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2012-02-21sys_poll: fix incorrect type for 'timeout' parameterLinus Torvalds
The 'poll()' system call timeout parameter is supposed to be 'int', not 'long'. Now, the reason this matters is that right now 32-bit compat mode is broken on at least x86-64, because the 32-bit code just calls 'sys_poll()' directly on x86-64, and the 32-bit argument will have been zero-extended, turning a signed 'int' into a large unsigned 'long' value. We could just introduce a 'compat_sys_poll()' function for this, and that may eventually be what we have to do, but since the actual standard poll() semantics is *supposed* to be 'int', and since at least on x86-64 glibc sign-extends the argument before invocing the system call (so nobody can actually use a 64-bit timeout value in user space _anyway_, even in 64-bit binaries), the simpler solution would seem to be to just fix the definition of the system call to match what it should have been from the very start. If it turns out that somebody somehow circumvents the user-level libc 64-bit sign extension and actually uses a large unsigned 64-bit timeout despite that not being how poll() is supposed to work, we will need to do the compat_sys_poll() approach. Reported-by: Thomas Meyer <thomas@m3y3r.de> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-02-17[S390] correct ktime to tod clock comparator conversionMartin Schwidefsky
The conversion of the ktime to a value suitable for the clock comparator does not take changes to wall_to_monotonic into account. In fact the conversion just needs the boot clock (sched_clock_base_cc) and the total_sleep_time. This is applicable to 3.2+ kernels. CC: stable@vger.kernel.org Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-02-17[S390] incorrect PageTables counter for kvm page tablesMartin Schwidefsky
The page_table_free_pgste function is used for kvm processes to free page tables that have the pgste extension. It calls pgtable_page_ctor instead of pgtable_page_dtor which increases NR_PAGETABLE instead of decreasing it. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-02-17[S390] idle: avoid RCU usage in extended quiescent stateHeiko Carstens
Avoid calling wake_up() from our NMI "bottom halve" from RCU extended quiescent state in idle. wake_up() has RCU read-side critical sections but this will be completely ignored by RCU if the cpu is in extended quiescent state. Which means that whatever object is being accessed from within the read-side critical section can be freed concurrently from a different cpu. So make sure we leave extended quiescent state before calling wake_up(). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-01-30Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: [S390] dasd: revalidate server for new pathgroup [S390] dasd: revert LCU optimization [S390] cleanup entry point definition
2012-01-23kdump: define KEXEC_NOTE_BYTES arch specific for s390xMichael Holzheu
kdump only allocates memory for the prstatus ELF note. For s390x, besides of prstatus multiple ELF notes for various different register types are stored. Therefore the currently allocated memory is not sufficient. With this patch the KEXEC_NOTE_BYTES macro can be defined by architecture code and for s390x it is set to the correct size now. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-01-18[S390] cleanup entry point definitionChristian Borntraeger
The vmlinux file for s390 contains a currently unused entry point, which is specified in two different locations: the linker script and the makefile. As it happens both definitions are different and the linker file is broken (_start does not exist) and the makefile specifies an entry point which makes no sense (the SALIPL loader entry point). So lets get rid of one definition (the makefile) and use the entry point of all other ipl methods (0x10000 -> startup) to be consistent. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-01-17Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit: (29 commits) audit: no leading space in audit_log_d_path prefix audit: treat s_id as an untrusted string audit: fix signedness bug in audit_log_execve_info() audit: comparison on interprocess fields audit: implement all object interfield comparisons audit: allow interfield comparison between gid and ogid audit: complex interfield comparison helper audit: allow interfield comparison in audit rules Kernel: Audit Support For The ARM Platform audit: do not call audit_getname on error audit: only allow tasks to set their loginuid if it is -1 audit: remove task argument to audit_set_loginuid audit: allow audit matching on inode gid audit: allow matching on obj_uid audit: remove audit_finish_fork as it can't be called audit: reject entry,always rules audit: inline audit_free to simplify the look of generic code audit: drop audit_set_macxattr as it doesn't do anything audit: inline checks for not needing to collect aux records audit: drop some potentially inadvisable likely notations ... Use evil merge to fix up grammar mistakes in Kconfig file. Bad speling and horrible grammar (and copious swearing) is to be expected, but let's keep it to commit messages and comments, rather than expose it to users in config help texts or printouts.
2012-01-17audit: inline audit_syscall_entry to reduce burden on archsEric Paris
Every arch calls: if (unlikely(current->audit_context)) audit_syscall_entry() which requires knowledge about audit (the existance of audit_context) in the arch code. Just do it all in static inline in audit.h so that arch's can remain blissfully ignorant. Signed-off-by: Eric Paris <eparis@redhat.com>
2012-01-17Audit: push audit success and retcode into arch ptrace.hEric Paris
The audit system previously expected arches calling to audit_syscall_exit to supply as arguments if the syscall was a success and what the return code was. Audit also provides a helper AUDITSC_RESULT which was supposed to simplify things by converting from negative retcodes to an audit internal magic value stating success or failure. This helper was wrong and could indicate that a valid pointer returned to userspace was a failed syscall. The fix is to fix the layering foolishness. We now pass audit_syscall_exit a struct pt_reg and it in turns calls back into arch code to collect the return value and to determine if the syscall was a success or failure. We also define a generic is_syscall_success() macro which determines success/failure based on if the value is < -MAX_ERRNO. This works for arches like x86 which do not use a separate mechanism to indicate syscall failure. We make both the is_syscall_success() and regs_return_value() static inlines instead of macros. The reason is because the audit function must take a void* for the regs. (uml calls theirs struct uml_pt_regs instead of just struct pt_regs so audit_syscall_exit can't take a struct pt_regs). Since the audit function takes a void* we need to use static inlines to cast it back to the arch correct structure to dereference it. The other major change is that on some arches, like ia64, MIPS and ppc, we change regs_return_value() to give us the negative value on syscall failure. THE only other user of this macro, kretprobe_example.c, won't notice and it makes the value signed consistently for the audit functions across all archs. In arch/sh/kernel/ptrace_64.c I see that we were using regs[9] in the old audit code as the return value. But the ptrace_64.h code defined the macro regs_return_value() as regs[3]. I have no idea which one is correct, but this patch now uses the regs_return_value() function, so it now uses regs[3]. For powerpc we previously used regs->result but now use the regs_return_value() function which uses regs->gprs[3]. regs->gprs[3] is always positive so the regs_return_value(), much like ia64 makes it negative before calling the audit code when appropriate. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: H. Peter Anvin <hpa@zytor.com> [for x86 portion] Acked-by: Tony Luck <tony.luck@intel.com> [for ia64] Acked-by: Richard Weinberger <richard@nod.at> [for uml] Acked-by: David S. Miller <davem@davemloft.net> [for sparc] Acked-by: Ralf Baechle <ralf@linux-mips.org> [for mips] Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [for ppc]
2012-01-14Merge branch 'for-next' of git://git.infradead.org/users/dhowells/linux-headersLinus Torvalds
* 'for-next' of git://git.infradead.org/users/dhowells/linux-headers: UAPI: Split trivial #if defined(__KERNEL__) && X conditionals UAPI: Don't have a #elif clause in a __KERNEL__ guard in linux/soundcard.h UAPI: Fix AHZ multiple inclusion when __KERNEL__ is removed UAPI: Make linux/patchkey.h easier to parse UAPI: Fix nested __KERNEL__ guards in video/edid.h UAPI: Alter the S390 asm include guards to be recognisable by the UAPI splitter UAPI: Guard linux/cuda.h UAPI: Guard linux/pmu.h UAPI: Guard linux/isdn_divertif.h UAPI: Guard linux/sound.h UAPI: Rearrange definition of HZ in asm-generic/param.h UAPI: Make FRV use asm-generic/param.h UAPI: Make M32R use asm-generic/param.h UAPI: Make MN10300 use asm-generic/param.h UAPI: elf_read_implies_exec() is a kernel-only feature - so hide from userspace UAPI: Don't include linux/compat.h in sparc's asm/siginfo.h UAPI: Fix arch/mips/include/asm/Kbuild to have separate header-y lines
2012-01-12treewide: convert uses of ATTRIB_NORETURN to __noreturnJoe Perches
Use the more commonly used __noreturn instead of ATTRIB_NORETURN. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Joe Perches <joe@perches.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Chris Metcalf <cmetcalf@tilera.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-01-12treewide: remove useless NORET_TYPE macro and usesJoe Perches
It's a very old and now unused prototype marking so just delete it. Neaten panic pointer argument style to keep checkpatch quiet. Signed-off-by: Joe Perches <joe@perches.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Chris Metcalf <cmetcalf@tilera.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-01-09Merge branch 'for-3.3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu * 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: percpu: Remove irqsafe_cpu_xxx variants Fix up conflict in arch/x86/include/asm/percpu.h due to clash with cebef5beed3d ("x86: Fix and improve percpu_cmpxchg{8,16}b_double()") which edited the (now removed) irqsafe_cpu_cmpxchg*_double code.
2012-01-09Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (31 commits) [S390] disassembler: mark exception causing instructions [S390] Enable exception traces by default [S390] return address of compat signals [S390] sysctl: get rid of dead declaration [S390] dasd: fix fixpoint divide exception in define_extent [S390] dasd: add sanity check to detect path connection error [S390] qdio: fix kernel panic for zfcp 31-bit [S390] Add s390x description to Documentation/kdump/kdump.txt [S390] Add VMCOREINFO_SYMBOL(high_memory) to vmcoreinfo [S390] dasd: fix expiration handling for recovery requests [S390] outstanding interrupts vs. smp_send_stop [S390] ipc: call generic sys_ipc demultiplexer [S390] zcrypt: Fix error return codes. [S390] zcrypt: Rework length parameter checking. [S390] cleanup trap handling [S390] Remove Kerntypes leftovers [S390] topology: increase poll frequency if change is anticipated [S390] entry[64].S improvements [S390] make arch/s390 subdirectories depend on config option [S390] kvm: move cmf host id constant out of lowcore ... Fix up conflicts in arch/s390/kernel/{smp.c,topology.c} due to the sysdev removal clashing with "topology: get rid of ifdefs" which moved some of that code around.
2012-01-08Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (53 commits) Kconfig: acpi: Fix typo in comment. misc latin1 to utf8 conversions devres: Fix a typo in devm_kfree comment btrfs: free-space-cache.c: remove extra semicolon. fat: Spelling s/obsolate/obsolete/g SCSI, pmcraid: Fix spelling error in a pmcraid_err() call tools/power turbostat: update fields in manpage mac80211: drop spelling fix types.h: fix comment spelling for 'architectures' typo fixes: aera -> area, exntension -> extension devices.txt: Fix typo of 'VMware'. sis900: Fix enum typo 'sis900_rx_bufer_status' decompress_bunzip2: remove invalid vi modeline treewide: Fix comment and string typo 'bufer' hyper-v: Update MAINTAINERS treewide: Fix typos in various parts of the kernel, and fix some comments. clockevents: drop unknown Kconfig symbol GENERIC_CLOCKEVENTS_MIGR gpio: Kconfig: drop unknown symbol 'CS5535_GPIO' leds: Kconfig: Fix typo 'D2NET_V2' sound: Kconfig: drop unknown symbol ARCH_CLPS7500 ... Fix up trivial conflicts in arch/powerpc/platforms/40x/Kconfig (some new kconfig additions, close to removed commented-out old ones)
2012-01-08Merge branch 'pm-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm * 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (76 commits) PM / Hibernate: Implement compat_ioctl for /dev/snapshot PM / Freezer: fix return value of freezable_schedule_timeout_killable() PM / shmobile: Allow the A4R domain to be turned off at run time PM / input / touchscreen: Make st1232 use device PM QoS constraints PM / QoS: Introduce dev_pm_qos_add_ancestor_request() PM / shmobile: Remove the stay_on flag from SH7372's PM domains PM / shmobile: Don't include SH7372's INTCS in syscore suspend/resume PM / shmobile: Add support for the sh7372 A4S power domain / sleep mode PM: Drop generic_subsys_pm_ops PM / Sleep: Remove forward-only callbacks from AMBA bus type PM / Sleep: Remove forward-only callbacks from platform bus type PM: Run the driver callback directly if the subsystem one is not there PM / Sleep: Make pm_op() and pm_noirq_op() return callback pointers PM/Devfreq: Add Exynos4-bus device DVFS driver for Exynos4210/4212/4412. PM / Sleep: Merge internal functions in generic_ops.c PM / Sleep: Simplify generic system suspend callbacks PM / Hibernate: Remove deprecated hibernation snapshot ioctls PM / Sleep: Fix freezer failures due to racy usermodehelper_is_disabled() ARM: S3C64XX: Implement basic power domain support PM / shmobile: Use common always on power domain governor ... Fix up trivial conflict in fs/xfs/xfs_buf.c due to removal of unused XBT_FORCE_SLEEP bit
2012-01-08Merge branch 'for-linus2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs * 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (165 commits) reiserfs: Properly display mount options in /proc/mounts vfs: prevent remount read-only if pending removes vfs: count unlinked inodes vfs: protect remounting superblock read-only vfs: keep list of mounts for each superblock vfs: switch ->show_options() to struct dentry * vfs: switch ->show_path() to struct dentry * vfs: switch ->show_devname() to struct dentry * vfs: switch ->show_stats to struct dentry * switch security_path_chmod() to struct path * vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb vfs: trim includes a bit switch mnt_namespace ->root to struct mount vfs: take /proc/*/mounts and friends to fs/proc_namespace.c vfs: opencode mntget() mnt_set_mountpoint() vfs: spread struct mount - remaining argument of next_mnt() vfs: move fsnotify junk to struct mount vfs: move mnt_devname vfs: move mnt_list to struct mount vfs: switch pnode.h macros to struct mount * ...
2012-01-07Merge branch 'driver-core-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core * 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (73 commits) arm: fix up some samsung merge sysdev conversion problems firmware: Fix an oops on reading fw_priv->fw in sysfs loading file Drivers:hv: Fix a bug in vmbus_driver_unregister() driver core: remove __must_check from device_create_file debugfs: add missing #ifdef HAS_IOMEM arm: time.h: remove device.h #include driver-core: remove sysdev.h usage. clockevents: remove sysdev.h arm: convert sysdev_class to a regular subsystem arm: leds: convert sysdev_class to a regular subsystem kobject: remove kset_find_obj_hinted() m86k: gpio - convert sysdev_class to a regular subsystem mips: txx9_sram - convert sysdev_class to a regular subsystem mips: 7segled - convert sysdev_class to a regular subsystem sh: dma - convert sysdev_class to a regular subsystem sh: intc - convert sysdev_class to a regular subsystem power: suspend - convert sysdev_class to a regular subsystem power: qe_ic - convert sysdev_class to a regular subsystem power: cmm - convert sysdev_class to a regular subsystem s390: time - convert sysdev_class to a regular subsystem ... Fix up conflicts with 'struct sysdev' removal from various platform drivers that got changed: - arch/arm/mach-exynos/cpu.c - arch/arm/mach-exynos/irq-eint.c - arch/arm/mach-s3c64xx/common.c - arch/arm/mach-s3c64xx/cpu.c - arch/arm/mach-s5p64x0/cpu.c - arch/arm/mach-s5pv210/common.c - arch/arm/plat-samsung/include/plat/cpu.h - arch/powerpc/kernel/sysfs.c and fix up cpu_is_hotpluggable() as per Greg in include/linux/cpu.h
2012-01-06vfs: switch ->show_options() to struct dentry *Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1958 commits) net: pack skb_shared_info more efficiently net_sched: red: split red_parms into parms and vars net_sched: sfq: extend limits cnic: Improve error recovery on bnx2x devices cnic: Re-init dev->stats_addr after chip reset net_sched: Bug in netem reordering bna: fix sparse warnings/errors bna: make ethtool_ops and strings const xgmac: cleanups net: make ethtool_ops const vmxnet3" make ethtool ops const xen-netback: make ops structs const virtio_net: Pass gfp flags when allocating rx buffers. ixgbe: FCoE: Add support for ndo_get_fcoe_hbainfo() call netdev: FCoE: Add new ndo_get_fcoe_hbainfo() call igb: reset PHY after recovering from PHY power down igb: add basic runtime PM support igb: Add support for byte queue limits. e1000: cleanup CE4100 MDIO registers access e1000: unmap ce4100_gbe_mdio_base_virt in e1000_remove ...
2012-01-06Merge branch 'driver-core-next' into Linux 3.2Greg Kroah-Hartman
This resolves the conflict in the arch/arm/mach-s3c64xx/s3c6400.c file, and it fixes the build error in the arch/x86/kernel/microcode_core.c file, that the merge did not catch. The microcode_core.c patch was provided by Stephen Rothwell <sfr@canb.auug.org.au> who was invaluable in the merge issues involved with the large sysdev removal process in the driver-core tree. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2012-01-06Merge branch 'sched-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits) sched/tracing: Add a new tracepoint for sleeptime sched: Disable scheduler warnings during oopses sched: Fix cgroup movement of waking process sched: Fix cgroup movement of newly created process sched: Fix cgroup movement of forking process sched: Remove cfs bandwidth period check in tg_set_cfs_period() sched: Fix load-balance lock-breaking sched: Replace all_pinned with a generic flags field sched: Only queue remote wakeups when crossing cache boundaries sched: Add missing rcu_dereference() around ->real_parent usage [S390] fix cputime overflow in uptime_proc_show [S390] cputime: add sparse checking and cleanup sched: Mark parent and real_parent as __rcu sched, nohz: Fix missing RCU read lock sched, nohz: Set the NOHZ_BALANCE_KICK flag for idle load balancer sched, nohz: Fix the idle cpu check in nohz_idle_balance sched: Use jump_labels for sched_feat sched/accounting: Fix parameter passing in task_group_account_field sched/accounting: Fix user/system tick double accounting sched/accounting: Re-use scheduler statistics for the root cgroup ... Fix up conflicts in - arch/ia64/include/asm/cputime.h, include/asm-generic/cputime.h usecs_to_cputime64() vs the sparse cleanups - kernel/sched/fair.c, kernel/time/tick-sched.c scheduler changes in multiple branches
2012-01-06Merge branch 'perf-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (106 commits) perf kvm: Fix copy & paste error in description perf script: Kill script_spec__delete perf top: Fix a memory leak perf stat: Introduce get_ratio_color() helper perf session: Remove impossible condition check perf tools: Fix feature-bits rework fallout, remove unused variable perf script: Add generic perl handler to process events perf tools: Use for_each_set_bit() to iterate over feature flags perf tools: Unify handling of features when writing feature section perf report: Accept fifos as input file perf tools: Moving code in some files perf tools: Fix out-of-bound access to struct perf_session perf tools: Continue processing header on unknown features perf tools: Improve macros for struct feature_ops perf: builtin-record: Document and check that mmap_pages must be a power of two. perf: builtin-record: Provide advice if mmap'ing fails with EPERM. perf tools: Fix truncated annotation perf script: look up thread using tid instead of pid perf tools: Look up thread names for system wide profiling perf tools: Fix comm for processes with named threads ...
2012-01-06Merge branch 'core-rcu-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (64 commits) cpu: Export cpu_up() rcu: Apply ACCESS_ONCE() to rcu_boost() return value Revert "rcu: Permit rt_mutex_unlock() with irqs disabled" docs: Additional LWN links to RCU API rcu: Augment rcu_batch_end tracing for idle and callback state rcu: Add rcutorture tests for srcu_read_lock_raw() rcu: Make rcutorture test for hotpluggability before offlining CPUs driver-core/cpu: Expose hotpluggability to the rest of the kernel rcu: Remove redundant rcu_cpu_stall_suppress declaration rcu: Adaptive dyntick-idle preparation rcu: Keep invoking callbacks if CPU otherwise idle rcu: Irq nesting is always 0 on rcu_enter_idle_common rcu: Don't check irq nesting from rcu idle entry/exit rcu: Permit dyntick-idle with callbacks pending rcu: Document same-context read-side constraints rcu: Identify dyntick-idle CPUs on first force_quiescent_state() pass rcu: Remove dynticks false positives and RCU failures rcu: Reduce latency of rcu_prepare_for_idle() rcu: Eliminate RCU_FAST_NO_HZ grace-period hang rcu: Avoid needlessly IPIing CPUs at GP end ...
2012-01-06Merge branch 'core-memblock-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'core-memblock-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits) memblock: Reimplement memblock allocation using reverse free area iterator memblock: Kill early_node_map[] score: Use HAVE_MEMBLOCK_NODE_MAP s390: Use HAVE_MEMBLOCK_NODE_MAP mips: Use HAVE_MEMBLOCK_NODE_MAP ia64: Use HAVE_MEMBLOCK_NODE_MAP SuperH: Use HAVE_MEMBLOCK_NODE_MAP sparc: Use HAVE_MEMBLOCK_NODE_MAP powerpc: Use HAVE_MEMBLOCK_NODE_MAP memblock: Implement memblock_add_node() memblock: s/memblock_analyze()/memblock_allow_resize()/ and update users memblock: Track total size of regions automatically powerpc: Cleanup memblock usage memblock: Reimplement memblock_enforce_memory_limit() using __memblock_remove() memblock: Make memblock functions handle overflowing range @size memblock: Reimplement __memblock_remove() using memblock_isolate_range() memblock: Separate out memblock_isolate_range() from memblock_set_node() memblock: Kill memblock_init() memblock: Kill sentinel entries at the end of static region arrays memblock: Add __memblock_dump_all() ...
2012-01-03consolidate umode_t declarationsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-03hypfs: umode_t noise and properly spelled S_ISDIR/S_ISREGAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-03switch debugfs to umode_tAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-12-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
2011-12-29procfs: do not confuse jiffies with cputime64_tAndreas Schwab
Commit 2a95ea6c0d129b4 ("procfs: do not overflow get_{idle,iowait}_time for nohz") did not take into account that one some architectures jiffies and cputime use different units. This causes get_idle_time() to return numbers in the wrong units, making the idle time fields in /proc/stat wrong. Instead of converting the usec value returned by get_cpu_{idle,iowait}_time_us to units of jiffies, use the new function usecs_to_cputime64 to convert it to the correct unit of cputime64_t. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Acked-by: Michal Hocko <mhocko@suse.cz> Cc: Arnd Bergmann <arnd@arndb.de> Cc: "Artem S. Tashkinov" <t.artem@mailcity.com> Cc: Dave Jones <davej@redhat.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-12-27[S390] disassembler: mark exception causing instructionsHeiko Carstens
If an exception happens the PSW either points to the instruction that caused the exception or to the instruction that follows the exception causing instruction, depending on the exception type. Since the inkernel disassembler adds a ">" in front of the disassembly many people assume incorrectly that the instruction that is pointed to must be the cause of the exception. To make people aware that this is not necessarily the case add a different character in front of the disassembled instruction that precedes the current instructions. The output now looks like this: Krnl PSW : 0704200180000000 0000000000120de8 (test_function+0x0/0x100) R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:0 CC:2 PM:0 EA:3 Krnl GPRS: 000003ff00000000 0000000000120de4 000000000091bb40 0000000000000001 000003fffd2ea000 0000000030fb7df8 0000000030fb7f10 000003ffffa113c8 000000000091bb40 000003fffd2ea000 0000000000000002 0000000030fb7f10 000000003f290240 0000000000606220 00000000002cfb5c 0000000030fb7d58 Krnl Code: 0000000000120ddc: b90400a9 lgr %r10,%r9 0000000000120de0: a7f4ff88 brc 15,120cf0 #0000000000120de4: a7f40001 brc 15,120de6 >0000000000120de8: a7f13f80 tmll %r15,16256 0000000000120dec: eb8ff0580024 stmg %r8,%r15,88(%r15) 0000000000120df2: a7840001 brc 8,120df4 0000000000120df6: b90400ef lgr %r14,%r15 0000000000120dfa: a7fbffb8 aghi %r15,-72 Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] Enable exception traces by defaultHeiko Carstens
Enable exception traces by default so that early user space breakage (e.g. broken code in initrd) can be easily indentified. If not needed afterwards it can be disabled by writing '0' in one of these two files: /proc/sys/kernel/userprocess_debug /proc/sys/debug/exception-trace Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] return address of compat signalsMartin Schwidefsky
A 31-bit kernel always sets the high order bit in the return address for a signal handler. git commit d4e81b35b882d96f "[S390] allow all addressing modes" makes sure that the high order bit is set in the signal return address for standard signals of a 31-bit compat process but fails to do the same for real-time signals. To make things consistent the bit needs to be set by setup_rt_frame32 as well. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] sysctl: get rid of dead declarationHeiko Carsten
Remove dead sysctl_userprocess_debug. The variable is gone since we map our old userprocess_debug sysctl to the common code show_unhandled_signals sysctl on s390. Signed-off-by: Heiko Carsten <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] qdio: fix kernel panic for zfcp 31-bitSteffen Maier
The queue_start_poll function pointer field in struct qdio_initialize had to change its type and become a vector of function pointers to support asynchronous delivery of storage blocks so rename the field to make the type change explicit and ensure no other user of qdio tries to use the field the old way. During setting up the qdio queues, only dereference vector elements if the vector is actually allocated. Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Signed-off-by: Einar Lueck <elelueck@de.ibm.com> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] Add VMCOREINFO_SYMBOL(high_memory) to vmcoreinfoMichael Holzheu
Currently the vmalloc_start address (or better end of real memory) for s390x is obtained by makedumpfile using vmlist.addr symbol, which is not correct. The correct vmalloc_start address can be obtained using 'high_memory' symbol. This patch adds the high_memory symbol to vmcoreinfo. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] outstanding interrupts vs. smp_send_stopMartin Schwidefsky
The panic function will first print the panic message to the console, then stop additional cpus with smp_send_stop and finally call the function on the panic notifier list. In case of an I/O based console the panic message will cause I/O to be started and a function on the panic notifier list will wait for the completion of the I/O. That does not work if an I/O completion interrupt has already been delivered to a cpu that is then stopped by smp_send_stop. To break this cyclic dependency add code to smp_send_stop that gives the additional cpu the opportunity to complete outstanding interrupts. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] ipc: call generic sys_ipc demultiplexerHeiko Carstens
Call generic IPC demultiplexer instead of having a nearly identical s390 variant. Also make sure that native and compat handling now have the same behaviour. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] cleanup trap handlingMartin Schwidefsky
Move the program interruption code and the translation exception identifier to the pt_regs structure as 'int_code' and 'int_parm_long' and make the first level interrupt handler in entry[64].S store the two values. That makes it possible to drop 'prot_addr' and 'trap_no' from the thread_struct and to reduce the number of arguments to a lot of functions. Finally un-inline do_trap. Overall this saves 5812 bytes in the .text section of the 64 bit kernel. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] Remove Kerntypes leftoversHeiko Carstens
Remove last traces of our kerntypes patch which was always an addon patch which never got upstream. Somehow a few bits got upstream anyway. Since kerntypes aren't used anymore and lcrash isn't maintained (for s390 at least) remove the last traces of kerntypes that somehow went upstream. Also remove the documentation that mentions lcrash. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] topology: increase poll frequency if change is anticipatedHeiko Carstens
Increase cpu topology change poll frequency if a change is anticipated. Otherwise a user might be a bit confused to have to wait up to a minute in order to see a change this should be visible immediatly. However there is no guarantee that the change will happen during the time frame the poll frequency is increased. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] entry[64].S improvementsMartin Schwidefsky
Another round of cleanup for entry[64].S, in particular the program check handler looks more reasonable now. The code size for the 31 bit kernel has been reduced by 616 byte and by 528 byte for the 64 bit version. Even better the code is a bit faster as well. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] make arch/s390 subdirectories depend on config optionJan Glauber
Only add subdirectories of arch/s390 to kbuild if their respective config option is selected. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] kvm: move cmf host id constant out of lowcoreMartin Schwidefsky
There is no reason for the cpu-measurement-facility host id constant to reside in the lowcore where space is precious. Use an entry in the literal pool in HANDLE_SIE_INTERCEPT and a stack slot in sie64a. While we are at it replace the id -1 with 0 to indicate host execution. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] topology: cleanup z10 topology handlingHeiko Carstens
Cleanup z10 topology handling. This adds some more code but hopefully the result is more readable and easier to maintain. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] disable MACHINE_IS_VM check for pfaultCarsten Otte
This patch disables the check for MACHINE_IS_VM when initializing the pfault infrastructure. The code checks for successful completion of diag 258 anyway, thus it's safe to try initialization on LPAR anyway. This is needed to use pfault on kvm Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] topology: get rid of ifdefsHeiko Carstens
Remove all ifdefs from topology code and also only compile it for the CONFIG_SCHED_BOOK case. The new code selects SCHED_MC if SCHED_BOOK is selected. SCHED_MC without SCHED_BOOK is not possible anymore. Furthermore various sysfs attributes are not available anymore for the !SCHED_BOOK case. In particular all attributes that correspond to CPU polarization. But since all real world kernels have SCHED_BOOK selected anyway this doesn't matter too much. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] kernel: Fix smp_switch_to_ipl_cpu() stack frame setupMichael Holzheu
Currently, when smp_switch_to_ipl_cpu() is done, the backchain in the dump analysis tool crash looks like the following: #0 [1f746e70] __machine_kexec at 11dd92 #1 [1f746eb8] smp_restart_cpu at 11820e #0 [00907eb0] cpu_idle at 10602e #1 [00907ef8] start_kernel at 979a08 It would be good to see the registers of the interrupted function. To achieve this, the backchain on the new stack has to be set to zero. This looks then like the following: #0 [1f746e70] __machine_kexec at 11dd8e #1 [1f746eb8] smp_restart_cpu at 11820a PSW: 0706000180000000 00000000005c6fe6 (vtime_stop_cpu+134) GPRS: 0000000000000000 00000000005c6fe6 0000000001ad0228 0000000001ad0248 0000000000907f08 0000000001ad0b40 0000000000979344 0000000000000000 00000000009c0000 00000000009c0010 00000000009ab024 0000000001ad0200 0000000001ad0238 00000000005cc9d8 000000000010602e 0000000000907e68 #0 [00907eb0] cpu_idle at 10602e #1 [00907ef8] start_kernel at 979a08 In addition to this, now also the correct PSW is stored in the pt_regs structure that is located at the start of the panic stack. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27[S390] add support for physical memory > 4TBMartin Schwidefsky
The kernel address space of a 64 bit kernel currently uses a three level page table and the vmemmap array has a fixed address and a fixed maximum size. A three level page table is good enough for systems with less than 3.8TB of memory, for bigger systems four page table levels need to be used. Each page table level costs a bit of performance, use 3 levels for normal systems and 4 levels only for the really big systems. To avoid bloating sparse.o too much set MAX_PHYSMEM_BITS to 46 for a maximum of 64TB of memory. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>