add explicit barrier operation to internal atomic.h API

diff --git a/arch/arm/atomic.h b/arch/arm/atomic.h
index 738f528..8665c87 100644 (file)
--- a/arch/arm/atomic.h
+++ b/arch/arm/atomic.h
@@ -101,7 +101,9 @@ static inline void a_store(volatile int *p, int x)
        while (__k_cas(*p, x, p));
 }
 
-static inline void a_spin()
+#define a_spin a_barrier
+
+static inline void a_barrier()
 {
        __k_cas(0, 0, &(int){0});
 }

diff --git a/arch/i386/atomic.h b/arch/i386/atomic.h
index 8a2a123..4fe7bde 100644 (file)
--- a/arch/i386/atomic.h
+++ b/arch/i386/atomic.h
@@ -96,6 +96,11 @@ static inline void a_spin()
        __asm__ __volatile__( "pause" : : : "memory" );
 }
 
+static inline void a_barrier()
+{
+       __asm__ __volatile__( "" : : : "memory" );
+}
+
 static inline void a_crash()
 {
        __asm__ __volatile__( "hlt" : : : "memory" );

diff --git a/arch/microblaze/atomic.h b/arch/microblaze/atomic.h
index abb79b5..93404b9 100644 (file)
--- a/arch/microblaze/atomic.h
+++ b/arch/microblaze/atomic.h
@@ -95,7 +95,9 @@ static inline void a_store(volatile int *p, int x)
                : "=m"(*p) : "r"(x) : "memory" );
 }
 
-static inline void a_spin()
+#define a_spin a_barrier
+
+static inline void a_barrier()
 {
        a_cas(&(int){0}, 0, 0);
 }

diff --git a/arch/mips/atomic.h b/arch/mips/atomic.h
index cc5bf49..c82046a 100644 (file)
--- a/arch/mips/atomic.h
+++ b/arch/mips/atomic.h
@@ -135,7 +135,9 @@ static inline void a_store(volatile int *p, int x)
                : "+m"(*p) : "r"(x) : "memory" );
 }
 
-static inline void a_spin()
+#define a_spin a_barrier
+
+static inline void a_barrier()
 {
        a_cas(&(int){0}, 0, 0);
 }

diff --git a/arch/or1k/atomic.h b/arch/or1k/atomic.h
index f9e6981..640ff43 100644 (file)
--- a/arch/or1k/atomic.h
+++ b/arch/or1k/atomic.h
@@ -72,7 +72,9 @@ static inline void a_store(volatile int *p, int x)
        a_swap(p, x);
 }
 
-static inline void a_spin()
+#define a_spin a_barrier
+
+static inline void a_barrier()
 {
        a_cas(&(int){0}, 0, 0);
 }

diff --git a/arch/powerpc/atomic.h b/arch/powerpc/atomic.h
index 1c50361..f706543 100644 (file)
--- a/arch/powerpc/atomic.h
+++ b/arch/powerpc/atomic.h
@@ -78,7 +78,9 @@ static inline void a_store(volatile int *p, int x)
                : "=m"(*p) : "r"(x) : "memory" );
 }
 
-static inline void a_spin()
+#define a_spin a_barrier
+
+static inline void a_barrier()
 {
        a_cas(&(int){0}, 0, 0);
 }

diff --git a/arch/sh/atomic.h b/arch/sh/atomic.h
index b95bbff..a1d22e4 100644 (file)
--- a/arch/sh/atomic.h
+++ b/arch/sh/atomic.h
@@ -51,7 +51,9 @@ static inline void a_dec(volatile int *x)
        a_fetch_add(x, -1);
 }
 
-static inline void a_spin()
+#define a_spin a_barrier
+
+static inline void a_barrier()
 {
        a_cas(&(int){0}, 0, 0);
 }

diff --git a/arch/x32/atomic.h b/arch/x32/atomic.h
index ae0a576..333098c 100644 (file)
--- a/arch/x32/atomic.h
+++ b/arch/x32/atomic.h
@@ -91,6 +91,11 @@ static inline void a_spin()
        __asm__ __volatile__( "pause" : : : "memory" );
 }
 
+static inline void a_barrier()
+{
+       __asm__ __volatile__( "" : : : "memory" );
+}
+
 static inline void a_crash()
 {
        __asm__ __volatile__( "hlt" : : : "memory" );

diff --git a/arch/x86_64/atomic.h b/arch/x86_64/atomic.h
index ae0a576..333098c 100644 (file)
--- a/arch/x86_64/atomic.h
+++ b/arch/x86_64/atomic.h
@@ -91,6 +91,11 @@ static inline void a_spin()
        __asm__ __volatile__( "pause" : : : "memory" );
 }
 
+static inline void a_barrier()
+{
+       __asm__ __volatile__( "" : : : "memory" );
+}
+
 static inline void a_crash()
 {
        __asm__ __volatile__( "hlt" : : : "memory" );