summaryrefslogtreecommitdiff
AgeCommit message (Collapse)Author
2013-11-06Merge branch 'cpu-bindings' into for-nextRob Herring
2013-11-06kbuild: replace unbounded sprintf call in modpostKees Cook
The modpost tool could overflow its stack buffer if someone was running with an insane shell environment. Regardless, it's technically a bug, so this fixes it to truncate the string instead of seg-faulting. Found by Coverity. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
2013-11-06kbuild, bloat-o-meter: fix static detectionAndi Kleen
Disable static detection: the static currently drops a lot of useful information including clones generated by gcc. Drop this. The statics will appear now without static. prefix. But remove the LTO .NUMBER postfixes that look ugly Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2013-11-06Kbuild: Handle longer symbols in kallsyms.cAndi Kleen
Also warn for too long symbols v2: Add missing newline. Use 255 max (Joe Perches) Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2013-11-06kbuild: Increase kallsyms max symbol lengthJoe Mario
[AK: This seems like a ticking time bomb even without LTO, so should be merged now. It causes very weird problems. Thanks to Joe for tracking them down.] With the added postfixes that LTO adds for local symbols, the longest name in the kernel overflows the namebuf[KSYM_NAME_LEN] array by two bytes. That name is: __pci_fixup_resumePCI_VENDOR_ID_SERVERWORKSPCI_DEVICE_ID_SERVERWORKS_HT1000SBquirk_disable_broadcom_boot_interrupt.1488004.672802 Double the max symbol name length. v2: Use 255 (Joe Perches) Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
2013-11-06scripts/kernel-doc: make unknown function prototype a Warning instead of an ↵Randy Dunlap
Error When scripts/kernel-doc cannot understand a function prototype, it had been generating a fatal error and stopping immediately. Make this a Warning instead of an Error and keep going. Note that this can happen if the kernel-doc notation that is being parsed is not actually a function prototype; maybe it's a struct or something else, so I added "function" to the warning message to try to make it clearer that scripts/kernel-doc is looking for a function prototype here. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Mark Brown <broonie@kernel.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
2013-11-06xen: remove deprecated IRQF_DISABLEDMichael Opdenacker
This patch proposes to remove the IRQF_DISABLED flag from drivers/xen code. It's a NOOP since 2.6.35 and it will be removed one day. Note that architecture dependent fixes for IRQF_DISABLED were already submitted through separate patches. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2013-11-06x86/xen: remove deprecated IRQF_DISABLEDMichael Opdenacker
This patch proposes to remove the IRQF_DISABLED flag from x86/xen code. It's a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2013-11-06perf/ftrace: Fix paranoid level for enabling function tracerSteven Rostedt
The current default perf paranoid level is "1" which has "perf_paranoid_kernel()" return false, and giving any operations that use it, access to normal users. Unfortunately, this includes function tracing and normal users should not be allowed to enable function tracing by default. The proper level is defined at "-1" (full perf access), which "perf_paranoid_tracepoint_raw()" will only give access to. Use that check instead for enabling function tracing. Reported-by: Dave Jones <davej@redhat.com> Reported-by: Vince Weaver <vincent.weaver@maine.edu> Tested-by: Vince Weaver <vincent.weaver@maine.edu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: stable@vger.kernel.org # 3.4+ CVE: CVE-2013-2930 Fixes: ced39002f5ea ("ftrace, perf: Add support to use function tracepoint in perf") Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2013-11-06uprobes: Export write_opcode() as uprobe_write_opcode()Oleg Nesterov
set_swbp() and set_orig_insn() are __weak, but this is pointless because write_opcode() is static. Export write_opcode() as uprobe_write_opcode() for the upcoming arm port, this way it can actually override set_swbp() and use __opcode_to_mem_arm(bpinsn) instead if UPROBE_SWBP_INSN. Signed-off-by: Oleg Nesterov <oleg@redhat.com>
2013-11-06uprobes: Introduce arch_uprobe->ixolOleg Nesterov
Currently xol_get_insn_slot() assumes that we should simply copy arch_uprobe->insn[] which is (ignoring arch_uprobe_analyze_insn) just the copy of the original insn. This is not true for arm which needs to create another insn to execute it out-of-line. So this patch simply adds the new member, ->ixol into the union. This doesn't make any difference for x86 and powerpc, but arm can divorce insn/ixol and initialize the correct xol insn in arch_uprobe_analyze_insn(). Signed-off-by: Oleg Nesterov <oleg@redhat.com>
2013-11-06uprobes: Kill module_init() and module_exit()Oleg Nesterov
Turn module_init() into __initcall() and kill module_exit(). This code can't be compiled as a module so these module_*() calls only add the confusion, especially if arch-dependant code needs its own initialization hooks. Signed-off-by: Oleg Nesterov <oleg@redhat.com>
2013-11-06uprobes: Move function declarations out of archDavid A. Long
Move the function declarations from the arch headers to the common header, since only the function bodies are architecture-specific. These changes are from Vincent Rabin's uprobes patch. [ oleg: update arch/powerpc/include/asm/uprobes.h ] Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: David A. Long <dave.long@linaro.org> Signed-off-by: Oleg Nesterov <oleg@redhat.com>
2013-11-06xfs: add tracepoints to AGF/AGI read operationsDave Chinner
To help track down AGI/AGF lock ordering issues, I added these tracepoints to tell us when an AGI or AGF is read and locked. With these we can now determine if the lock ordering goes wrong from tracing captures. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ben Myers <bpm@sgi.com>
2013-11-06xfs: trace AIL manipulationsDave Chinner
I debugging a log tail issue on a RHEL6 kernel, I added these trace points to trace log items being added, moved and removed in the AIL and how that affected the log tail LSN that was written to the log. They were very helpful in that they immediately identified the cause of the problem being seen. Hence I'd like to always have them available for use. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ben Myers <bpm@sgi.com>
2013-11-06x86, hyperv: Move a variable to avoid an unused variable warningH. Peter Anvin
The variable hv_lapic_frequency causes an unused variable warning if CONFIG_X86_LOCAL_APIC is disabled. Since the variable is only used inside a small if statement, move the declaration of that variable into the if statement itself. Cc: K. Y. Srinivasan <kys@microsoft.com> Link: http://lkml.kernel.org/r/1381444224-3303-1-git-send-email-kys@microsoft.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-11-06drm/i915/vlv: use per-pipe backlight controls v2Jesse Barnes
With the connector and pipe passed around, we can now set the backlight on the right pipe on VLV/BYT. v2: drop combination mode check for VLV (Jani) add save/restore code for VLV backlight regs (Jani) check for existing modulation freq when initializing backlight regs (Jani) Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=67245 Tested-by: Joe Konno <joe.konno@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-11-06ALSA: lx6464es: Fix pointer cast compile warningsTakashi Iwai
The warnings are really harmless but annoying. Since they are only about debug prints, and it's at most 32bit DMA, let's just cast to unsigned long. sound/pci/lx6464es/lx6464es.c:457:22: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] sound/pci/lx6464es/lx_core.c:1195:21: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-11-06ALSA: cmi8328: Fix compile warnings without CONFIG_PMTakashi Iwai
Just add an ifdef CONFIG_PM to shut up the warnings: sound/isa/cmi8328.c:129:13: warning: ‘snd_cmi8328_cfg_save’ defined but not used [-Wunused-function] sound/isa/cmi8328.c:136:13: warning: ‘snd_cmi8328_cfg_restore’ defined but not used [-Wunused-function] Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-11-06drm/i915: make backlight functions take a connectorJesse Barnes
On VLV/BYT, backlight controls a per-pipe, so when adjusting the backlight we need to pass the correct info. So make the externally visible backlight functions take a connector argument, which can be used internally to figure out the pipe backlight to adjust. v2: make connector pipe lookup check for NULL crtc (Jani) fixup connector check in ASLE code (Jani) v3: make sure we take the mode config lock around lookups (Daniel) v4: fix double unlock in panel_get_brightness (Daniel) v5: push ASLE work into a work queue (Daniel) v6: separate ASLE work to a prep patch, rebase (Jani) Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-11-06drm/i915: move opregion asle request handling to a work queueJani Nikula
Doing this has been long overdue anyway, but now we really need it in preparation for per connector backlight handling. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-11-06MIPS: remove duplicate defineMichael Opdenacker
This patch removes a duplicate define from arch/mips/boot/ecoff.h Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/6081/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-11-06s390/scm_blk: fix endless loop for requests != REQ_TYPE_FSSteffen Maier
The while loop only peeks at the top request in the queue but does not yet consume it. Since we only handle fs requests, we need to dequeue and complete all other request command types with error just in case we would ever receive such an unforeseen request. Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-11-06drm/ttm: Fix memory type compatibility checkThomas Hellstrom
Also check the busy placements before deciding to move a buffer object. Failing to do this may result in a completely unneccessary move within a single memory type. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com> Cc: stable@vger.kernel.org
2013-11-06drm/ttm: Fix ttm_bo_move_memcpyThomas Hellstrom
All error paths will want to keep the mm node, so handle this at the function exit. This fixes an ioremap failure error path. Also add some comments to make the function a bit easier to understand. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com> Cc: stable@vger.kernel.org
2013-11-06drm/ttm: Handle in-memory region copiesJakob Bornecrantz
Fix the case where the ttm pointer may be NULL causing a NULL pointer dereference. Signed-off-by: Jakob Bornecrantz <jakob@vmware.com> Signed-off-by: Thomas Hellström <thellstrom@vmware.com> Cc: stable@vger.kernel.org
2013-11-06drm/ttm: Make NO_EVICT bos available to shrinkers pending destructionThomas Hellstrom
NO_EVICT bos that are not idle when all references are dropped are put on the delayed destroy list. However, since they are not on LRU lists, they are not available to shrinkers at that point, and buffers on the delayed destroy list are not checked very often for idle. So when these buffers are put on the delayed destroy list, clear the NO_EVICT flag and put them on the right LRU list. This way they are immediately available for eviction or shrinkers and will not cause false OOMS. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
2013-11-06drm/ttm: Allow vm fault retriesThomas Hellstrom
Make use of the FAULT_FLAG_ALLOW_RETRY flag to allow dropping the mmap_sem while waiting for bo idle. FAULT_FLAG_ALLOW_RETRY appears to be primarily designed for disk waits but should work just as fine for GPU waits.. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
2013-11-06drm/vmwgfx: Use the linux DMA api to get valid device addresses of pagesThomas Hellstrom
The code handles three different cases: 1) physical page addresses. The ttm page array is used. 2) DMA subsystem addresses. A scatter-gather list is used. 3) Coherent pages. The ttm dma pool is used, together with the dma_ttm array os dma_addr_t Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
2013-11-06drm/ttm: Enable the dma page pool also for intel IOMMUsThomas Hellstrom
Used by the vmwgfx driver Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2013-11-06arm64: locks: Remove CONFIG_GENERIC_LOCKBREAKCatalin Marinas
Commit 52ea2a560a9d (arm64: locks: introduce ticket-based spinlock implementation) introduces the arch_spin_is_contended() function making CONFIG_GENERIC_LOCKBREAK unnecessary. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Will Deacon <will.deacon@arm.com>
2013-11-06ipv6: Fix possible ipv6 seqlock deadlockJohn Stultz
While enabling lockdep on seqlocks, I ran across the warning below caused by the ipv6 stats being updated in both irq and non-irq context. This patch changes from IP6_INC_STATS_BH to IP6_INC_STATS (suggested by Eric Dumazet) to resolve this problem. [ 11.120383] ================================= [ 11.121024] [ INFO: inconsistent lock state ] [ 11.121663] 3.12.0-rc1+ #68 Not tainted [ 11.122229] --------------------------------- [ 11.122867] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 11.123741] init/4483 [HC0[0]:SC1[3]:HE1:SE0] takes: [ 11.124505] (&stats->syncp.seq#6){+.?...}, at: [<c1ab80c2>] ndisc_send_ns+0xe2/0x130 [ 11.125736] {SOFTIRQ-ON-W} state was registered at: [ 11.126447] [<c10e0eb7>] __lock_acquire+0x5c7/0x1af0 [ 11.127222] [<c10e2996>] lock_acquire+0x96/0xd0 [ 11.127925] [<c1a9a2c3>] write_seqcount_begin+0x33/0x40 [ 11.128766] [<c1a9aa03>] ip6_dst_lookup_tail+0x3a3/0x460 [ 11.129582] [<c1a9e0ce>] ip6_dst_lookup_flow+0x2e/0x80 [ 11.130014] [<c1ad18e0>] ip6_datagram_connect+0x150/0x4e0 [ 11.130014] [<c1a4d0b5>] inet_dgram_connect+0x25/0x70 [ 11.130014] [<c198dd61>] SYSC_connect+0xa1/0xc0 [ 11.130014] [<c198f571>] SyS_connect+0x11/0x20 [ 11.130014] [<c198fe6b>] SyS_socketcall+0x12b/0x300 [ 11.130014] [<c1bbf880>] syscall_call+0x7/0xb [ 11.130014] irq event stamp: 1184 [ 11.130014] hardirqs last enabled at (1184): [<c1086901>] local_bh_enable+0x71/0x110 [ 11.130014] hardirqs last disabled at (1183): [<c10868cd>] local_bh_enable+0x3d/0x110 [ 11.130014] softirqs last enabled at (0): [<c108014d>] copy_process.part.42+0x45d/0x11a0 [ 11.130014] softirqs last disabled at (1147): [<c1086e05>] irq_exit+0xa5/0xb0 [ 11.130014] [ 11.130014] other info that might help us debug this: [ 11.130014] Possible unsafe locking scenario: [ 11.130014] [ 11.130014] CPU0 [ 11.130014] ---- [ 11.130014] lock(&stats->syncp.seq#6); [ 11.130014] <Interrupt> [ 11.130014] lock(&stats->syncp.seq#6); [ 11.130014] [ 11.130014] *** DEADLOCK *** [ 11.130014] [ 11.130014] 3 locks held by init/4483: [ 11.130014] #0: (rcu_read_lock){.+.+..}, at: [<c109363c>] SyS_setpriority+0x4c/0x620 [ 11.130014] #1: (((&ifa->dad_timer))){+.-...}, at: [<c108c1c0>] call_timer_fn+0x0/0xf0 [ 11.130014] #2: (rcu_read_lock){.+.+..}, at: [<c1ab6494>] ndisc_send_skb+0x54/0x5d0 [ 11.130014] [ 11.130014] stack backtrace: [ 11.130014] CPU: 0 PID: 4483 Comm: init Not tainted 3.12.0-rc1+ #68 [ 11.130014] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.130014] 00000000 00000000 c55e5c10 c1bb0e71 c57128b0 c55e5c4c c1badf79 c1ec1123 [ 11.130014] c1ec1484 00001183 00000000 00000000 00000001 00000003 00000001 00000000 [ 11.130014] c1ec1484 00000004 c5712dcc 00000000 c55e5c84 c10de492 00000004 c10755f2 [ 11.130014] Call Trace: [ 11.130014] [<c1bb0e71>] dump_stack+0x4b/0x66 [ 11.130014] [<c1badf79>] print_usage_bug+0x1d3/0x1dd [ 11.130014] [<c10de492>] mark_lock+0x282/0x2f0 [ 11.130014] [<c10755f2>] ? kvm_clock_read+0x22/0x30 [ 11.130014] [<c10dd8b0>] ? check_usage_backwards+0x150/0x150 [ 11.130014] [<c10e0e74>] __lock_acquire+0x584/0x1af0 [ 11.130014] [<c10b1baf>] ? sched_clock_cpu+0xef/0x190 [ 11.130014] [<c10de58c>] ? mark_held_locks+0x8c/0xf0 [ 11.130014] [<c10e2996>] lock_acquire+0x96/0xd0 [ 11.130014] [<c1ab80c2>] ? ndisc_send_ns+0xe2/0x130 [ 11.130014] [<c1ab66d3>] ndisc_send_skb+0x293/0x5d0 [ 11.130014] [<c1ab80c2>] ? ndisc_send_ns+0xe2/0x130 [ 11.130014] [<c1ab80c2>] ndisc_send_ns+0xe2/0x130 [ 11.130014] [<c108cc32>] ? mod_timer+0xf2/0x160 [ 11.130014] [<c1aa706e>] ? addrconf_dad_timer+0xce/0x150 [ 11.130014] [<c1aa70aa>] addrconf_dad_timer+0x10a/0x150 [ 11.130014] [<c1aa6fa0>] ? addrconf_dad_completed+0x1c0/0x1c0 [ 11.130014] [<c108c233>] call_timer_fn+0x73/0xf0 [ 11.130014] [<c108c1c0>] ? __internal_add_timer+0xb0/0xb0 [ 11.130014] [<c1aa6fa0>] ? addrconf_dad_completed+0x1c0/0x1c0 [ 11.130014] [<c108c5b1>] run_timer_softirq+0x141/0x1e0 [ 11.130014] [<c1086b20>] ? __do_softirq+0x70/0x1b0 [ 11.130014] [<c1086b70>] __do_softirq+0xc0/0x1b0 [ 11.130014] [<c1086e05>] irq_exit+0xa5/0xb0 [ 11.130014] [<c106cfd5>] smp_apic_timer_interrupt+0x35/0x50 [ 11.130014] [<c1bbfbca>] apic_timer_interrupt+0x32/0x38 [ 11.130014] [<c10936ed>] ? SyS_setpriority+0xfd/0x620 [ 11.130014] [<c10e26c9>] ? lock_release+0x9/0x240 [ 11.130014] [<c10936d7>] ? SyS_setpriority+0xe7/0x620 [ 11.130014] [<c1bbee6d>] ? _raw_read_unlock+0x1d/0x30 [ 11.130014] [<c1093701>] SyS_setpriority+0x111/0x620 [ 11.130014] [<c109363c>] ? SyS_setpriority+0x4c/0x620 [ 11.130014] [<c1bbf880>] syscall_call+0x7/0xb Signed-off-by: John Stultz <john.stultz@linaro.org> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: "David S. Miller" <davem@davemloft.net> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: James Morris <jmorris@namei.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Patrick McHardy <kaber@trash.net> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: netdev@vger.kernel.org Link: http://lkml.kernel.org/r/1381186321-4906-5-git-send-email-john.stultz@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06cpuset: Fix potential deadlock w/ set_mems_allowedJohn Stultz
After adding lockdep support to seqlock/seqcount structures, I started seeing the following warning: [ 1.070907] ====================================================== [ 1.072015] [ INFO: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected ] [ 1.073181] 3.11.0+ #67 Not tainted [ 1.073801] ------------------------------------------------------ [ 1.074882] kworker/u4:2/708 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: [ 1.076088] (&p->mems_allowed_seq){+.+...}, at: [<ffffffff81187d7f>] new_slab+0x5f/0x280 [ 1.077572] [ 1.077572] and this task is already holding: [ 1.078593] (&(&q->__queue_lock)->rlock){..-...}, at: [<ffffffff81339f03>] blk_execute_rq_nowait+0x53/0xf0 [ 1.080042] which would create a new lock dependency: [ 1.080042] (&(&q->__queue_lock)->rlock){..-...} -> (&p->mems_allowed_seq){+.+...} [ 1.080042] [ 1.080042] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 1.080042] (&(&q->__queue_lock)->rlock){..-...} [ 1.080042] ... which became SOFTIRQ-irq-safe at: [ 1.080042] [<ffffffff810ec179>] __lock_acquire+0x5b9/0x1db0 [ 1.080042] [<ffffffff810edfe5>] lock_acquire+0x95/0x130 [ 1.080042] [<ffffffff818968a1>] _raw_spin_lock+0x41/0x80 [ 1.080042] [<ffffffff81560c9e>] scsi_device_unbusy+0x7e/0xd0 [ 1.080042] [<ffffffff8155a612>] scsi_finish_command+0x32/0xf0 [ 1.080042] [<ffffffff81560e91>] scsi_softirq_done+0xa1/0x130 [ 1.080042] [<ffffffff8133b0f3>] blk_done_softirq+0x73/0x90 [ 1.080042] [<ffffffff81095dc0>] __do_softirq+0x110/0x2f0 [ 1.080042] [<ffffffff81095fcd>] run_ksoftirqd+0x2d/0x60 [ 1.080042] [<ffffffff810bc506>] smpboot_thread_fn+0x156/0x1e0 [ 1.080042] [<ffffffff810b3916>] kthread+0xd6/0xe0 [ 1.080042] [<ffffffff818980ac>] ret_from_fork+0x7c/0xb0 [ 1.080042] [ 1.080042] to a SOFTIRQ-irq-unsafe lock: [ 1.080042] (&p->mems_allowed_seq){+.+...} [ 1.080042] ... which became SOFTIRQ-irq-unsafe at: [ 1.080042] ... [<ffffffff810ec1d3>] __lock_acquire+0x613/0x1db0 [ 1.080042] [<ffffffff810edfe5>] lock_acquire+0x95/0x130 [ 1.080042] [<ffffffff810b3df2>] kthreadd+0x82/0x180 [ 1.080042] [<ffffffff818980ac>] ret_from_fork+0x7c/0xb0 [ 1.080042] [ 1.080042] other info that might help us debug this: [ 1.080042] [ 1.080042] Possible interrupt unsafe locking scenario: [ 1.080042] [ 1.080042] CPU0 CPU1 [ 1.080042] ---- ---- [ 1.080042] lock(&p->mems_allowed_seq); [ 1.080042] local_irq_disable(); [ 1.080042] lock(&(&q->__queue_lock)->rlock); [ 1.080042] lock(&p->mems_allowed_seq); [ 1.080042] <Interrupt> [ 1.080042] lock(&(&q->__queue_lock)->rlock); [ 1.080042] [ 1.080042] *** DEADLOCK *** The issue stems from the kthreadd() function calling set_mems_allowed with irqs enabled. While its possibly unlikely for the actual deadlock to trigger, a fix is fairly simple: disable irqs before taking the mems_allowed_seq lock. Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Li Zefan <lizefan@huawei.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: netdev@vger.kernel.org Link: http://lkml.kernel.org/r/1381186321-4906-4-git-send-email-john.stultz@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06seqcount: Add lockdep functionality to seqcount/seqlock structuresJohn Stultz
Currently seqlocks and seqcounts don't support lockdep. After running across a seqcount related deadlock in the timekeeping code, I used a less-refined and more focused variant of this patch to narrow down the cause of the issue. This is a first-pass attempt to properly enable lockdep functionality on seqlocks and seqcounts. Since seqcounts are used in the vdso gettimeofday code, I've provided non-lockdep accessors for those needs. I've also handled one case where there were nested seqlock writers and there may be more edge cases. Comments and feedback would be appreciated! Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Li Zefan <lizefan@huawei.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: netdev@vger.kernel.org Link: http://lkml.kernel.org/r/1381186321-4906-3-git-send-email-john.stultz@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06net: Explicitly initialize u64_stats_sync structures for lockdepJohn Stultz
In order to enable lockdep on seqcount/seqlock structures, we must explicitly initialize any locks. The u64_stats_sync structure, uses a seqcount, and thus we need to introduce a u64_stats_init() function and use it to initialize the structure. This unfortunately adds a lot of fairly trivial initialization code to a number of drivers. But the benefit of ensuring correctness makes this worth while. Because these changes are required for lockdep to be enabled, and the changes are quite trivial, I've not yet split this patch out into 30-some separate patches, as I figured it would be better to get the various maintainers thoughts on how to best merge this change along with the seqcount lockdep enablement. Feedback would be appreciated! Signed-off-by: John Stultz <john.stultz@linaro.org> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: "David S. Miller" <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: James Morris <jmorris@namei.org> Cc: Jesse Gross <jesse@nicira.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Mirko Lindner <mlindner@marvell.com> Cc: Patrick McHardy <kaber@trash.net> Cc: Roger Luethi <rl@hellgate.ch> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Simon Horman <horms@verge.net.au> Cc: Stephen Hemminger <stephen@networkplumber.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Wensong Zhang <wensong@linux-vs.org> Cc: netdev@vger.kernel.org Link: http://lkml.kernel.org/r/1381186321-4906-2-git-send-email-john.stultz@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06sched: Remove unnecessary iteration over sched domains to update nr_busy_cpusPreeti U Murthy
nr_busy_cpus parameter is used by nohz_kick_needed() to find out the number of busy cpus in a sched domain which has SD_SHARE_PKG_RESOURCES flag set. Therefore instead of updating nr_busy_cpus at every level of sched domain, since it is irrelevant, we can update this parameter only at the parent domain of the sd which has this flag set. Introduce a per-cpu parameter sd_busy which represents this parent domain. In nohz_kick_needed() we directly query the nr_busy_cpus parameter associated with the groups of sd_busy. By associating sd_busy with the highest domain which has SD_SHARE_PKG_RESOURCES flag set, we cover all lower level domains which could have this flag set and trigger nohz_idle_balancing if any of the levels have more than one busy cpu. sd_busy is irrelevant for asymmetric load balancing. However sd_asym has been introduced to represent the highest sched domain which has SD_ASYM_PACKING flag set so that it can be queried directly when required. While we are at it, we might as well change the nohz_idle parameter to be updated at the sd_busy domain level alone and not the base domain level of a CPU. This will unify the concept of busy cpus at just one level of sched domain where it is currently used. Signed-off-by: Preeti U Murthy<preeti@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: svaidy@linux.vnet.ibm.com Cc: vincent.guittot@linaro.org Cc: bitbucket@online.de Cc: benh@kernel.crashing.org Cc: anton@samba.org Cc: Morten.Rasmussen@arm.com Cc: pjt@google.com Cc: peterz@infradead.org Cc: mikey@neuling.org Link: http://lkml.kernel.org/r/20131030031252.23426.4417.stgit@preeti.in.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06sched: Fix asymmetric scheduling for POWER7Vaidyanathan Srinivasan
Asymmetric scheduling within a core is a scheduler loadbalancing feature that is triggered when SD_ASYM_PACKING flag is set. The goal for the load balancer is to move tasks to lower order idle SMT threads within a core on a POWER7 system. In nohz_kick_needed(), we intend to check if our sched domain (core) is completely busy or we have idle cpu. The following check for SD_ASYM_PACKING: (cpumask_first_and(nohz.idle_cpus_mask, sched_domain_span(sd)) < cpu) already covers the case of checking if the domain has an idle cpu, because cpumask_first_and() will not yield any set bits if this domain has no idle cpu. Hence, nr_busy check against group weight can be removed. Reported-by: Michael Neuling <michael.neuling@au1.ibm.com> Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Tested-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: vincent.guittot@linaro.org Cc: bitbucket@online.de Cc: benh@kernel.crashing.org Cc: anton@samba.org Cc: Morten.Rasmussen@arm.com Cc: pjt@google.com Link: http://lkml.kernel.org/r/20131030031242.23426.13019.stgit@preeti.in.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06perf/x86/intel: Add Ivy Bridge-EP uncore IRP box supportYan, Zheng
Unlike other uncore boxes, IRP boxes live in PCI buses with no UBOX device. For PCI bus without UBOX device, we find the next bus that has UBOX device and use its 'bus to socket' mapping. Besides the counter/control registers in IRP boxes are not properly aligned. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: eranian@google.com Cc: "Yan Zheng" <zheng.z.yan@intel.com> Link: http://lkml.kernel.org/r/1383197815-17706-2-git-send-email-zheng.z.yan@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06perf/x86/intel/uncore: Add filter support for IvyBridge-EP QPI boxesYan, Zheng
The encoding for filter registers of IvyBridge-EP uncore QPI boxes is completely the same as SandyBridge-EP. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: eranian@google.com Cc: "Yan Zheng" <zheng.z.yan@intel.com> Link: http://lkml.kernel.org/r/1383197815-17706-1-git-send-email-zheng.z.yan@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06perf: Factor out strncpy() in perf_event_mmap_event()Oleg Nesterov
While this is really minor, but strncpy() does the unnecessary zero-padding till the end of tmp[16] and it is called every time we are going to use the string literal. Turn these strncpy()'s into the single strlcpy() under the new label, saves 72 bytes. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20131017182417.GA17753@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06tools/perf: Add required memory barriersPeter Zijlstra
To match patch bf378d341e48 ("perf: Fix perf ring buffer memory ordering") change userspace to also adhere to the ordering outlined. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Michael Neuling <mikey@neuling.org> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: james.hogan@imgtec.com Cc: Vince Weaver <vince@deater.net> Cc: Victor Kaplansky <VICTORK@il.ibm.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Anton Blanchard <anton@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Michael Ellerman <michael@ellerman.id.au> Link: http://lkml.kernel.org/r/20131030104246.GH16117@laptop.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06perf: Fix arch_perf_out_copy_user defaultPeter Zijlstra
The arch_perf_output_copy_user() default of __copy_from_user_inatomic() returns bytes not copied, while all other argument functions given DEFINE_OUTPUT_COPY() return bytes copied. Since copy_from_user_nmi() is the odd duck out by returning bytes copied where all other *copy_{to,from}* functions return bytes not copied, change it over and ammend DEFINE_OUTPUT_COPY() to expect bytes not copied. Oddly enough DEFINE_OUTPUT_COPY() already returned bytes not copied while expecting its worker functions to return bytes copied. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Acked-by: will.deacon@arm.com Cc: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/20131030201622.GR16117@laptop.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06perf: Update a stale commentPeter Zijlstra
Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Michael Ellerman <michael@ellerman.id.au> Cc: Michael Neuling <mikey@neuling.org> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: james.hogan@imgtec.com Cc: Vince Weaver <vince@deater.net> Cc: Victor Kaplansky <VICTORK@il.ibm.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Anton Blanchard <anton@samba.org> Link: http://lkml.kernel.org/n/tip-9s5mze78gmlz19agt39i8rii@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06perf: Optimize perf_output_begin() -- address calculationPeter Zijlstra
Rewrite the handle address calculation code to be clearer. Saves 8 bytes on x86_64-defconfig. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Michael Ellerman <michael@ellerman.id.au> Cc: Michael Neuling <mikey@neuling.org> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: james.hogan@imgtec.com Cc: Vince Weaver <vince@deater.net> Cc: Victor Kaplansky <VICTORK@il.ibm.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Anton Blanchard <anton@samba.org> Link: http://lkml.kernel.org/n/tip-3trb2n2henb9m27tncef3ag7@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06perf: Optimize perf_output_begin() -- lost_event casePeter Zijlstra
Avoid touching the lost_event and sample_data cachelines twince. Its not like we end up doing less work, but it might help to keep all accesses to these cachelines in one place. Due to code shuffle, this looses 4 bytes on x86_64-defconfig. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Michael Ellerman <michael@ellerman.id.au> Cc: Michael Neuling <mikey@neuling.org> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: james.hogan@imgtec.com Cc: Vince Weaver <vince@deater.net> Cc: Victor Kaplansky <VICTORK@il.ibm.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Anton Blanchard <anton@samba.org> Link: http://lkml.kernel.org/n/tip-zfxnc58qxj0eawdoj31hhupv@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06perf: Optimize perf_output_begin()Peter Zijlstra
There's no point in re-doing the memory-barrier when we fail the cmpxchg(). Also placing it after the space reservation loop makes it clearer it only separates the userpage->tail read from the data stores. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Michael Ellerman <michael@ellerman.id.au> Cc: Michael Neuling <mikey@neuling.org> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: james.hogan@imgtec.com Cc: Vince Weaver <vince@deater.net> Cc: Victor Kaplansky <VICTORK@il.ibm.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Anton Blanchard <anton@samba.org> Link: http://lkml.kernel.org/n/tip-c19u6egfldyx86tpyc3zgkw9@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06perf: Add unlikely() to the ring-buffer codePeter Zijlstra
Add unlikely() annotations to 'slow' paths: When having a sampling event but no output buffer; you have bigger issues -- also the bail is still faster than actually doing the work. When having a sampling event but a control page only buffer, you have bigger issues -- again the bail is still faster than actually doing work. Optimize for the case where you're not loosing events -- again, not doing the work is still faster but make sure that when you have to actually do work its as fast as possible. The typical watermark is 1/2 the buffer size, so most events will not take this path. Shrinks perf_output_begin() by 16 bytes on x86_64-defconfig. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Michael Ellerman <michael@ellerman.id.au> Cc: Michael Neuling <mikey@neuling.org> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: james.hogan@imgtec.com Cc: Vince Weaver <vince@deater.net> Cc: Victor Kaplansky <VICTORK@il.ibm.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Anton Blanchard <anton@samba.org> Link: http://lkml.kernel.org/n/tip-wlg3jew3qnutm8opd0hyeuwn@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06perf: Simplify the ring-buffer codePeter Zijlstra
By using CIRC_SPACE() we can obviate the need for perf_output_space(). Shrinks the size of perf_output_begin() by 17 bytes on x86_64-defconfig. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Michael Ellerman <michael@ellerman.id.au> Cc: Michael Neuling <mikey@neuling.org> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: james.hogan@imgtec.com Cc: Vince Weaver <vince@deater.net> Cc: Victor Kaplansky <VICTORK@il.ibm.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Anton Blanchard <anton@samba.org> Link: http://lkml.kernel.org/n/tip-vtb0xb0llebmsdlfn1v5vtfj@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-11-06ALSA: HDA - Limit mic boost and add mute LED for an HP machineDavid Henningsson
This machine has a mute LED as well as a noisy internal mic. Hence it needs quirks for both limiting the mic boost as well as enabling the LED. BugLink: https://bugs.launchpad.net/bugs/1248476 Signed-off-by: David Henningsson <david.henningsson@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-11-06ASoC: rcar: remove un-needed select from KconfigKuninori Morimoto
config RCAR_CLK_ADG is not exist Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Mark Brown <broonie@linaro.org>
generated by cgit (git 2.34.1) at 2025-09-17 02:11:36 +0000