From 643f2e675fef74bee80645826b8c1ac848e75a2c Mon Sep 17 00:00:00 2001
From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Sat, 17 Oct 2020 12:41:41 -0700
Subject: [PATCH] remove no-op SFMTXLOCK()

---
 lib/sfio/sfhdr.h   | 1 -
 lib/sfio/sfmode.c  | 1 -
 lib/sfio/sfstack.c | 6 ------
 3 files changed, 8 deletions(-)

diff --git a/lib/sfio/sfhdr.h b/lib/sfio/sfhdr.h
index 51cbe7aad..7db0b8d57 100644
--- a/lib/sfio/sfhdr.h
+++ b/lib/sfio/sfhdr.h
@@ -85,7 +85,6 @@ extern "C" {
 #undef SF_MTSAFE		/* no need to worry about thread-safety */
 #define SF_MTSAFE		0
 
-#define SFMTXLOCK(f)		(void)(0)
 #define SFMTXUNLOCK(f)		(void)(0)
 #define SFMTXSTART(f,v)		{ if(!f) return(v); }
 #define SFMTXRETURN(f,v)	{ return(v); }
diff --git a/lib/sfio/sfmode.c b/lib/sfio/sfmode.c
index d673e49e7..657855c2c 100644
--- a/lib/sfio/sfmode.c
+++ b/lib/sfio/sfmode.c
@@ -60,7 +60,6 @@ static void _sfcleanup(void)
 		continue;
 
 	    SFLOCK(f, 0);
-	    SFMTXLOCK(f);
 
 	    /* let application know that we are leaving */
 	    (void) SFRAISE(f, SF_ATEXIT, NIL(void *));
diff --git a/lib/sfio/sfstack.c b/lib/sfio/sfstack.c
index e7ef77ae6..2c765c496 100644
--- a/lib/sfio/sfstack.c
+++ b/lib/sfio/sfstack.c
@@ -19,10 +19,6 @@
 **	Written by Kiem-Phong Vo.
 */
 
-#define STKMTXLOCK(f1,f2) \
-	{ if(f1) SFMTXLOCK(f1); \
-	  if(f2) SFMTXLOCK(f2); \
-	}
 #define STKMTXRETURN(f1,f2,rv) \
 	{ if(f1) SFMTXUNLOCK(f1); \
 	  if(f2) SFMTXUNLOCK(f2); \
@@ -39,8 +35,6 @@ Sfio_t *sfstack(Sfio_t * f1, Sfio_t * f2)
     Sfio_t *rf;
     Sfrsrv_t *rsrv;
 
-    STKMTXLOCK(f1, f2);
-
     if (f1 && (f1->mode & SF_RDWR) != f1->mode && _sfmode(f1, 0, 0) < 0)
 	STKMTXRETURN(f1, f2, NIL(Sfio_t *));
     if (f2 && (f2->mode & SF_RDWR) != f2->mode && _sfmode(f2, 0, 0) < 0)
-- 
2.40.0