diff --git a/usr/src/pkg/manifests/system-test-libctest.p5m b/usr/src/pkg/manifests/system-test-libctest.p5m
index 07f82a6e630a..34231d299722 100644
--- a/usr/src/pkg/manifests/system-test-libctest.p5m
+++ b/usr/src/pkg/manifests/system-test-libctest.p5m
@@ -48,6 +48,7 @@ file path=opt/libc-tests/cfg/symbols/stdlib_h.cfg mode=0444
 file path=opt/libc-tests/cfg/symbols/stdnoreturn_h.cfg mode=0444
 file path=opt/libc-tests/cfg/symbols/string_h.cfg mode=0444
 file path=opt/libc-tests/cfg/symbols/strings_h.cfg mode=0444
+file path=opt/libc-tests/cfg/symbols/sys_atomic_h.cfg mode=0444
 file path=opt/libc-tests/cfg/symbols/sys_stat_h.cfg mode=0444
 file path=opt/libc-tests/cfg/symbols/sys_time_h.cfg mode=0444
 file path=opt/libc-tests/cfg/symbols/sys_timeb_h.cfg mode=0444
@@ -197,6 +198,7 @@ hardlink path=opt/libc-tests/tests/symbols/string_h target=setup
 hardlink path=opt/libc-tests/tests/symbols/strings_h target=setup
 file path=opt/libc-tests/tests/symbols/symbols_test.$(ARCH) mode=0555
 file path=opt/libc-tests/tests/symbols/symbols_test.$(ARCH64) mode=0555
+hardlink path=opt/libc-tests/tests/symbols/sys_atomic_h target=setup
 hardlink path=opt/libc-tests/tests/symbols/sys_stat_h target=setup
 hardlink path=opt/libc-tests/tests/symbols/sys_time_h target=setup
 hardlink path=opt/libc-tests/tests/symbols/sys_timeb_h target=setup
diff --git a/usr/src/test/libc-tests/cfg/Makefile b/usr/src/test/libc-tests/cfg/Makefile
index 3f87dc9e9f84..0fb1a4096ac6 100644
--- a/usr/src/test/libc-tests/cfg/Makefile
+++ b/usr/src/test/libc-tests/cfg/Makefile
@@ -35,6 +35,7 @@ CFGS = README \
 	symbols/stdnoreturn_h.cfg \
 	symbols/string_h.cfg \
 	symbols/strings_h.cfg \
+	symbols/sys_atomic_h.cfg \
 	symbols/sys_stat_h.cfg \
 	symbols/sys_time_h.cfg \
 	symbols/sys_timeb_h.cfg \
diff --git a/usr/src/test/libc-tests/cfg/symbols/sys_atomic_h.cfg b/usr/src/test/libc-tests/cfg/symbols/sys_atomic_h.cfg
new file mode 100644
index 000000000000..82c115d593ed
--- /dev/null
+++ b/usr/src/test/libc-tests/cfg/symbols/sys_atomic_h.cfg
@@ -0,0 +1,569 @@
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+#
+# Copyright 2022 Oxide Computer Company
+#
+
+#
+# Definitions found in sys/atomic.h. Note, this is a non-standard header
+# so including it means that everything will always be visible. This is
+# included as part of regression tests for #14329. We are currently
+# assuming the following here:
+#
+#  o _ASM_INLINES is not defined (this is generally only used in the
+#    kernel)
+#
+
+#
+# Types
+#
+
+#
+# Values.
+#
+
+#
+# Defines
+#
+
+#
+# Functions
+#
+func | atomic_inc_8					|\
+	void						|\
+	volatile uint8_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_uchar					|\
+	void						|\
+	volatile uchar_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_16					|\
+	void						|\
+	volatile uint16_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_ushort				|\
+	void						|\
+	volatile ushort_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_32					|\
+	void						|\
+	volatile uint32_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_uint					|\
+	void						|\
+	volatile uint_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_ulong					|\
+	void						|\
+	volatile ulong_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_64					|\
+	void						|\
+	volatile uint64_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_8					|\
+	void						|\
+	volatile uint8_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_uchar					|\
+	void						|\
+	volatile uchar_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_16					|\
+	void						|\
+	volatile uint16_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_ushort				|\
+	void						|\
+	volatile ushort_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_32					|\
+	void						|\
+	volatile uint32_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_uint					|\
+	void						|\
+	volatile uint_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_ulong					|\
+	void						|\
+	volatile ulong_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_64					|\
+	void						|\
+	volatile uint64_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_8					|\
+	void						|\
+	volatile uint8_t *; int8_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_char					|\
+	void						|\
+	volatile uchar_t *; signed char			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_16					|\
+	void						|\
+	volatile uint16_t *; int16_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_short					|\
+	void						|\
+	volatile ushort_t *; short			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_32					|\
+	void						|\
+	volatile uint32_t *; int32_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_int					|\
+	void						|\
+	volatile uint_t *; int				|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_ptr					|\
+	void						|\
+	volatile void *; ssize_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_long					|\
+	void						|\
+	volatile ulong_t *; long			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_64					|\
+	void						|\
+	volatile uint64_t *; int64_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_8					|\
+	void						|\
+	volatile uint8_t *; uint8_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_uchar					|\
+	void						|\
+	volatile uchar_t *; uchar_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_16					|\
+	void						|\
+	volatile uint16_t *; uint16_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_ushort					|\
+	void						|\
+	volatile ushort_t *; ushort_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_32					|\
+	void						|\
+	volatile uint32_t *; uint32_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_uint					|\
+	void						|\
+	volatile uint_t *; uint_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_ulong					|\
+	void						|\
+	volatile ulong_t *; ulong_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_64					|\
+	void						|\
+	volatile uint64_t *; uint64_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_8					|\
+	void						|\
+	volatile uint8_t *; uint8_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_uchar					|\
+	void						|\
+	volatile uchar_t *; uchar_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_16					|\
+	void						|\
+	volatile uint16_t *; uint16_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_ushort				|\
+	void						|\
+	volatile ushort_t *; ushort_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_32					|\
+	void						|\
+	volatile uint32_t *; uint32_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_uint					|\
+	void						|\
+	volatile uint_t *; uint_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_ulong					|\
+	void						|\
+	volatile ulong_t *; ulong_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_64					|\
+	void						|\
+	volatile uint64_t *; uint64_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_8_nv					|\
+	uint8_t						|\
+	volatile uint8_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_uchar_nv				|\
+	uchar_t						|\
+	volatile uchar_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_16_nv					|\
+	uint16_t					|\
+	volatile uint16_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_ushort_nv				|\
+	ushort_t					|\
+	volatile ushort_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_32_nv					|\
+	uint32_t					|\
+	volatile uint32_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_uint_nv				|\
+	uint_t						|\
+	volatile uint_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_ulong_nv				|\
+	ulong_t						|\
+	volatile ulong_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_inc_64_nv					|\
+	uint64_t					|\
+	volatile uint64_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_8_nv					|\
+	uint8_t						|\
+	volatile uint8_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_uchar_nv				|\
+	uchar_t						|\
+	volatile uchar_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_16_nv					|\
+	uint16_t					|\
+	volatile uint16_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_ushort_nv				|\
+	ushort_t					|\
+	volatile ushort_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_32_nv					|\
+	uint32_t					|\
+	volatile uint32_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_uint_nv				|\
+	uint_t						|\
+	volatile uint_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_ulong_nv				|\
+	ulong_t						|\
+	volatile ulong_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_dec_64_nv					|\
+	uint64_t					|\
+	volatile uint64_t *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_8_nv					|\
+	uint8_t						|\
+	volatile uint8_t *; int8_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_char_nv				|\
+	uchar_t						|\
+	volatile uchar_t *; signed char			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_16_nv					|\
+	uint16_t					|\
+	volatile uint16_t *; int16_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_short_nv				|\
+	ushort_t					|\
+	volatile ushort_t *; short			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_32_nv					|\
+	uint32_t					|\
+	volatile uint32_t *; int32_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_int_nv				|\
+	uint_t						|\
+	volatile uint_t *; int				|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_ptr_nv				|\
+	void *						|\
+	volatile void *; ssize_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_long_nv				|\
+	ulong_t						|\
+	volatile ulong_t *; long			|\
+	sys/atomic.h | +ALL
+
+func | atomic_add_64_nv					|\
+	uint64_t					|\
+	volatile uint64_t *; int64_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_8_nv					|\
+	uint8_t						|\
+	volatile uint8_t *; uint8_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_uchar_nv				|\
+	uchar_t						|\
+	volatile uchar_t *; uchar_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_16_nv					|\
+	uint16_t					|\
+	volatile uint16_t *; uint16_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_ushort_nv				|\
+	ushort_t					|\
+	volatile ushort_t *; ushort_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_32_nv					|\
+	uint32_t					|\
+	volatile uint32_t *; uint32_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_uint_nv				|\
+	uint_t						|\
+	volatile uint_t *; uint_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_ulong_nv				|\
+	ulong_t						|\
+	volatile ulong_t *; ulong_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_or_64_nv					|\
+	uint64_t					|\
+	volatile uint64_t *; uint64_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_8_nv					|\
+	uint8_t						|\
+	volatile uint8_t *; uint8_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_uchar_nv				|\
+	uchar_t						|\
+	volatile uchar_t *; uchar_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_16_nv					|\
+	uint16_t					|\
+	volatile uint16_t *; uint16_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_ushort_nv				|\
+	ushort_t					|\
+	volatile ushort_t *; ushort_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_32_nv					|\
+	uint32_t					|\
+	volatile uint32_t *; uint32_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_uint_nv				|\
+	uint_t						|\
+	volatile uint_t *; uint_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_ulong_nv				|\
+	ulong_t						|\
+	volatile ulong_t *; ulong_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_and_64_nv					|\
+	uint64_t					|\
+	volatile uint64_t *; uint64_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_cas_8					|\
+	void						|\
+	volatile uint8_t *; uint8_t; uint8_t		|\
+	sys/atomic.h | +ALL
+
+func | atomic_cas_uchar					|\
+	void						|\
+	volatile uchar_t *; uchar_t; uchar_t		|\
+	sys/atomic.h | +ALL
+
+func | atomic_cas_16					|\
+	void						|\
+	volatile uint16_t *; uint16_t; uint16_t		|\
+	sys/atomic.h | +ALL
+
+func | atomic_cas_ushort				|\
+	void						|\
+	volatile ushort_t *; ushort_t; ushort_t		|\
+	sys/atomic.h | +ALL
+
+func | atomic_cas_32					|\
+	void						|\
+	volatile uint32_t *; uint32_t; uint32_t		|\
+	sys/atomic.h | +ALL
+
+func | atomic_cas_uint					|\
+	void						|\
+	volatile uint_t *; uint_t; uint_t		|\
+	sys/atomic.h | +ALL
+
+func | atomic_cas_ptr					|\
+	void						|\
+	volatile void *; void *; void *			|\
+	sys/atomic.h | +ALL
+
+func | atomic_cas_ulong					|\
+	void						|\
+	volatile ulong_t *; ulong_t; ulong_t		|\
+	sys/atomic.h | +ALL
+
+func | atomic_cas_64					|\
+	void						|\
+	volatile uint64_t *; uint64_t; uint64_t		|\
+	sys/atomic.h | +ALL
+
+func | atomic_swap_8					|\
+	void						|\
+	volatile uint8_t *; uint8_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_swap_uchar				|\
+	void						|\
+	volatile uchar_t *; uchar_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_swap_16					|\
+	void						|\
+	volatile uint16_t *; uint16_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_swap_ushort				|\
+	void						|\
+	volatile ushort_t *; ushort_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_swap_32					|\
+	void						|\
+	volatile uint32_t *; uint32_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_swap_uint					|\
+	void						|\
+	volatile uint_t *; uint_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_swap_ptr					|\
+	void						|\
+	volatile void *; void *				|\
+	sys/atomic.h | +ALL
+
+func | atomic_swap_ulong				|\
+	void						|\
+	volatile ulong_t *; ulong_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_swap_64					|\
+	void						|\
+	volatile uint64_t *; uint64_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_set_long_excl				|\
+	int						|\
+	volatile ulong_t *; uint_t			|\
+	sys/atomic.h | +ALL
+
+func | atomic_clear_long_excl				|\
+	int						|\
+	volatile ulong_t *; uint_t			|\
+	sys/atomic.h | +ALL
+
+func | membar_enter					|\
+	void						|\
+	void						|\
+	sys/atomic.h | +ALL
+
+func | membar_exit					|\
+	void						|\
+	void						|\
+	sys/atomic.h | +ALL
+
+func | membar_producer					|\
+	void						|\
+	void						|\
+	sys/atomic.h | +ALL
+
+func | membar_consumer					|\
+	void						|\
+	void						|\
+	sys/atomic.h | +ALL
diff --git a/usr/src/test/libc-tests/runfiles/default.run b/usr/src/test/libc-tests/runfiles/default.run
index 4b6d1a4a7439..d08475b596be 100644
--- a/usr/src/test/libc-tests/runfiles/default.run
+++ b/usr/src/test/libc-tests/runfiles/default.run
@@ -156,6 +156,7 @@ tests = [
 	'stdnoreturn_h',
 	'string_h',
 	'strings_h',
+	'sys_atomic_h',
 	'sys_stat_h',
 	'sys_time_h',
 	'sys_timeb_h',
diff --git a/usr/src/test/libc-tests/tests/symbols/Makefile b/usr/src/test/libc-tests/tests/symbols/Makefile
index a5eef8a3a80a..8377810b83c2 100644
--- a/usr/src/test/libc-tests/tests/symbols/Makefile
+++ b/usr/src/test/libc-tests/tests/symbols/Makefile
@@ -36,6 +36,7 @@ SYMTESTS = \
 	stdnoreturn_h \
 	string_h \
 	strings_h \
+	sys_atomic_h \
 	sys_stat_h \
 	sys_time_h \
 	sys_timeb_h \
diff --git a/usr/src/uts/common/sys/atomic.h b/usr/src/uts/common/sys/atomic.h
index 774e8125f318..a2cb51c6ad26 100644
--- a/usr/src/uts/common/sys/atomic.h
+++ b/usr/src/uts/common/sys/atomic.h
@@ -53,6 +53,7 @@ extern void atomic_inc_uint(volatile uint_t *);
 extern void atomic_inc_ulong(volatile ulong_t *);
 #if defined(_KERNEL) || defined(_INT64_TYPE)
 extern void atomic_inc_64(volatile uint64_t *);
+#endif
 
 /*
  * Decrement target
@@ -262,7 +263,6 @@ extern void membar_producer(void);
  * after the available flag has been seen, i.e. it imposes load ordering.
  */
 extern void membar_consumer(void);
-#endif
 
 #if defined(_KERNEL)
 
@@ -272,10 +272,6 @@ extern void membar_consumer(void);
 #define	casip			atomic_cas_ulong
 #endif
 
-#if defined(__sparc)
-extern uint8_t ldstub(uint8_t *);
-#endif
-
 #endif	/* _KERNEL */
 
 #ifdef	__cplusplus