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2012-11-30s390/pci: PCI hotplug support via SCLPJan Glauber3-0/+22
Add SCLP PCI configure/deconfigure and implement a PCI hotplug controller (s390_pci_hpc). The hotplug controller creates a slot for every PCI function in stand-by or configured state. The PCI functions are named after the PCI function ID (fid). By writing to the power attribute in /sys/bus/pci/slots/<fid>/power the PCI function is moved to stand-by or configured state. If moved to the configured state the device is automatically scanned by the s390 PCI layer. Signed-off-by: Jan Glauber <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-30s390/pci: CHSC PCI support for error and availability eventsJan Glauber3-1/+99
Add CHSC store-event-information support for PCI (notfication type 2) and report error and availability events to the PCI architecture layer. Signed-off-by: Jan Glauber <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-30s390/pci: DMA supportJan Glauber8-11/+848
Add DMA IOMMU support using 4K page table entries. Implement dma_map_ops. Signed-off-by: Jan Glauber <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-30s390/pci: PCI adapter interrupts for MSI/MSI-XJan Glauber9-2/+672
Support PCI adapter interrupts using the Single-IRQ-mode. Single-IRQ-mode disables an adapter IRQ automatically after delivering it until the SIC instruction enables it again. This is used to reduce the number of IRQs for streaming workloads. Up to 64 MSI handlers can be registered per PCI function. A hash table is used to map interrupt numbers to MSI descriptors. The interrupt vector is scanned using the flogr instruction. Only MSI/MSI-X interrupts are supported, no legacy INTs. Signed-off-by: Jan Glauber <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-30s390/bitops: find leftmost bit instruction supportJan Glauber1-0/+81
The flogr instruction scans a bitmap starting from the leftmost bit. Implement support for these bitops. This could be useful to scan bitmaps like an interrupt vector set by the hardware starting at the leftmost bit. Signed-off-by: Jan Glauber <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-30s390/pci: CLP interfaceJan Glauber6-1/+563
CLP instructions are used to query the firmware about detected PCI functions, the attributes of those functions and to enable or disable a PCI function. The CLP interface is the equivalent to a PCI bus scan. Signed-off-by: Jan Glauber <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-30s390/pci: base supportJan Glauber8-8/+1181
Add PCI support for s390, (only 64 bit mode is supported by hardware): - PCI facility tests - PCI instructions: pcilg, pcistg, pcistb, stpcifc, mpcifc, rpcit - map readb/w/l/q and writeb/w/l/q to pcilg and pcistg instructions - pci_iomap implementation - memcpy_fromio/toio - pci_root_ops using special pcilg/pcistg - device, bus and domain allocation Signed-off-by: Jan Glauber <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-29unify default ptrace_signal_deliverAl Viro1-2/+0
Signed-off-by: Al Viro <[email protected]>
2012-11-28flagday: don't pass regs to copy_thread()Al Viro1-2/+1
Signed-off-by: Al Viro <[email protected]>
2012-11-28take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.hAl Viro1-4/+0
now it can be done... Signed-off-by: Al Viro <[email protected]>
2012-11-28s390: switch to generic fork/vfork/cloneAl Viro3-42/+14
Signed-off-by: Al Viro <[email protected]>
2012-11-28Merge branches 'no-rebases', 'arch-avr32', 'arch-blackfin', 'arch-cris', ↵Al Viro4-49/+11
'arch-h8300', 'arch-m32r', 'arch-mn10300', 'arch-score', 'arch-sh' and 'arch-powerpc' into for-next
2012-11-27KVM: x86: add kvm_arch_vcpu_postcreate callback, move TSC initializationMarcelo Tosatti1-0/+5
TSC initialization will soon make use of online_vcpus. Signed-off-by: Marcelo Tosatti <[email protected]>
2012-11-23s390/ccwgroup: allow drivers to call set_{on,off}lineSebastian Ott1-0/+3
Allow drivers to enable/disable ccwgroup devices. Acked-by: Peter Oberparleiter <[email protected]> Signed-off-by: Sebastian Ott <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-23s390/kvm: Fix address space mixupChristian Borntraeger1-5/+20
I was chasing down a bug of random validity intercepts on s390. (guest prefix page not mapped in the host virtual aspace). Turns out that the problem was a wrong address space control element. The cause was quite complex: During paging activity a DAT protection during SIE caused a program interrupt. Normally, the sie retry loop tries to catch all interrupts during and shortly before sie to rerun the setup. The problem is now that protection causes a suppressing program interrupt, causing the PSW to point to the instruction AFTER SIE in case of DAT protection. This confused the logic of the retry loop to not trigger, instead we jumped directly back to SIE after return from the program interrupt. (the protection fault handler itself did a rewind of the psw). This usually works quite well, but: If now the protection fault handler has to wait, another program might be scheduled in. Later on the sie process will be schedules in again. In that case the content of CR1 (primary address space) will be wrong because switch_to will put the user space ASCE into CR1 and not the guest ASCE. In addition the program parameter is also wrong for every protection fault of a guest, since we dont issue the SPP instruction. So lets also check for PSW == instruction after SIE in the program check handler. Instead of expensively checking all program interruption codes that might be suppressing we assume that a program interrupt pointing after SIE was always a program interrupt in SIE. (Otherwise we have a kernel bug anyway). We also have to compensate the rewinding, since the C-level handlers will do that. Therefore we need to add a nop with the same length as SIE before the sie_loop. Signed-off-by: Christian Borntraeger <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]> CC: [email protected] CC: Heiko Carstens <[email protected]>
2012-11-23s390/ptrace: race of single stepping vs signal deliveryMartin Schwidefsky4-14/+21
The current single step code is racy in regard to concurrent delivery of signals. If a signal is delivered after a PER program check occurred but before the TIF_PER_TRAP bit has been checked in entry[64].S the code clears TIF_PER_TRAP and then calls do_signal. This is wrong, if the instruction completed (or has been suppressed) a SIGTRAP should be delivered to the debugger in any case. Only if the instruction has been nullified the SIGTRAP may not be send. The new logic always sets TIF_PER_TRAP if the program check indicates PER tracing but removes it again for all program checks that are nullifying. The effect is that for each change in the PSW address we now get a single SIGTRAP. Reported-by: Andreas Arnez <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-23s390/disassembler: add new instructionsHeiko Carstens1-193/+370
Signed-off-by: Heiko Carstens <[email protected]>
2012-11-23s390: add zEC12 code generation supportHeiko Carstens4-30/+59
Allow to generate code that only runs on zEC12 machines. Also add a check which prevents the kernel to run on machines which do not have any of the following new facilities installed: - (48) decimal-floating-point zoned-conversion - (49) execution-hint - (49) load-and-trap - (49) miscellaneous-instruction-extensions - (49) processor-assist - (50) constrained transactional-execution - (73) transactional-execution 48, 49, 50 and 73 are the bit numbers of the facility indications for each of the required facilities. Note that we assume that user-space gets compiled with the same compiler options, therefore we also test for a dfp facility even if the kernel doesn't make use of it. Signed-off-by: Heiko Carstens <[email protected]>
2012-11-23s390/topology: cleanup topology codeHeiko Carstens2-75/+72
Mainly merge all different per-cpu arrays into a single array which holds all topology information per logical cpu. Also fix the broken core vs socket variable naming and simplify the locking a bit. When running in environments without topology information also invent book, socket and core ids, so that not all ids are zero. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-23s390/mm: move kernel_page_present/kernel_map_pages to page_attr.cHeiko Carstens3-44/+43
Keep related functions together and move to appropriate file. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-23s390/memory hotplug: use pfmf instruction to initialize storage keysHeiko Carstens4-42/+45
Move and rename init_storage_keys() to pageattr.c, so it can also be used from the sclp memory hotplug code in order to initialize storage keys. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-23s390/mm: keep fault_init() private to fault.cHeiko Carstens3-6/+8
Just convert fault_init() to an early initcall. That's still early enough since it only needs be called before user space processes get executed. No reason to externalize it. Also add the function to the init section and move the store_indication variable to the read_mostly section. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-23s390: use ccw_device_get_schidSebastian Ott1-3/+0
Let the dasd driver and qdio use ccw_device_get_schid and get rid of other similar functions. Signed-off-by: Sebastian Ott <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-23s390: Add a mechanism to get the subchannel id.Cornelia Huck1-0/+5
This will be needed by the new virtio-ccw transport. Signed-off-by: Cornelia Huck <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-23s390/crypto: Don't panic after crypto instruction failuresJan Glauber4-21/+39
Remove the BUG_ON's that check for failure or incomplete results of the s390 hardware crypto instructions. Rather report the errors as -EIO to the crypto layer. Signed-off-by: Jan Glauber <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-23s390/traps: preinitialize program check tableHeiko Carstens5-49/+182
Preinitialize the program check table, so we can put it into the read-only data section. Also use only four byte entries for the table, since each program check handler resides within the first 2GB. Therefore this reduces the size of the table by 50% on 64 bit builds. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-23s390/mm,vmemmap: use 1MB frames for vmemmapHeiko Carstens1-1/+25
Use 1MB frames for vmemmap if EDAT1 is available in order to reduce TLB pressure Always use a 1MB frame even if its only partially needed for struct pages. Otherwise we would end up with a mix of large frame and page mappings, because vmemmap_populate gets called for each section (256MB -> 3.5MB memmap) separately. Worst case is that we would waste 512KB. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-23s390/mm,vmem: use 2GB frames for identity mappingHeiko Carstens4-6/+33
Use 2GB frames for indentity mapping if EDAT2 is available to reduce TLB pressure. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-20vtime: Warn if irqs aren't disabled on system time accounting APIsFrederic Weisbecker1-0/+2
System time accounting APIs such as vtime_account_system() and vtime_account_idle() need to be irqsafe. Current callers include irq entry, exit and kvm, all of which have been checked against that requirement. Now it's better to grow that with an automatic check in case we have further callers or we missed something. Suggested-by: Steven Rostedt <[email protected]> Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Paul Gortmaker <[email protected]> Cc: Tony Luck <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]>
2012-11-19vtime: Consolidate a bit the ctx switch codeFrederic Weisbecker1-0/+1
On ia64 and powerpc, vtime context switch only consists in flushing system and user pending time, plus a few arch housekeeping. Consolidate that into a generic implementation. s390 is a special case because pending user and system time accounting there is hard to dissociate. So it's keeping its own implementation. Signed-off-by: Frederic Weisbecker <[email protected]> Reviewed-by: Steven Rostedt <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Paul Gortmaker <[email protected]> Cc: Tony Luck <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]>
2012-11-19vtime: Explicitly account pending user time on process tickFrederic Weisbecker1-1/+6
All vtime implementations just flush the user time on process tick. Consolidate that in generic code by calling a user time accounting helper. This avoids an indirect call in ia64 and prepare to also consolidate vtime context switch code. Signed-off-by: Frederic Weisbecker <[email protected]> Reviewed-by: Steven Rostedt <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Paul Gortmaker <[email protected]> Cc: Tony Luck <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]>
2012-11-19vtime: Remove the underscore prefix invasionFrederic Weisbecker1-2/+2
Prepending irq-unsafe vtime APIs with underscores was actually a bad idea as the result is a big mess in the API namespace that is even waiting to be further extended. Also these helpers are always called from irq safe callers except kvm. Just provide a vtime_account_system_irqsafe() for this specific case so that we can remove the underscore prefix on other vtime functions. Signed-off-by: Frederic Weisbecker <[email protected]> Reviewed-by: Steven Rostedt <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Paul Gortmaker <[email protected]> Cc: Tony Luck <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]>
2012-11-17Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller12-28/+70
Minor line offset auto-merges. Signed-off-by: David S. Miller <[email protected]>
2012-11-17irq_work: Remove CONFIG_HAVE_IRQ_WORKFrederic Weisbecker1-1/+0
irq work can run on any arch even without IPI support because of the hook on update_process_times(). So lets remove HAVE_IRQ_WORK because it doesn't reflect any backend requirement. Signed-off-by: Frederic Weisbecker <[email protected]> Acked-by: Steven Rostedt <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Paul Gortmaker <[email protected]>
2012-11-16Merge branch 'arch-microblaze' into no-rebasesAl Viro5-16/+33
2012-11-16Merge branch 'arch-frv' into no-rebasesAl Viro9-20/+33
2012-11-13tracing,x86: Add a TSC trace_clockDavid Sharp1-0/+1
In order to promote interoperability between userspace tracers and ftrace, add a trace_clock that reports raw TSC values which will then be recorded in the ring buffer. Userspace tracers that also record TSCs are then on exactly the same time base as the kernel and events can be unambiguously interlaced. Tested: Enabled a tracepoint and the "tsc" trace_clock and saw very large timestamp values. v2: Move arch-specific bits out of generic code. v3: Rename "x86-tsc", cleanups v7: Generic arch bits in Kbuild. Google-Bug-Id: 6980623 Link: http://lkml.kernel.org/r/[email protected] Acked-by: Ingo Molnar <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Signed-off-by: David Sharp <[email protected]> Signed-off-by: Steven Rostedt <[email protected]>
2012-11-13s390/mm: have 16 byte aligned struct pagesHeiko Carstens1-0/+1
Select HAVE_ALIGNED_STRUCT_PAGE on s390, so that the slub allocator can make use of compare and swap double for lockless updates. This increases the size of struct page to 64 bytes (instead of 56 bytes), however the performance gain justifies the increased size: - now excactly four struct pages fit into a single cache line; the case that accessing a struct page causes two cache line loads does not exist anymore. - calculating the offset of a struct page within the memmap array is only a simple shift instead of a more expensive multiplication. A "hackbench 200 process 200" run on a 32 cpu system did show an 8% runtime improvement. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-13s390/gup: fix access_ok() usage in __get_user_pages_fast()Heiko Carstens1-2/+1
access_ok() returns always "true" on s390. Therefore all access_ok() invocations are rather pointless. However when walking page tables we need to make sure that everything is within bounds of the ASCE limit of the task's address space. So remove the access_ok() call and add the same check we have in get_user_pages_fast(). Reviewed-by: Gerald Schaefer <[email protected]> Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-13s390/gup: add missing TASK_SIZE check to get_user_pages_fast()Heiko Carstens1-1/+1
When walking page tables we need to make sure that everything is within bounds of the ASCE limit of the task's address space. Otherwise we might calculate e.g. a pud pointer which is not within a pud and dereference it. So check against TASK_SIZE (which is the ASCE limit) before walking page tables. Reviewed-by: Gerald Schaefer <[email protected]> Cc: [email protected] Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-12s390/topology: fix core id vs physical package id mix-upHeiko Carstens2-2/+7
The current topology code confuses core id vs physical package id. In other words /sys/devices/system/cpu/cpuX/topology/core_id displays the physical_package_id (aka socket id) instead of the core id. The physical_package_id sysfs attribute always displays "-1" instead of the socket id. Fix this mix-up with a small patch which defines and initializes topology_physical_package_id correctly and fixes the broken core id handling. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-12s390/signal: set correct address space controlMartin Schwidefsky4-7/+27
If user space is running in primary mode it can switch to secondary or access register mode, this is used e.g. in the clock_gettime code of the vdso. If a signal is delivered to the user space process while it has been running in access register mode the signal handler is executed in access register mode as well which will result in a crash most of the time. Set the address space control bits in the PSW to the default for the execution of the signal handler and make sure that the previous address space control is restored on signal return. Take care that user space can not switch to the kernel address space by modifying the registers in the signal frame. Cc: [email protected] Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-10Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller10-22/+33
Conflicts: drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c Minor conflict between the BCM_CNIC define removal in net-next and a bug fix added to net. Based upon a conflict resolution patch posted by Stephen Rothwell. Signed-off-by: David S. Miller <[email protected]>
2012-11-06s390/sclp: fix addressing mode clobberHeiko Carstens1-1/+7
The early mini sclp driver may be called in zArch mode either in 31 or 64 bit addressing mode. If called in 31 bit addressing mode the new external interrupt psw however would switch to 64 bit addressing mode. This would cause an addressing exception within the interrupt handler, since the code didn't expect the zArch/31 bit addressing mode combination. Fix this by setting the new psw addressing mode bits so they fit the current addressing mode. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-06s390: Move css limits from drivers/s390/cio/ to include/asm/.Cornelia Huck1-0/+2
There's no need to keep __MAX_SUBCHANNEL and __MAX_SSID private to the common I/O layer when __MAX_CSSID is usable by everybody. Signed-off-by: Cornelia Huck <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2012-11-01sk-filter: Add ability to get socket filter program (v2)Pavel Emelyanov1-0/+1
The SO_ATTACH_FILTER option is set only. I propose to add the get ability by using SO_ATTACH_FILTER in getsockopt. To be less irritating to eyes the SO_GET_FILTER alias to it is declared. This ability is required by checkpoint-restore project to be able to save full state of a socket. There are two issues with getting filter back. First, kernel modifies the sock_filter->code on filter load, thus in order to return the filter element back to user we have to decode it into user-visible constants. Fortunately the modification in question is interconvertible. Second, the BPF_S_ALU_DIV_K code modifies the command argument k to speed up the run-time division by doing kernel_k = reciprocal(user_k). Bad news is that different user_k may result in same kernel_k, so we can't get the original user_k back. Good news is that we don't have to do it. What we need to is calculate a user2_k so, that reciprocal(user2_k) == reciprocal(user_k) == kernel_k i.e. if it's re-loaded back the compiled again value will be exactly the same as it was. That said, the user2_k can be calculated like this user2_k = reciprocal(kernel_k) with an exception, that if kernel_k == 0, then user2_k == 1. The optlen argument is treated like this -- when zero, kernel returns the amount of sock_fprog elements in filter, otherwise it should be large enough for the sock_fprog array. changes since v1: * Declared SO_GET_FILTER in all arch headers * Added decode of vlan-tag codes Signed-off-by: Pavel Emelyanov <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-10-29Merge remote-tracking branch 'master' into queueMarcelo Tosatti97-1553/+2266
Merge reason: development work has dependency on kvm patches merged upstream. Conflicts: arch/powerpc/include/asm/Kbuild arch/powerpc/include/asm/kvm_para.h Signed-off-by: Marcelo Tosatti <[email protected]>
2012-10-29kvm: Directly account vtime to system on guest switchFrederic Weisbecker1-4/+0
Switching to or from guest context is done on ioctl context. So by the time we call kvm_guest_enter() or kvm_guest_exit() we know we are not running the idle task. As a result, we can directly account the cputime using vtime_account_system(). There are two good reasons to do this: * We avoid some useless checks on guest switch. It optimizes a bit this fast path. * In the case of CONFIG_IRQ_TIME_ACCOUNTING, calling vtime_account() checks for irq time to account. This is pointless since we know we are not in an irq on guest switch. This is wasting cpu cycles for no good reason. vtime_account_system() OTOH is a no-op in this config option. * We can remove the irq disable/enable around kvm guest switch in s390. A further optimization may consist in introducing a vtime_account_guest() that directly calls account_guest_time(). Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Tony Luck <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Avi Kivity <[email protected]> Cc: Marcelo Tosatti <[email protected]> Cc: Joerg Roedel <[email protected]> Cc: Alexander Graf <[email protected]> Cc: Xiantao Zhang <[email protected]> Cc: Christian Borntraeger <[email protected]> Cc: Cornelia Huck <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Paul Gortmaker <[email protected]>
2012-10-29vtime: Make vtime_account_system() irqsafeFrederic Weisbecker1-0/+4
vtime_account_system() currently has only one caller with vtime_account() which is irq safe. Now we are going to call it from other places like kvm where irqs are not always disabled by the time we account the cputime. So let's make it irqsafe. The arch implementation part is now prefixed with "__". vtime_account_idle() arch implementation is prefixed accordingly to stay consistent. Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Paul Gortmaker <[email protected]> Cc: Tony Luck <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]>
2012-10-29s390: switch to saner kernel_execve() semanticsAl Viro4-49/+11
Acked-by: Martin Schwidefsky <[email protected]> Signed-off-by: Al Viro <[email protected]>
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