[PATCH] GCC 2.95.4 needs the spinlock workaround

From: Mikael Pettersson <mikpe@csd.uu.se>

2.5.73 removed the workaround needed to prevent gcc-2.95.x from
miscompiling spinlocks on UP.  It turns out that some versions of
gcc-2.95 still do have problems with empty structs, so re-introduce
the workaround.

include/linux/spinlock.h

@@ -146,8 +146,13 @@ typedef struct {
 /*
  * gcc versions before ~2.95 have a nasty bug with empty initializers.
  */
-typedef struct { } spinlock_t;
-#define SPIN_LOCK_UNLOCKED (spinlock_t) { }
+#if (__GNUC__ > 2)
+  typedef struct { } spinlock_t;
+  #define SPIN_LOCK_UNLOCKED (spinlock_t) { }
+#else
+  typedef struct { int gcc_is_buggy; } spinlock_t;
+  #define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 }
+#endif
 
 /*
  * If CONFIG_SMP is unset, declare the _raw_* definitions as nops