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2010-04-11Merge branch 'master' of /home/davem/src/GIT/linux-2.6/David S. Miller
2010-04-11Revert "tcp: Set CHECKSUM_UNNECESSARY in tcp_init_nondata_skb"David S. Miller
This reverts commit 2626419ad5be1a054d350786b684b41d23de1538. It causes regressions for people with IGB cards. Connection requests don't complete etc. The true cause of the issue is still not known, but we should sort this out in net-next-2.6 not net-2.6 Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-09Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: IB/mlx4: Check correct variable for allocation failure RDMA/nes: Correct cap.max_inline_data assignment in nes_query_qp() RDMA/cm: Set num_paths when manually assigning path records IB/cm: Fix device_create() return value check
2010-04-09Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6Linus Torvalds
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: [S390] Update default configuration. [S390] nss: add missing .previous statement to asm function [S390] increase default size of vmalloc area [S390] s390: disable change bit override [S390] fix io_return critical section cleanup [S390] sclp_async: potential buffer overflow [S390] arch/s390/kernel: Add missing unlock
2010-04-09Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: (34 commits) cfq-iosched: Fix the incorrect timeslice accounting with forced_dispatch loop: Update mtime when writing using aops block: expose the statistics in blkio.time and blkio.sectors for the root cgroup backing-dev: Handle class_create() failure Block: Fix block/elevator.c elevator_get() off-by-one error drbd: lc_element_by_index() never returns NULL cciss: unlock on error path cfq-iosched: Do not merge queues of BE and IDLE classes cfq-iosched: Add additional blktrace log messages in CFQ for easier debugging i2o: Remove the dangerous kobj_to_i2o_device macro block: remove 16 bytes of padding from struct request on 64bits cfq-iosched: fix a kbuild regression block: make CONFIG_BLK_CGROUP visible Remove GENHD_FL_DRIVERFS block: Export max number of segments and max segment size in sysfs block: Finalize conversion of block limits functions block: Fix overrun in lcm() and move it to lib vfs: improve writeback_inodes_wb() paride: fix off-by-one test drbd: fix al-to-on-disk-bitmap for 4k logical_block_size ...
2010-04-09Merge branch 'drm-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 * 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (29 commits) drm/nouveau: bail out of auxch transaction if we repeatedly recieve defers drm/nv50: implement gpio set/get routines drm/nv50: parse/use some more de-magiced parts of gpio table entries drm/nouveau: store raw gpio table entry in bios gpio structs drm/nv40: Init some tiling-related PGRAPH state. drm/nv50: Add NVA3 support in ctxprog/ctxvals generator. drm/nv50: another dodgy DP hack drm/nv50: punt hotplug irq handling out to workqueue drm/nv50: preserve an unknown SOR_MODECTRL value for DP encoders drm/nv50: Allow using the NVA3 new compute class. drm/nv50: cleanup properly if PDISPLAY init fails drm/nouveau: fixup the init failure paths some more drm/nv50: fix instmem init on IGPs if stolen mem crosses 4GiB mark drm/nv40: add LVDS table quirk for Dell Latitude D620 drm/nv40: rework lvds table parsing drm/nouveau: detect vram amount once, and save the value drm/nouveau: remove some unused members from drm_nouveau_private drm/nouveau: Make use of TTM busy_placements. drm/nv50: add more 0x100c80 flushy magic drm/nv50: fix fbcon when framebuffer above 4GiB mark ...
2010-04-09radix_tree_tag_get() is not as safe as the docs make out [ver #2]David Howells
radix_tree_tag_get() is not safe to use concurrently with radix_tree_tag_set() or radix_tree_tag_clear(). The problem is that the double tag_get() in radix_tree_tag_get(): if (!tag_get(node, tag, offset)) saw_unset_tag = 1; if (height == 1) { int ret = tag_get(node, tag, offset); may see the value change due to the action of set/clear. RCU is no protection against this as no pointers are being changed, no nodes are being replaced according to a COW protocol - set/clear alter the node directly. The documentation in linux/radix-tree.h, however, says that radix_tree_tag_get() is an exception to the rule that "any function modifying the tree or tags (...) must exclude other modifications, and exclude any functions reading the tree". The problem is that the next statement in radix_tree_tag_get() checks that the tag doesn't vary over time: BUG_ON(ret && saw_unset_tag); This has been seen happening in FS-Cache: https://www.redhat.com/archives/linux-cachefs/2010-April/msg00013.html To this end, remove the BUG_ON() from radix_tree_tag_get() and note in various comments that the value of the tag may change whilst the RCU read lock is held, and thus that the return value of radix_tree_tag_get() may not be relied upon unless radix_tree_tag_set/clear() and radix_tree_delete() are excluded from running concurrently with it. Reported-by: Romain DEGEZ <romain.degez@smartjog.com> Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-04-09slub: Fix kmem_ptr_validate() for non-kernel pointersPekka Enberg
As suggested by Linus, fix up kmem_ptr_validate() to handle non-kernel pointers more graciously. The patch changes kmem_ptr_validate() to use the newly introduced kern_ptr_validate() helper to check that a pointer is a valid kernel pointer before we attempt to convert it into a 'struct page'. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Matt Mackall <mpm@selenic.com> Cc: Nick Piggin <npiggin@suse.de> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Christoph Lameter <cl@linux-foundation.org> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-04-09slab: Generify kernel pointer validationPekka Enberg
As suggested by Linus, introduce a kern_ptr_validate() helper that does some sanity checks to make sure a pointer is a valid kernel pointer. This is a preparational step for fixing SLUB kmem_ptr_validate(). Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: David Rientjes <rientjes@google.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Matt Mackall <mpm@selenic.com> Cc: Nick Piggin <npiggin@suse.de> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-04-09Revert "memory-hotplug: add 0x prefix to HEX block_size_bytes"Linus Torvalds
This reverts commit ba168fc37dea145deeb8fa9e7e71c748d2e00d74. It changes user-visible sysfs interfaces, and breaks some existing user space applications which apparently rely on the fact that the output does not contain the "0x" prefix. Requested-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-04-09Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
2010-04-09Merge branches 'cma', 'misc', 'mlx4' and 'nes' into for-linusRoland Dreier
2010-04-09[S390] Update default configuration.Martin Schwidefsky
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-04-09[S390] nss: add missing .previous statement to asm functionHeiko Carstens
The savesys_ipl_nss asm function is put into the .init.text section however it is missing a ".previous" section which would restore the previous section. Luckily all functions in early.c are init functions so it doesn't matter currently. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-04-09[S390] increase default size of vmalloc areaMartin Schwidefsky
The default size of the vmalloc area is currently 1 GB. The memory resource controller uses about 10 MB of vmalloc space per gigabyte of memory. That turns a system with more than ~100 GB memory unbootable with the default vmalloc size. It costs us nothing to increase the default size to some more adequate value, e.g. 128 GB. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-04-09[S390] s390: disable change bit overrideChristian Borntraeger
commit 6a985c6194017de2c062916ad1cd00dee0302c40 ([S390] s390: use change recording override for kernel mapping) deactivated the change bit recording for the kernel mapping to improve the performance. This works most of the time, but there are cases (e.g. kernel runs in home space, futex atomic compare xcmg) where we modify user memory with the kernel mapping instead of the user mapping. Instead of fixing these cases, this patch just deactivates change bit override to avoid future problems with other kernel code that might use the kernel mapping for user memory. CC: stable@kernel.org Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-04-09[S390] fix io_return critical section cleanupMartin Schwidefsky
If a machine check interrupts the io interrupt handler on one of the instructions between io_return and io_leave the critical section cleanup code will move the return psw to io_work_loop. By doing that the switch from the asynchronous interrupt stack to the process stack is skipped. If e.g. TIF_NEED_RESCHED is set things break because the scheduler is called with the asynchronous interrupts stack. Moving the psw back to io_return instead fixes the problem. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-04-09[S390] sclp_async: potential buffer overflowDan Carpenter
"len" hasn't been properly range checked so we shouldn't use it as an array offset. This can only be written to by root but it would still be annoying to accidentally write more than 3 characters and corrupt your memory. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-04-09[S390] arch/s390/kernel: Add missing unlockJulia Lawall
In the default case the lock is not unlocked. The return is converted to a goto, to share the unlock at the end of the function. A simplified version of the semantic patch that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r exists@ expression E1; identifier f; @@ f (...) { <+... * spin_lock_irq (E1,...); ... when != E1 * return ...; ...+> } // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-04-09cfq-iosched: Fix the incorrect timeslice accounting with forced_dispatchDivyesh Shah
When CFQ dispatches requests forcefully due to a barrier or changing iosched, it runs through all cfqq's dispatching requests and then expires each queue. However, it does not activate a cfqq before flushing its IOs resulting in using stale values for computing slice_used. This patch fixes it by calling activate queue before flushing reuqests from each queue. This is useful mostly for barrier requests because when the iosched is changing it really doesnt matter if we have incorrect accounting since we're going to break down all structures anyway. We also now expire the current timeslice before moving on with the dispatch to accurately account slice used for that cfqq. Signed-off-by: Divyesh Shah<dpshah@google.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2010-04-09Merge remote branch 'nouveau/for-airlied' of ../drm-nouveau-next into drm-linusDave Airlie
* 'nouveau/for-airlied' of ../drm-nouveau-next: (21 commits) drm/nouveau: bail out of auxch transaction if we repeatedly recieve defers drm/nv50: implement gpio set/get routines drm/nv50: parse/use some more de-magiced parts of gpio table entries drm/nouveau: store raw gpio table entry in bios gpio structs drm/nv40: Init some tiling-related PGRAPH state. drm/nv50: Add NVA3 support in ctxprog/ctxvals generator. drm/nv50: another dodgy DP hack drm/nv50: punt hotplug irq handling out to workqueue drm/nv50: preserve an unknown SOR_MODECTRL value for DP encoders drm/nv50: Allow using the NVA3 new compute class. drm/nv50: cleanup properly if PDISPLAY init fails drm/nouveau: fixup the init failure paths some more drm/nv50: fix instmem init on IGPs if stolen mem crosses 4GiB mark drm/nv40: add LVDS table quirk for Dell Latitude D620 drm/nv40: rework lvds table parsing drm/nouveau: detect vram amount once, and save the value drm/nouveau: remove some unused members from drm_nouveau_private drm/nouveau: Make use of TTM busy_placements. drm/nv50: add more 0x100c80 flushy magic drm/nv50: fix fbcon when framebuffer above 4GiB mark ...
2010-04-09drm/nouveau: bail out of auxch transaction if we repeatedly recieve defersBen Skeggs
There's one known case where we never stop recieving DEFER, and loop here forever. Lets not do that.. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv50: implement gpio set/get routinesBen Skeggs
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv50: parse/use some more de-magiced parts of gpio table entriesBen Skeggs
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nouveau: store raw gpio table entry in bios gpio structsBen Skeggs
And use our own version of the GPIO table for the INIT_GPIO opcode. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv40: Init some tiling-related PGRAPH state.Francisco Jerez
Fixes garbled 3D on an nv46 card. Reported-by: Francesco Marella <francesco.marella@gmail.com> Signed-off-by: Francisco Jerez <currojerez@riseup.net> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv50: Add NVA3 support in ctxprog/ctxvals generator.Marcin Kościelnicki
Signed-off-by: Marcin Kościelnicki <koriakin@0x04.net> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv50: another dodgy DP hackBen Skeggs
Allows *some* DP cards to keep working in some corner cases that most people shouldn't hit. I hit it all the time with development, so this can stay for now. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv50: punt hotplug irq handling out to workqueueBen Skeggs
On DP outputs we'll likely end up running vbios init tables here, which may sleep. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv50: preserve an unknown SOR_MODECTRL value for DP encodersBen Skeggs
This value interacts with some registers we don't currently know how to program properly ourselves. The default of 5 that we were using matches what the VBIOS on early DP cards do, but later ones use 6, which would cause nouveau to program an incorrect mode on these chips. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv50: Allow using the NVA3 new compute class.Marcin Kościelnicki
Signed-off-by: Marcin Kościelnicki <koriakin@0x04.net> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv50: cleanup properly if PDISPLAY init failsBen Skeggs
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nouveau: fixup the init failure paths some moreBen Skeggs
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv50: fix instmem init on IGPs if stolen mem crosses 4GiB markBen Skeggs
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv40: add LVDS table quirk for Dell Latitude D620Ben Skeggs
Should fix: https://bugzilla.redhat.com/show_bug.cgi?id=505132 https://bugzilla.redhat.com/show_bug.cgi?id=543091 https://bugzilla.redhat.com/show_bug.cgi?id=530425 https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/ +bug/539730 Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv40: rework lvds table parsingBen Skeggs
All indications seem to be that the version 0x30 table should be handled the same way as 0x40 (as used on G80), at least for the parts that we currently try use. This commit cleans up the parsing to make it clearer about what we're actually trying to achieve, and unifies the 0x30/0x40 parsing. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nouveau: detect vram amount once, and save the valueBen Skeggs
As opposed to repeatedly reading the amount back from the GPU every time we need to know the VRAM size. We should now fail to load gracefully on detecting no VRAM, rather than something potentially messy happening. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nouveau: remove some unused members from drm_nouveau_privateBen Skeggs
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nouveau: Make use of TTM busy_placements.Francisco Jerez
Previously we were filling it the same as "placements", but in some cases there're valid alternatives that we were ignoring completely. Keeping a back-up memory type helps on several low-mem situations. Signed-off-by: Francisco Jerez <currojerez@riseup.net> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv50: add more 0x100c80 flushy magicBen Skeggs
Fixes the !vbo_fifo path in the 3D driver on certain chipsets. Still not really any good idea of what exactly the magic achieves, but it makes things work. While we're at it, in the PCIEGART path, flush on unbinding also. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv50: fix fbcon when framebuffer above 4GiB markBen Skeggs
This can't actually happen right now, but lets fix it anyway. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-09drm/nv50: Fix NEWCTX_DONE flag numberMarcin Kościelnicki
Signed-off-by: Marcin Kościelnicki <koriakin@0x04.net> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-04-08iwlwifi: need check for valid qos packet before freeWey-Yi Guy
For 4965, need to check it is valid qos frame before free, only valid QoS frame has the tid used to free the packets. Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-04-08loop: Update mtime when writing using aopsNikanth Karthikesan
Update mtime when writing to backing filesystem using the address space operations write_begin and write_end. Signed-off-by: Nikanth Karthikesan <knikanth@suse.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2010-04-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: not overwriting file_lock structure after GET_LK cifs: Fix a kernel BUG with remote OS/2 server (try #3) [CIFS] initialize nbytes at the beginning of CIFSSMBWrite() [CIFS] Add mmap for direct, nobrl cifs mount types
2010-04-08tcp: Set CHECKSUM_UNNECESSARY in tcp_init_nondata_skbDavid S. Miller
Back in commit 04a0551c87363f100b04d28d7a15a632b70e18e7 ("loopback: Drop obsolete ip_summed setting") we stopped setting CHECKSUM_UNNECESSARY in the loopback xmit. This is because such a setting was a lie since it implies that the checksum field of the packet is properly filled in. Instead what happens normally is that CHECKSUM_PARTIAL is set and skb->csum is calculated as needed. But this was only happening for TCP data packets (via the skb->ip_summed assignment done in tcp_sendmsg()). It doesn't happen for non-data packets like ACKs etc. Fix this by setting skb->ip_summed in the common non-data packet constructor. It already is setting skb->csum to zero. But this reminds us that we still have things like ip_output.c's ip_dev_loopback_xmit() which sets skb->ip_summed to the value CHECKSUM_UNNECESSARY, which Herbert's patch teaches us is not valid. So we'll have to address that at some point too. Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-08udp: fix for unicast RX path optimizationJorge Boncompte [DTI2]
Commits 5051ebd275de672b807c28d93002c2fb0514a3c9 and 5051ebd275de672b807c28d93002c2fb0514a3c9 ("ipv[46]: udp: optimize unicast RX path") broke some programs. After upgrading a L2TP server to 2.6.33 it started to fail, tunnels going up an down, after the 10th tunnel came up. My modified rp-l2tp uses a global unconnected socket bound to (INADDR_ANY, 1701) and one connected socket per tunnel after parameter negotiation. After ten sockets were open and due to mixed parameters to udp[46]_lib_lookup2() kernel started to drop packets. Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-08Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: libata: Fix accesses at LBA28 boundary (old bug, but nasty) (v2)
2010-04-08libata: Fix accesses at LBA28 boundary (old bug, but nasty) (v2)Mark Lord
Most drives from Seagate, Hitachi, and possibly other brands, do not allow LBA28 access to sector number 0x0fffffff (2^28 - 1). So instead use LBA48 for such accesses. This bug could bite a lot of systems, especially when the user has taken care to align partitions to 4KB boundaries. On misaligned systems, it is less likely to be encountered, since a 4KB read would end at 0x10000000 rather than at 0x0fffffff. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2010-04-08Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Fix sched_getaffinity()
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