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* sparc64: Support kmemleak.David S. Miller2010-04-13
| | | | | | Only missing thing was an _sdata marker in vmlinux.lds.S Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Add function graph tracer support.David S. Miller2010-04-13
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Give a stack frame to the ftrace call sites.David S. Miller2010-04-13
| | | | | | | | | | | It's the only way we'll be able to implement the function graph tracer properly. A positive is that we no longer have to worry about the linker over-optimizing the tail call, since we don't use a tail call any more. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Use a seperate counter for timer interrupts and NMI checks, like x86.David S. Miller2010-04-13
| | | | | | | | | This keeps us from having to use kstat_irqs_cpu() from the NMI handler, the former of which is a profiled function. Instead we use a currently empty slot in the cpu_data Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Remove profiling from some low-level bits.David S. Miller2010-04-13
| | | | | | | These include the timer implementation, perf events support, and the performance counter register (pcr) programming layer. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Kill unnecessary static on local var in ftrace_call_replace().David S. Miller2010-04-13
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Kill CONFIG_STACK_DEBUG code.David S. Miller2010-04-13
| | | | | | The generic stack tracer does this job just as well. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Add HAVE_FUNCTION_TRACE_MCOUNT_TEST and tidy up.David S. Miller2010-04-13
| | | | | | | | | | | | | | Check function_trace_stop at ftrace_caller Toss mcount_call and dummy call of ftrace_stub, unnecessary. Document problems we'll have if the final kernel image link ever turns on relaxation. Properly size 'ftrace_call' so it looks right when inspecting instructions under gdb et al. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Adjust __raw_local_irq_save() to cooperate in NMIs.David S. Miller2010-04-13
| | | | | | | | | | | | | | | | | If we are in an NMI then doing a plain raw_local_irq_disable() will write PIL_NORMAL_MAX into %pil, which is lower than PIL_NMI, and thus we'll re-enable NMIs and recurse. Doing a simple: %pil = %pil | PIL_NORMAL_MAX does what we want, if we're already at PIL_NMI (15) we leave it at that setting, else we set it to PIL_NORMAL_MAX (14). This should get the function tracer working on sparc64. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Use kstack_valid() in die_if_kernel().David S. Miller2010-04-13
| | | | | | | | This gets rid of a local function (is_kernel_stack()) which tries to do the same thing, yet poorly in that it doesn't handle IRQ stacks properly. Signed-off-by: David S. Miller <davem@davemloft.net>
* sunxvr500: Ignore secondary output PCI devices.David S. Miller2010-04-04
| | | | | | | | | | | These just represent the secondary and further heads attached to the card, and they have different sets of PCI bar registers to map. So don't try to drive them in the main driver. Reported-by: Frans van Berckel <fberckel@xs4all.nl> Tested-by: Frans van Berckel <fberckel@xs4all.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Implement perf_arch_fetch_caller_regsDavid S. Miller2010-04-04
| | | | | | | | | | | | | | | | | | | | | | | We provide regs->tstate, regs->tpc, regs->tnpc and regs->u_regs[UREG_FP]. regs->tstate is necessary for: user_mode() (via perf_exclude_event()) perf_misc_flags() (via perf_prepare_sample()) regs->tpc is necessary for: perf_instruction_pointer() (via perf_prepare_sample()) and regs->u_regs[UREG_FP] is necessary for: perf_callchain() (via perf_prepare_sample()) The regs->tnpc value is provided just to be tidy. Signed-off-by: David S. Miller <davem@davemloft.net>
* sparc64: Update defconfig.David S. Miller2010-04-03
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of /home/davem/src/GIT/linux-2.6/David S. Miller2010-04-03
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| * Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2010-04-02
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/home/rmk/linux-2.6-arm: ARM: 5965/1: Fix soft lockup in at91 udc driver ARM: 6006/1: ARM: Use the correct NOP size in memmove for Thumb-2 kernel builds ARM: 6005/1: arm: kprobes: fix register corruption with jprobes ARM: 6003/1: removing compilation warning from pl061.h ARM: 6001/1: removing compilation warning comming from clkdev.h ARM: 6000/1: removing compilation warning comming from <asm/irq.h> ARM: 5999/1: Including device.h and resource.h header files in linux/amba/bus.h ARM: 5997/1: ARM: Correct the VFPv3 detection ARM: 5996/1: ARM: Change the mandatory barriers implementation (4/4) ARM: 5995/1: ARM: Add L2x0 outer_sync() support (3/4) ARM: 5994/1: ARM: Add outer_cache_fns.sync function pointer (2/4) ARM: 5993/1: ARM: Move the outer_cache definitions into a separate file (1/4)
| | * ARM: 5965/1: Fix soft lockup in at91 udc driverHarro Haan2010-03-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a potential soft lockup in the AT91 UDC driver by ensuring that the UDC clock is enabled inside the interrupt handler. If the UDC clock is not enabled then the UDC registers cannot be written to and the interrupt cannot be cleared or masked. Note that this patch (and other parts of the existing AT91 UDC driver) is potentially racy for preempt-rt kernels, but is okay for mainline. For more info see: http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20100203/09cdb3b4/attachment.el http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20100203/8443a1e4/attachment.el Signed-off-by: Ryan Mallon <ryan@bluewatersys.com> Acked-by: Harro Haan <hrhaan@gmail.com> Tested-by: Remy Bohmer <linux@bohmer.net> Acked-by: Andrew Victor <avictor.za@gmail.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * ARM: 6006/1: ARM: Use the correct NOP size in memmove for Thumb-2 kernel buildsCatalin Marinas2010-03-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When compiling the kernel to Thumb-2, using a 16-bit NOP in the memmove() implementation causes the preceding ADD PC instruction to branch incorrectly in the middle of a 32-bit LDR or STR instruction. The memmove() code is now similar to the memcpy() template. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * ARM: 6005/1: arm: kprobes: fix register corruption with jprobesMika Westerberg2010-03-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current implementation of jprobes allocates empty pt_regs from the stack which is then passed to kprobe_handler() and eventually to singlestep(). Now when instruction being simulated is STMFD (like in normal function prologues without CONFIG_FRAME_POINTER), stores using SP actually write over top of the fabricated pt_regs structure. This can be reproduced for example by using LKDTM module: # modprobe lkdtm # mount -t debugfs none /sys/kernel/debug # echo PANIC > /sys/kernel/debug/provoke-crash/INT_HW_IRQ_EN after this, it fails with corrupted registers (before the requested crash would occur): lkdtm: Crash point INT_HW_IRQ_EN of type PANIC hit, trigger in 9 rounds lkdtm: Crash point INT_HW_IRQ_EN of type PANIC hit, trigger in 8 rounds Internal error: Oops - undefined instruction: 0 [#1] last sysfs file: /sys/devices/platform/serial8250.0/sleep_timeout Modules linked in: lkdtm CPU: 0 Not tainted (2.6.34-rc2 #69) PC is at irq_desc+0x1638/0xeeb0 LR is at 0x25 pc : [<c050b428>] lr : [<00000025>] psr: c80a0013 sp : ce94bd60 ip : c050b3e8 fp : a0000013 r10: c0aa453c r9 : cf5d4000 r8 : ce9a1822 r7 : c050b424 r6 : 00000025 r5 : c039d8f8 r4 : c050b3e8 r3 : 00000001 r2 : cf4d0440 r1 : c039d8f8 r0 : 00000020 Flags: NZcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 10c5387d Table: 8e804019 DAC: 00000015 Process sh (pid: 496, stack limit = 0xce94a2e8) Stack: (0xce94bd60 to 0xce94c000) [...] Code: 000002cd 00000000 00000000 00000001 (dead4ead) ---[ end trace 2b46d5f2b682f370 ]--- Kernel panic - not syncing: Fatal exception in interrupt This patch allocates enough space (2 * sizeof(struct pt_regs)) from the stack to prevent such corruption. Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com> Acked-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * ARM: 6003/1: removing compilation warning from pl061.hviresh kumar2010-03-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | pl061.h is using u8 type. including <linux/types.h> in pl061.h to avoid warning. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * ARM: 6001/1: removing compilation warning comming from clkdev.hviresh kumar2010-03-29
| | | | | | | | | | | | | | | | | | | | | | | | clkdev.h is using struct device *. Due to this compilation warning is comming. Removing this warning. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * ARM: 6000/1: removing compilation warning comming from <asm/irq.h>viresh kumar2010-03-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | irq.h is using struct pt_regs *. Due to this compilation warning is comming. Removing this warning by adding declaration of struct pt_regs. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * ARM: 5999/1: Including device.h and resource.h header files in linux/amba/bus.hviresh kumar2010-03-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | linux/amba/bus.h have dependencies on linux/device.h and linux/resource.h, but it doesn't include them. We get compilation errors in our files which include bus.h but doesn't include device.h and resource.h. This patch includes device.h and resource.h in linux/amba/bus.h file. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Linux Walleij <linux.ml.walleij@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * ARM: 5997/1: ARM: Correct the VFPv3 detectionCatalin Marinas2010-03-28
| | | | | | | | | | | | | | | | | | | | | | | | A CPU has VFPv3 hardware if the FPSID[19:16] bits are 2 or more. Currently Linux was only checking for 3 or more. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * ARM: 5996/1: ARM: Change the mandatory barriers implementation (4/4)Catalin Marinas2010-03-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The mandatory barriers (mb, rmb, wmb) are used even on uniprocessor systems for things like ordering Normal Non-cacheable memory accesses with DMA transfer (via Device memory writes). The current implementation uses dmb() for mb() and friends but this is not sufficient. The DMB only ensures the relative ordering of the observability of accesses by other processors or devices acting as masters. In case of DMA transfers started by writes to device memory, the relative ordering is not ensured because accesses to slave ports of a device are not considered observable by the DMB definition. A DSB is required for the data to reach the main memory (even if mapped as Normal Non-cacheable) before the device receives the notification to begin the transfer. Furthermore, some L2 cache controllers (like L2x0 or PL310) buffer stores to Normal Non-cacheable memory and this would need to be drained with the outer_sync() function call. The patch also allows platforms to define their own mandatory barriers implementation by selecting CONFIG_ARCH_HAS_BARRIERS and providing a mach/barriers.h file. Note that the SMP barriers are unchanged (being DMBs as before) since they are only guaranteed to work with Normal Cacheable memory. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * ARM: 5995/1: ARM: Add L2x0 outer_sync() support (3/4)Catalin Marinas2010-03-25
| | | | | | | | | | | | | | | | | | | | | | | | The L2x0 cache controllers need to explicitly drain their write buffer even for Normal Noncacheable memory accesses. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * ARM: 5994/1: ARM: Add outer_cache_fns.sync function pointer (2/4)Catalin Marinas2010-03-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces the outer_cache_fns.sync function pointer together with the OUTER_CACHE_SYNC config option that can be used to drain the write buffer of the outer cache. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * ARM: 5993/1: ARM: Move the outer_cache definitions into a separate file (1/4)Catalin Marinas2010-03-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | To avoid #include collisions with subsequent patches in the series, this patch moves the outer_cache definitions to a separate asm/outercache.h file. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | Merge branch 'merge' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds2010-04-02
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | * 'merge' of git://git.secretlab.ca/git/linux-2.6: powerpc/5200: in lpbfifo, flag DMA irqs as enabled after requesting them powerpc/fsl: add device tree binding for QE firmware of/flattree: Fix unhandled OF_DT_NOP tag when unflattening the device tree
| | * | powerpc/5200: in lpbfifo, flag DMA irqs as enabled after requesting themRoman Fietze2010-03-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch avoids unbalanced enable/disable messages for the DMA interrupts when running the 5200 platform SCLPC/BestComm driver in DMA mode. Signed-off-by: Roman Fietze <roman.fietze@telemotive.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | * | powerpc/fsl: add device tree binding for QE firmwareTimur Tabi2010-03-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Define a binding for embedding a QE firmware blob into the device tree. Also define a new property for the QE node that links to a firmware node. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | * | of/flattree: Fix unhandled OF_DT_NOP tag when unflattening the device treeJason Gunthorpe2010-03-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | NOPs within the property section are skipped, but NOPs between OF_DT_END_NODE and OF_DT_BEGIN_NODE were not. My firmware NOPs out entire nodes depending on various environment parameters. of_scan_flat_dt already handles NOP more generally. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | Merge branch 'reiserfs/kill-bkl' of ↵Linus Torvalds2010-04-02
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing * 'reiserfs/kill-bkl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing: reiserfs: Fix locking BUG during mount failure
| | * | | reiserfs: Fix locking BUG during mount failureJeff Mahoney2010-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 8ebc423238341b52912c7295b045a32477b33f09 (reiserfs: kill-the-BKL) introduced a bug in the mount failure case. The error label releases the lock before calling journal_release_error, but it requires that the lock be held. do_journal_release unlocks and retakes it. When it releases it without it held, we trigger a BUG(). The error_alloc label skips the unlock since the lock isn't held yet but none of the other conditions that are clean up exist yet either. This patch returns immediately after the kzalloc failure and moves the reiserfs_write_unlock after the journal_release_error call. This was reported in https://bugzilla.novell.com/show_bug.cgi?id=591807 Reported-by: Thomas Siedentopf <thomas.siedentopf@novell.com> Signed-off-by: Jeff Mahoney <jeffm@suse.com> Cc: Thomas Siedentopf <thomas.siedentopf@novell.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: 2.6.33.x <stable@kernel.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | | | PCI quirk: RS780/RS880: disable MSI behind the PCI bridgeClemens Ladisch2010-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The missing initialization of the nb_cntl.strap_msi_enable does not seem to be the only problem that prevents MSI, so that quirk is not sufficient to enable MSI on all machines. To be safe, disable MSI unconditionally for the internal graphics and HDMI audio on these chipsets. [rjw: Added the PCI_VENDOR_ID_AI quirk.] Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | Merge branch 'kgdb-fixes' of ↵Linus Torvalds2010-04-02
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb * 'kgdb-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb: kgdb: Turn off tracing while in the debugger kgdb: use atomic_inc and atomic_dec instead of atomic_set kgdb: eliminate kgdb_wait(), all cpus enter the same way kgdbts,sh: Add in breakpoint pc offset for superh kgdb: have ebin2mem call probe_kernel_write once
| | * | | | kgdb: Turn off tracing while in the debuggerJason Wessel2010-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kernel debugger should turn off kernel tracing any time the debugger is active and restore it on resume. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
| | * | | | kgdb: use atomic_inc and atomic_dec instead of atomic_setJason Wessel2010-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Memory barriers should be used for the kgdb cpu synchronization. The atomic_set() does not imply a memory barrier. Reported-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
| | * | | | kgdb: eliminate kgdb_wait(), all cpus enter the same wayJason Wessel2010-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a kgdb architectural change to have all the cpus (master or slave) enter the same function. A cpu that hits an exception (wants to be the master cpu) will call kgdb_handle_exception() from the trap handler and then invoke a kgdb_roundup_cpu() to synchronize the other cpus and bring them into the kgdb_handle_exception() as well. A slave cpu will enter kgdb_handle_exception() from the kgdb_nmicallback() and set the exception state to note that the processor is a slave. Previously the salve cpu would have called kgdb_wait(). This change allows the debug core to change cpus without resuming the system in order to inspect arch specific cpu information. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
| | * | | | kgdbts,sh: Add in breakpoint pc offset for superhJason Wessel2010-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kgdb test suite mimics the behavior of gdb. For the sh architecture the pc must be decremented by 2 for software breakpoint. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Acked-by: Paul Mundt <lethal@linux-sh.org>
| | * | | | kgdb: have ebin2mem call probe_kernel_write onceJason Wessel2010-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather than call probe_kernel_write() one byte at a time, process the whole buffer locally and pass the entire result in one go. This way, architectures that need to do special handling based on the length can do so, or we only end up calling memcpy() once. [sonic.zhang@analog.com: Reported original problem and preliminary patch] Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| * | | | | Merge branch 'pm-fixes' of ↵Linus Torvalds2010-04-02
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6 * 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: Freezer: Fix buggy resume test for tasks frozen with cgroup freezer Freezer: Only show the state of tasks refusing to freeze
| | * | | | | Freezer: Fix buggy resume test for tasks frozen with cgroup freezerMatt Helsley2010-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the cgroup freezer is used to freeze tasks we do not want to thaw those tasks during resume. Currently we test the cgroup freezer state of the resuming tasks to see if the cgroup is FROZEN. If so then we don't thaw the task. However, the FREEZING state also indicates that the task should remain frozen. This also avoids a problem pointed out by Oren Ladaan: the freezer state transition from FREEZING to FROZEN is updated lazily when userspace reads or writes the freezer.state file in the cgroup filesystem. This means that resume will thaw tasks in cgroups which should be in the FROZEN state if there is no read/write of the freezer.state file to trigger this transition before suspend. NOTE: Another "simple" solution would be to always update the cgroup freezer state during resume. However it's a bad choice for several reasons: Updating the cgroup freezer state is somewhat expensive because it requires walking all the tasks in the cgroup and checking if they are each frozen. Worse, this could easily make resume run in N^2 time where N is the number of tasks in the cgroup. Finally, updating the freezer state from this code path requires trickier locking because of the way locks must be ordered. Instead of updating the freezer state we rely on the fact that lazy updates only manage the transition from FREEZING to FROZEN. We know that a cgroup with the FREEZING state may actually be FROZEN so test for that state too. This makes sense in the resume path even for partially-frozen cgroups -- those that really are FREEZING but not FROZEN. Reported-by: Oren Ladaan <orenl@cs.columbia.edu> Signed-off-by: Matt Helsley <matthltc@us.ibm.com> Cc: stable@kernel.org Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| | * | | | | Freezer: Only show the state of tasks refusing to freezeXiaotian Feng2010-03-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | show_state will dump all tasks state, so if freezer failed to freeze any task, kernel will dump all tasks state and flood the dmesg log. This patch makes freezer only show state of tasks refusing to freeze. Signed-off-by: Xiaotian Feng <dfeng@redhat.com> Acked-by: Pavel Machek <pavel@ucw.cz> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| * | | | | | tty: release_one_tty() forgets to put pidsOleg Nesterov2010-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | release_one_tty(tty) can be called when tty still has a reference to pgrp/session. In this case we leak the pid. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reported-by: Catalin Marinas <catalin.marinas@arm.com> Reported-and-tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | | | Merge branch 'for-linus' of ↵Linus Torvalds2010-04-02
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: Add NOGET quirk for Quanta Pixart touchscreen HID: fix oops in gyration_event()
| | * | | | | | HID: Add NOGET quirk for Quanta Pixart touchscreenAnisse Astier2010-03-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the NOGET quirk for the Quanta optical touchscreen present on MSI AE2220, Otherwise, the hid-quanta driver timeouts at load time: drivers/hid/usbhid/hid-core.c: usb_submit_urb(ctrl) failed quanta-touch 0003:0408:3001.0003: timeout initializing reports input: PixArt Imaging Inc. Optical Touch Screen as /class/input/input7 quanta-touch 0003:0408:3001.0003: input: USB HID v1.10 Device [PixArt Imaging Inc. Optical Touch Screen] on usb-0000:00:06.0-2/input0 Signed-off-by: Anisse Astier <anisse@astier.eu> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| | * | | | | | HID: fix oops in gyration_event()Jiri Kosina2010-03-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix oops caused by dereferencing field->hidinput in cases where the device hasn't been claimed by hid-input. Reported-by: Andreas Demmer <mail@andreas-demmer.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * | | | | | | Merge branch 'sh/for-2.6.34' of ↵Linus Torvalds2010-04-02
| |\ \ \ \ \ \ \ | | |_|_|/ / / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 * 'sh/for-2.6.34' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: sh: Fix up the SH-3 build for recent TLB changes. sh: export return_address() symbol. sh: Enable the mmu in start_secondary() sh: Fix FDPIC binary loader arch/sh/kernel: Use set_cpus_allowed_ptr sh: Update ecovec_defconfig USB gadget r8a66597-udc.c: duplicated include sh: update the TLB replacement counter for entry wiring.
| | * | | | | | sh: Fix up the SH-3 build for recent TLB changes.Paul Mundt2010-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While the MMUCR.URB and ITLB/UTLB differentiation works fine for all SH-4 and later TLBs, these features are absent on SH-3. This splits out local_flush_tlb_all() in to SH-4 and PTEAEX copies while restoring the old SH-3 one, subsequently fixing up the build. This will probably want some further reordering and tidying in the future, but that's out of scope at present. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | | | | | sh: export return_address() symbol.Paul Mundt2010-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is needed with some of the tracing code built as modules, so provide the export. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 19:40:52 -0500