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2012-07-14fs: add nd_jump_linkChristoph Hellwig1-0/+2
Add a helper that abstracts out the jump to an already parsed struct path from ->follow_link operation from procfs. Not only does this clean up the code by moving the two sides of this game into a single helper, but it also prepares for making struct nameidata private to namei.c Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14get rid of kern_path_parent()Al Viro1-1/+1
all callers want the same thing, actually - a kinda-sorta analog of kern_path_create(). I.e. they want parent vfsmount/dentry (with ->i_mutex held, to make sure the child dentry is still their child) + the child dentry. Signed-off-by Al Viro <viro@zeniv.linux.org.uk>
2012-07-14don't pass nameidata * to vfs_create()Al Viro1-1/+1
all we want is a boolean flag, same as the method gets now Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14don't pass nameidata to ->create()Al Viro1-1/+1
boolean "does it have to be exclusive?" flag is passed instead; Local filesystem should just ignore it - the object is guaranteed not to be there yet. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14stop passing nameidata to ->lookup()Al Viro1-2/+2
Just the flags; only NFS cares even about that, but there are legitimate uses for such argument. And getting rid of that completely would require splitting ->lookup() into a couple of methods (at least), so let's leave that alone for now... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14stop passing nameidata * to ->d_revalidate()Al Viro1-1/+1
Just the lookup flags. Die, bastard, die... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14make finish_no_open() return intAl Viro1-1/+1
namely, 1 ;-) That's what we want to return from ->atomic_open() instances after finish_no_open(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14kill struct opendataAl Viro1-6/+5
Just pass struct file *. Methods are happier that way... There's no need to return struct file * from finish_open() now, so let it return int. Next: saner prototypes for parts in namei.c Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14make ->atomic_open() return intAl Viro1-3/+3
Change of calling conventions: old new NULL 1 file 0 ERR_PTR(-ve) -ve Caller *knows* that struct file *; no need to return it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14->atomic_open() prototype change - pass int * instead of bool *Al Viro1-2/+7
... and let finish_open() report having opened the file via that sucker. Next step: don't modify od->filp at all. [AV: FILE_CREATE was already used by cifs; Miklos' fix folded] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14vfs: remove open intents from nameidataMiklos Szeredi1-14/+0
All users of open intents have been converted to use ->atomic_{open,create}. This patch gets rid of nd->intent.open and related infrastructure. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14nfs: clean up ->create in nfs_rpc_opsMiklos Szeredi1-1/+1
Don't pass nfs_open_context() to ->create(). Only the NFS4 implementation needed that and only because it wanted to return an open file using open intents. That task has been replaced by ->atomic_open so it is not necessary anymore to pass the context to the create rpc operation. Despite nfs4_proc_create apparently being okay with a NULL context it Oopses somewhere down the call chain. So allocate a context here. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> CC: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14vfs: add i_op->atomic_open()Miklos Szeredi1-0/+7
Add a new inode operation which is called on the last component of an open. Using this the filesystem can look up, possibly create and open the file in one atomic operation. If it cannot perform this (e.g. the file type turned out to be wrong) it may signal this by returning NULL instead of an open struct file pointer. i_op->atomic_open() is only called if the last component is negative or needs lookup. Handling cached positive dentries here doesn't add much value: these can be opened using f_op->open(). If the cached file turns out to be invalid, the open can be retried, this time using ->atomic_open() with a fresh dentry. For now leave the old way of using open intents in lookup and revalidate in place. This will be removed once all the users are converted. David Howells noticed that if ->atomic_open() opens the file but does not create it, handle_truncate() will be called on it even if it is not a regular file. Fix this by checking the file type in this case too. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14vfs: switch i_dentry/d_alias to hlistAl Viro2-2/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14Merge branch 'timers-urgent-for-linus' of ↵Linus Torvalds1-1/+9
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull the leap second fixes from Thomas Gleixner: "It's a rather large series, but well discussed, refined and reviewed. It got a massive testing by John, Prarit and tip. In theory we could split it into two parts. The first two patches f55a6faa3843: hrtimer: Provide clock_was_set_delayed() 4873fa070ae8: timekeeping: Fix leapsecond triggered load spike issue are merely preventing the stuff loops forever issues, which people have observed. But there is no point in delaying the other 4 commits which achieve full correctness into 3.6 as they are tagged for stable anyway. And I rather prefer to have the full fixes merged in bulk than a "prevent the observable wreckage and deal with the hidden fallout later" approach." * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: hrtimer: Update hrtimer base offsets each hrtimer_interrupt timekeeping: Provide hrtimer update function hrtimers: Move lock held region in hrtimer_interrupt() timekeeping: Maintain ktime_t based offsets for hrtimers timekeeping: Fix leapsecond triggered load spike issue hrtimer: Provide clock_was_set_delayed()
2012-07-12Merge branch 'akpm' (Andrew's patch-bomb)Linus Torvalds3-4/+7
Merge random patches from Andrew Morton. * Merge emailed patches from Andrew Morton <akpm@linux-foundation.org>: (32 commits) memblock: free allocated memblock_reserved_regions later mm: sparse: fix usemap allocation above node descriptor section mm: sparse: fix section usemap placement calculation xtensa: fix incorrect memset shmem: cleanup shmem_add_to_page_cache shmem: fix negative rss in memcg memory.stat tmpfs: revert SEEK_DATA and SEEK_HOLE drivers/rtc/rtc-twl.c: fix threaded IRQ to use IRQF_ONESHOT fat: fix non-atomic NFS i_pos read MAINTAINERS: add OMAP CPUfreq driver to OMAP Power Management section sgi-xp: nested calls to spin_lock_irqsave() fs: ramfs: file-nommu: add SetPageUptodate() drivers/rtc/rtc-mxc.c: fix irq enabled interrupts warning mm/memory_hotplug.c: release memory resources if hotadd_new_pgdat() fails h8300/uaccess: add mising __clear_user() h8300/uaccess: remove assignment to __gu_val in unhandled case of get_user() h8300/time: add missing #include <asm/irq_regs.h> h8300/signal: fix typo "statis" h8300/pgtable: add missing #include <asm-generic/pgtable.h> drivers/rtc/rtc-ab8500.c: ensure correct probing of the AB8500 RTC when Device Tree is enabled ...
2012-07-12memblock: free allocated memblock_reserved_regions laterYinghai Lu1-3/+1
memblock_free_reserved_regions() calls memblock_free(), but memblock_free() would double reserved.regions too, so we could free the old range for reserved.regions. Also tj said there is another bug which could be related to this. | I don't think we're saving any noticeable | amount by doing this "free - give it to page allocator - reserve | again" dancing. We should just allocate regions aligned to page | boundaries and free them later when memblock is no longer in use. in that case, when DEBUG_PAGEALLOC, will get panic: memblock_free: [0x0000102febc080-0x0000102febf080] memblock_free_reserved_regions+0x37/0x39 BUG: unable to handle kernel paging request at ffff88102febd948 IP: [<ffffffff836a5774>] __next_free_mem_range+0x9b/0x155 PGD 4826063 PUD cf67a067 PMD cf7fa067 PTE 800000102febd160 Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC CPU 0 Pid: 0, comm: swapper Not tainted 3.5.0-rc2-next-20120614-sasha #447 RIP: 0010:[<ffffffff836a5774>] [<ffffffff836a5774>] __next_free_mem_range+0x9b/0x155 See the discussion at https://lkml.org/lkml/2012/6/13/469 So try to allocate with PAGE_SIZE alignment and free it later. Reported-by: Sasha Levin <levinsasha928@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-07-12mm: sparse: fix usemap allocation above node descriptor sectionYinghai Lu1-0/+5
After commit f5bf18fa22f8 ("bootmem/sparsemem: remove limit constraint in alloc_bootmem_section"), usemap allocations may easily be placed outside the optimal section that holds the node descriptor, even if there is space available in that section. This results in unnecessary hotplug dependencies that need to have the node unplugged before the section holding the usemap. The reason is that the bootmem allocator doesn't guarantee a linear search starting from the passed allocation goal but may start out at a much higher address absent an upper limit. Fix this by trying the allocation with the limit at the section end, then retry without if that fails. This keeps the fix from f5bf18fa22f8 of not panicking if the allocation does not fit in the section, but still makes sure to try to stay within the section at first. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Cc: <stable@vger.kernel.org> [3.3.x, 3.4.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-07-12memory hotplug: fix invalid memory access caused by stale kswapd pointerJiang Liu1-1/+1
kswapd_stop() is called to destroy the kswapd work thread when all memory of a NUMA node has been offlined. But kswapd_stop() only terminates the work thread without resetting NODE_DATA(nid)->kswapd to NULL. The stale pointer will prevent kswapd_run() from creating a new work thread when adding memory to the memory-less NUMA node again. Eventually the stale pointer may cause invalid memory access. An example stack dump as below. It's reproduced with 2.6.32, but latest kernel has the same issue. BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffff81051a94>] exit_creds+0x12/0x78 PGD 0 Oops: 0000 [#1] SMP last sysfs file: /sys/devices/system/memory/memory391/state CPU 11 Modules linked in: cpufreq_conservative cpufreq_userspace cpufreq_powersave acpi_cpufreq microcode fuse loop dm_mod tpm_tis rtc_cmos i2c_i801 rtc_core tpm serio_raw pcspkr sg tpm_bios igb i2c_core iTCO_wdt rtc_lib mptctl iTCO_vendor_support button dca bnx2 usbhid hid uhci_hcd ehci_hcd usbcore sd_mod crc_t10dif edd ext3 mbcache jbd fan ide_pci_generic ide_core ata_generic ata_piix libata thermal processor thermal_sys hwmon mptsas mptscsih mptbase scsi_transport_sas scsi_mod Pid: 7949, comm: sh Not tainted 2.6.32.12-qiuxishi-5-default #92 Tecal RH2285 RIP: 0010:exit_creds+0x12/0x78 RSP: 0018:ffff8806044f1d78 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff880604f22140 RCX: 0000000000019502 RDX: 0000000000000000 RSI: 0000000000000202 RDI: 0000000000000000 RBP: ffff880604f22150 R08: 0000000000000000 R09: ffffffff81a4dc10 R10: 00000000000032a0 R11: ffff880006202500 R12: 0000000000000000 R13: 0000000000c40000 R14: 0000000000008000 R15: 0000000000000001 FS: 00007fbc03d066f0(0000) GS:ffff8800282e0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000000 CR3: 000000060f029000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process sh (pid: 7949, threadinfo ffff8806044f0000, task ffff880603d7c600) Stack: ffff880604f22140 ffffffff8103aac5 ffff880604f22140 ffffffff8104d21e ffff880006202500 0000000000008000 0000000000c38000 ffffffff810bd5b1 0000000000000000 ffff880603d7c600 00000000ffffdd29 0000000000000003 Call Trace: __put_task_struct+0x5d/0x97 kthread_stop+0x50/0x58 offline_pages+0x324/0x3da memory_block_change_state+0x179/0x1db store_mem_state+0x9e/0xbb sysfs_write_file+0xd0/0x107 vfs_write+0xad/0x169 sys_write+0x45/0x6e system_call_fastpath+0x16/0x1b Code: ff 4d 00 0f 94 c0 84 c0 74 08 48 89 ef e8 1f fd ff ff 5b 5d 31 c0 41 5c c3 53 48 8b 87 20 06 00 00 48 89 fb 48 8b bf 18 06 00 00 <8b> 00 48 c7 83 18 06 00 00 00 00 00 00 f0 ff 0f 0f 94 c0 84 c0 RIP exit_creds+0x12/0x78 RSP <ffff8806044f1d78> CR2: 0000000000000000 [akpm@linux-foundation.org: add pglist_data.kswapd locking comments] Signed-off-by: Xishi Qiu <qiuxishi@huawei.com> Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Mel Gorman <mgorman@suse.de> Acked-by: David Rientjes <rientjes@google.com> Reviewed-by: Minchan Kim <minchan@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-07-12timekeeping: Provide hrtimer update functionThomas Gleixner1-0/+1
To finally fix the infamous leap second issue and other race windows caused by functions which change the offsets between the various time bases (CLOCK_MONOTONIC, CLOCK_REALTIME and CLOCK_BOOTTIME) we need a function which atomically gets the current monotonic time and updates the offsets of CLOCK_REALTIME and CLOCK_BOOTTIME with minimalistic overhead. The previous patch which provides ktime_t offsets allows us to make this function almost as cheap as ktime_get() which is going to be replaced in hrtimer_interrupt(). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Prarit Bhargava <prarit@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: John Stultz <johnstul@us.ibm.com> Link: http://lkml.kernel.org/r/1341960205-56738-7-git-send-email-johnstul@us.ibm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-07-12hrtimer: Provide clock_was_set_delayed()John Stultz1-1/+8
clock_was_set() cannot be called from hard interrupt context because it calls on_each_cpu(). For fixing the widely reported leap seconds issue it is necessary to call it from hard interrupt context, i.e. the timer tick code, which does the timekeeping updates. Provide a new function which denotes it in the hrtimer cpu base structure of the cpu on which it is called and raise the hrtimer softirq. We then execute the clock_was_set() notificiation from softirq context in run_hrtimer_softirq(). The hrtimer softirq is rarely used, so polling the flag there is not a performance issue. [ tglx: Made it depend on CONFIG_HIGH_RES_TIMERS. We really should get rid of all this ifdeffery ASAP ] Signed-off-by: John Stultz <johnstul@us.ibm.com> Reported-by: Jan Engelhardt <jengelh@inai.de> Reviewed-by: Ingo Molnar <mingo@kernel.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Prarit Bhargava <prarit@redhat.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/1341960205-56738-2-git-send-email-johnstul@us.ibm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-07-11Merge tag 'usb-3.5-rc6' of ↵Linus Torvalds1-2/+0
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB fixes from Greg Kroah-Hartman: "Here are a few fixes and new device ids for the 3.5-rc6 tree. The PCI changes resolve a long-standing issue with resuming some EHCI controllers. It has been acked by the PCI maintainer, and he asked for it to go through my USB tree instead of his. The xhci patches also resolve a number of reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>" * tag 'usb-3.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: PCI: EHCI: fix crash during suspend on ASUS computers USB: cdc-wdm: fix lockup on error in wdm_read USB: metro-usb: fix tty_flip_buffer_push use USB: option: Add MEDIATEK product ids USB: option: add ZTE MF60 xhci: Fix hang on back-to-back Set TR Deq Ptr commands. usb: Add support for root hub port status CAS
2012-07-11Merge tag 'fixes-for-v3.5' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull GPIO fixes from Linus Walleij: "Yes, this is a *LATE* GPIO pull request with fixes for v3.5. Grant moved across the planet and accidentally fell off the grid, so he asked me to take over the GPIO merges for a while 10 days ago. Since then I went over the archives and collected this pile of fixes, and pulled two of them from the TI maintainer Kevin Hilman. Then waited for them to at least hit linux-next once or twice." GPIO fixes for v3.5: - Invalid context restore on bank 0 for OMAP driver in runtime suspend/resume cycle - Check for NULL platform data in sta-2x11 driver - Constrain selection of the V1 MSM GPIO driver to applicable platforms (Kconfig issue) - Make sure the correct output value is set in the wm8994 driver - Export devm_gpio_request_one() so it can be used in modules. Apparently some in-kernel modules can be configured to use this leading to breakage. - Check that the GPIO is valid in the lantiq driver - Fix the flag bits introduced for v3.5, so they don't overlap - Fix a device tree intialization bug for imx21-compatible devices - Carry over the OF node to the TPS65910 GPIO chip struct * tag 'fixes-for-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio: tps65910: initialize of_node of gpio_chip gpio/mxc: make irqs work for fsl,imx21-gpio devices gpio: fix bits conflict for gpio flags mips: pci-lantiq: Fix check for valid gpio gpio: export devm_gpio_request_one gpiolib: wm8994: Pay attention to the value set when enabling as output gpio/msm_v1: CONFIG_GPIO_MSM_V1 is only available on three SoCs gpio-sta2x11: don't use pdata if null gpio/omap: fix invalid context restore of gpio bank-0 gpio/omap: fix irq loss while in idle with debounce on
2012-07-10PCI: EHCI: fix crash during suspend on ASUS computersAlan Stern1-2/+0
Quite a few ASUS computers experience a nasty problem, related to the EHCI controllers, when going into system suspend. It was observed that the problem didn't occur if the controllers were not put into the D3 power state before starting the suspend, and commit 151b61284776be2d6f02d48c23c3625678960b97 (USB: EHCI: fix crash during suspend on ASUS computers) was created to do this. It turned out this approach messed up other computers that didn't have the problem -- it prevented USB wakeup from working. Consequently commit c2fb8a3fa25513de8fedb38509b1f15a5bbee47b (USB: add NO_D3_DURING_SLEEP flag and revert 151b61284776be2) was merged; it reverted the earlier commit and added a whitelist of known good board names. Now we know the actual cause of the problem. Thanks to AceLan Kao for tracking it down. According to him, an engineer at ASUS explained that some of their BIOSes contain a bug that was added in an attempt to work around a problem in early versions of Windows. When the computer goes into S3 suspend, the BIOS tries to verify that the EHCI controllers were first quiesced by the OS. Nothing's wrong with this, but the BIOS does it by checking that the PCI COMMAND registers contain 0 without checking the controllers' power state. If the register isn't 0, the BIOS assumes the controller needs to be quiesced and tries to do so. This involves making various MMIO accesses to the controller, which don't work very well if the controller is already in D3. The end result is a system hang or memory corruption. Since the value in the PCI COMMAND register doesn't matter once the controller has been suspended, and since the value will be restored anyway when the controller is resumed, we can work around the BIOS bug simply by setting the register to 0 during system suspend. This patch (as1590) does so and also reverts the second commit mentioned above, which is now unnecessary. In theory we could do this for every PCI device. However to avoid introducing new problems, the patch restricts itself to EHCI host controllers. Finally the affected systems can suspend with USB wakeup working properly. Reference: https://bugzilla.kernel.org/show_bug.cgi?id=37632 Reference: https://bugzilla.kernel.org/show_bug.cgi?id=42728 Based-on-patch-by: AceLan Kao <acelan.kao@canonical.com> Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Tested-by: Dâniel Fraga <fragabr@gmail.com> Tested-by: Javier Marcet <jmarcet@gmail.com> Tested-by: Andrey Rahmatullin <wrar@wrar.name> Tested-by: Oleksij Rempel <bug-track@fisher-privat.net> Tested-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Cc: stable <stable@vger.kernel.org> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-07-10Merge tag 'rpmsg-3.5-fixes' of ↵Linus Torvalds1-0/+6
git://git.kernel.org/pub/scm/linux/kernel/git/ohad/rpmsg Pull rpmsg fixes from Ohad Ben-Cohen: "Fixing two (somewhat rare) endpoint-related race issues, both of which were reported by Fernando Guzman Lugo." * tag 'rpmsg-3.5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/rpmsg: rpmsg: make sure inflight messages don't invoke just-removed callbacks rpmsg: avoid premature deallocation of endpoints
2012-07-07security: Minor improvements to no_new_privs documentationAndy Lutomirski1-0/+2
The documentation didn't actually mention how to enable no_new_privs. This also adds a note about possible interactions between no_new_privs and LSMs (i.e. why teaching systemd to set no_new_privs is not necessarily a good idea), and it references the new docs from include/linux/prctl.h. Suggested-by: Rob Landley <rob@landley.net> Signed-off-by: Andy Lutomirski <luto@amacapital.net> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: James Morris <james.l.morris@oracle.com>
2012-07-06Merge branch 'fixes' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 Pull ocfs2 fixes from Joel Becker. * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: aio: make kiocb->private NUll in init_sync_kiocb() ocfs2: Fix bogus error message from ocfs2_global_read_info ocfs2: for SEEK_DATA/SEEK_HOLE, return internal error unchanged if ocfs2_get_clusters_nocache() or ocfs2_inode_lock() call failed. ocfs2: use spinlock irqsave for downconvert lock.patch ocfs2: Misplaced parens in unlikley ocfs2: clear unaligned io flag when dio fails
2012-07-06Merge branch 'for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input Pull input layer fixes from Dmitry Torokhov: "Two fixes for regressions in Wacom driver and fixes for drivers using threaded IRQ framework without specifying IRQF_ONESHOT." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: request threaded-only IRQs with IRQF_ONESHOT Input: wacom - don't retrieve touch_max when it is predefined Input: wacom - fix retrieving touch_max bug Input: fix input.h kernel-doc warning
2012-07-06Merge git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-2/+2
Pull KVM fix from Marcelo Tosatti: "Memory leak and oops on the x86 mmu code, and sanitization of the KVM_IRQFD ioctl." * git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: MMU: fix shrinking page from the empty mmu KVM: fix fault page leak KVM: Sanitize KVM_IRQFD flags KVM: Add missing KVM_IRQFD API documentation KVM: Pass kvm_irqfd to functions
2012-07-05gpio: fix bits conflict for gpio flagsLaxman Dewangan1-2/+2
The bit 2 and 3 in GPIO flag are allocated for the flag OPEN_DRAIN/OPEN_SOURCE. These bits are reused for the flag EXPORT/EXPORT_CHANGEABLE and so creating conflict. Fix this conflict by assigning bit 4 and 5 for the flag EXPORT/EXPORT_CHANGEABLE. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-07-05aio: make kiocb->private NUll in init_sync_kiocb()Junxiao Bi1-0/+1
Ocfs2 uses kiocb.*private as a flag of unsigned long size. In commit a11f7e6 ocfs2: serialize unaligned aio, the unaligned io flag is involved in it to serialize the unaligned aio. As *private is not initialized in init_sync_kiocb() of do_sync_write(), this unaligned io flag may be unexpectly set in an aligned dio. And this will cause OCFS2_I(inode)->ip_unaligned_aio decreased to -1 in ocfs2_dio_end_io(), thus the following unaligned dio will hang forever at ocfs2_aiodio_wait() in ocfs2_file_aio_write(). Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com> Cc: stable@vger.kernel.org Acked-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Joel Becker <jlbec@evilplan.org>
2012-07-04rpmsg: make sure inflight messages don't invoke just-removed callbacksOhad Ben-Cohen1-0/+3
When inbound messages arrive, rpmsg core looks up their associated endpoint (by destination address) and then invokes their callback. We've made sure that endpoints will never be de-allocated after they were found by rpmsg core, but we also need to protect against the (rare) scenario where the rpmsg driver was just removed, and its callback function isn't available anymore. This is achieved by introducing a callback mutex, which must be taken before the callback is invoked, and, obviously, before it is removed. Cc: stable <stable@vger.kernel.org> Reported-by: Fernando Guzman Lugo <fernando.lugo@ti.com> Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-04rpmsg: avoid premature deallocation of endpointsOhad Ben-Cohen1-0/+3
When an inbound message arrives, the rpmsg core looks up its associated endpoint and invokes the registered callback. If a message arrives while its endpoint is being removed (because the rpmsg driver was removed, or a recovery of a remote processor has kicked in) we must ensure atomicity, i.e.: - Either the ept is removed before it is found or - The ept is found but will not be freed until the callback returns This is achieved by maintaining a per-ept reference count, which, when drops to zero, will trigger deallocation of the ept. With this in hand, it is now forbidden to directly deallocate epts once they have been added to the endpoints idr. Cc: stable <stable@vger.kernel.org> Reported-by: Fernando Guzman Lugo <fernando.lugo@ti.com> Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
2012-07-04Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds2-5/+4
Pull block bits from Jens Axboe: "As vacation is coming up, thought I'd better get rid of my pending changes in my for-linus branch for this iteration. It contains: - Two patches for mtip32xx. Killing a non-compliant sysfs interface and moving it to debugfs, where it belongs. - A few patches from Asias. Two legit bug fixes, and one killing an interface that is no longer in use. - A patch from Jan, making the annoying partition ioctl warning a bit less annoying, by restricting it to !CAP_SYS_RAWIO only. - Three bug fixes for drbd from Lars Ellenberg. - A fix for an old regression for umem, it hasn't really worked since the plugging scheme was changed in 3.0. - A few fixes from Tejun. - A splice fix from Eric Dumazet, fixing an issue with pipe resizing." * 'for-linus' of git://git.kernel.dk/linux-block: scsi: Silence unnecessary warnings about ioctl to partition block: Drop dead function blk_abort_queue() block: Mitigate lock unbalance caused by lock switching block: Avoid missed wakeup in request waitqueue umem: fix up unplugging splice: fix racy pipe->buffers uses drbd: fix null pointer dereference with on-congestion policy when diskless drbd: fix list corruption by failing but already aborted reads drbd: fix access of unallocated pages and kernel panic xen/blkfront: Add WARN to deal with misbehaving backends. blkcg: drop local variable @q from blkg_destroy() mtip32xx: Create debugfs entries for troubleshooting mtip32xx: Remove 'registers' and 'flags' from sysfs blkcg: fix blkg_alloc() failure path block: blkcg_policy_cfq shouldn't be used if !CONFIG_CFQ_GROUP_IOSCHED block: fix return value on cfq_init() failure mtip32xx: Remove version.h header file inclusion xen/blkback: Copy id field when doing BLKIF_DISCARD.
2012-07-03KVM: Pass kvm_irqfd to functionsAlex Williamson1-2/+2
Prune this down to just the struct kvm_irqfd so we can avoid changing function definition for every flag or field we use. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-07-01linux/irq.h: fix kernel-doc warningRandy Dunlap1-2/+0
Fix kernel-doc warning. This struct member was removed in commit 875682648b89 ("irq: Remove irq_chip->release()") so remove its associated kernel-doc entry also. Warning(include/linux/irq.h:338): Excess struct/union/enum/typedef member 'release' description in 'irq_chip' Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Cc: Richard Weinberger <richard@nod.at> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-06-28Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds1-5/+2
Pull networking update from David Miller: 1) Pairing and deadlock fixes in bluetooth from Johan Hedberg. 2) Add device IDs for AR3011 and AR3012 bluetooth chips. From Giancarlo Formicuccia and Marek Vasut. 3) Fix wireless regulatory deadlock, from Eliad Peller. 4) Fix full TX ring panic in bnx2x driver, from Eric Dumazet. 5) Revert the two commits that added skb_orphan_try(), it causes erratic bonding behavior with UDP clients and the gains it used to give are mostly no longer happening due to how BQL works. From Eric Dumazet. 6) It took two tries, but Thomas Graf fixed a problem wherein we registered ipv6 routing procfs files before their backend data were initialized properly. 7) Fix max GSO size setting in be2net, from Sarveshwar Bandi. 8) PHY device id mask is wrong for KSZ9021 and KS8001 chips, fix from Jason Wang. 9) Fix use of stale SKB data pointer after skb_linearize() call in batman-adv, from Antonio Quartulli. 10) Fix memory leak in IXGBE due to missing __GFP_COMP, from Alexander Duyck. 11) Fix probing of Gobi devices in qmi_wwan usbnet driver, from Bjørn Mork. 12) Fix suspend/resume and open failure handling in usbnet from Ming Lei. 13) Attempt to fix device r8169 hangs for certain chips, from Francois Romieu. 14) Fix advancement of RX dirty pointer in some situations in sh_eth driver, from Yoshihiro Shimoda. 15) Attempt to fix restart of IPV6 routing table dumps when there is an intervening table update. From Eric Dumazet. 16) Respect security_inet_conn_request() return value in ipv6 TCP. From Neal Cardwell. 17) Add another iPAD device ID to ipheth driver, from Davide Gerhard. 18) Fix access to freed SKB in l2tp_eth_dev_xmit(), and fix l2tp lockdep splats, from Eric Dumazet. 19) Make sure all bridge devices, regardless of whether they were created via netlink or ioctls, have their rtnetlink ops hooked up. From Thomas Graf and Stephen Hemminger. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (81 commits) 9p: fix min_t() casting in p9pdu_vwritef() can: flexcan: use be32_to_cpup to handle the value of dt entry xen/netfront: teardown the device before unregistering it. bridge: Assign rtnl_link_ops to bridge devices created via ioctl (v2) vhost: use USER_DS in vhost_worker thread ixgbe: Do not pad FCoE frames as this can cause issues with FCoE DDP net: l2tp_eth: use LLTX to avoid LOCKDEP splats mac802154: add missed braces net: l2tp_eth: fix l2tp_eth_dev_xmit race net/mlx4_en: Release QP range in free_resources net/mlx4: Use single completion vector after NOP failure net/mlx4_en: Set correct port parameters during device initialization ipheth: add support for iPad caif-hsi: Add missing return in error path caif-hsi: Bugfix - Piggyback'ed embedded CAIF frame lost caif: Clear shutdown mask to zero at reconnect. tcp: heed result of security_inet_conn_request() in tcp_v6_conn_request() ipv6: fib: fix fib dump restart batman-adv: fix race condition in TT full-table replacement batman-adv: only drop packets of known wifi clients ...
2012-06-26Merge branch 'v4l_for_linus' of ↵Linus Torvalds1-3/+3
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media fixes from Mauro Carvalho Chehab. Trivial conflict due to new USB HID ID's being added next to each other (Baanto vs Axentia). * 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (44 commits) [media] smia: Fix compile failures [media] Fix VIDIOC_DQEVENT docbook entry [media] s5p-fimc: Fix control creation function [media] s5p-mfc: Fix checkpatch error in s5p_mfc_shm.h file [media] s5p-mfc: Fix setting controls [media] v4l/s5p-mfc: added image size align in VIDIOC_TRY_FMT [media] v4l/s5p-mfc: corrected encoder v4l control definitions [media] v4l: mem2mem_testdev: Fix race conditions in driver [media] s5p-mfc: Bug fix of timestamp/timecode copy mechanism [media] cxd2820r: Fix an incorrect modulation type bitmask [media] em28xx: Show a warning if the board does not support remote controls [media] em28xx: Add remote control support for Terratec's Cinergy HTC Stick HD [media] USB: Staging: media: lirc: initialize spinlocks before usage [media] Revert "[media] media: mx2_camera: Fix mbus format handling" [media] bw-qcam: driver and pixfmt documentation fixes [media] cx88: fix firmware load on big-endian systems [media] cx18: support big-endian systems [media] ivtv: fix support for big-endian systems [media] tuner-core: return the frequency range of the correct tuner [media] v4l2-dev.c: fix g_parm regression in determine_valid_ioctls() ...
2012-06-24Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds1-0/+4
Pull drm fixes from Dave Airlie: "Nothing major in here, one radeon SI fix for tiling, and one uninit var fix, two minor header file fixes." * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: drm: drop comment about this header being autogenerated. drm/edid: don't return stack garbage from supports_rb vga_switcheroo: Add include guard drm/radeon: SI tiling fixes for display
2012-06-22Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds1-3/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf updates from Ingo Molnar. * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: ftrace: Make all inline tags also include notrace perf: Use css_tryget() to avoid propping up css refcount perf tools: Fix synthesizing tracepoint names from the perf.data headers perf stat: Fix default output file perf tools: Fix endianity swapping for adds_features bitmask
2012-06-22Merge tag 'nfs-for-3.5-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds1-0/+1
Pull NFS client bugfixes from Trond Myklebust: - Fix a write hang due to an uninitalised variable when !defined(CONFIG_NFS_V4) - Address upcall races in the legacy NFSv4 idmapper - Remove an O_DIRECT refcounting issue - Fix a pNFS refcounting bug when the file layout metadata server is also acting as a data server - Fix a pNFS module loading race. * tag 'nfs-for-3.5-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: NFS: Force the legacy idmapper to be single threaded NFS: Initialise commit_info.rpc_out when !defined(CONFIG_NFS_V4) NFS: Fix a refcounting issue in O_DIRECT NFSv4.1: Fix a race in set_pnfs_layoutdriver NFSv4.1: Fix umount when filelayout DS is also the MDS
2012-06-21vga_switcheroo: Add include guardOzan Çağlayan1-0/+4
Guard vga_switcheroo.h against multiple inclusion. Signed-off-by: Ozan Çağlayan <ozancag@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2012-06-21Merge tag 'staging-3.5-rc4' of ↵Linus Torvalds1-0/+2
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging tree fixes from Greg Kroah-Hartman: "Here are a number of small fixes for the drivers/staging tree, as well as iio and pstore drivers (which came from the staging tree in the 3.5-rc1 merge). All of these are tiny, but resolve issues that people have been reporting. There's also a documentation update to reflect what the iio drivers really are doing, which is good to get straightened out. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>" * tag 'staging-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: staging: r8712u: Add new USB IDs staging: gdm72xx: Release netlink socket properly iio: drop wrong reference from Kconfig pstore/inode: Make pstore_fill_super() static pstore/ram: Should zap persistent zone on unlink pstore/ram_core: Factor persistent_ram_zap() out of post_init() pstore/ram_core: Do not reset restored zone's position and size pstore/ram: Should update old dmesg buffer before reading staging:iio:ad7298: Fix linker error due to missing IIO kfifo buffer Revert "staging: usbip: bugfix for stack corruption on 64-bit architectures" staging: usbip: bugfix for stack corruption on 64-bit architectures staging/comedi: fix build for USB not enabled staging: omapdrm: fix crash when freeing bad fb staging:iio:ad7606: Re-add missing scale attribute iio: Fix potential use after free staging:iio: remove num_interrupt_lines from documentation iio: documentation: Add out_altvoltage and friends
2012-06-21Merge tag 'driver-core-3.5-rc4' of ↵Linus Torvalds1-7/+38
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core and printk fixes from Greg Kroah-Hartman: "Here are some fixes for 3.5-rc4 that resolve the kmsg problems that people have reported showing up after the printk and kmsg changes went into 3.5-rc1. There are also a smattering of other tiny fixes for the extcon and hyper-v drivers that people have reported. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>" * tag 'driver-core-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: extcon: max8997: Add missing kfree for info->edev in max8997_muic_remove() extcon: Set platform drvdata in gpio_extcon_probe() and fix irq leak extcon: Fix wrong index in max8997_extcon_cable[] kmsg - kmsg_dump() fix CONFIG_PRINTK=n compilation printk: return -EINVAL if the message len is bigger than the buf size printk: use mutex lock to stop syslog_seq from going wild kmsg - kmsg_dump() use iterator to receive log buffer content vme: change maintainer e-mail address Extcon: Don't try to create duplicate link names driver core: fixup reversed deferred probe order printk: Fix alignment of buf causing crash on ARM EABI Tools: hv: verify origin of netlink connector message
2012-06-21Merge branch 'akpm' (Andrew's patch-bomb)Linus Torvalds3-2/+12
* emailed from Andrew Morton <akpm@linux-foundation.org>: (21 patches) mm/memblock: fix overlapping allocation when doubling reserved array c/r: prctl: Move PR_GET_TID_ADDRESS to a proper place pidns: find_new_reaper() can no longer switch to init_pid_ns.child_reaper pidns: guarantee that the pidns init will be the last pidns process reaped fault-inject: avoid call to random32() if fault injection is disabled Viresh has moved get_maintainer: Fix --help warning mm/memory.c: fix kernel-doc warnings mm: fix kernel-doc warnings mm: correctly synchronize rss-counters at exit/exec mm, thp: print useful information when mmap_sem is unlocked in zap_pmd_range h8300: use the declarations provided by <asm/sections.h> h8300: fix use of extinct _sbss and _ebss xtensa: use the declarations provided by <asm/sections.h> xtensa: use "test -e" instead of bashism "test -a" xtensa: replace xtensa-specific _f{data,text} by _s{data,text} memcg: fix use_hierarchy css_is_ancestor oops regression mm, oom: fix and cleanup oom score calculations nilfs2: ensure proper cache clearing for gc-inodes thp: avoid atomic64_read in pmd_read_atomic for 32bit PAE ...
2012-06-21Viresh has movedViresh Kumar2-2/+2
viresh.kumar@st.com email-id doesn't exist anymore as I have left the company. Replace ST's id with viresh.linux@gmail.com. It also updates .mailmap file to fix address for 'git shortlog' Signed-off-by: Viresh Kumar <viresh.linux@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-06-21mm: fix slab->page _count corruption when using slubPravin B Shelar1-0/+10
On arches that do not support this_cpu_cmpxchg_double() slab_lock is used to do atomic cmpxchg() on double word which contains page->_count. The page count can be changed from get_page() or put_page() without taking slab_lock. That corrupts page counter. Fix it by moving page->_count out of cmpxchg_double data. So that slub does no change it while updating slub meta-data in struct page. [akpm@linux-foundation.org: use standard comment layout, tweak comment text] Reported-by: Amey Bhide <abhide@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Acked-by: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-06-20Merge tag 'sound-3.5' of ↵Linus Torvalds2-1/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "Most of changes are fairly small and driver-specific. A remaining regression fix for USB-audio sync pipe check, a fix for HD-audio power-up sequence, fixes for ASoC pxa-ssp compile issues, and bunch of ASoC codec and trivial fix patches." * tag 'sound-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: 6fire: use NULL instead of 0 for pointer assignment ALSA: hda - Handle open while transitioning to D3. ALSA: snd-usb: make snd_usb_substream_capture_trigger static ALSA: snd-usb: fix sync pipe check ASoC: tegra+wm8903: turn of mic detect when card is removed ASoC: wm8996: Mark the CODEC as cache only when powering off on boot ASoC: wm8996: Move reset before the initial regulator disable ASoC: wm8996: Remove spurious regulator_bulk_free() ASoC: wm8904: Fix cache only management ASoC: wm8904: Fix GPIO and MICBIAS initialisation for regmap conversion ASoC: fix pxa-ssp compiling issue under mach-mmp ARM: MMP: add pxa910-ssp into ssp_id_table
2012-06-19kmsg - kmsg_dump() fix CONFIG_PRINTK=n compilationKay Sievers1-5/+5
Signed-off-by: Kay Sievers <kay@vrfy.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Reported-by: Randy Dunlap <rdunlap@xenotime.net> Reported-by: Fengguang Wu <wfg@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-06-18Merge tag 'mmc-fixes-for-3.5-rc4' of ↵Linus Torvalds1-0/+2
git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc Pull MMC fixes from Chris Ball: - atmel-mci: Fixes for NULL timer and DMA burst/chunk size - dw_mmc: Fix DMA ordering, clkdiv calculation, NULL host->data - mxs_mmc: Compile fix for CONFIG_OF=y && CONFIG_PM=n - omap: Fix NULL deref in mmc_omap_remove_slot(), reg_shift initialization - sdhci-s3c: Fix boot regression by adding IRQF_ONESHOT flag - Small fixes to core/sd, core/sdio, sdhci * tag 'mmc-fixes-for-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: mmc: mxs-mmc: Move of_match_table out of CONFIG_PM mmc: sdhci-s3c: pass IRQF ONESHOT to request threaded irq mmc: core: return an error on suspend if mmc_deselect_cards fails mmc: omap: Fix broken reg_shift initialization mmc: omap: Fix NULL pointer dereference if mmc_omap_new_slot() fails mmc: omap: Fix a section warning regression mmc: dw_mmc: correct the calculation for CLKDIV mmc: dw_mmc: fix incorrect setting of host->data of NULL mmc: dw_mmc: fix the IDMAC sw reset mmc: dw_mmc: fix the transmission handling in IDMAC mmc: sdio: fix setting card data bus width as 4-bit mmc: atmel-mci: fix burst/chunk size modification mmc: atmel-mci: fix data timeout issue mmc: sdhci: Use DBG() instead of pr_warning() on large timeout
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