diff --git a/sumpy/e2e.py b/sumpy/e2e.py
index 724903fd587e45a03a65f5bbd750b85b20615bba..12e80b5f5d79781ab7ff78bcad8954e3e6ef3271 100644
--- a/sumpy/e2e.py
+++ b/sumpy/e2e.py
@@ -196,7 +196,7 @@ class E2EFromCSR(E2EBase):
                     """] + ["""
                     tgt_expansions[tgt_ibox - tgt_base_ibox, {coeffidx}] = \
                             simul_reduce(sum, isrc_box, coeff{coeffidx}) \
-                            {{id_prefix=write_expn,nosync=write_expn*}}
+                            {{id_prefix=write_expn}}
                     """.format(coeffidx=i) for i in range(ncoeff_tgt)] + ["""
                 end
                 """],
@@ -220,7 +220,8 @@ class E2EFromCSR(E2EBase):
                 silenced_warnings="write_race(write_expn*)",
                 default_offset=lp.auto,
                 fixed_parameters=dict(dim=self.dim),
-                lang_version=MOST_RECENT_LANGUAGE_VERSION)
+                lang_version=MOST_RECENT_LANGUAGE_VERSION
+                )
 
         for expn in [self.src_expansion, self.tgt_expansion]:
             loopy_knl = expn.prepare_loopy_kernel(loopy_knl)
@@ -314,7 +315,7 @@ class E2EFromChildren(E2EBase):
                                 tgt_expansions[tgt_ibox - tgt_base_ibox, {i}] \
                                 + coeff{i} \
                                 {{id_prefix=write_expn,dep=compute_coeff*,
-                                    nosync=read_coeff*:write_expn*}}
+                                    nosync=read_coeff*}}
                             """.format(i=i) for i in range(ncoeffs)] + ["""
                         end
                     end
@@ -422,7 +423,7 @@ class E2EFromParent(E2EBase):
 
                     tgt_expansions[tgt_ibox - tgt_base_ibox, {i}] = \
                         tgt_expansions[tgt_ibox - tgt_base_ibox, {i}] + coeff{i} \
-                        {{id_prefix=write_expn,nosync=read_expn*:write_expn*}}
+                        {{id_prefix=write_expn,nosync=read_expn*}}
                     """.format(i=i) for i in range(ncoeffs)] + ["""
                 end
                 """],
diff --git a/sumpy/p2e.py b/sumpy/p2e.py
index ba60c38cac3d20b9cb438c5c4272bfcef7e50358..e9037a3f55396d57103a06970de3a1418adf00f3 100644
--- a/sumpy/p2e.py
+++ b/sumpy/p2e.py
@@ -137,7 +137,7 @@ class P2EFromSingleBox(P2EBase):
                     """] + ["""
                     tgt_expansions[src_ibox-tgt_base_ibox, {coeffidx}] = \
                             simul_reduce(sum, isrc, strength*coeff{coeffidx}) \
-                            {{id_prefix=write_expn,nosync=write_expn*}}
+                            {{id_prefix=write_expn}}
                     """.format(coeffidx=i) for i in range(ncoeffs)] + ["""
                 end
                 """],
@@ -256,7 +256,7 @@ class P2EFromCSR(P2EBase):
                     tgt_expansions[tgt_ibox - tgt_base_ibox, {coeffidx}] = \
                             simul_reduce(sum, (isrc_box, isrc),
                                 strength*coeff{coeffidx}) \
-                            {{id_prefix=write_expn,nosync=write_expn*}}
+                            {{id_prefix=write_expn}}
                     """.format(coeffidx=i) for i in range(ncoeffs)] + ["""
                 end
                 """],
diff --git a/sumpy/version.py b/sumpy/version.py
index 178a9771bc2f20ad06b4679f3076d5a03b3dd782..98f05a2db719067b04cb7b36457b24c84b4ddddf 100644
--- a/sumpy/version.py
+++ b/sumpy/version.py
@@ -25,4 +25,8 @@ VERSION = (2016, 1)
 VERSION_STATUS = "beta1"
 VERSION_TEXT = ".".join(str(x) for x in VERSION) + VERSION_STATUS
 
-KERNEL_VERSION = 26
+# When developing on a branch, set the first element of this tuple to your
+# branch name, so as to avoid conflicts with the master branch. Make sure
+# to reset this to the next number up with "master" before merging into
+# master.
+KERNEL_VERSION = ("master", 28)