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2014-01-14xtensa: avoid duplicate of IO range definitionsBaruch Siach3-9/+10
Define IO addresses in a single place, to make it easier to change for non-standard memory maps. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-01-14xtensa: fix ATOMCTL register documentationBaruch Siach1-1/+1
Make the WT entry match table 4-52 of the Xtensa ISA RM (RD-2012.5). Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-01-14xtensa: Enable irqs after cpu is set onlineKirill Tkhai1-1/+2
there is a small possibility that wake_up of softirq thread happens between local_irq_enable() and set_cpu_online(). In this case affinity of the thread changes to fallback affinity (i.e. CPU0). This may be a source of problems. The patch kills that possibility. Signed-off-by: Kirill Tkhai <tkhai@yandex.ru> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-01-14xtensa: ISS: raise network polling rate to 10 times/secMax Filippov1-1/+1
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-01-14xtensa: remove unused XTENSA_ISS_NETWORK Kconfig parameterMichael Opdenacker1-4/+0
This removes the XTENSA_ISS_NETWORK Kconfig parameter, which was no longer used anywhere in the source code and Makefiles. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-01-14xtensa: ISS: avoid simple_strtoul usageMax Filippov1-11/+11
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: Switch to sched_clock_register()Stephen Boyd1-2/+2
The 32 bit sched_clock interface now supports 64 bits. Upgrade to the 64 bit function to allow us to remove the 32 bit registration interface. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: implement CPU hotplugMax Filippov8-4/+248
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: add SMP supportMax Filippov24-199/+967
This is largely based on SMP code from the xtensa-2.6.29-smp tree by Piet Delaney, Marc Gauthier, Joe Taylor, Christian Zankel (and possibly other Tensilica folks). Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: add MX irqchipMax Filippov8-0/+261
MX is an interrupt distributor used in some SMP-capable xtensa configurations. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: clear timer IRQ unconditionally in its handlerMax Filippov1-0/+1
PIC irq_ack doesn't clear timer IRQ, because timer interrupt handler usually set up new timer by writing to ccompare register and thus clearing timer IRQ. However timer may not be set up in the IRQ handler, e.g. with tickless idle on SMP, or when CPU is going offline, leaving timer IRQ raised and making do_interrupt attempting to handle it forever. To fix this always write current value of ccompare SR chosen to be linux timer back to that SR on entry to timer interrupt handler. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: clean up do_interrupt/do_IRQMax Filippov2-20/+9
- set up irq registers and call irq_enter/irq_exit once for each kernel entry due to interrupt; - don't attempt to clear current IRQ in the do_interrupt, IRQ handler will take care of it; - find pending interrupt with highest priority before every ISR invocation. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: move built-in PIC to drivers/irqchipMax Filippov6-108/+165
Extract xtensa built-in interrupt controller implementation from xtensa/kernel/irq.c and move it to other irqchips, providing way to instantiate it from the device tree. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: move init_mmu declaration to mmu_context.hMax Filippov2-6/+7
Secondary CPUs need this declaration to initialize their MMUs. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: call check_s32c1i after trap_initMax Filippov1-11/+7
Otherwise exceptions may occur prior to exception handling mechanism initialization, resulting in silently dead system. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: update clockevent setup for SMPMax Filippov1-25/+29
Provide per-cpu ccount_timer objects and use them appropriately. Extract per-cpu clockevent setup function. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: mark ccount as continuous clocksourceBaruch Siach1-0/+1
This allows ccount to be used as highres timer. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: enable HAVE_IRQ_TIME_ACCOUNTINGMax Filippov1-0/+1
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: fix __delay for small loop countMax Filippov1-3/+6
Avoid __delay counter underflow for loop counts < 2. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: fix arch spinlock function namesMax Filippov2-14/+37
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: fix build warning in 64-bit build environmentMax Filippov1-2/+2
This fixes the following build warnings: arch/xtensa/mm/misc.S: Assembler messages: arch/xtensa/mm/misc.S:143: Warning: value 0xffffffff30000106 truncated to 0x30000106 arch/xtensa/mm/misc.S:197: Warning: value 0xffffffff30000106 truncated to 0x30000106 Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: remove NO_IRQ definitionsMax Filippov2-5/+0
These definitions (-1) were correct when used as a hardware IRQ number, but are incorrect as a mapped IRQ number. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: implement robust futex atomic uaccess opsBaruch Siach2-1/+147
This enables the set_robust_list(2) system call. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: ISS: clean up diagnostic, increase verbosityMax Filippov1-11/+12
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: ISS: always use fixed tuntap configMax Filippov1-14/+8
The code doesn't handle dynamic TAP interface allocation, so there's no point tracking this case. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: ISS: enable iss_net_set_macMax Filippov1-3/+2
This allows changing MAC address of the device. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: ISS: drop IP setup, clean up MAC setupMax Filippov1-46/+31
Without proper MAC setup network device doesn't work. IP setup is redundant and may be done with 'ip=...' kernel parameter. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: ISS: init network interface name before the probeMax Filippov1-7/+7
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: ISS: fix command line parameter nameMax Filippov1-1/+1
Now 'ethX=...' syntax can actually be used in kernel command line to specify network interfaces. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: ISS: clean up iss-network driverMax Filippov1-124/+52
No functional changes, remove dead/unused code, clean checkpatch warnings, replace strlen of constant strings with sizeof. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: remove trailing colons in asm statementMax Filippov1-1/+1
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2014-01-14xtensa: clean up include/asm/vectors.hMax Filippov1-9/+3
- drop unused PHYSICAL_MEMORY_ADDRESS and XC_PADDR - fix NMI_VECTOR_VADDR and INTLEVEL7_VECTOR_VADDR definitions: there should be no XCHAL_ prefix in them; - fix the following warning seen with gcc-4.8.1: arch/xtensa/include/asm/vectors.h:71:5: warning: "XCHAL_HAVE_VECBASE" is not defined [-Wundef] Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2013-12-30Linux 3.13-rc6v3.13-rc6Linus Torvalds1-1/+1
2013-12-29ARM: pxa: fix USB gadget driver compilation regressionLinus Walleij1-0/+2
After commit 88f718e3fa4d67f3a8dbe79a2f97d722323e4051 "ARM: pxa: delete the custom GPIO header" a compilation error was introduced in the PXA25x gadget driver. An attempt to fix the problem was made in commit b144e4ab1ef130e8bf30bcd3e529b7f35112c503 "usb: gadget: fix pxa25x compilation problems" by explictly stating the driver needs the <mach/hardware.h> header, which solved the compilation for a few boards, such as the pxa255-idp and its defconfig. However the Lubbock board has this special clause in drivers/usb/gadget/pxa25x_udc.c: This include file has an implicit dependency on <mach/irqs.h> having been included before <mach/lubbock.h> was included. Before commit 88f718e3fa4d67f3a8dbe79a2f97d722323e4051 "ARM: pxa: delete the custom GPIO header" this implicit dependency for the pxa25x_udc compile on the Lubbock was satisfied by <linux/gpio.h> implicitly including <mach/gpio.h> which was in turn including <mach/irqs.h>, apart from the earlier added <mach/hardware.h>. Fix this by having the PXA25x <mach/lubbock.h> explicitly include <mach/irqs.h>. Reported-by: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Greg Kroah-Hartmann <gregkh@linuxfoundation.org> Cc: Felipe Balbi <balbi@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com> Signed-off-by: Olof Johansson <olof@lixom.net>
2013-12-27ARM: OMAP2+: Fix LCD panel backlight regression for LDP legacy bootingTony Lindgren1-1/+6
Looks like the LCD panel on LDP has been broken quite a while, and recently got fixed by commit 0b2aa8bed3e1 (gpio: twl4030: Fix regression for twl gpio output). However, there's still an issue left where the panel backlight does not come on if the LCD drivers are built into the kernel. Fix the issue by registering the DPI LCD panel only after the twl4030 GPIO has probed. Reported-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com> [tony@atomide.com: updated per Tomi's comments] Signed-off-by: Tony Lindgren <tony@atomide.com>
2013-12-26ARM: OMAP2+: hwmod_data: fix missing OMAP_INTC_START in irq dataSuman Anna2-5/+5
Commit 7d7e1eb (ARM: OMAP2+: Prepare for irqs.h removal) and commit ec2c082 (ARM: OMAP2+: Remove hardcoded IRQs and enable SPARSE_IRQ) updated the way interrupts for OMAP2/3 devices are defined in the HWMOD data structures to being an index plus a fixed offset (defined by OMAP_INTC_START). Couple of irqs in the OMAP2/3 hwmod data were misconfigured completely as they were missing this OMAP_INTC_START relative offset. Add this offset back to fix the incorrect irq data for the following modules: OMAP2 - GPMC, RNG OMAP3 - GPMC, ISP MMU & IVA MMU Signed-off-by: Suman Anna <s-anna@ti.com> Fixes: 7d7e1eba7e92 ("ARM: OMAP2+: Prepare for irqs.h removal") Fixes: ec2c0825ca31 ("ARM: OMAP2+: Remove hardcoded IRQs and enable SPARSE_IRQ") Cc: Tony Lindgren <tony@atomide.com> Signed-off-by: Paul Walmsley <paul@pwsan.com>
2013-12-26ARM: DRA7: hwmod: Fix boot crash with DEBUG_LLRajendra Nayak1-1/+1
With commit '7dedd34: ARM: OMAP2+: hwmod: Fix a crash in _setup_reset() with DEBUG_LL' we moved from parsing cmdline to identify uart used for earlycon to using the requsite hwmod CONFIG_DEBUG_OMAPxUARTy FLAGS. On DRA7 though, we seem to be missing this flag, and atleast on the DRA7 EVM where we use uart1 for console, boot fails with DEBUG_LL enabled. Reported-by: Lokesh Vutla <lokeshvutla@ti.com> Tested-by: Lokesh Vutla <lokeshvutla@ti.com> # on a different base Signed-off-by: Rajendra Nayak <rnayak@ti.com> Fixes: 7dedd346941d ("ARM: OMAP2+: hwmod: Fix a crash in _setup_reset() with DEBUG_LL") Signed-off-by: Paul Walmsley <paul@pwsan.com>
2013-12-24auxvec.h: account for AT_HWCAP2 in AT_VECTOR_SIZE_BASEArd Biesheuvel1-1/+1
Commit 2171364d1a92 ("powerpc: Add HWCAP2 aux entry") introduced a new AT_ auxv entry type AT_HWCAP2 but failed to update AT_VECTOR_SIZE_BASE accordingly. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Fixes: 2171364d1a92 (powerpc: Add HWCAP2 aux entry) Cc: stable@vger.kernel.org Acked-by: Michael Neuling <michael@neuling.org> Cc: Nishanth Aravamudan <nacc@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-12-23selinux: selinux_setprocattr()->ptrace_parent() needs rcu_read_lock()Oleg Nesterov1-2/+2
selinux_setprocattr() does ptrace_parent(p) under task_lock(p), but task_struct->alloc_lock doesn't pin ->parent or ->ptrace, this looks confusing and triggers the "suspicious RCU usage" warning because ptrace_parent() does rcu_dereference_check(). And in theory this is wrong, spin_lock()->preempt_disable() doesn't necessarily imply rcu_read_lock() we need to access the ->parent. Reported-by: Evan McNabb <emcnabb@redhat.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Paul Moore <pmoore@redhat.com>
2013-12-23selinux: fix broken peer recv checkChad Hanson1-1/+3
Fix a broken networking check. Return an error if peer recv fails. If secmark is active and the packet recv succeeds the peer recv error is ignored. Signed-off-by: Chad Hanson <chanson@trustedcs.com> Cc: stable@vger.kernel.org Signed-off-by: Paul Moore <pmoore@redhat.com>
2013-12-23drm/ttm: Fix swapin regressionThomas Hellstrom1-1/+2
Commit "drm/ttm: Don't move non-existing data" didn't take the swapped-out corner case into account. This patch corrects that. Fixes blank screen after attempted suspend / hibernate on vmwgfx. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-12-23gpu: fix qxl missing crc32_leRandy Dunlap2-1/+2
Fix build error: qxl uses crc32 functions so it needs to select CRC32. Also use angle quotes around a kernel header file name. drivers/built-in.o: In function `qxl_display_read_client_monitors_config': (.text+0x19d754): undefined reference to `crc32_le' Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-12-22Linux 3.13-rc5v3.13-rc5Linus Torvalds1-1/+1
2013-12-22aio: clean up and fix aio_setup_ring page mappingLinus Torvalds1-35/+23
Since commit 36bc08cc01709 ("fs/aio: Add support to aio ring pages migration") the aio ring setup code has used a special per-ring backing inode for the page allocations, rather than just using random anonymous pages. However, rather than remembering the pages as it allocated them, it would allocate the pages, insert them into the file mapping (dirty, so that they couldn't be free'd), and then forget about them. And then to look them up again, it would mmap the mapping, and then use "get_user_pages()" to get back an array of the pages we just created. Now, not only is that incredibly inefficient, it also leaked all the pages if the mmap failed (which could happen due to excessive number of mappings, for example). So clean it all up, making it much more straightforward. Also remove some left-overs of the previous (broken) mm_populate() usage that was removed in commit d6c355c7dabc ("aio: fix race in ring buffer page lookup introduced by page migration support") but left the pointless and now misleading MAP_POPULATE flag around. Tested-and-acked-by: Benjamin LaHaise <bcrl@kvack.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-12-22powercap / RAPL: add support for ValleyView SocJacob Pan1-2/+11
This patch adds support for RAPL on Intel ValleyView based SoC platforms, such as Baytrail. Besides adding CPU ID, special energy unit encoding is handled for ValleyView. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-22PM / sleep: Fix memory leak in pm_vt_switch_unregister().Masami Ichikawa1-0/+1
kmemleak reported a memory leak as below. unreferenced object 0xffff880118f14700 (size 32): comm "swapper/0", pid 1, jiffies 4294877401 (age 123.283s) hex dump (first 32 bytes): 00 01 10 00 00 00 ad de 00 02 20 00 00 00 ad de .......... ..... 00 d4 d2 18 01 88 ff ff 01 00 00 00 00 04 00 00 ................ backtrace: [<ffffffff814edb1e>] kmemleak_alloc+0x4e/0xb0 [<ffffffff811889dc>] kmem_cache_alloc_trace+0x1ec/0x260 [<ffffffff810aba66>] pm_vt_switch_required+0x76/0xb0 [<ffffffff812f39f5>] register_framebuffer+0x195/0x320 [<ffffffff8130af18>] efifb_probe+0x718/0x780 [<ffffffff81391495>] platform_drv_probe+0x45/0xb0 [<ffffffff8138f407>] driver_probe_device+0x87/0x3a0 [<ffffffff8138f7f3>] __driver_attach+0x93/0xa0 [<ffffffff8138d413>] bus_for_each_dev+0x63/0xa0 [<ffffffff8138ee5e>] driver_attach+0x1e/0x20 [<ffffffff8138ea40>] bus_add_driver+0x180/0x250 [<ffffffff8138fe74>] driver_register+0x64/0xf0 [<ffffffff813913ba>] __platform_driver_register+0x4a/0x50 [<ffffffff8191e028>] efifb_driver_init+0x12/0x14 [<ffffffff8100214a>] do_one_initcall+0xfa/0x1b0 [<ffffffff818e40e0>] kernel_init_freeable+0x17b/0x201 In pm_vt_switch_required(), "entry" variable is allocated via kmalloc(). So, in pm_vt_switch_unregister(), it needs to call kfree() when object is deleted from list. Signed-off-by: Masami Ichikawa <masami256@gmail.com> Reviewed-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-22cpufreq: Use CONFIG_CPU_FREQ_DEFAULT_* to set initial policy for setpolicy ↵Jason Baron1-0/+6
drivers When configuring a default governor (via CONFIG_CPU_FREQ_DEFAULT_*) with the intel_pstate driver, the desired default policy is not properly set. For example, setting 'CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE' ends up with the 'powersave' policy being set. Fix by configuring the correct default policy, if either 'powersave' or 'performance' are requested. Otherwise, fallback to what the driver originally set via its 'init' routine. Signed-off-by: Jason Baron <jbaron@akamai.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-22cpufreq: remove sysfs files for CPUs which failed to come back after resumeViresh Kumar1-32/+31
There are cases where cpufreq_add_dev() may fail for some CPUs during system resume. With the current code we will still have sysfs cpufreq files for those CPUs and struct cpufreq_policy would be already freed for them. Hence any operation on those sysfs files would result in kernel warnings. Example of problems resulting from resume errors (from Bjørn Mork): WARNING: CPU: 0 PID: 6055 at fs/sysfs/file.c:343 sysfs_open_file+0x77/0x212() missing sysfs attribute operations for kobject: (null) Modules linked in: [stripped as irrelevant] CPU: 0 PID: 6055 Comm: grep Tainted: G D 3.13.0-rc2 #153 Hardware name: LENOVO 2776LEG/2776LEG, BIOS 6EET55WW (3.15 ) 12/19/2011 0000000000000009 ffff8802327ebb78 ffffffff81380b0e 0000000000000006 ffff8802327ebbc8 ffff8802327ebbb8 ffffffff81038635 0000000000000000 ffffffff811823c7 ffff88021a19e688 ffff88021a19e688 ffff8802302f9310 Call Trace: [<ffffffff81380b0e>] dump_stack+0x55/0x76 [<ffffffff81038635>] warn_slowpath_common+0x7c/0x96 [<ffffffff811823c7>] ? sysfs_open_file+0x77/0x212 [<ffffffff810386e3>] warn_slowpath_fmt+0x41/0x43 [<ffffffff81182dec>] ? sysfs_get_active+0x6b/0x82 [<ffffffff81182382>] ? sysfs_open_file+0x32/0x212 [<ffffffff811823c7>] sysfs_open_file+0x77/0x212 [<ffffffff81182350>] ? sysfs_schedule_callback+0x1ac/0x1ac [<ffffffff81122562>] do_dentry_open+0x17c/0x257 [<ffffffff8112267e>] finish_open+0x41/0x4f [<ffffffff81130225>] do_last+0x80c/0x9ba [<ffffffff8112dbbd>] ? inode_permission+0x40/0x42 [<ffffffff81130606>] path_openat+0x233/0x4a1 [<ffffffff81130b7e>] do_filp_open+0x35/0x85 [<ffffffff8113b787>] ? __alloc_fd+0x172/0x184 [<ffffffff811232ea>] do_sys_open+0x6b/0xfa [<ffffffff811233a7>] SyS_openat+0xf/0x11 [<ffffffff8138c812>] system_call_fastpath+0x16/0x1b To fix this, remove those sysfs files or put the associated kobject in case of such errors. Also, to make it simple, remove the cpufreq sysfs links from all the CPUs (except for the policy->cpu) during suspend, as that operation won't result in a loss of sysfs file permissions and we can create those links during resume just fine. Fixes: 5302c3fb2e62 ("cpufreq: Perform light-weight init/teardown during suspend/resume") Reported-and-tested-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: 3.12+ <stable@vger.kernel.org> # 3.12+ [rjw: Changelog] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-21aio/migratepages: make aio migrate pages saneBenjamin LaHaise3-15/+53
The arbitrary restriction on page counts offered by the core migrate_page_move_mapping() code results in rather suspicious looking fiddling with page reference counts in the aio_migratepage() operation. To fix this, make migrate_page_move_mapping() take an extra_count parameter that allows aio to tell the code about its own reference count on the page being migrated. While cleaning up aio_migratepage(), make it validate that the old page being passed in is actually what aio_migratepage() expects to prevent misbehaviour in the case of races. Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
2013-12-21aio: fix kioctx leak introduced by "aio: Fix a trinity splat"Benjamin LaHaise1-1/+2
e34ecee2ae791df674dfb466ce40692ca6218e43 reworked the percpu reference counting to correct a bug trinity found. Unfortunately, the change lead to kioctxes being leaked because there was no final reference count to put. Add that reference count back in to fix things. Signed-off-by: Benjamin LaHaise <bcrl@kvack.org> Cc: stable@vger.kernel.org
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