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2013-06-29locks: convert fl_link to a hlist_nodeJeff Layton1-1/+1
Testing has shown that iterating over the blocked_list for deadlock detection turns out to be a bottleneck. In order to alleviate that, begin the process of turning it into a hashtable. We start by turning the fl_link into a hlist_node and the global lists into hlists. A later patch will do the conversion of the blocked_list to a hashtable. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: J. Bruce Fields <bfields@fieldses.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29locks: protect most of the file_lock handling with i_lockJeff Layton1-11/+0
Having a global lock that protects all of this code is a clear scalability problem. Instead of doing that, move most of the code to be protected by the i_lock instead. The exceptions are the global lists that the ->fl_link sits on, and the ->fl_block list. ->fl_link is what connects these structures to the global lists, so we must ensure that we hold those locks when iterating over or updating these lists. Furthermore, sound deadlock detection requires that we hold the blocked_list state steady while checking for loops. We also must ensure that the search and update to the list are atomic. For the checking and insertion side of the blocked_list, push the acquisition of the global lock into __posix_lock_file and ensure that checking and update of the blocked_list is done without dropping the lock in between. On the removal side, when waking up blocked lock waiters, take the global lock before walking the blocked list and dequeue the waiters from the global list prior to removal from the fl_block list. With this, deadlock detection should be race free while we minimize excessive file_lock_lock thrashing. Finally, in order to avoid a lock inversion problem when handling /proc/locks output we must ensure that manipulations of the fl_block list are also protected by the file_lock_lock. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29locks: comment cleanups and clarificationsJeff Layton1-0/+18
Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29cifs: use posix_unblock_lock instead of locks_delete_blockJeff Layton1-5/+0
commit 66189be74 (CIFS: Fix VFS lock usage for oplocked files) exported the locks_delete_block symbol. There's already an exported helper function that provides this capability however, so make cifs use that instead and turn locks_delete_block back into a static function. Note that if fl->fl_next == NULL then this lock has already been through locks_delete_block(), so we should be OK to ignore an ENOENT error here and simply not retry the lock. Cc: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: J. Bruce Fields <bfields@fieldses.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29locks: drop the unused filp argument to posix_unblock_lockJeff Layton1-3/+2
Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29Don't pass inode to ->d_hash() and ->d_compare()Linus Torvalds1-6/+3
Instances either don't look at it at all (the majority of cases) or only want it to find the superblock (which can be had as dentry->d_sb). A few cases that want more are actually safe with dentry->d_inode - the only precaution needed is the check that it hadn't been replaced with NULL by rmdir() or by overwriting rename(), which case should be simply treated as cache miss. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29constify rw_verify_area()Al Viro1-1/+0
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29new helper: fixed_size_llseek()Al Viro1-0/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29kill find_inode_number()Al Viro1-1/+0
the only remaining caller (in ncpfs) is guaranteed to return 0 - we only hit it if we'd just checked that there's no dentry with such name. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29Replace a bunch of file->dentry->d_inode refs with file_inode()David Howells1-4/+4
Replace a bunch of file->dentry->d_inode refs with file_inode(). In __fput(), use file->f_inode instead so as not to be affected by any tricks that file_inode() might grow. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29allow the temp files created by open() to be linked toAl Viro1-0/+1
O_TMPFILE | O_CREAT => linkat() with AT_SYMLINK_FOLLOW and /proc/self/fd/<n> as oldpath (i.e. flink()) will create a link O_TMPFILE | O_CREAT | O_EXCL => ENOENT on attempt to link those guys Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[O_TMPFILE] it's still short a few helpers, but infrastructure should be OK ↵Al Viro3-0/+7
now... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] constify ->actorAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] ->readdir() is goneAl Viro1-1/+0
everything's converted to ->iterate() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert ext3Al Viro1-0/+6
new helper: dir_relax(inode). Call when you are in location that will _not_ be invalidated by directory modifications (block boundary, in case of ext*). Returns whether the directory has survived (dropping i_mutex allows rmdir to kill the sucker; if it returns false to us, ->iterate() is obviously done) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] switch dcache_readdir() users to ->iterate()Al Viro1-7/+32
new helpers - dir_emit_dot(file, ctx, dentry), dir_emit_dotdot(file, ctx), dir_emit_dots(file, ctx). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] introduce ->iterate(), ctx->pos, dir_emit()Al Viro1-0/+9
New method - ->iterate(file, ctx). That's the replacement for ->readdir(); it takes callback from ctx->actor, uses ctx->pos instead of file->f_pos and calls dir_emit(ctx, ...) instead of filldir(data, ...). It does *not* update file->f_pos (or look at it, for that matter); iterate_dir() does the update. Note that dir_emit() takes the offset from ctx->pos (and eventually filldir_t will lose that argument). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] introduce iterate_dir() and dir_contextAl Viro1-0/+4
iterate_dir(): new helper, replacing vfs_readdir(). struct dir_context: contains the readdir callback (and will get more stuff in it), embedded into whatever data that callback wants to deal with; eventually, we'll be passing it to ->readdir() replacement instead of (data,filldir) pair. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29move linux/loop.h to drivers/blockAl Viro1-85/+0
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29consolidate io_remap_pfn_range definitionsAl Viro1-0/+4
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-20splice: don't pass the address of ->f_pos to methodsAl Viro2-2/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds1-3/+3
Pull networking fixes from David Miller: 1) Fix RTNL locking in batman-adv, from Matthias Schiffer. 2) Don't allow non-passthrough macvlan devices to set NOPROMISC via netlink, otherwise we can end up with corrupted promisc counter values on the device. From Michael S Tsirkin. 3) Fix stmmac driver build with debugging defines enabled, from Dinh Nguyen. 4) Make sure name string we give in socket address in AF_PACKET is NULL terminated, from Daniel Borkmann. 5) Fix leaking of two uninitialized bytes of memory to userspace in l2tp, from Guillaume Nault. 6) Clear IPCB(skb) before tunneling otherwise we touch dangling IP options state and crash. From Saurabh Mohan. 7) Fix suspend/resume for davinci_mdio by using suspend_late and resume_early. From Mugunthan V N. 8) Don't tag ip_tunnel_init_net and ip_tunnel_delete_net with __net_{init,exit}, they can be called outside of those contexts. From Eric Dumazet. 9) Fix RX length error in sh_eth driver, from Yoshihiro Shimoda. 10) Fix missing sctp_outq initialization in some code paths of SCTP stack, from Neil Horman. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (21 commits) sctp: fully initialize sctp_outq in sctp_outq_init netiucv: Hold rtnl between name allocation and device registration. tulip: Properly check dma mapping result net: sh_eth: fix incorrect RX length error if R8A7740 ip_tunnel: remove __net_init/exit from exported functions drivers: net: davinci_mdio: restore mdio clk divider in mdio resume drivers: net: davinci_mdio: moving mdio resume earlier than cpsw ethernet driver net/ipv4: ip_vti clear skb cb before tunneling. tg3: Wait for boot code to finish after power on l2tp: Fix sendmsg() return value l2tp: Fix PPP header erasure and memory leak bonding: fix igmp_retrans type and two related races bonding: reset master mac on first enslave failure packet: packet_getname_spkt: make sure string is always 0-terminated net: ethernet: stmicro: stmmac: Fix compile error when STMMAC_XMIT_DEBUG used be2net: Fix 32-bit DMA Mask handling xen-netback: don't de-reference vif pointer after having called xenvif_put() macvlan: don't touch promisc without passthrough batman-adv: Don't handle address updates when bla is disabled batman-adv: forward late OGMs from best next hop ...
2013-06-14smp.h: Use local_irq_{save,restore}() in !SMP version of on_each_cpu().David Daney1-7/+12
Thanks to commit f91eb62f71b3 ("init: scream bloody murder if interrupts are enabled too early"), "bloody murder" is now being screamed. With a MIPS OCTEON config, we use on_each_cpu() in our irq_chip.irq_bus_sync_unlock() function. This gets called in early as a result of the time_init() call. Because the !SMP version of on_each_cpu() unconditionally enables irqs, we get: WARNING: at init/main.c:560 start_kernel+0x250/0x410() Interrupts were enabled early CPU: 0 PID: 0 Comm: swapper Not tainted 3.10.0-rc5-Cavium-Octeon+ #801 Call Trace: show_stack+0x68/0x80 warn_slowpath_common+0x78/0xb0 warn_slowpath_fmt+0x38/0x48 start_kernel+0x250/0x410 Suggested fix: Do what we already do in the SMP version of on_each_cpu(), and use local_irq_save/local_irq_restore. Because we need a flags variable, make it a static inline to avoid name space issues. [ Change from v1: Convert on_each_cpu to a static inline function, add #include <linux/irqflags.h> to avoid build breakage on some files. on_each_cpu_mask() and on_each_cpu_cond() suffer the same problem as on_each_cpu(), but they are not causing !SMP bugs for me, so I will defer changing them to a less urgent patch. ] Signed-off-by: David Daney <david.daney@cavium.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-06-13Merge branch 'rcu/urgent' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu Pull RCU fixes from Paul McKenney: "I must confess that this past merge window was not RCU's best showing. This series contains three more fixes for RCU regressions: 1. A fix to __DECLARE_TRACE_RCU() that causes it to act as an interrupt from idle rather than as a task switch from idle. This change is needed due to the recent use of _rcuidle() tracepoints that can be invoked from interrupt handlers as well as from idle. Without this fix, invoking _rcuidle() tracepoints from interrupt handlers results in splats and (more seriously) confusion on RCU's part as to whether a given CPU is idle or not. This confusion can in turn result in too-short grace periods and therefore random memory corruption. 2. A fix to a subtle deadlock that could result due to RCU doing a wakeup while holding one of its rcu_node structure's locks. Although the probability of occurrence is low, it really does happen. The fix, courtesy of Steven Rostedt, uses irq_work_queue() to avoid the deadlock. 3. A fix to a silent deadlock (invisible to lockdep) due to the interaction of timeouts posted by RCU debug code enabled by CONFIG_PROVE_RCU_DELAY=y, grace-period initialization, and CPU hotplug operations. This will not occur in production kernels, but really does occur in randconfig testing. Diagnosis courtesy of Steven Rostedt" * 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: rcu: Fix deadlock with CPU hotplug, RCU GP init, and timer migration rcu: Don't call wakeup() with rcu_node structure ->lock held trace: Allow idle-safe tracepoints to be called from irq
2013-06-13Merge tag 'asoc-v3.10-rc5' of ↵Linus Torvalds1-1/+2
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound Pull ASoC sound updates from Mark Brown: "Takashi is travelling at the minute and it'd be good to get the MAINTAINERS update in here merged so sending directly. As well as the usual driver specifics we've got a couple of core fixes here, one fixing capabilities for unidirectional streams and the other fixing suspend while audio streams are active. The suspend fix is a little involved but mostly as a result of removing some special casing that was doing the wrong thing." * tag 'asoc-v3.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound: ASoC: tlv320aic3x: Remove deadlock from snd_soc_dapm_put_volsw_aic3x() ASoC: dapm: Treat DAI widgets like AIF widgets for power ASoC: arizona: Correct AEC loopback enable ASoC: pcm: Require both CODEC and CPU support when declaring stream caps MAINTAINERS: Remove myself from Wolfson maintainers ASoC: wm8994: Ensure microphone detection state is reset on removal ASoC: wm8994: Avoid leaking pm_runtime reference on removed jack race ASoC: cs42l52: fix hp_gain_enum shift value. ASoC: cs42l52: use correct PCM mixer TLV dB scale to match datasheet.
2013-06-13ip_tunnel: remove __net_init/exit from exported functionsEric Dumazet1-3/+3
If CONFIG_NET_NS is not set then __net_init is the same as __init and __net_exit is the same as __exit. These functions will be removed from memory after the module loads or is removed. Functions that are exported for use by other functions should never be labeled for removal. Bug introduced by commit c54419321455631079c ("GRE: Refactor GRE tunneling code.") Reported-by: Steinar H. Gunderson <sgunderson@bigfoot.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-12Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds4-2/+5
Pull networking update from David Miller: 1) Fix dump iterator in nfnl_acct_dump() and ctnl_timeout_dump() to dump all objects properly, from Pablo Neira Ayuso. 2) xt_TCPMSS must use the default MSS of 536 when no MSS TCP option is present. Fix from Phil Oester. 3) qdisc_get_rtab() looks for an existing matching rate table and uses that instead of creating a new one. However, it's key matching is incomplete, it fails to check to make sure the ->data[] array is identical too. Fix from Eric Dumazet. 4) ip_vs_dest_entry isn't fully initialized before copying back to userspace, fix from Dan Carpenter. 5) Fix ubuf reference counting regression in vhost_net, from Jason Wang. 6) When sock_diag dumps a socket filter back to userspace, we have to translate it out of the kernel's internal representation first. From Nicolas Dichtel. 7) davinci_mdio holds a spinlock while calling pm_runtime, which sleeps. Fix from Sebastian Siewior. 8) Timeout check in sh_eth_check_reset is off by one, from Sergei Shtylyov. 9) If sctp socket init fails, we can NULL deref during cleanup. Fix from Daniel Borkmann. 10) netlink_mmap() does not propagate errors properly, from Patrick McHardy. 11) Disable powersave and use minstrel by default in ath9k. From Sujith Manoharan. 12) Fix a regression in that SOCK_ZEROCOPY is not set on tuntap sockets which prevents vhost from being able to use zerocopy. From Jason Wang. 13) Fix race between port lookup and TX path in team driver, from Jiri Pirko. 14) Missing length checks in bluetooth L2CAP packet parsing, from Johan Hedberg. 15) rtlwifi fails to connect to networking using any encryption method other than WPA2. Fix from Larry Finger. 16) Fix iwlegacy build due to incorrect CONFIG_* ifdeffing for power management stuff. From Yijing Wang. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (35 commits) b43: stop format string leaking into error msgs ath9k: Use minstrel rate control by default Revert "ath9k_hw: Update rx gain initval to improve rx sensitivity" ath9k: Disable PowerSave by default net: wireless: iwlegacy: fix build error for il_pm_ops rtlwifi: Fix a false leak indication for PCI devices wl12xx/wl18xx: scan all 5ghz channels wl12xx: increase minimum singlerole firmware version required wl12xx: fix minimum required firmware version for wl127x multirole rtlwifi: rtl8192cu: Fix problem in connecting to WEP or WPA(1) networks mwifiex: debugfs: Fix out of bounds array access Bluetooth: Fix mgmt handling of power on failures Bluetooth: Fix missing length checks for L2CAP signalling PDUs Bluetooth: btmrvl: support Marvell Bluetooth device SD8897 Bluetooth: Fix checks for LE support on LE-only controllers team: fix checks in team_get_first_port_txable_rcu() team: move add to port list before port enablement team: check return value of team_get_port_by_index_rcu() for NULL tuntap: set SOCK_ZEROCOPY flag during open netlink: fix error propagation in netlink_mmap() ...
2013-06-12Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds1-0/+3
Pull block layer fixes from Jens Axboe: "Outside of bcache (which really isn't super big), these are all few-liners. There are a few important fixes in here: - Fix blk pm sleeping when holding the queue lock - A small collection of bcache fixes that have been done and tested since bcache was included in this merge window. - A fix for a raid5 regression introduced with the bio changes. - Two important fixes for mtip32xx, fixing an oops and potential data corruption (or hang) due to wrong bio iteration on stacked devices." * 'for-linus' of git://git.kernel.dk/linux-block: scatterlist: sg_set_buf() argument must be in linear mapping raid5: Initialize bi_vcnt pktcdvd: silence static checker warning block: remove refs to XD disks from documentation blkpm: avoid sleep when holding queue lock mtip32xx: Correctly handle bio->bi_idx != 0 conditions mtip32xx: Fix NULL pointer dereference during module unload bcache: Fix error handling in init code bcache: clarify free/available/unused space bcache: drop "select CLOSURES" bcache: Fix incompatible pointer type warning
2013-06-12include/linux/math64.h: add div64_ul()Alex Shi1-2/+4
There is div64_long() to handle the s64/long division, but no mocro do u64/ul division. It is necessary in some scenarios, so add this function. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Alex Shi <alex.shi@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-06-12mm: migration: add migrate_entry_wait_huge()Naoya Horiguchi1-0/+3
When we have a page fault for the address which is backed by a hugepage under migration, the kernel can't wait correctly and do busy looping on hugepage fault until the migration finishes. As a result, users who try to kick hugepage migration (via soft offlining, for example) occasionally experience long delay or soft lockup. This is because pte_offset_map_lock() can't get a correct migration entry or a correct page table lock for hugepage. This patch introduces migration_entry_wait_huge() to solve this. Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Reviewed-by: Rik van Riel <riel@redhat.com> Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com> Reviewed-by: Michal Hocko <mhocko@suse.cz> Cc: Mel Gorman <mgorman@suse.de> Cc: Andi Kleen <andi@firstfloor.org> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: <stable@vger.kernel.org> [2.6.35+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-06-12kmsg: honor dmesg_restrict sysctl on /dev/kmsgKees Cook1-2/+2
The dmesg_restrict sysctl currently covers the syslog method for access dmesg, however /dev/kmsg isn't covered by the same protections. Most people haven't noticed because util-linux dmesg(1) defaults to using the syslog method for access in older versions. With util-linux dmesg(1) defaults to reading directly from /dev/kmsg. To fix /dev/kmsg, let's compare the existing interfaces and what they allow: - /proc/kmsg allows: - open (SYSLOG_ACTION_OPEN) if CAP_SYSLOG since it uses a destructive single-reader interface (SYSLOG_ACTION_READ). - everything, after an open. - syslog syscall allows: - anything, if CAP_SYSLOG. - SYSLOG_ACTION_READ_ALL and SYSLOG_ACTION_SIZE_BUFFER, if dmesg_restrict==0. - nothing else (EPERM). The use-cases were: - dmesg(1) needs to do non-destructive SYSLOG_ACTION_READ_ALLs. - sysklog(1) needs to open /proc/kmsg, drop privs, and still issue the destructive SYSLOG_ACTION_READs. AIUI, dmesg(1) is moving to /dev/kmsg, and systemd-journald doesn't clear the ring buffer. Based on the comments in devkmsg_llseek, it sounds like actions besides reading aren't going to be supported by /dev/kmsg (i.e. SYSLOG_ACTION_CLEAR), so we have a strict subset of the non-destructive syslog syscall actions. To this end, move the check as Josh had done, but also rename the constants to reflect their new uses (SYSLOG_FROM_CALL becomes SYSLOG_FROM_READER, and SYSLOG_FROM_FILE becomes SYSLOG_FROM_PROC). SYSLOG_FROM_READER allows non-destructive actions, and SYSLOG_FROM_PROC allows destructive actions after a capabilities-constrained SYSLOG_ACTION_OPEN check. - /dev/kmsg allows: - open if CAP_SYSLOG or dmesg_restrict==0 - reading/polling, after open Addresses https://bugzilla.redhat.com/show_bug.cgi?id=903192 [akpm@linux-foundation.org: use pr_warn_once()] Signed-off-by: Kees Cook <keescook@chromium.org> Reported-by: Christian Kujau <lists@nerdbynature.de> Tested-by: Josh Boyer <jwboyer@redhat.com> Cc: Kay Sievers <kay@vrfy.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-06-12CPU hotplug: provide a generic helper to disable/enable CPU hotplugSrivatsa S. Bhat1-0/+4
There are instances in the kernel where we would like to disable CPU hotplug (from sysfs) during some important operation. Today the freezer code depends on this and the code to do it was kinda tailor-made for that. Restructure the code and make it generic enough to be useful for other usecases too. Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by: Robin Holt <holt@sgi.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Russ Anderson <rja@sgi.com> Cc: Robin Holt <holt@sgi.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: Shawn Guo <shawn.guo@linaro.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-06-12Merge branch 'master' of ↵John W. Linville2-0/+2
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem
2013-06-12Bluetooth: Fix mgmt handling of power on failuresJohan Hedberg2-0/+2
If hci_dev_open fails we need to ensure that the corresponding mgmt_set_powered command gets an appropriate response. This patch fixes the missing response by adding a new mgmt_set_powered_failed function that's used to indicate a power on failure to mgmt. Since a situation with the device being rfkilled may require special handling in user space the patch uses a new dedicated mgmt status code for this. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Cc: stable@vger.kernel.org Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2013-06-12team: fix checks in team_get_first_port_txable_rcu()Jiri Pirko1-2/+2
should be checked if "cur" is txable, not "port". Introduced by commit 6e88e1357c "team: use function team_port_txable() for determing enabled and up port" Signed-off-by: Jiri Pirko <jiri@resnulli.us> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-11Merge branch 'fixes' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2-0/+6
Pull kvm bugfixes from Gleb Natapov: "There is one more fix for MIPS KVM ABI here, MIPS and PPC build breakage fixes and a couple of PPC bug fixes" * 'fixes' of git://git.kernel.org/pub/scm/virt/kvm/kvm: kvm/ppc/booke64: Fix lazy ee handling in kvmppc_handle_exit() kvm/ppc/booke: Hold srcu lock when calling gfn functions kvm/ppc/booke64: Disable e6500 support kvm/ppc/booke64: Fix AltiVec interrupt numbers and build breakage mips/kvm: Use KVM_REG_MIPS and proper size indicators for *_ONE_REG kvm: Add definition of KVM_REG_MIPS KVM: add kvm_para_available to asm-generic/kvm_para.h
2013-06-11kvm: Add definition of KVM_REG_MIPSDavid Daney1-0/+1
We use 0x7000000000000000ULL as 0x6000000000000000ULL is reserved for ARM64. Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-06-10sock_diag: fix filter code sent to userspaceNicolas Dichtel1-0/+1
Filters need to be translated to real BPF code for userland, like SO_GETFILTER. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-10trace: Allow idle-safe tracepoints to be called from irqPaul E. McKenney1-2/+2
__DECLARE_TRACE_RCU() currently creates an _rcuidle() tracepoint which may safely be invoked from what RCU considers to be an idle CPU. However, these _rcuidle() tracepoints may -not- be invoked from the handler of an irq taken from idle, because rcu_idle_enter() zeroes RCU's nesting-level counter, so that the rcu_irq_exit() returning to idle will trigger a WARN_ON_ONCE(). This commit therefore substitutes rcu_irq_enter() for rcu_idle_exit() and rcu_irq_exit() for rcu_idle_enter() in order to make the _rcuidle() tracepoints usable from irq handlers as well as from process context. Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org>
2013-06-10Merge remote-tracking branch 'asoc/fix/core' into asoc-linusMark Brown1-1/+2
2013-06-07Merge tag 'trace-fixes-v3.10-rc3-v3' of ↵Linus Torvalds2-0/+29
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing fixes from Steven Rostedt: "This contains 4 fixes. The first two fix the case where full RCU debugging is enabled, enabling function tracing causes a live lock of the system. This is due to the added debug checks in rcu_dereference_raw() that is used by the function tracer. These checks are also traced by the function tracer as well as cause enough overhead to the function tracer to slow down the system enough that the time to finish an interrupt can take longer than when the next interrupt is triggered, causing a live lock from the timer interrupt. Talking this over with Paul McKenney, we came up with a fix that adds a new rcu_dereference_raw_notrace() that does not perform these added checks, and let the function tracer use that. The third commit fixes a failed compile when branch tracing is enabled, due to the conversion of the trace_test_buffer() selftest that the branch trace wasn't converted for. The forth patch fixes a bug caught by the RCU lockdep code where a rcu_read_lock() is performed when rcu is disabled (either going to or from idle, or user space). This happened on the irqsoff tracer as it calls task_uid(). The fix here was to use current_uid() when possible that doesn't use rcu locking. Which luckily, is always used when irqsoff calls this code." * tag 'trace-fixes-v3.10-rc3-v3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing: Use current_uid() for critical time tracing tracing: Fix bad parameter passed in branch selftest ftrace: Use the rcu _notrace variants for rcu_dereference_raw() and friends rcu: Add _notrace variation of rcu_dereference_raw() and hlist_for_each_entry_rcu()
2013-06-07ASoC: dapm: Treat DAI widgets like AIF widgets for powerMark Brown1-1/+2
Even though they are virtual widgets DAI widgets still get counted for the DAPM context power management so we can't just use the active state to check if they should be powered as they may not be part of a complete path. Instead split them into input and output widgets and do the same power checks as we perform on AIFs. Reported-by: Stephen Warren <swarren@nvidia.com> Tested-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-06-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds1-0/+3
Pull networking fix from David Miller: "This is a quick one commit pull request to cure the regression introduced by the MSG_CMSG_COMPAT change." (Background: commit 1be374a0518a completely broke 32-bit COMPAT handling by not only disallowing MSG_CMSG_COMPAT from user APIs, but clearing it in our own internal use too!) * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: net: Unbreak compat_sys_{send,recv}msg
2013-06-06net: Unbreak compat_sys_{send,recv}msgAndy Lutomirski1-0/+3
I broke them in this commit: commit 1be374a0518a288147c6a7398792583200a67261 Author: Andy Lutomirski <luto@amacapital.net> Date: Wed May 22 14:07:44 2013 -0700 net: Block MSG_CMSG_COMPAT in send(m)msg and recv(m)msg This patch adds __sys_sendmsg and __sys_sendmsg as common helpers that accept MSG_CMSG_COMPAT and blocks MSG_CMSG_COMPAT at the syscall entrypoints. It also reverts some unnecessary checks in sys_socketcall. Apparently I was suffering from underscore blindness the first time around. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Tested-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-06arch, mm: Remove tlb_fast_mode()Peter Zijlstra1-16/+1
Since the introduction of preemptible mmu_gather TLB fast mode has been broken. TLB fast mode relies on there being absolutely no concurrency; it frees pages first and invalidates TLBs later. However now we can get concurrency and stuff goes *bang*. This patch removes all tlb_fast_mode() code; it was found the better option vs trying to patch the hole by entangling tlb invalidation with the scheduler. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Russell King <linux@arm.linux.org.uk> Cc: Tony Luck <tony.luck@intel.com> Reported-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-06-05KVM: add kvm_para_available to asm-generic/kvm_para.hJames Hogan1-0/+5
According to include/uapi/linux/kvm_para.h architectures should define kvm_para_available, so add an implementation to asm-generic/kvm_para.h which just returns false. This fixes intel8x0.c build failure on mips with KVM enabled. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Gleb Natapov <gleb@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-06-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds7-9/+65
Pull networking fixes from David Miller: 1) Fix timeouts with direct mode authentication in mac80211, from Stanislaw Gruszka. 2) Aggregation sessions can deadlock in ath9k, from Felix Fietkau. 3) Netfilter's xt_addrtype doesn't work with ipv6 due to route lookups creating undesirable cache entries, from Florian Westphal. 4) Fix netfilter's ipt_ULOG from generating non-NULL terminated strings. 5) Fix netdev transmit queue crashes in mac80211, from Johannes Berg. 6) Fix copy and paste error in 802.11 stack that broke reporting of 64-bit station tx statistics, from Felix Fietkau. 7) When qlge_probe fails, it leaks the netdev. Fix from Wei Yongjun. 8) SKB control block (where we store the IP options information, amongst other things) must be cleared properly otherwise ICMP sending can crash for IP tunnels. Fix from Eric Dumazet. 9) Verification of Energy Efficient Ether support was coded wrongly, the test was inversed. Fix from Giuseppe CAVALLARO. 10) TCP handles redirects improperly because the wrong flow key is used for the route lookup. From Michal Kubecek. 11) Don't interpret MSG_CMSG_COMPAT from userspace, fix from Andy Lutomirski. 12) The new AF_VSOCK was missing from the lockdep string table, fix from Federico Vaga. 13) be2net doesn't handle checksumming of IP fragments properly, from Somnath Kotur. 14) Fix several bugs in the device address list code that lead to crashes and other misbehaviors. From Jay Vosburgh. 15) Fix ipv6 segmentation handling of fragmented GRE tunnel traffic, from Pravin B Shalr. 16) Fix usage of stale policies in IPSEC layer, from Paul Moore. 17) Fix team driver dump of ports when there are a large number of them, from Jiri Pirko. 18) Fix softlockups in UDP ipv4 socket lookup causes by and error in the hlist_nulls_for_each_entry_rcu() macro. From Eric Dumazet. 19) Fix several regressions added by the high rate accuracy changes to the htb packet scheduler. From Eric Dumazet. 20) Fix DMA'ing onto the stack in esd_usb2 and peak_usb CAN drivers, from Olivier Sobrie and Marc Kleine-Budde. 21) Fix unremovable network devices due to missing route pointer installation in the per-device ipv6 address list entries. From Gao feng. 22) Apply the tg3 5719 DMA workaround on 5720 chips as well, otherwise we get stalls. From Nithin Sujir. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (68 commits) net_sched: htb: do not mix 1ns and 64ns time units net: fix sk_buff head without data area tg3: Add read dma workaround for 5720 net: ethernet: xilinx_emaclite: set protocol selector bits when writing ANAR bnx2x: Fix bridged GSO for 57710/57711 chips net: fec: add fallback to random MAC address bnx2x: fix TCP offload for tunneling ipv4 over ipv6 ipv6: assign rt6_info to inet6_ifaddr in init_loopback net/mlx4_core: Keep VF assigned MAC in the PF admin table net/mlx4_en: Handle unassigned VF MAC address correctly net/mlx4_core: Return -EPROBE_DEFER when a VF is probed before PF is sufficiently initialized net/mlx4_en: Fix adaptive moderation cq update net: can: peak_usb: Do not do dma on the stack net: can: esd_usb2: Do not do dma on the stack net: can: kvaser_usb: fix reception on "USBcan Pro" and "USBcan R" type hardware. net_sched: restore "overhead xxx" handling net: force a reload of first item in hlist_nulls_for_each_entry_rcu hyperv: Fix vlan_proto setting in netvsc_recv_callback() team: fix port list dump for big number of ports list: introduce list_first_entry_or_null ...
2013-06-03Merge branch 'for-linus' of ↵Linus Torvalds1-0/+4
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 fixes from Martin Schwidefsky: "Recent bug fixes, one of them touches a common code file. It adds two #ifndef/#endif pairs to asm-generic/io.h to be able to override xlate_dev_kmem_ptr and xlate_dev_mem_ptr." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/pgtable: Fix gmap notifier address s390/dasd: fix handling of gone paths s390/pgtable: Fix check for pgste/storage key handling arch: s390: appldata: using strncpy() and strnlen() instead of sprintf() s390/smp: lost IPIs on cpu hotplug kernel: Fix s390 absolute memory access for /dev/mem s390/dma: do not call debug_dma after free
2013-06-03Merge branch 'for-3.10-fixes' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup Pull cgroup fixes from Tejun Heo: - Fix for yet another xattr bug which may lead to NULL deref. - A subtle bug in for_each_descendant_pre(). This bug requires quite specific conditions to trigger and isn't too likely to actually happen in the wild, but maybe that just makes it that much more nastier. - A warning message added for silly cgroup re-mount (not -o remount, but unmount followed by mount) behavior. * 'for-3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup: warn about mismatching options of a new mount of an existing hierarchy cgroup: fix a subtle bug in descendant pre-order walk cgroup: initialize xattr before calling d_instantiate()
2013-06-02net_sched: restore "overhead xxx" handlingEric Dumazet1-7/+11
commit 56b765b79 ("htb: improved accuracy at high rates") broke the "overhead xxx" handling, as well as the "linklayer atm" attribute. tc class add ... htb rate X ceil Y linklayer atm overhead 10 This patch restores the "overhead xxx" handling, for htb, tbf and act_police The "linklayer atm" thing needs a separate fix. Reported-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Vimalkumar <j.vimal@gmail.com> Cc: Jiri Pirko <jpirko@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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