed (not used), replaced with ->neigh_cleanup(), which is called when neighbor entry goes to dead state. At this point everything is still valid: neigh->dev, neigh->parms etc. The device should guarantee that dead neighbor entries (neigh->dead != 0) do not get private part initialized, otherwise nobody will cleanup it. I think this is enough for ipoib which is the only user of this thing. Initialization private part of neighbor entries happens in ipib start_xmit routine, which is not reached when device is down. But it would be better to add explicit test for neigh->dead in any case. Signed-off-by: David S. Miller <davem@davemloft.net>
2007-03-25[NET]: Fix fib_rules compatibility breakageThomas Graf
Based upon a patch from Patrick McHardy. The fib_rules netlink attribute policy introduced in 2.6.19 broke userspace compatibilty. When specifying a rule with "from all" or "to all", iproute adds a zero byte long netlink attribute, but the policy requires all addresses to have a size equal to sizeof(struct in_addr)/sizeof(struct in6_addr), resulting in a validation error. Check attribute length of FRA_SRC/FRA_DST in the generic framework by letting the family specific rules implementation provide the length of an address. Report an error if address length is non zero but no address attribute is provided. Fix actual bug by checking address length for non-zero instead of relying on availability of attribute. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-03-24Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 4278/1: configure pxa27x I2C SCL as "input" [ARM] 4272/1: Missing symbol h1940_pm_return fix [ARM] 4235/1: ns9xxx: declare the clock functions as "const" [ARM] 4271/1: iop32x: fix ep80219 detection (support iq80219 platforms) [ARM] 4270/2: mach-s3c2443/irq.c off by one error in dma irqs
2007-03-24[ARM] 4278/1: configure pxa27x I2C SCL as "input"Guennadi Liakhovetski
It has been reported by Julian Deng that configuring the pxa27x i2c SCL line as output generates a short negative pulse on it during the call to pxa_gpio_mode(GPIO117_I2CSCL_MD); as it first switches it to output and then configures it for the alternate function. The SCL line is in fact bidirectional and can also be configured as 117 | GPIO_ALT_FN_1_IN, in which case the pulse is not generated. This is exactly what this patch does. Author: Julian Deng <dengtj@sitek.cn> Signed-off-by: G. Liakhovetski <gl@dsa-ac.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-03-24[MIPS] SB1250: Fix bugs/warnings by creative use of volatile.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-24[MIPS] ARC: Fix warning.Ralf Baechle
The missing cast did result a warning when calling an 32-bit ARC firmware function that takes 5 arguments where the 5th argument is a pointer from a 64-bit kernel. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-24[MIPS] Implement flush_anon_page().Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-24[MIPS] Fix pipeline hazard.Ralf Baechle
In the the sequence: ei .. mfc0 $x, $status the mfc0 may not see the SR_IE bit set. This was a deliberate bug in the kernel code because we knew this was a safe thing to do on all R2 silicon so far but new silicon is changing this. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-24[MIPS] Make MIPS udelay() preempt safe under DEBUG_PREEMPTDeepak Saxena
Signed-off-by: Manish Lachwani <mlachwani@mvista.com> Signed-off-by: Deepak Saxena <dsaxena@mvista.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-24[MIPS] Always use virt_to_phys() when translating kernel addressesFranck Bui-Huu
This patch fixes two places where we used plain 'x - PAGE_OFFSET' to achieve virtual to physical address convertions. This type of convertion is no more allowed since commit 6f284a2ce7b8bc49cb8455b1763357897a899abb. Reported-by: Maxime Bizon <mbizon@freebox.fr> Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com> [Build fixes for machines that don't use the generic dma-coherence.h] Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-23[PATCH] i386: clear segment register padding in core dumpsRoland McGrath
The segment register slots in struct pt_regs are padded to 32 bits. Some of these are stored with instructions like "pushl %es", which leaves the high 16 bits as they were. So the high bits of these fields in struct pt_regs contain kernel stack garbage. These bits are ignored by everything and never leak to user space, except in core dumps. The user struct pt_regs is always at the base of the thread's kernel stack and so it seems unlikely the information that leaks from here is ever worthwhile so as to be a security concern, but I'm not sure about that. It has been this way for ages; userland consumers of core dumps all mask off these high bits themselves. So it is not urgent. This change masks off the padding bits of the segment register slots in core dumps. ptrace already masks off these high bits, so this makes the values in core dumps consistent with what ptrace would report just before the process died. As I read the processor manuals, the cs and ss values will always be padded with zero bits rather than stack garbage. But unlike "pushl %es", this is not simple to test with a userland program. So I added the two instructions rather than wonder if they are really never necessary. I think that x86_64 does not have this problem (for either 32-bit or 64-bit processes). It only uses "mov" instructions from segment registers, which zero-extend. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-23x86-64: add "local_apic_timer_c2_ok" here tooLinus Torvalds
Needed for any architecture that claims ARCH_APICTIMER_STOPS_ON_C3, not just i386. I'm hoping Thomas will clean this up a bit later.. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-23[PATCH] i386: add command line option "local_apic_timer_c2_ok"Thomas Gleixner
It turned out that it is almost impossible to trust ACPI, BIOS & Co. regarding the C states. This was the reason to switch the local apic timer off in C2 state already. OTOH there are sane and well behaving systems, which get punished by that decision. Allow the user to confirm that the local apic timer is trustworthy in C2 state. This keeps the default behaviour on the safe side. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-22Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: ACPI: IA64: fix %ll build warnings ACPI: IA64: fix allnoconfig build ACPI: Only use IPI on known broken machines (AMD, Dothan/BaniasPentium M) ACPI: ibm-acpi: allow module to load when acpi notifiers can't be set (v2) ACPI: parse 2nd MADT by default ACPICA: revert "acpi_serialize" changes sony-laptop: MAINTAINERS fix entry, add L: and W: ACPI: resolve HP nx6125 S3 immediate wakeup regression ACPI: Add support to parse 2nd MADT
2007-03-22Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] Bypass hcall stats until cpu features have run [POWERPC] Avoid hypervisor statistics calculation in real mode [POWERPC] Fix atomicity of TIF update in flush_thread()