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[SCM] systemtap: system-wide probe/trace tool annotated tag, release-1.0.9, created. release-1.0.9


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The annotated tag, release-1.0.9 has been created
        at  bd167234943f5ea0b67fbc531493e1eef7cb7065 (tag)
   tagging  7df91bcca3319ded571828011e8e22e9c19c9318 (commit)
  replaces  release-1.0
 tagged by  Frank Ch. Eigler
        on  Tue Dec 22 14:36:44 2009 -0500

- Log -----------------------------------------------------------------
1.0.9 prerelease
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Andre Detsch (1):
      Updates to SCSI tapset scsi.stp and corresponding testcases

Anton Vorontsov (9):
      Rename uprobes_ppc64.c to uprobes_ppc.c, use it for ppc32
      Rename stack-ppc64.c to stack-ppc.c
      stack-ppc: Adjust for ppc32
      Implement ppc32 variant of __is_user_regs
      Share ppc64 and ppc32 code where possible
      Implement _div64 and _mod64 for ppc32
      Change KERNEL_RELOC_SYMBOL to "_stext" on ppc32
      Use proper types for do_div
      Fix regression in statistic operations

Breno Leitao (4):
      Actually indent_thread() is a very useful function, but
      Fix for bug 10866 (exit with rc != 0 on script ERRORs).
      I forgot to change the NEWS file when commiting
      A very simple patch that fix the networking tapset documentation.

Breno Leitão (3):
      A new tapset that adds support for tty and serial devices
      A new testcase for tty tapset
      tty: Adding tty.stp to the documentation

Charley Wang (6):
      PR1062: runtime function
      PR10724: staprun: simplify permissions checking logic
      PR10849: make MAXSKIPPED overflow trigger an error message
      PR10877: Give token* to each component instead of each probe_point
      PR10877: Fix coveragedb.cxx to account for new components/token structure
      PR10901: Add -D_FILE_OFFSET_BITS=64 to Makefile.am for stap and staprun

Dave Brolley (94):
      Fix stap-server bug. --unprivileged not processed if processed as first argument.
      Generate safety net assertions in probe function not authorized for unprivileged users.
      Ensure that unprivileged-authorized probe point functions are hashed differently
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Infrastructure for new stap-server initscript.
      No stap-server/config file yet.
      stap-server initscript is now part of the systemtap-server package.
      stap-server initscript fully functional.
      Change temporary paths to their proper values.
      Specialized user to run stap-server and improved logging.
      In systemtap.spec create $RPM_BUILD_ROOT%{_localstatedir}/log before working in it.
      Add /var/log/stap-server.log to the files for the systemtap-server sub rpm.
      Add stap-server userid to the stap-server group when it is created.
      Change permissions and ownership of /var/log/systemtap.log after installation.
      stap-server initscript cleanup and follow fedora initscript requirements.
      Create /etc/sysconfig in %install.
      init.d/rc.d -> rc.d/init.d
      Rework for bugs found during testing.
      Never ask the user for a password in stap-gen-cert. Read from /dev/random as
      Use /dev/urandom (non-blocking) instead of /dev/random.
      Final cleanup of stap-server initscript and packaging.
      More logging for stap-server initscript.
      Redirect stap-serverd output to /dev/null.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Add NEWS entry for stap-server initscript.
      PR 9973: Sign uprobes.ko when it is created and load it using insert_module.
      Revert previous change re: home directory og stap-server. Ensure it has 755 privileges.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Revert change which loads uprobes.ko using insert_module.
      Don't reference global variable modpath in insert_module and its helpers.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Replace the use of the global variable 'modpath' in diagnostic
      Use 'module_realpath' instead of overwriting 'path' in insert_module.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Relax restrictions on ownership and access permissions of signer's cert database.
      Sign uprobes.ko with the builder's certificate.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      PR 10905 - Ensure that /usr/share/systemtap/runtime/uprobes is writeable by the
      Fix typo on command to create /usr/share/systemtap/runtime/uprobes.
      Report correct status when a server fails to start.
      Ensure that server status files are written by the initscript, not stap-start-server.
      Allow members of the group stap-server to build the uprobes module.
      Only attempt to change the group permissions of built items if we are root.
      Make built files and directories writeable by the stap-server group individually.
      Rework setting of group and permissions on generated files and directories.
      Ensure uprobes/Makefile never returns failure due to setting permissions.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      PR 10976, 10984. Loading of signed modules (script module and uprobes) limited to members of stapusr.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      include modverify.h unconditionally.
      - Allow root, the owner of the uprobes build directory and the members of the
      Improve error messages related to module signing.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      PR 10984 Additional Work. TOCTOU race checking access permissions before canonicalizing /lib/modules/KVER/systemtap.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Update NEWS and initscript/README.stap-server with details of changes
      Make sure system types are defined.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Regenerate autotools files using autoreconf to pick up latest Makefile.am changes.
      No need to pass -c option to the server.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      PR 10905 Ground Work: Save server status as PID files with the server config as contents.
      PR 10905: stap-server initscript improvements
      Clean up NSS after errors occur during verification.
      PR 10905: Initscript improvements: Automatically authorize the initscript servers as trusted servers and signers.
      Suppress output from stap-gen-cert when installing the systemtap-server package.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Don't automatically authorize new root certificates as trusted signers.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Remove unused variable.
      PR 10889: Reorganize client/server man pages. Document --unprivileged.
      Correct path to trusted signer's database.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      PR 10641: Do not allow -m when --unprivileged in the server.
      PR 10247 10276 10905: Infrastructure for moving underlying client/server tools to libexec.
      s/pkglibexecdir/libexecdir/systemtap/
      Some tools (temporarily) still in $bindir.
      PR 10247, 10276, 10905: Move remaining client/server tools to libexec.
      Don't install the entire %{libexecdir}/%{name} directory.
      Install %{libexecdir}/%{name}/stapio explicitely.
      Typos in install and rpm spec.
      Look for stap-start-server and stap-stop-server in libexec.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Get PATH correct for fidning libexec tools for installcheck.
      Make sure we log server activity when testing using a server.
      PR 10905: initscript improvements.
      Typo: @bindir -> @bindir@
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      NEWS entry for client/server/cert tools reorg.

David J. Wilder (2):
      Removing support for InMcastPkts, OutMcastPkts, InBcastPkts and
      This script (tcp_trace) can be used to trace tcp connection parameters and state changes.  This work was original inspired by Stephen Hemminger's TCP cwnd snooper (net/ipv4/tcp_probe.c). Tcp_trace is a helpful tool for troubleshooting connection performance issues.

David Smith (42):
      Forward-ported staplog.c crash support (PR 10644).
      Fix configure on systems without 'gcc -fgnu89-inline' support (rhel4).
      Better grapher option handling.
      Fixed grapher build problem caused by configure update.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Added a basic ring_buffer transport test.
      No longer need buffer iterators.
      Better cleanup.
      Added timeouts to test 15 & 16.
      Fixed grapher build.
      PR 10575.  Improves running target commands.
      Add boost-devel build requirement for the grapher.
      Updated checking for grapher dependencies.
      PR 10822 fixed by waiting for the procfs file.
      Removed extra declarations.
      Fix syscall testsuite bugs.
      context.exp test improvements.
      PR 6691 fixed by adding support for sys_accept4.
      PR 10706 fixed by switching to unbuffered output.
      Normalized whitespace and comments.
      PR 5150 partial fix.  Support nfs_write_begin()/nfs_write_end().
      PR 5150 partial fixes.  Added support for nfs_file_fsync.
      PR 10974 fix.  Fixed aux_syscalls.stp for RHEL5.
      Fixed aux_syscalls.stp for RHEL4.
      With tapset/aux_syscalls.stp fixes, test twentyseven.stp is not kfail.
      PR 5150.  Fixed nfs tapset by making probes optional.
      Don't kfail buildok/sched_test.stp and buildok/process_test.stp.
      PR 10981.  Fixed buildok/netdev.stp for RHEL5.
      Fixed tapset reference manual generation.
      Updated.
      Don't let _stp_alloc_percpu allocate too much memory.
      Fix PR 11034 by directly allocating per-cpu context data.
      Small compile server shutdown fix.
      PR 10641 fixed by checking module name in unprivileged mode.
      Revert "PR 10641 fixed by checking module name in unprivileged mode."
      PR 10848 partial fix by using systemtap memory functions everywhere.
      Fixed DEBUG_MEM debug memory tracking.
      PR 11097 fixed by correcting MAXNESTING test.
      PR11113 fix.  Support new utrace API.
      Incremented version number for release 1.1.
      Fixed compilation on f11.
      Fixed ia64 compile problem with runtime/stack-ia64.c.

Don Domingo (7):
      minor modifications to allow book to build in latest Publican (1.x). to build in older versions of Publican, use old-syncandbuild.sh
      minor modifications to allow book to build in latest Publican (1.x). to build in older versions of Publican, use old-syncandbuild.sh
      minor modifications to allow book to build in latest Publican (1.x). to build in older versions of Publican, use old-syncandbuild.sh
      minor modifications to allow book to build in latest Publican (1.x). to build in older versions of Publican, use old-syncandbuild.sh
      minor modifications to allow book to build in latest Publican (1.x). to build in older versions of Publican, use old-syncandbuild.sh
      correcting license, forgot to change back yesterday while testing default Publican 1 license
      minor correction

Eugene Teo (1):
      plimit: Add plimit.stp sample script

Eugeniy Meshcheryakov (2):
      Do not use condition_codes() on arm
      Don't save build-id if it is located before _stext

Frank Ch. Eigler (59):
      PR10390: ftrace() tapset function
      PR10632: simplify randint() implementation
      PR10632: make randint() unprivileged
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      cleanup: tweak "read-only <variable>" message
      tapset docs cleanup
      build fix: use boost shared_ptr if libstdc++ to old to have <tr1/memory>
      doc build: support older xmlto without --stringparm option
      indent tapset: make O(1) rather than O(n)
      build: fix !HAVE_NSS case
      PR10702: preprocessor conditional for kernel CONFIG_foo
      testsuite: robustify check_* invocation of examples meta
      examples: add mbrwatch sample
      examples: regen indexes
      PR10746: improve error message on utrace-less kernels
      parse: fix CONFIG_ matching typo
      PR10761: pass -v's to final "staprun -d" if appropriate
      runtime shutdown errors: simplify, improve error specificity
      check for module-building Makefile more clearly
      PR10331: improve nss error message handling
      PR10331: more ssl error text
      PR10331: build fix for older nss
      PR10331: build fix for older nss redux
      provide error message token/context if loc2c doesn't
      PR10799: warn on possibly uintended local-vs-global namespace collision
      bemoan that _stp_*printf can't be protected with gcc attribute printf
      RHBZ519314: define task_struct cast to operate without debuginfo
      PR10839: compute default KRETACTIVE from num_possible_cpus() instead of NR_CPUS
      regen sample indexes with plimit.stp
      reorganize app tests; rewrite tcl as sample of improvements
      expand comment on has_return=0 treatment of -L foo.return probes
      PR10927: undocument nonexistent do/while construct
      build: quiet down xmlto tests and runs
      PR4037: 32-bit staprun vs. 64-bit kernels just works (tm)
      build: disable make-silent mode in rpm builds
      cleanup: explain -5 magic value used in map-sorting code
      docs: abbreviated stap-server news blurbs
      uprobes ppc64: UPROBES_DEBUG build fix
      runtime: print stp_alloc statistics in startup printk
      runtime: undefine DEBUG_MEM, retain alloc counting
      runtime build: fix alloc.c buildability on old gcc 3.4
      PR10601: comment on loc2c's use of [u]intptr_t for temp values
      PR10601 part 1: i386 and x86-64 regset for dwarf fetch/store_register()s
      PR10601 cont'd, RHEL5 backward compatibility with more runtime/autoconf*
      runtime backtracing: port commit #2e7f8442 to uprobes1
      dwarf probes: skip inlined instances with null (buggy) entrypc
      RHBZ543529: Make implicit -BCONFIG_MODULE_SIG=n
      runtime: rhel4 build fix for uretprobe-wannabe stack tracebacks
      documentation: remove docs for nonexistentn perfctr probes
      PR10601: unfork deref()
      runtime: more build fix for non-utrace kernels
      brown paper bag typo fixy
      PR10601: cleanup for i386, x86-64
      Revert "Incremented version number for release 1.1."
      v1.0.9 pre-release renumbering
      rhel5 spec customizations
      sdt.h semaphore: use get_user / put_user instead of __access_process_vm.
      semaphore typo fix
      ppc stack: transcribe portions of modern kernel ppc/.../asm/ptrace.h

Josh Stone (39):
      AUTHORS update
      Try to build tracequery for all headers at once
      Simplify copy_file calls
      Remove cached signature files along with modules
      Add -Werror to tracequery build
      Updates samples index for sched_switch
      AUTHORS bump for Kiran
      PR10726: Get the correct scope for statement(NUM)
      Remove the global derived_probe->semaphore map
      Add a test for CONFIG_FOO wildcards
      Let semko/utrace.stp fail even with CONFIG_UTRACE=y
      Add buildok tests for sprint[ln](@hist_*)
      Refactor some of the histogram printing
      Consolidate print_format creation
      Merge branch 'master' of sourceware.org:/git/systemtap
      Fix $$targets in dwarf probes
      Improve some runtime struct layouts
      PR10750: Enforce a reasonable limit on # of varargs
      PR10750 cont'd: Build with -Wframe-larger-than=512
      Ensure that DWARF keeps loc2c to a reasonable stack depth
      Relax the -Wframe-larger-than check
      Refactor probe locking into shared functions
      Correct the safety-net escape WRT locking
      Enable Kbuild-like quiet builds
      PR10854: Use a mutex around transport startup/shutdown
      PR10854 cont'd: Add a testcase for the reproducer
      Properly close the spawn of the pr10854 testcase
      Normalize Breno Leitao's name without an accent
      Constrain $var-checking for -L of .return probes
      Fix a comment typo
      Only .3stap.in files should be committed
      Fix stapprobes.irq title and add to install list
      Add blank lines for formatting stapprobes.irq
      PR5916: Exploit kretprobe data storage area
      Delete test commit file
      Regen indexes for interrupts-by-dev example
      Test cross-CU type discovery
      PR10983: Give preference to tracepoints in trace/events/
      PR11112: Check the full %m/M buffer, and limit the length

Kiran Prakesh (1):
      Scheduler Tapset based on kernel tracepoints

Mark Wielaard (52):
      Purge warnings from buildok testsuite.
      PR10700 Add newline after log() message.
      Factor out duplicated code to setup kernel/module Dwfl from dwflpp/translate.
      Use dwlpp::setup_kernel for tracepoint modules.
      Handle full path .ko modules in setup_dwfl_kernel.
      Factor out duplicated code to setup user/module Dwfl from dwflpp/translate.
      Handle non-regex full path kernel module dwfl setup earlier.
      Cache Dwfl's for reuse between pass 2 and pass 3.
      PR10678 module reloc refers to symbol in dwarf refer to kernel symbols.
      Print total memory usage in verbose mode after pass 1, 2 and 3.
      Grapher support now also needs libglademm24-devel, version 2.6.7 or higher.
      PR10678 vta-gcc: module debuginfo: relocation refers to undefined symbol
      loc2c discontiguify loops for not small enough loc_constant.
      Make sure loc2c declare_noncontig_union for different locs don't overlap.
      Handle DW_AT_const_value as alternative to location description.
      Add tescase for DW_AT_const_value location descriptions.
      NEWS: Better gcc 4.5 DWARF support (kernel module deps, DW_AT_const_value).
      PR10739 testcase. Split const_value test in two. Absolute const addr fails.
      PR10726 remove testcase workaround.
      Add proc_mem tapset, functions to query memory usage of the current process.
      tapset/proc_mem.stp: Document function parameters.
      Add task_time tapset, functions to query time resource usage of current task.
      Add DTRACE_PROBE10.
      Fix transok/tval-opt.stp testcase. Pick diffent function and non-empty block.
      Add limit on unwind table size we accept.
      Be paranoid about table size resolving cie_for_fde and fde_pointer_type.
      Make sure cie and fde end point to sane values in while doing unwind_frame.
      Limit the number of call frame instructions we process in the unwinder.
      Merge branch 'unwind_robust'
      PR10923 Handle AT_frame_base given by DW_OP_call_frame_cfa in .debug_frame.
      Mark usymname as unprivileged.
      Add documentation for conversions.stp tapset functions.
      Accept relative user module paths for -d.
      Turn ctime.stp documentation into proper Tapset Reference markup.
      Define IRQF_ONESHOT for older kernels.
      PR10622 Search for extern $variables in symbol table.
      Add documentation for ansi.stp tapset.
      Allow modules to trigger task_finder vma_tracker.
      PR10010 Support $globals in shared libraries.
      Add testcase for retrieving $global vars from execs and shared libs.
      Explain "cheat" comment in sym.c (_stp_tf_mmap_cb).
      Remove caching of emit_address for kernel modules and shared libraries.
      Use DW_AT_MIPS_linkage_name when available in vardie_from_symtable.
      Search other CUs of the module when resolving declarations.
      Document is_return(), module_name() and stp_pid() context tapset functions.
      Check in regenerated systemtap example indexes.
      Add assert for detecting shared library reloading, PR11015.
      Convert string.stp documentation to standard markup.
      Add dtrace -I support.
      Remove externalvar.exp .exe and .so after test done.
      PR11015 Support shared library reloading (in different processes)
      PR11038 Trailing semicolon as null-statement confusing.

Masami Hiramatsu (1):
      PR11020: Check switch_file global flag inside inner loop for busy scripts

Prerna Saxena (4):
      IRQ tapset, sample script, testsuite, man page updates, etc
      Adding a new .meta file to run interrupts-by-dev.stp in test
      add definition of function irqflags_str()
      Added tracepoint-based probes to block IO and IO scheduler tapsets.

Przemyslaw Pawelczyk (3):
      Add the .call modifier to syscall entry probes.
      PR5434: Fix syscall.nfsservctl.
      PR10257: Add support for sprint[ln](@hist_*).

Rajasekhar Duddu (2):
      Tracepoint based tapset for memory subsystem.
      Tracepoint based tapset for memory - changes to NEWS and tapset/memory.stp that got left out in earlier commit 0c487e433fd6343e49b1e9dbc6492f38cfe26143.

Robb Romans (2):
      Add information about userspace probing
      Delete trailing whitespace

Roland Grunberg (2):
      PR10632: tapset: randint() function + tests
      PR10849: Support MAXSKIPPED handling on RHEL4 through implementation of atomic_cmpxchg

Roland McGrath (7):
      Support DW_AT_const_value cases in loc2c and loc2c-test.
      Report experssion stack slot use back from loc2c.
      PR6979: fix loc2c handling of second and later pieces
      Fix uninitialized fields in loc2c.
      Fix compilation error, use getgroups without fixed limits.
      PR10653: don't corrupt signal structs in itrace on rawhide utrace
      Begin to parameterize loc2c for proper DWARF target address size.

Srikar Dronamraju (1):
      Avoid lockdep warnings.

Stan Cox (11):
      * tapsets.cxx (sdt_query::record_semaphore): Adjust addr relative to
      Add DEBUG_UPROBES for sdt semaphores.
      Add testsuite for tcl sdt markers.
      tcl.exp path fix.
      Added testsuite to test xulrunner sdt markers.
      Add .library("lib").mark("mark") and use it for .mark semaphores.
      Handle .probes section big endian 32 bit case.
      Use env(SYSTEMTAP_TESTAPPS) for all systemtap.apps
      Fix handling of multiple sdt uprobes with the same name.
      Recalculate sem address when tid changes.
      Cleanup in testsuite/system.apps

Tim Moore (60):
      Draw multiple graphs
      more multiple graph fixes
      Add graph data chooser window, based on glade
      Create lists of graph data to choose
      grapher: Handle the death of the child stap process
      cleanup of graph data dialog
      Pass command line arguments on to stap
      classes for launching stap and listening for its death
      dialog for choosing stap script and providing arguments to stap and the script
      Added man page for stapgraph
      Merge commit 'origin/master'
      cleanup of graph data parser, using Boost functions where useful
      Merge branch 'master' of ssh://sourceware.org/git/systemtap
      Change stap parser to use an input file descriptor other than stdin
      More refactoring for multiple stap processes.
      Kill off child processes correctly on exit.
      Merge branch 'master' of ssh://sourceware.org/git/systemtap
      Fix regression of parsing grapher options
      * grapher/GraphData.hxx (GraphDataBase, GraphData): Use
      Merge branch 'master' of ssh://sourceware.org/git/systemtap
      change time type from double to int64_t
      Add hover text to the graph.
      some aesthetic tweaks to the grapher
      Account for zoom factor when choosing hover text
      Refactor drawing of different styles of graph into classes
      Make the hover text conform to data displayed.
      Hover text for event-style graphs
      Error check in hover text code for empty graphs
      Merge commit 'origin/master'
      support multiline data output from scripts run under the grapher
      tweak multiline hover text to have proper interline spacing
      hover text on the additional graphs
      restore event square color
      Add new graph output to the last graph
      Add a missing cairo context restore()
      option to display graph times relative to the start time
      Merge branch 'master' of ssh://sourceware.org/git/systemtap
      Change data set list display to use a check box for inclusion in a graph
      make the list items in the data set list unselectable
      add copyright and license to grapher files
      tiny refactoring of signal and pipe code
      refactor list of data sets out of GraphWidget into a global data structure.
      grapher: start of a dialog for displaying active stap processes
      Merge commit 'origin/master'
      show the status of stap processes in the process window
      grapher: change SIGCHLD handling and exit cleanup
      grapher: more implementation stap process window
      grapher: integrate graph events from stdin with the stap process framework.
      Merge commit 'origin/master'
      grapher: implement restarting a stap process
      set the IP in return probes to the returned-to instruction
      function to translate from the uretprobe trampoline back to the original
      backtrace through uprobes trampoline.
      support for a brief backtrace format
      Merge commit 'origin/master'
      Remove uprobes.h declaration from runtime.h
      Merge commit 'origin/master'
      change namespace indentation to 0
      conditionalize pty_write count variable on kernel version
      Merge remote branch 'origin/master'

Wenji Huang (18):
      Make sys32_pipe probe available only before 2.6.32
      PR10746: update test cases related to probe process.*
      Merge branch 'master' of ssh://wenji@sources.redhat.com/git/systemtap
      fix 32-bit compatibility for @hist_log printing
      PR10820: stap -L ignores any variable that isn't accessible
      PR10466: print the set-intersection of variables retrieved from each branch
      PR10820-cont': initialize the fields of empty token
      Make interrupts-by-dev.stp executable
      Clean up examples
      Correct block IO and IO scheduler tapset and test case
      Tweak cu-decl test
      Fix compilation warning of passing NULL to int parameter
      Fix build error when !HAVE_NSS
      Fix typo in scheduler tapset
      Make tapset and tests compatible with old kernel
      Fix regression introduced by commit 379c585
      Fix typos in NEWS
      Update tapset related to struct inet_sock for 2.6.33

William Cohen (5):
      Correct tapset/ioscheduler.stp so documentation builds.
      Add function to generate saner html file names for langref.
      Add PROD2 to allow beginner's guide to be built again.
      Merge branch 'master' of ssh://sources.redhat.com/git/systemtap
      Remove blank line in ucontext-unwind.stp for SystemTap Tapset Reference Manual

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systemtap: system-wide probe/trace tool


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