Merge branch 'akpm' (patches from Andrew)

Merge third patchbomb from Andrew Morton:

 - the rest of MM

 - scripts/gdb updates

 - ipc/ updates

 - lib/ updates

 - MAINTAINERS updates

 - various other misc things

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (67 commits)
  genalloc: rename of_get_named_gen_pool() to of_gen_pool_get()
  genalloc: rename dev_get_gen_pool() to gen_pool_get()
  x86: opt into HAVE_COPY_THREAD_TLS, for both 32-bit and 64-bit
  MAINTAINERS: add zpool
  MAINTAINERS: BCACHE: Kent Overstreet has changed email address
  MAINTAINERS: move Jens Osterkamp to CREDITS
  MAINTAINERS: remove unused nbd.h pattern
  MAINTAINERS: update brcm gpio filename pattern
  MAINTAINERS: update brcm dts pattern
  MAINTAINERS: update sound soc intel patterns
  MAINTAINERS: remove website for paride
  MAINTAINERS: update Emulex ocrdma email addresses
  bcache: use kvfree() in various places
  libcxgbi: use kvfree() in cxgbi_free_big_mem()
  target: use kvfree() in session alloc and free
  IB/ehca: use kvfree() in ipz_queue_{cd}tor()
  drm/nouveau/gem: use kvfree() in u_free()
  drm: use kvfree() in drm_free_large()
  cxgb4: use kvfree() in t4_free_mem()
  cxgb3: use kvfree() in cxgb_free_mem()
  ...

scripts/gdb/linux/dmesg.py

@@ -12,7 +12,6 @@
 #
 
 import gdb
-import string
 
 from linux import utils
 

scripts/gdb/linux/lists.py

@@ -0,0 +1,92 @@
+#
+# gdb helper commands and functions for Linux kernel debugging
+#
+#  list tools
+#
+# Copyright (c) Thiebaud Weksteen, 2015
+#
+# Authors:
+#  Thiebaud Weksteen <thiebaud@weksteen.fr>
+#
+# This work is licensed under the terms of the GNU GPL version 2.
+#
+
+import gdb
+
+from linux import utils
+
+list_head = utils.CachedType("struct list_head")
+
+
+def list_check(head):
+    nb = 0
+    if (head.type == list_head.get_type().pointer()):
+        head = head.dereference()
+    elif (head.type != list_head.get_type()):
+        raise gdb.GdbError('argument must be of type (struct list_head [*])')
+    c = head
+    try:
+        gdb.write("Starting with: {}\n".format(c))
+    except gdb.MemoryError:
+        gdb.write('head is not accessible\n')
+        return
+    while True:
+        p = c['prev'].dereference()
+        n = c['next'].dereference()
+        try:
+            if p['next'] != c.address:
+                gdb.write('prev.next != current: '
+                          'current@{current_addr}={current} '
+                          'prev@{p_addr}={p}\n'.format(
+                              current_addr=c.address,
+                              current=c,
+                              p_addr=p.address,
+                              p=p,
+                          ))
+                return
+        except gdb.MemoryError:
+            gdb.write('prev is not accessible: '
+                      'current@{current_addr}={current}\n'.format(
+                          current_addr=c.address,
+                          current=c
+                      ))
+            return
+        try:
+            if n['prev'] != c.address:
+                gdb.write('next.prev != current: '
+                          'current@{current_addr}={current} '
+                          'next@{n_addr}={n}\n'.format(
+                              current_addr=c.address,
+                              current=c,
+                              n_addr=n.address,
+                              n=n,
+                          ))
+                return
+        except gdb.MemoryError:
+            gdb.write('next is not accessible: '
+                      'current@{current_addr}={current}\n'.format(
+                          current_addr=c.address,
+                          current=c
+                      ))
+            return
+        c = n
+        nb += 1
+        if c == head:
+            gdb.write("list is consistent: {} node(s)\n".format(nb))
+            return
+
+
+class LxListChk(gdb.Command):
+    """Verify a list consistency"""
+
+    def __init__(self):
+        super(LxListChk, self).__init__("lx-list-check", gdb.COMMAND_DATA,
+                                        gdb.COMPLETE_EXPRESSION)
+
+    def invoke(self, arg, from_tty):
+        argv = gdb.string_to_argv(arg)
+        if len(argv) != 1:
+            raise gdb.GdbError("lx-list-check takes one argument")
+        list_check(gdb.parse_and_eval(argv[0]))
+
+LxListChk()

scripts/gdb/linux/symbols.py

@@ -14,9 +14,8 @@
 import gdb
 import os
 import re
-import string
 
-from linux import modules, utils
+from linux import modules
 
 
 if hasattr(gdb, 'Breakpoint'):
@@ -97,7 +96,7 @@ lx-symbols command."""
             return ""
         attrs = sect_attrs['attrs']
         section_name_to_address = {
-            attrs[n]['name'].string() : attrs[n]['address']
+            attrs[n]['name'].string(): attrs[n]['address']
             for n in range(int(sect_attrs['nsections']))}
         args = []
         for section_name in [".data", ".data..read_mostly", ".rodata", ".bss"]:
@@ -124,7 +123,7 @@ lx-symbols command."""
                 addr=module_addr,
                 sections=self._section_arguments(module))
             gdb.execute(cmdline, to_string=True)
-            if not module_name in self.loaded_modules:
+            if module_name not in self.loaded_modules:
                 self.loaded_modules.append(module_name)
         else:
             gdb.write("no module object found for '{0}'\n".format(module_name))
@@ -164,7 +163,7 @@ lx-symbols command."""
         self.load_all_symbols()
 
         if hasattr(gdb, 'Breakpoint'):
-            if not self.breakpoint is None:
+            if self.breakpoint is not None:
                 self.breakpoint.delete()
                 self.breakpoint = None
             self.breakpoint = LoadModuleBreakpoint(

scripts/gdb/linux/tasks.py

@@ -18,8 +18,8 @@ from linux import utils
 
 task_type = utils.CachedType("struct task_struct")
 
+
 def task_lists():
-    global task_type
     task_ptr_type = task_type.get_type().pointer()
     init_task = gdb.parse_and_eval("init_task").address
     t = g = init_task
@@ -38,6 +38,7 @@ def task_lists():
         if t == init_task:
             return
 
+
 def get_task_by_pid(pid):
     for task in task_lists():
         if int(task['pid']) == pid:
@@ -65,13 +66,28 @@ return that task_struct variable which PID matches."""
 LxTaskByPidFunc()
 
 
+class LxPs(gdb.Command):
+    """Dump Linux tasks."""
+
+    def __init__(self):
+        super(LxPs, self).__init__("lx-ps", gdb.COMMAND_DATA)
+
+    def invoke(self, arg, from_tty):
+        for task in task_lists():
+            gdb.write("{address} {pid} {comm}\n".format(
+                address=task,
+                pid=task["pid"],
+                comm=task["comm"].string()))
+
+LxPs()
+
+
 thread_info_type = utils.CachedType("struct thread_info")
 
 ia64_task_size = None
 
 
 def get_thread_info(task):
-    global thread_info_type
     thread_info_ptr_type = thread_info_type.get_type().pointer()
     if utils.is_target_arch("ia64"):
         global ia64_task_size

scripts/gdb/linux/utils.py

@@ -83,7 +83,7 @@ def get_target_endianness():
         elif "big endian" in endian:
             target_endianness = BIG_ENDIAN
         else:
-            raise gdb.GdgError("unknown endianness '{0}'".format(str(endian)))
+            raise gdb.GdbError("unknown endianness '{0}'".format(str(endian)))
     return target_endianness
 
 
@@ -151,6 +151,6 @@ def get_gdbserver_type():
             gdbserver_type = GDBSERVER_QEMU
         elif probe_kgdb():
             gdbserver_type = GDBSERVER_KGDB
-        if not gdbserver_type is None and hasattr(gdb, 'events'):
+        if gdbserver_type is not None and hasattr(gdb, 'events'):
             gdb.events.exited.connect(exit_handler)
     return gdbserver_type

scripts/gdb/vmlinux-gdb.py

@@ -28,3 +28,4 @@ else:
     import linux.dmesg
     import linux.tasks
     import linux.cpus
+    import linux.lists