diff --git a/scripts/build-all.py b/scripts/build-all.py
new file mode 100755
index 0000000..0f8babf
--- /dev/null
+++ b/scripts/build-all.py
@@ -0,0 +1,428 @@
+#! /usr/bin/env python2
+
+# Copyright (c) 2009-2015, The Linux Foundation. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in the
+#       documentation and/or other materials provided with the distribution.
+#     * Neither the name of The Linux Foundation nor
+#       the names of its contributors may be used to endorse or promote
+#       products derived from this software without specific prior written
+#       permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Build the kernel for all targets using the Android build environment.
+
+from collections import namedtuple
+import glob
+from optparse import OptionParser
+import os
+import re
+import shutil
+import subprocess
+import sys
+import threading
+import Queue
+
+version = 'build-all.py, version 1.99'
+
+build_dir = '../all-kernels'
+make_command = ["vmlinux", "modules", "dtbs"]
+all_options = {}
+compile64 = os.environ.get('CROSS_COMPILE64')
+
+def error(msg):
+    sys.stderr.write("error: %s\n" % msg)
+
+def fail(msg):
+    """Fail with a user-printed message"""
+    error(msg)
+    sys.exit(1)
+
+if not os.environ.get('CROSS_COMPILE'):
+    fail("CROSS_COMPILE must be set in the environment")
+
+def check_kernel():
+    """Ensure that PWD is a kernel directory"""
+    have_defconfig = any([
+        os.path.isfile('arch/arm64/configs/msm_defconfig'),
+        os.path.isfile('arch/arm64/configs/msmskunk_defconfig')])
+
+    if not all([os.path.isfile('MAINTAINERS'), have_defconfig]):
+        fail("This doesn't seem to be an MSM kernel dir")
+
+def check_build():
+    """Ensure that the build directory is present."""
+    if not os.path.isdir(build_dir):
+        try:
+            os.makedirs(build_dir)
+        except OSError as exc:
+            if exc.errno == errno.EEXIST:
+                pass
+            else:
+                raise
+
+failed_targets = []
+
+BuildResult = namedtuple('BuildResult', ['status', 'messages'])
+
+class BuildSequence(namedtuple('BuildSequence', ['log_name', 'short_name', 'steps'])):
+
+    def set_width(self, width):
+        self.width = width
+
+    def __enter__(self):
+        self.log = open(self.log_name, 'w')
+    def __exit__(self, type, value, traceback):
+        self.log.close()
+
+    def run(self):
+        self.status = None
+        messages = ["Building: " + self.short_name]
+        def printer(line):
+            text = "[%-*s] %s" % (self.width, self.short_name, line)
+            messages.append(text)
+            self.log.write(text)
+            self.log.write('\n')
+        for step in self.steps:
+            st = step.run(printer)
+            if st:
+                self.status = BuildResult(self.short_name, messages)
+                break
+        if not self.status:
+            self.status = BuildResult(None, messages)
+
+class BuildTracker:
+    """Manages all of the steps necessary to perform a build.  The
+    build consists of one or more sequences of steps.  The different
+    sequences can be processed independently, while the steps within a
+    sequence must be done in order."""
+
+    def __init__(self, parallel_builds):
+        self.sequence = []
+        self.lock = threading.Lock()
+        self.parallel_builds = parallel_builds
+
+    def add_sequence(self, log_name, short_name, steps):
+        self.sequence.append(BuildSequence(log_name, short_name, steps))
+
+    def longest_name(self):
+        longest = 0
+        for seq in self.sequence:
+            longest = max(longest, len(seq.short_name))
+        return longest
+
+    def __repr__(self):
+        return "BuildTracker(%s)" % self.sequence
+
+    def run_child(self, seq):
+        seq.set_width(self.longest)
+        tok = self.build_tokens.get()
+        with self.lock:
+            print "Building:", seq.short_name
+        with seq:
+            seq.run()
+            self.results.put(seq.status)
+        self.build_tokens.put(tok)
+
+    def run(self):
+        self.longest = self.longest_name()
+        self.results = Queue.Queue()
+        children = []
+        errors = []
+        self.build_tokens = Queue.Queue()
+        nthreads = self.parallel_builds
+        print "Building with", nthreads, "threads"
+        for i in range(nthreads):
+            self.build_tokens.put(True)
+        for seq in self.sequence:
+            child = threading.Thread(target=self.run_child, args=[seq])
+            children.append(child)
+            child.start()
+        for child in children:
+            stats = self.results.get()
+            if all_options.verbose:
+                with self.lock:
+                    for line in stats.messages:
+                        print line
+                    sys.stdout.flush()
+            if stats.status:
+                errors.append(stats.status)
+        for child in children:
+            child.join()
+        if errors:
+            fail("\n  ".join(["Failed targets:"] + errors))
+
+class PrintStep:
+    """A step that just prints a message"""
+    def __init__(self, message):
+        self.message = message
+
+    def run(self, outp):
+        outp(self.message)
+
+class MkdirStep:
+    """A step that makes a directory"""
+    def __init__(self, direc):
+        self.direc = direc
+
+    def run(self, outp):
+        outp("mkdir %s" % self.direc)
+        os.mkdir(self.direc)
+
+class RmtreeStep:
+    def __init__(self, direc):
+        self.direc = direc
+
+    def run(self, outp):
+        outp("rmtree %s" % self.direc)
+        shutil.rmtree(self.direc, ignore_errors=True)
+
+class CopyfileStep:
+    def __init__(self, src, dest):
+        self.src = src
+        self.dest = dest
+
+    def run(self, outp):
+        outp("cp %s %s" % (self.src, self.dest))
+        shutil.copyfile(self.src, self.dest)
+
+class ExecStep:
+    def __init__(self, cmd, **kwargs):
+        self.cmd = cmd
+        self.kwargs = kwargs
+
+    def run(self, outp):
+        outp("exec: %s" % (" ".join(self.cmd),))
+        with open('/dev/null', 'r') as devnull:
+            proc = subprocess.Popen(self.cmd, stdin=devnull,
+                    stdout=subprocess.PIPE,
+                    stderr=subprocess.STDOUT,
+                    **self.kwargs)
+            stdout = proc.stdout
+            while True:
+                line = stdout.readline()
+                if not line:
+                    break
+                line = line.rstrip('\n')
+                outp(line)
+            result = proc.wait()
+            if result != 0:
+                return ('error', result)
+            else:
+                return None
+
+class Builder():
+
+    def __init__(self, name, defconfig):
+        self.name = name
+        self.defconfig = defconfig
+
+        self.confname = self.defconfig.split('/')[-1]
+
+        # Determine if this is a 64-bit target based on the location
+        # of the defconfig.
+        self.make_env = os.environ.copy()
+        if "/arm64/" in defconfig:
+            if compile64:
+                self.make_env['CROSS_COMPILE'] = compile64
+            else:
+                fail("Attempting to build 64-bit, without setting CROSS_COMPILE64")
+            self.make_env['ARCH'] = 'arm64'
+        else:
+            self.make_env['ARCH'] = 'arm'
+        self.make_env['KCONFIG_NOTIMESTAMP'] = 'true'
+        self.log_name = "%s/log-%s.log" % (build_dir, self.name)
+
+    def build(self):
+        steps = []
+        dest_dir = os.path.join(build_dir, self.name)
+        log_name = "%s/log-%s.log" % (build_dir, self.name)
+        steps.append(PrintStep('Building %s in %s log %s' %
+            (self.name, dest_dir, log_name)))
+        if not os.path.isdir(dest_dir):
+            steps.append(MkdirStep(dest_dir))
+        defconfig = self.defconfig
+        dotconfig = '%s/.config' % dest_dir
+        savedefconfig = '%s/defconfig' % dest_dir
+
+        staging_dir = 'install_staging'
+        modi_dir = '%s' % staging_dir
+        hdri_dir = '%s/usr' % staging_dir
+        steps.append(RmtreeStep(os.path.join(dest_dir, staging_dir)))
+
+        steps.append(ExecStep(['make', 'O=%s' % dest_dir,
+            self.confname], env=self.make_env))
+
+        if not all_options.updateconfigs:
+            # Build targets can be dependent upon the completion of
+            # previous build targets, so build them one at a time.
+            cmd_line = ['make',
+                'INSTALL_HDR_PATH=%s' % hdri_dir,
+                'INSTALL_MOD_PATH=%s' % modi_dir,
+                'O=%s' % dest_dir]
+            build_targets = []
+            for c in make_command:
+                if re.match(r'^-{1,2}\w', c):
+                    cmd_line.append(c)
+                else:
+                    build_targets.append(c)
+            for t in build_targets:
+                steps.append(ExecStep(cmd_line + [t], env=self.make_env))
+
+        # Copy the defconfig back.
+        if all_options.configs or all_options.updateconfigs:
+            steps.append(ExecStep(['make', 'O=%s' % dest_dir,
+                'savedefconfig'], env=self.make_env))
+            steps.append(CopyfileStep(savedefconfig, defconfig))
+
+        return steps
+
+def update_config(file, str):
+    print 'Updating %s with \'%s\'\n' % (file, str)
+    with open(file, 'a') as defconfig:
+        defconfig.write(str + '\n')
+
+def scan_configs():
+    """Get the full list of defconfigs appropriate for this tree."""
+    names = []
+    arch_pats = (
+        r'[fm]sm[0-9]*_defconfig',
+        r'apq*_defconfig',
+        r'qsd*_defconfig',
+	r'mpq*_defconfig',
+        )
+    arch64_pats = (
+	r'msm*_defconfig',
+        )
+    for p in arch_pats:
+        for n in glob.glob('arch/arm/configs/' + p):
+            name = os.path.basename(n)[:-10]
+            names.append(Builder(name, n))
+    if 'CROSS_COMPILE64' in os.environ:
+        for p in arch64_pats:
+            for n in glob.glob('arch/arm64/configs/' + p):
+                name = os.path.basename(n)[:-10] + "-64"
+                names.append(Builder(name, n))
+    return names
+
+def build_many(targets):
+    print "Building %d target(s)" % len(targets)
+
+    # To try and make up for the link phase being serial, try to do
+    # two full builds in parallel.  Don't do too many because lots of
+    # parallel builds tends to use up available memory rather quickly.
+    parallel = 2
+    if all_options.jobs and all_options.jobs > 1:
+        j = max(all_options.jobs / parallel, 2)
+        make_command.append("-j" + str(j))
+
+    tracker = BuildTracker(parallel)
+    for target in targets:
+        if all_options.updateconfigs:
+            update_config(target.defconfig, all_options.updateconfigs)
+        steps = target.build()
+        tracker.add_sequence(target.log_name, target.name, steps)
+    tracker.run()
+
+def main():
+    global make_command
+
+    check_kernel()
+    check_build()
+
+    configs = scan_configs()
+
+    usage = ("""
+           %prog [options] all                 -- Build all targets
+           %prog [options] target target ...   -- List specific targets
+           %prog [options] perf                -- Build all perf targets
+           %prog [options] noperf              -- Build all non-perf targets""")
+    parser = OptionParser(usage=usage, version=version)
+    parser.add_option('--configs', action='store_true',
+            dest='configs',
+            help="Copy configs back into tree")
+    parser.add_option('--list', action='store_true',
+            dest='list',
+            help='List available targets')
+    parser.add_option('-v', '--verbose', action='store_true',
+            dest='verbose',
+            help='Output to stdout in addition to log file')
+    parser.add_option('--oldconfig', action='store_true',
+            dest='oldconfig',
+            help='Only process "make oldconfig"')
+    parser.add_option('--updateconfigs',
+            dest='updateconfigs',
+            help="Update defconfigs with provided option setting, "
+                 "e.g. --updateconfigs=\'CONFIG_USE_THING=y\'")
+    parser.add_option('-j', '--jobs', type='int', dest="jobs",
+            help="Number of simultaneous jobs")
+    parser.add_option('-l', '--load-average', type='int',
+            dest='load_average',
+            help="Don't start multiple jobs unless load is below LOAD_AVERAGE")
+    parser.add_option('-k', '--keep-going', action='store_true',
+            dest='keep_going', default=False,
+            help="Keep building other targets if a target fails")
+    parser.add_option('-m', '--make-target', action='append',
+            help='Build the indicated make target (default: %s)' %
+                 ' '.join(make_command))
+
+    (options, args) = parser.parse_args()
+    global all_options
+    all_options = options
+
+    if options.list:
+        print "Available targets:"
+        for target in configs:
+            print "   %s" % target.name
+        sys.exit(0)
+
+    if options.oldconfig:
+        make_command = ["oldconfig"]
+    elif options.make_target:
+        make_command = options.make_target
+
+    if args == ['all']:
+        build_many(configs)
+    elif args == ['perf']:
+        targets = []
+        for t in configs:
+            if "perf" in t.name:
+                targets.append(t)
+        build_many(targets)
+    elif args == ['noperf']:
+        targets = []
+        for t in configs:
+            if "perf" not in t.name:
+                targets.append(t)
+        build_many(targets)
+    elif len(args) > 0:
+        all_configs = {}
+        for t in configs:
+            all_configs[t.name] = t
+        targets = []
+        for t in args:
+            if t not in all_configs:
+                parser.error("Target '%s' not one of %s" % (t, all_configs.keys()))
+            targets.append(all_configs[t])
+        build_many(targets)
+    else:
+        parser.error("Must specify a target to build, or 'all'")
+
+if __name__ == "__main__":
+    main()