diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index af7104aaffd92f1eb3db02df44ffc33e7df78adc..a626465dd877ebb13e0114abae9dee7c3e3de2b1 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -713,9 +713,6 @@
 			It will be ignored when crashkernel=X,high is not used
 			or memory reserved is below 4G.
 
-	crossrelease_fullstack
-			[KNL] Allow to record full stack trace in cross-release
-
 	cryptomgr.notests
                         [KNL] Disable crypto self-tests
 
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d4fc98c50378c40bc901f6446d2bfff68151eb6a..ff4e9cd998544c00db08b44f8dd0ee91b7a1ad58 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -55,7 +55,6 @@ config X86
 	select ARCH_HAS_GCOV_PROFILE_ALL
 	select ARCH_HAS_KCOV			if X86_64
 	select ARCH_HAS_PMEM_API		if X86_64
-	# Causing hangs/crashes, see the commit that added this change for details.
 	select ARCH_HAS_REFCOUNT
 	select ARCH_HAS_UACCESS_FLUSHCACHE	if X86_64
 	select ARCH_HAS_SET_MEMORY
diff --git a/include/linux/completion.h b/include/linux/completion.h
index 94a59ba7d422f4d3b4a53314d99fa4a1367fbcc4..519e94915d1850628ba3a79f7341c29ce3a68f40 100644
--- a/include/linux/completion.h
+++ b/include/linux/completion.h
@@ -32,7 +32,6 @@ struct completion {
 #define init_completion(x) __init_completion(x)
 static inline void complete_acquire(struct completion *x) {}
 static inline void complete_release(struct completion *x) {}
-static inline void complete_release_commit(struct completion *x) {}
 
 #define COMPLETION_INITIALIZER(work) \
 	{ 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) }
diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h
index 46cb57d5eb1361e521f36208f0fef6b31fd071ea..1b3996ff3f16d10158056e45425b81b5e7c5cbd8 100644
--- a/include/linux/irqflags.h
+++ b/include/linux/irqflags.h
@@ -27,22 +27,18 @@
 # define trace_hardirq_enter()			\
 do {						\
 	current->hardirq_context++;		\
-	crossrelease_hist_start(XHLOCK_HARD);	\
 } while (0)
 # define trace_hardirq_exit()			\
 do {						\
 	current->hardirq_context--;		\
-	crossrelease_hist_end(XHLOCK_HARD);	\
 } while (0)
 # define lockdep_softirq_enter()		\
 do {						\
 	current->softirq_context++;		\
-	crossrelease_hist_start(XHLOCK_SOFT);	\
 } while (0)
 # define lockdep_softirq_exit()			\
 do {						\
 	current->softirq_context--;		\
-	crossrelease_hist_end(XHLOCK_SOFT);	\
 } while (0)
 # define INIT_TRACE_IRQFLAGS	.softirqs_enabled = 1,
 #else
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 2e75dc34bff5cd3e468571918329793eaf7a0911..3251d9c0d3137ee594a8727f4f817bdb2e2d2350 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -475,8 +475,6 @@ enum xhlock_context_t {
 #define STATIC_LOCKDEP_MAP_INIT(_name, _key) \
 	{ .name = (_name), .key = (void *)(_key), }
 
-static inline void crossrelease_hist_start(enum xhlock_context_t c) {}
-static inline void crossrelease_hist_end(enum xhlock_context_t c) {}
 static inline void lockdep_invariant_state(bool force) {}
 static inline void lockdep_init_task(struct task_struct *task) {}
 static inline void lockdep_free_task(struct task_struct *task) {}
diff --git a/kernel/sched/completion.c b/kernel/sched/completion.c
index 2ddaec40956f7cf1356e17404e758b9a11924c8d..0926aef10dadc26d73959b5d7a736e247320a7de 100644
--- a/kernel/sched/completion.c
+++ b/kernel/sched/completion.c
@@ -34,11 +34,6 @@ void complete(struct completion *x)
 
 	spin_lock_irqsave(&x->wait.lock, flags);
 
-	/*
-	 * Perform commit of crossrelease here.
-	 */
-	complete_release_commit(x);
-
 	if (x->done != UINT_MAX)
 		x->done++;
 	__wake_up_locked(&x->wait, TASK_NORMAL, 1);