Subject: [PATCH v4 1/3] Remove fallback declaration for tas().

From: Nathan Bossart <[email-masked]>
Date: Mon, 4 May 2026 16:04:04 -0500

The last definition of tas() in s_lock.c was removed in commit
718aa43a4e, and the last tas.s file was removed in commit
25f36066dd, so this is dead code.
---
 src/backend/Makefile         | 2 +-
 src/backend/port/.gitignore  | 1 -
 src/backend/port/meson.build | 2 +-
 src/include/storage/s_lock.h | 7 -------
 4 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/src/backend/Makefile b/src/backend/Makefile
index 162d3f1f2a9..4bb76d3d397 100644
--- a/src/backend/Makefile
+++ b/src/backend/Makefile
@@ -301,7 +301,7 @@ endif
 
 distclean: clean
 # generated by configure
-	rm -f port/tas.s port/pg_sema.c port/pg_shmem.c
+	rm -f port/pg_sema.c port/pg_shmem.c

 ##########################################################################
diff --git a/src/backend/port/.gitignore b/src/backend/port/.gitignore
index 4ef36b82c77..6c5067a4a9f 100644
--- a/src/backend/port/.gitignore
+++ b/src/backend/port/.gitignore
@@ -1,3 +1,2 @@
 /pg_sema.c
 /pg_shmem.c
-/tas.s
diff --git a/src/backend/port/meson.build b/src/backend/port/meson.build
index e8b7da8d281..29e88ef3541 100644
--- a/src/backend/port/meson.build
+++ b/src/backend/port/meson.build
@@ -30,4 +30,4 @@ if host_system == 'windows'
 endif
 
 # autoconf generates the file there, ensure we get a conflict
-generated_sources_ac += {'src/backend/port': ['pg_sema.c', 'pg_shmem.c', 'tas.s']}
+generated_sources_ac += {'src/backend/port': ['pg_sema.c', 'pg_shmem.c']}
diff --git a/src/include/storage/s_lock.h b/src/include/storage/s_lock.h
index c9e52511990..dcfec8ce2af 100644
--- a/src/include/storage/s_lock.h
+++ b/src/include/storage/s_lock.h
@@ -697,13 +697,6 @@ extern void s_unlock(volatile slock_t *lock);
 #define SPIN_DELAY()	((void) 0)
 #endif	 /* SPIN_DELAY */
 
-#if !defined(TAS)
-extern int	tas(volatile slock_t *lock);		/* in port/.../tas.s, or
-												 * s_lock.c */
-
-#define TAS(lock)		tas(lock)
-#endif	 /* TAS */
-
 #if !defined(TAS_SPIN)
 #define TAS_SPIN(lock)	TAS(lock)
 #endif	 /* TAS_SPIN */
-- 
2.50.1 (Apple Git-155)

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