diff --git a/poky/bitbake/lib/bb/cache.py b/poky/bitbake/lib/bb/cache.py
index 36270d0..b8054e0 100644
--- a/poky/bitbake/lib/bb/cache.py
+++ b/poky/bitbake/lib/bb/cache.py
@@ -26,7 +26,7 @@
 
 logger = logging.getLogger("BitBake.Cache")
 
-__cache_version__ = "154"
+__cache_version__ = "153"
 
 def getCacheFile(path, filename, mc, data_hash):
     mcspec = ''
@@ -94,7 +94,6 @@
         if not self.packages:
             self.packages.append(self.pn)
         self.packages_dynamic = self.listvar('PACKAGES_DYNAMIC', metadata)
-        self.rprovides_pkg = self.pkgvar('RPROVIDES', self.packages, metadata)
 
         self.skipreason = self.getvar('__SKIPPED', metadata)
         if self.skipreason:
@@ -121,6 +120,7 @@
         self.depends          = self.depvar('DEPENDS', metadata)
         self.rdepends         = self.depvar('RDEPENDS', metadata)
         self.rrecommends      = self.depvar('RRECOMMENDS', metadata)
+        self.rprovides_pkg    = self.pkgvar('RPROVIDES', self.packages, metadata)
         self.rdepends_pkg     = self.pkgvar('RDEPENDS', self.packages, metadata)
         self.rrecommends_pkg  = self.pkgvar('RRECOMMENDS', self.packages, metadata)
         self.inherits         = self.getvar('__inherit_cache', metadata, expand=False)
diff --git a/poky/bitbake/lib/bb/cooker.py b/poky/bitbake/lib/bb/cooker.py
index 83cfee7..1f4cc1e 100644
--- a/poky/bitbake/lib/bb/cooker.py
+++ b/poky/bitbake/lib/bb/cooker.py
@@ -73,9 +73,7 @@
             self.pn = info.pn
             self.skipreason = info.skipreason
             self.provides = info.provides
-            self.rprovides = info.packages + info.rprovides
-            for package in info.packages:
-                self.rprovides += info.rprovides_pkg[package]
+            self.rprovides = info.rprovides
         elif reason:
             self.skipreason = reason
 
diff --git a/poky/bitbake/lib/bb/data_smart.py b/poky/bitbake/lib/bb/data_smart.py
index 2328c33..c559102 100644
--- a/poky/bitbake/lib/bb/data_smart.py
+++ b/poky/bitbake/lib/bb/data_smart.py
@@ -1005,7 +1005,7 @@
             else:
                 data.update({key:value})
 
-            varflags = d.getVarFlags(key, internalflags = True, expand=["vardepvalue"])
+            varflags = d.getVarFlags(key, internalflags = True)
             if not varflags:
                 continue
             for f in varflags:
diff --git a/poky/bitbake/lib/bb/fetch2/git.py b/poky/bitbake/lib/bb/fetch2/git.py
index df9538a..490d57f 100644
--- a/poky/bitbake/lib/bb/fetch2/git.py
+++ b/poky/bitbake/lib/bb/fetch2/git.py
@@ -220,12 +220,7 @@
             ud.shallow = False
 
         if ud.usehead:
-            # When usehead is set let's associate 'HEAD' with the unresolved
-            # rev of this repository. This will get resolved into a revision
-            # later. If an actual revision happens to have also been provided
-            # then this setting will be overridden.
-            for name in ud.names:
-                ud.unresolvedrev[name] = 'HEAD'
+            ud.unresolvedrev['default'] = 'HEAD'
 
         ud.basecmd = d.getVar("FETCHCMD_git") or "git -c core.fsyncobjectfiles=0"
 
diff --git a/poky/bitbake/lib/bb/tests/fetch.py b/poky/bitbake/lib/bb/tests/fetch.py
index 1452d76..da17d7f 100644
--- a/poky/bitbake/lib/bb/tests/fetch.py
+++ b/poky/bitbake/lib/bb/tests/fetch.py
@@ -654,58 +654,6 @@
         with self.assertRaises(bb.fetch2.UnpackError):
             self.fetchUnpack(['file://a;subdir=/bin/sh'])
 
-    def test_local_gitfetch_usehead(self):
-        # Create dummy local Git repo
-        src_dir = tempfile.mkdtemp(dir=self.tempdir,
-                                   prefix='gitfetch_localusehead_')
-        src_dir = os.path.abspath(src_dir)
-        bb.process.run("git init", cwd=src_dir)
-        bb.process.run("git commit --allow-empty -m'Dummy commit'",
-                       cwd=src_dir)
-        # Use other branch than master
-        bb.process.run("git checkout -b my-devel", cwd=src_dir)
-        bb.process.run("git commit --allow-empty -m'Dummy commit 2'",
-                       cwd=src_dir)
-        stdout = bb.process.run("git rev-parse HEAD", cwd=src_dir)
-        orig_rev = stdout[0].strip()
-
-        # Fetch and check revision
-        self.d.setVar("SRCREV", "AUTOINC")
-        url = "git://" + src_dir + ";protocol=file;usehead=1"
-        fetcher = bb.fetch.Fetch([url], self.d)
-        fetcher.download()
-        fetcher.unpack(self.unpackdir)
-        stdout = bb.process.run("git rev-parse HEAD",
-                                cwd=os.path.join(self.unpackdir, 'git'))
-        unpack_rev = stdout[0].strip()
-        self.assertEqual(orig_rev, unpack_rev)
-
-    def test_local_gitfetch_usehead_withname(self):
-        # Create dummy local Git repo
-        src_dir = tempfile.mkdtemp(dir=self.tempdir,
-                                   prefix='gitfetch_localusehead_')
-        src_dir = os.path.abspath(src_dir)
-        bb.process.run("git init", cwd=src_dir)
-        bb.process.run("git commit --allow-empty -m'Dummy commit'",
-                       cwd=src_dir)
-        # Use other branch than master
-        bb.process.run("git checkout -b my-devel", cwd=src_dir)
-        bb.process.run("git commit --allow-empty -m'Dummy commit 2'",
-                       cwd=src_dir)
-        stdout = bb.process.run("git rev-parse HEAD", cwd=src_dir)
-        orig_rev = stdout[0].strip()
-
-        # Fetch and check revision
-        self.d.setVar("SRCREV", "AUTOINC")
-        url = "git://" + src_dir + ";protocol=file;usehead=1;name=newName"
-        fetcher = bb.fetch.Fetch([url], self.d)
-        fetcher.download()
-        fetcher.unpack(self.unpackdir)
-        stdout = bb.process.run("git rev-parse HEAD",
-                                cwd=os.path.join(self.unpackdir, 'git'))
-        unpack_rev = stdout[0].strip()
-        self.assertEqual(orig_rev, unpack_rev)
-
 class FetcherNoNetworkTest(FetcherTest):
     def setUp(self):
         super().setUp()
@@ -896,21 +844,35 @@
         self.assertRaises(bb.fetch.FetchError, self.gitfetcher, url1, url2)
 
     @skipIfNoNetwork()
-    def test_gitfetch_usehead(self):
-        # Since self.gitfetcher() sets SRCREV we expect this to override
-        # `usehead=1' and instead fetch the specified SRCREV. See
-        # test_local_gitfetch_usehead() for a positive use of the usehead
-        # feature.
-        url = "git://git.openembedded.org/bitbake;usehead=1"
-        self.assertRaises(bb.fetch.ParameterError, self.gitfetcher, url, url)
+    def test_gitfetch_localusehead(self):
+        # Create dummy local Git repo
+        src_dir = tempfile.mkdtemp(dir=self.tempdir,
+                                   prefix='gitfetch_localusehead_')
+        src_dir = os.path.abspath(src_dir)
+        bb.process.run("git init", cwd=src_dir)
+        bb.process.run("git commit --allow-empty -m'Dummy commit'",
+                       cwd=src_dir)
+        # Use other branch than master
+        bb.process.run("git checkout -b my-devel", cwd=src_dir)
+        bb.process.run("git commit --allow-empty -m'Dummy commit 2'",
+                       cwd=src_dir)
+        stdout = bb.process.run("git rev-parse HEAD", cwd=src_dir)
+        orig_rev = stdout[0].strip()
+
+        # Fetch and check revision
+        self.d.setVar("SRCREV", "AUTOINC")
+        url = "git://" + src_dir + ";protocol=file;usehead=1"
+        fetcher = bb.fetch.Fetch([url], self.d)
+        fetcher.download()
+        fetcher.unpack(self.unpackdir)
+        stdout = bb.process.run("git rev-parse HEAD",
+                                cwd=os.path.join(self.unpackdir, 'git'))
+        unpack_rev = stdout[0].strip()
+        self.assertEqual(orig_rev, unpack_rev)
 
     @skipIfNoNetwork()
-    def test_gitfetch_usehead_withname(self):
-        # Since self.gitfetcher() sets SRCREV we expect this to override
-        # `usehead=1' and instead fetch the specified SRCREV. See
-        # test_local_gitfetch_usehead() for a positive use of the usehead
-        # feature.
-        url = "git://git.openembedded.org/bitbake;usehead=1;name=newName"
+    def test_gitfetch_remoteusehead(self):
+        url = "git://git.openembedded.org/bitbake;usehead=1"
         self.assertRaises(bb.fetch.ParameterError, self.gitfetcher, url, url)
 
     @skipIfNoNetwork()
diff --git a/poky/bitbake/lib/bb/utils.py b/poky/bitbake/lib/bb/utils.py
index 5c775bd..f73d31f 100644
--- a/poky/bitbake/lib/bb/utils.py
+++ b/poky/bitbake/lib/bb/utils.py
@@ -129,7 +129,6 @@
     return r
 
 def vercmp_string(a, b):
-    """ Split version strings and compare them """
     ta = split_version(a)
     tb = split_version(b)
     return vercmp(ta, tb)
@@ -248,12 +247,6 @@
     return r
 
 def explode_dep_versions(s):
-    """
-    Take an RDEPENDS style string of format:
-    "DEPEND1 (optional version) DEPEND2 (optional version) ..."
-    skip null value and items appeared in dependancy string multiple times
-    and return a dictionary of dependencies and versions.
-    """
     r = explode_dep_versions2(s)
     for d in r:
         if not r[d]:
@@ -699,7 +692,7 @@
                 raise
 
 def prunedir(topdir, ionice=False):
-    """ Delete everything reachable from the directory named in 'topdir'. """
+    # Delete everything reachable from the directory named in 'topdir'.
     # CAUTION:  This is dangerous!
     if _check_unsafe_delete_path(topdir):
         raise Exception('bb.utils.prunedir: called with dangerous path "%s", refusing to delete!' % topdir)
@@ -710,10 +703,8 @@
 # but thats possibly insane and suffixes is probably going to be small
 #
 def prune_suffix(var, suffixes, d):
-    """ 
-    See if var ends with any of the suffixes listed and
-    remove it if found 
-    """
+    # See if var ends with any of the suffixes listed and
+    # remove it if found
     for suffix in suffixes:
         if suffix and var.endswith(suffix):
             return var[:-len(suffix)]
@@ -965,10 +956,6 @@
         os.umask(current_mask)
 
 def to_boolean(string, default=None):
-    """ 
-    Check input string and return boolean value True/False/None
-    depending upon the checks 
-    """
     if not string:
         return default
 
@@ -1012,23 +999,6 @@
     return falsevalue
 
 def contains_any(variable, checkvalues, truevalue, falsevalue, d):
-    """Check if a variable contains any values specified.
-
-    Arguments:
-
-    variable -- the variable name. This will be fetched and expanded (using
-    d.getVar(variable)) and then split into a set().
-
-    checkvalues -- if this is a string it is split on whitespace into a set(),
-    otherwise coerced directly into a set().
-
-    truevalue -- the value to return if checkvalues is a subset of variable.
-
-    falsevalue -- the value to return if variable is empty or if checkvalues is
-    not a subset of variable.
-
-    d -- the data store.
-    """
     val = d.getVar(variable)
     if not val:
         return falsevalue
@@ -1590,8 +1560,8 @@
     except:
         pass
 
+# export common proxies variables from datastore to environment
 def export_proxies(d):
-    """ export common proxies variables from datastore to environment """
     import os
 
     variables = ['http_proxy', 'HTTP_PROXY', 'https_proxy', 'HTTPS_PROXY',