6 files changed, 92 insertions, 220 deletions

diff --git a/Documentation/RCU/trace.txt b/Documentation/RCU/trace.txt
index 187bbf10c923..8608fd85e921 100644
--- a/Documentation/RCU/trace.txt
+++ b/Documentation/RCU/trace.txt
@@ -1,185 +1,10 @@
 CONFIG_RCU_TRACE debugfs Files and Formats
 
 
-The rcupreempt and rcutree implementations of RCU provide debugfs trace
-output that summarizes counters and state.  This information is useful for
-debugging RCU itself, and can sometimes also help to debug abuses of RCU.
-Note that the rcuclassic implementation of RCU does not provide debugfs
-trace output.
-
-The following sections describe the debugfs files and formats for
-preemptable RCU (rcupreempt) and hierarchical RCU (rcutree).
-
-
-Preemptable RCU debugfs Files and Formats
-
-This implementation of RCU provides three debugfs files under the
-top-level directory RCU: rcu/rcuctrs (which displays the per-CPU
-counters used by preemptable RCU) rcu/rcugp (which displays grace-period
-counters), and rcu/rcustats (which internal counters for debugging RCU).
-
-The output of "cat rcu/rcuctrs" looks as follows:
-
-CPU last cur F M
-  0    5  -5 0 0
-  1   -1   0 0 0
-  2    0   1 0 0
-  3    0   1 0 0
-  4    0   1 0 0
-  5    0   1 0 0
-  6    0   2 0 0
-  7    0  -1 0 0
-  8    0   1 0 0
-ggp = 26226, state = waitzero
-
-The per-CPU fields are as follows:
-
-o       "CPU" gives the CPU number.  Offline CPUs are not displayed.
-
-o       "last" gives the value of the counter that is being decremented
-        for the current grace period phase.  In the example above,
-        the counters sum to 4, indicating that there are still four
-        RCU read-side critical sections still running that started
-        before the last counter flip.
-
-o       "cur" gives the value of the counter that is currently being
-        both incremented (by rcu_read_lock()) and decremented (by
-        rcu_read_unlock()).  In the example above, the counters sum to
-        1, indicating that there is only one RCU read-side critical section
-        still running that started after the last counter flip.
-
-o       "F" indicates whether RCU is waiting for this CPU to acknowledge
-        a counter flip.  In the above example, RCU is not waiting on any,
-        which is consistent with the state being "waitzero" rather than
-        "waitack".
-
-o       "M" indicates whether RCU is waiting for this CPU to execute a
-        memory barrier.  In the above example, RCU is not waiting on any,
-        which is consistent with the state being "waitzero" rather than
-        "waitmb".
-
-o       "ggp" is the global grace-period counter.
-
-o       "state" is the RCU state, which can be one of the following:
-
-        o       "idle": there is no grace period in progress.
-
-        o       "waitack": RCU just incremented the global grace-period
-                counter, which has the effect of reversing the roles of
-                the "last" and "cur" counters above, and is waiting for
-                all the CPUs to acknowledge the flip.  Once the flip has
-                been acknowledged, CPUs will no longer be incrementing
-                what are now the "last" counters, so that their sum will
-                decrease monotonically down to zero.
-
-        o       "waitzero": RCU is waiting for the sum of the "last" counters
-                to decrease to zero.
-
-        o       "waitmb": RCU is waiting for each CPU to execute a memory
-                barrier, which ensures that instructions from a given CPU's
-                last RCU read-side critical section cannot be reordered
-                with instructions following the memory-barrier instruction.
-
-The output of "cat rcu/rcugp" looks as follows:
-
-oldggp=48870  newggp=48873
-
-Note that reading from this file provokes a synchronize_rcu().  The
-"oldggp" value is that of "ggp" from rcu/rcuctrs above, taken before
-executing the synchronize_rcu(), and the "newggp" value is also the
-"ggp" value, but taken after the synchronize_rcu() command returns.
-
-
-The output of "cat rcu/rcugp" looks as follows:
-
-na=1337955 nl=40 wa=1337915 wl=44 da=1337871 dl=0 dr=1337871 di=1337871
-1=50989 e1=6138 i1=49722 ie1=82 g1=49640 a1=315203 ae1=265563 a2=49640
-z1=1401244 ze1=1351605 z2=49639 m1=5661253 me1=5611614 m2=49639
-
-These are counters tracking internal preemptable-RCU events, however,
-some of them may be useful for debugging algorithms using RCU.  In
-particular, the "nl", "wl", and "dl" values track the number of RCU
-callbacks in various states.  The fields are as follows:
-
-o       "na" is the total number of RCU callbacks that have been enqueued
-        since boot.
-
-o       "nl" is the number of RCU callbacks waiting for the previous
-        grace period to end so that they can start waiting on the next
-        grace period.
-
-o       "wa" is the total number of RCU callbacks that have started waiting
-        for a grace period since boot.  "na" should be roughly equal to
-        "nl" plus "wa".
-
-o       "wl" is the number of RCU callbacks currently waiting for their
-        grace period to end.
-
-o       "da" is the total number of RCU callbacks whose grace periods
-        have completed since boot.  "wa" should be roughly equal to
-        "wl" plus "da".
-
-o       "dr" is the total number of RCU callbacks that have been removed
-        from the list of callbacks ready to invoke.  "dr" should be roughly
-        equal to "da".
-
-o       "di" is the total number of RCU callbacks that have been invoked
-        since boot.  "di" should be roughly equal to "da", though some
-        early versions of preemptable RCU had a bug so that only the
-        last CPU's count of invocations was displayed, rather than the
-        sum of all CPU's counts.
-
-o       "1" is the number of calls to rcu_try_flip().  This should be
-        roughly equal to the sum of "e1", "i1", "a1", "z1", and "m1"
-        described below.  In other words, the number of times that
-        the state machine is visited should be equal to the sum of the
-        number of times that each state is visited plus the number of
-        times that the state-machine lock acquisition failed.
-
-o       "e1" is the number of times that rcu_try_flip() was unable to
-        acquire the fliplock.
-
-o       "i1" is the number of calls to rcu_try_flip_idle().
-
-o       "ie1" is the number of times rcu_try_flip_idle() exited early
-        due to the calling CPU having no work for RCU.
-
-o       "g1" is the number of times that rcu_try_flip_idle() decided
-        to start a new grace period.  "i1" should be roughly equal to
-        "ie1" plus "g1".
-
-o       "a1" is the number of calls to rcu_try_flip_waitack().
-
-o       "ae1" is the number of times that rcu_try_flip_waitack() found
-        that at least one CPU had not yet acknowledge the new grace period
-        (AKA "counter flip").
-
-o       "a2" is the number of time rcu_try_flip_waitack() found that
-        all CPUs had acknowledged.  "a1" should be roughly equal to
-        "ae1" plus "a2".  (This particular output was collected on
-        a 128-CPU machine, hence the smaller-than-usual fraction of
-        calls to rcu_try_flip_waitack() finding all CPUs having already
-        acknowledged.)
-
-o       "z1" is the number of calls to rcu_try_flip_waitzero().
-
-o       "ze1" is the number of times that rcu_try_flip_waitzero() found
-        that not all of the old RCU read-side critical sections had
-        completed.
-
-o       "z2" is the number of times that rcu_try_flip_waitzero() finds
-        the sum of the counters equal to zero, in other words, that
-        all of the old RCU read-side critical sections had completed.
-        The value of "z1" should be roughly equal to "ze1" plus
-        "z2".
-
-o       "m1" is the number of calls to rcu_try_flip_waitmb().
-
-o       "me1" is the number of times that rcu_try_flip_waitmb() finds
-        that at least one CPU has not yet executed a memory barrier.
-
-o       "m2" is the number of times that rcu_try_flip_waitmb() finds that
-        all CPUs have executed a memory barrier.
+The rcutree implementation of RCU provides debugfs trace output that
+summarizes counters and state.  This information is useful for debugging
+RCU itself, and can sometimes also help to debug abuses of RCU.
+The following sections describe the debugfs files and formats.
 
 
 Hierarchical RCU debugfs Files and Formats
@@ -210,9 +35,10 @@ rcu_bh:
   6 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=859/1 dn=0 df=15 of=0 ri=0 ql=0 b=10
   7 c=-275 g=-275 pq=1 pqc=-275 qp=0 dt=3761/1 dn=0 df=15 of=0 ri=0 ql=0 b=10
 
-The first section lists the rcu_data structures for rcu, the second for
-rcu_bh.  Each section has one line per CPU, or eight for this 8-CPU system.
-The fields are as follows:
+The first section lists the rcu_data structures for rcu_sched, the second
+for rcu_bh.  Note that CONFIG_TREE_PREEMPT_RCU kernels will have an
+additional section for rcu_preempt.  Each section has one line per CPU,
+or eight for this 8-CPU system.  The fields are as follows:
 
 o       The number at the beginning of each line is the CPU number.
         CPUs numbers followed by an exclamation mark are offline,
@@ -223,9 +49,9 @@ o	The number at the beginning of each line is the CPU number.
 
 o       "c" is the count of grace periods that this CPU believes have
         completed.  CPUs in dynticks idle mode may lag quite a ways
-        behind, for example, CPU 4 under "rcu" above, which has slept
-        through the past 25 RCU grace periods.  It is not unusual to
-        see CPUs lagging by thousands of grace periods.
+        behind, for example, CPU 4 under "rcu_sched" above, which has
+        slept through the past 25 RCU grace periods.  It is not unusual
+        to see CPUs lagging by thousands of grace periods.
 
 o       "g" is the count of grace periods that this CPU believes have
         started.  Again, CPUs in dynticks idle mode may lag behind.
@@ -308,8 +134,10 @@ The output of "cat rcu/rcugp" looks as follows:
 rcu_sched: completed=33062  gpnum=33063
 rcu_bh: completed=464  gpnum=464
 
-Again, this output is for both "rcu" and "rcu_bh".  The fields are
-taken from the rcu_state structure, and are as follows:
+Again, this output is for both "rcu_sched" and "rcu_bh".  Note that
+kernels built with CONFIG_TREE_PREEMPT_RCU will have an additional
+"rcu_preempt" line.  The fields are taken from the rcu_state structure,
+and are as follows:
 
 o       "completed" is the number of grace periods that have completed.
         It is comparable to the "c" field from rcu/rcudata in that a
@@ -324,23 +152,24 @@ o	"gpnum" is the number of grace periods that have started.  It is
         If these two fields are equal (as they are for "rcu_bh" above),
         then there is no grace period in progress, in other words, RCU
         is idle.  On the other hand, if the two fields differ (as they
-        do for "rcu" above), then an RCU grace period is in progress.
+        do for "rcu_sched" above), then an RCU grace period is in progress.
 
 
 The output of "cat rcu/rcuhier" looks as follows, with very long lines:
 
-c=6902 g=6903 s=2 jfq=3 j=72c7 nfqs=13142/nfqsng=0(13142) fqlh=6
-1/1 0:127 ^0    
-3/3 0:35 ^0    0/0 36:71 ^1    0/0 72:107 ^2    0/0 108:127 ^3    
-3/3f 0:5 ^0    2/3 6:11 ^1    0/0 12:17 ^2    0/0 18:23 ^3    0/0 24:29 ^4    0/0 30:35 ^5    0/0 36:41 ^0    0/0 42:47 ^1    0/0 48:53 ^2    0/0 54:59 ^3    0/0 60:65 ^4    0/0 66:71 ^5    0/0 72:77 ^0    0/0 78:83 ^1    0/0 84:89 ^2    0/0 90:95 ^3    0/0 96:101 ^4    0/0 102:107 ^5    0/0 108:113 ^0    0/0 114:119 ^1    0/0 120:125 ^2    0/0 126:127 ^3    
+c=6902 g=6903 s=2 jfq=3 j=72c7 nfqs=13142/nfqsng=0(13142) fqlh=6 oqlen=0
+1/1 .>. 0:127 ^0    
+3/3 .>. 0:35 ^0    0/0 .>. 36:71 ^1    0/0 .>. 72:107 ^2    0/0 .>. 108:127 ^3    
+3/3f .>. 0:5 ^0    2/3 .>. 6:11 ^1    0/0 .>. 12:17 ^2    0/0 .>. 18:23 ^3    0/0 .>. 24:29 ^4    0/0 .>. 30:35 ^5    0/0 .>. 36:41 ^0    0/0 .>. 42:47 ^1    0/0 .>. 48:53 ^2    0/0 .>. 54:59 ^3    0/0 .>. 60:65 ^4    0/0 .>. 66:71 ^5    0/0 .>. 72:77 ^0    0/0 .>. 78:83 ^1    0/0 .>. 84:89 ^2    0/0 .>. 90:95 ^3    0/0 .>. 96:101 ^4    0/0 .>. 102:107 ^5    0/0 .>. 108:113 ^0    0/0 .>. 114:119 ^1    0/0 .>. 120:125 ^2    0/0 .>. 126:127 ^3    
 rcu_bh:
-c=-226 g=-226 s=1 jfq=-5701 j=72c7 nfqs=88/nfqsng=0(88) fqlh=0
-0/1 0:127 ^0    
-0/3 0:35 ^0    0/0 36:71 ^1    0/0 72:107 ^2    0/0 108:127 ^3    
-0/3f 0:5 ^0    0/3 6:11 ^1    0/0 12:17 ^2    0/0 18:23 ^3    0/0 24:29 ^4    0/0 30:35 ^5    0/0 36:41 ^0    0/0 42:47 ^1    0/0 48:53 ^2    0/0 54:59 ^3    0/0 60:65 ^4    0/0 66:71 ^5    0/0 72:77 ^0    0/0 78:83 ^1    0/0 84:89 ^2    0/0 90:95 ^3    0/0 96:101 ^4    0/0 102:107 ^5    0/0 108:113 ^0    0/0 114:119 ^1    0/0 120:125 ^2    0/0 126:127 ^3
+c=-226 g=-226 s=1 jfq=-5701 j=72c7 nfqs=88/nfqsng=0(88) fqlh=0 oqlen=0
+0/1 .>. 0:127 ^0    
+0/3 .>. 0:35 ^0    0/0 .>. 36:71 ^1    0/0 .>. 72:107 ^2    0/0 .>. 108:127 ^3    
+0/3f .>. 0:5 ^0    0/3 .>. 6:11 ^1    0/0 .>. 12:17 ^2    0/0 .>. 18:23 ^3    0/0 .>. 24:29 ^4    0/0 .>. 30:35 ^5    0/0 .>. 36:41 ^0    0/0 .>. 42:47 ^1    0/0 .>. 48:53 ^2    0/0 .>. 54:59 ^3    0/0 .>. 60:65 ^4    0/0 .>. 66:71 ^5    0/0 .>. 72:77 ^0    0/0 .>. 78:83 ^1    0/0 .>. 84:89 ^2    0/0 .>. 90:95 ^3    0/0 .>. 96:101 ^4    0/0 .>. 102:107 ^5    0/0 .>. 108:113 ^0    0/0 .>. 114:119 ^1    0/0 .>. 120:125 ^2    0/0 .>. 126:127 ^3
 
-This is once again split into "rcu" and "rcu_bh" portions.  The fields are
-as follows:
+This is once again split into "rcu_sched" and "rcu_bh" portions,
+and CONFIG_TREE_PREEMPT_RCU kernels will again have an additional
+"rcu_preempt" section.  The fields are as follows:
 
 o       "c" is exactly the same as "completed" under rcu/rcugp.
 
@@ -372,6 +201,11 @@ o	"fqlh" is the number of calls to force_quiescent_state() that
         exited immediately (without even being counted in nfqs above)
         due to contention on ->fqslock.
 
+o       "oqlen" is the number of callbacks on the "orphan" callback
+        list.  RCU callbacks are placed on this list by CPUs going
+        offline, and are "adopted" either by the CPU helping the outgoing
+        CPU or by the next rcu_barrier*() call, whichever comes first.
+
 o       Each element of the form "1/1 0:127 ^0" represents one struct
         rcu_node.  Each line represents one level of the hierarchy, from
         root to leaves.  It is best to think of the rcu_data structures
@@ -379,7 +213,7 @@ o	Each element of the form "1/1 0:127 ^0" represents one struct
         might be either one, two, or three levels of rcu_node structures,
         depending on the relationship between CONFIG_RCU_FANOUT and
         CONFIG_NR_CPUS.
-        
+
         o       The numbers separated by the "/" are the qsmask followed
                 by the qsmaskinit.  The qsmask will have one bit
                 set for each entity in the next lower level that
@@ -389,10 +223,19 @@ o	Each element of the form "1/1 0:127 ^0" represents one struct
                 The value of qsmaskinit is assigned to that of qsmask
                 at the beginning of each grace period.
 
-                For example, for "rcu", the qsmask of the first entry
-                of the lowest level is 0x14, meaning that we are still
-                waiting for CPUs 2 and 4 to check in for the current
-                grace period.
+                For example, for "rcu_sched", the qsmask of the first
+                entry of the lowest level is 0x14, meaning that we
+                are still waiting for CPUs 2 and 4 to check in for the
+                current grace period.
+
+        o       The characters separated by the ">" indicate the state
+                of the blocked-tasks lists.  A "T" preceding the ">"
+                indicates that at least one task blocked in an RCU
+                read-side critical section blocks the current grace
+                period, while a "." preceding the ">" indicates otherwise.
+                The character following the ">" indicates similarly for
+                the next grace period.  A "T" should appear in this
+                field only for rcu-preempt.
 
         o       The numbers separated by the ":" are the range of CPUs
                 served by this struct rcu_node.  This can be helpful
@@ -431,8 +274,9 @@ rcu_bh:
   6 np=120834 qsp=9902 cbr=0 cng=0 gpc=6 gps=3 nf=2 nn=110921
   7 np=144888 qsp=26336 cbr=0 cng=0 gpc=8 gps=2 nf=0 nn=118542
 
-As always, this is once again split into "rcu" and "rcu_bh" portions.
-The fields are as follows:
+As always, this is once again split into "rcu_sched" and "rcu_bh"
+portions, with CONFIG_TREE_PREEMPT_RCU kernels having an additional
+"rcu_preempt" section.  The fields are as follows:
 
 o       "np" is the number of times that __rcu_pending() has been invoked
         for the corresponding flavor of RCU.
diff --git a/Documentation/RCU/whatisRCU.txt b/Documentation/RCU/whatisRCU.txt
index e41a7fecf0d3..d542ca243b80 100644
--- a/Documentation/RCU/whatisRCU.txt
+++ b/Documentation/RCU/whatisRCU.txt
@@ -830,7 +830,7 @@ sched:	Critical sections	Grace period		Barrier
 SRCU:   Critical sections       Grace period            Barrier
 
         srcu_read_lock          synchronize_srcu        N/A
-        srcu_read_unlock
+        srcu_read_unlock        synchronize_srcu_expedited
 
 SRCU:   Initialization/cleanup
         init_srcu_struct
diff --git a/Documentation/dontdiff b/Documentation/dontdiff
index e1efc400bed6..e151b2a36267 100644
--- a/Documentation/dontdiff
+++ b/Documentation/dontdiff
@@ -65,6 +65,7 @@ aicdb.h*
 asm-offsets.h
 asm_offsets.h
 autoconf.h*
+av_permissions.h
 bbootsect
 bin2c
 binkernel.spec
@@ -95,12 +96,14 @@ docproc
 elf2ecoff
 elfconfig.h*
 fixdep
+flask.h
 fore200e_mkfirm
 fore200e_pca_fw.c*
 gconf
 gen-devlist
 gen_crc32table
 gen_init_cpio
+genheaders
 genksyms
 *_gray256.c
 ihex2fw
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 52c34b4f567e..d8ce217d1f72 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -85,7 +85,6 @@ parameter is applicable:
         PPT     Parallel port support is enabled.
         PS2     Appropriate PS/2 support is enabled.
         RAM     RAM disk support is enabled.
-        ROOTPLUG The example Root Plug LSM is enabled.
         S390    S390 architecture is enabled.
         SCSI    Appropriate SCSI support is enabled.
                         A lot of drivers has their options described inside of
@@ -779,6 +778,13 @@ and is between 256 and 4096 characters. It is defined in the file
                         by the set_ftrace_notrace file in the debugfs
                         tracing directory.
 
+        ftrace_graph_filter=[function-list]
+                        [FTRACE] Limit the top level callers functions traced
+                        by the function graph tracer at boot up.
+                        function-list is a comma separated list of functions
+                        that can be changed at run time by the
+                        set_graph_function file in the debugfs tracing directory.
+
         gamecon.map[2|3]=
                         [HW,JOY] Multisystem joystick and NES/SNES/PSX pad
                         support via parallel port (up to 5 devices per port)
@@ -2032,8 +2038,15 @@ and is between 256 and 4096 characters. It is defined in the file
 
         print-fatal-signals=
                         [KNL] debug: print fatal signals
-                        print-fatal-signals=1: print segfault info to
-                        the kernel console.
+
+                        If enabled, warn about various signal handling
+                        related application anomalies: too many signals,
+                        too many POSIX.1 timers, fatal signals causing a
+                        coredump - etc.
+
+                        If you hit the warning due to signal overflow,
+                        you might want to try "ulimit -i unlimited".
+
                         default: off.
 
         printk.time=    Show timing data prefixed to each printk message line
@@ -2164,15 +2177,6 @@ and is between 256 and 4096 characters. It is defined in the file
                         Useful for devices that are detected asynchronously
                         (e.g. USB and MMC devices).
 
-        root_plug.vendor_id=
-                        [ROOTPLUG] Override the default vendor ID
-
-        root_plug.product_id=
-                        [ROOTPLUG] Override the default product ID
-
-        root_plug.debug=
-                        [ROOTPLUG] Enable debugging output
-
         rw              [KNL] Mount root device read-write on boot
 
         S               [KNL] Run init in single mode
diff --git a/Documentation/pcmcia/driver-changes.txt b/Documentation/pcmcia/driver-changes.txt
index 059934363caf..446f43b309df 100644
--- a/Documentation/pcmcia/driver-changes.txt
+++ b/Documentation/pcmcia/driver-changes.txt
@@ -1,5 +1,17 @@
 This file details changes in 2.6 which affect PCMCIA card driver authors:
 
+* no cs_error / CS_CHECK / CONFIG_PCMCIA_DEBUG (as of 2.6.33)
+   Instead of the cs_error() callback or the CS_CHECK() macro, please use
+   Linux-style checking of return values, and -- if necessary -- debug
+   messages using "dev_dbg()" or "pr_debug()".
+
+* New CIS tuple access (as of 2.6.33)
+   Instead of pcmcia_get_{first,next}_tuple(), pcmcia_get_tuple_data() and
+   pcmcia_parse_tuple(), a driver shall use "pcmcia_get_tuple()" if it is
+   only interested in one (raw) tuple, or "pcmcia_loop_tuple()" if it is
+   interested in all tuples of one type. To decode the MAC from CISTPL_FUNCE,
+   a new helper "pcmcia_get_mac_from_cis()" was added.
+
 * New configuration loop helper (as of 2.6.28)
    By calling pcmcia_loop_config(), a driver can iterate over all available
    configuration options. During a driver's probe() phase, one doesn't need
diff --git a/Documentation/trace/ftrace-design.txt b/Documentation/trace/ftrace-design.txt
index 7003e10f10f5..641a1ef2a7ff 100644
--- a/Documentation/trace/ftrace-design.txt
+++ b/Documentation/trace/ftrace-design.txt
@@ -213,10 +213,19 @@ If you can't trace NMI functions, then skip this option.
 <details to be filled>
 
 
-HAVE_FTRACE_SYSCALLS
+HAVE_SYSCALL_TRACEPOINTS
 ---------------------
 
-<details to be filled>
+You need very few things to get the syscalls tracing in an arch.
+
+- Have a NR_syscalls variable in <asm/unistd.h> that provides the number
+  of syscalls supported by the arch.
+- Implement arch_syscall_addr() that resolves a syscall address from a
+  syscall number.
+- Support the TIF_SYSCALL_TRACEPOINT thread flags
+- Put the trace_sys_enter() and trace_sys_exit() tracepoints calls from ptrace
+  in the ptrace syscalls tracing path.
+- Tag this arch as HAVE_SYSCALL_TRACEPOINTS.
 
 
 HAVE_FTRACE_MCOUNT_RECORD