Remove external linkage for spin_adaptive

The external linkage for spin_adaptive was not used, and the inline
declaration of spin_adaptive that was used caused a probem on FreeBSD
where CPU_SPINWAIT is implemented as a call to a static procedure for
x86 architectures.

Makefile.in

@@ -112,7 +112,6 @@ C_SRCS := $(srcroot)src/jemalloc.c \
 	$(srcroot)src/prof.c \
 	$(srcroot)src/rtree.c \
 	$(srcroot)src/stats.c \
-	$(srcroot)src/spin.c \
 	$(srcroot)src/sz.c \
 	$(srcroot)src/tcache.c \
 	$(srcroot)src/ticker.c \

include/jemalloc/internal/spin.h

@@ -1,19 +1,13 @@
 #ifndef JEMALLOC_INTERNAL_SPIN_H
 #define JEMALLOC_INTERNAL_SPIN_H
 
-#ifdef JEMALLOC_SPIN_C_
-#  define SPIN_INLINE extern inline
-#else
-#  define SPIN_INLINE inline
-#endif
-
 #define SPIN_INITIALIZER {0U}
 
 typedef struct {
 	unsigned iteration;
 } spin_t;
 
-SPIN_INLINE void
+static inline void
 spin_adaptive(spin_t *spin) {
 	volatile uint32_t i;
 

msvc/projects/vc2015/jemalloc/jemalloc.vcxproj

@@ -56,7 +56,6 @@
     <ClCompile Include="..\..\..\..\src\prng.c" />
     <ClCompile Include="..\..\..\..\src\prof.c" />
     <ClCompile Include="..\..\..\..\src\rtree.c" />
-    <ClCompile Include="..\..\..\..\src\spin.c" />
     <ClCompile Include="..\..\..\..\src\stats.c" />
     <ClCompile Include="..\..\..\..\src\sz.c" />
     <ClCompile Include="..\..\..\..\src\tcache.c" />

msvc/projects/vc2015/jemalloc/jemalloc.vcxproj.filters

@@ -70,9 +70,6 @@
     <ClCompile Include="..\..\..\..\src\rtree.c">
       <Filter>Source Files</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\..\..\src\spin.c">
-      <Filter>Source Files</Filter>
-    </ClCompile>
     <ClCompile Include="..\..\..\..\src\stats.c">
       <Filter>Source Files</Filter>
     </ClCompile>

src/spin.c

@@ -1,4 +0,0 @@
-#define JEMALLOC_SPIN_C_
-#include "jemalloc/internal/jemalloc_preamble.h"
-
-#include "jemalloc/internal/spin.h"