patch-2.4.19 linux-2.4.19/include/linux/spinlock.h

• Lines: 45
• Date: Fri Aug 2 17:39:46 2002
• Orig file: linux-2.4.18/include/linux/spinlock.h
• Orig date: Thu Nov 22 11:46:19 2001

diff -urN linux-2.4.18/include/linux/spinlock.h linux-2.4.19/include/linux/spinlock.h
@@ -35,6 +35,23 @@
 						if (!__r) local_bh_enable();   \
 						__r; })
 
+/* Must define these before including other files, inline functions need them */
+
+#include <linux/stringify.h>
+
+#define LOCK_SECTION_NAME			\
+	".text.lock." __stringify(KBUILD_BASENAME)
+
+#define LOCK_SECTION_START(extra)		\
+	".subsection 1\n\t"			\
+	extra					\
+	".ifndef " LOCK_SECTION_NAME "\n\t"	\
+	LOCK_SECTION_NAME ":\n\t"		\
+	".endif\n\t"
+
+#define LOCK_SECTION_END			\
+	".previous\n\t"
+
 #ifdef CONFIG_SMP
 #include <asm/spinlock.h>
 
@@ -138,4 +155,20 @@
 extern int atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock);
 #endif
 
+#ifdef CONFIG_SMP
+#include <linux/cache.h>
+
+typedef union {
+    spinlock_t lock;
+    char fill_up[(SMP_CACHE_BYTES)];
+} spinlock_cacheline_t __attribute__ ((aligned(SMP_CACHE_BYTES)));
+
+#else	/* SMP */
+
+typedef struct {
+    spinlock_t lock;
+} spinlock_cacheline_t;
+
+
+#endif
 #endif /* __LINUX_SPINLOCK_H */