[PATCH] Add noinline attribute

From: Andi Kleen <ak@muc.de>

This patch adds the `noinline' function attribute.  It can be used to
explicitly tell the compiler to not inline functions.

We need this due to what is, IMO, a bug present in gcc-3.4 and current
gcc-3.5 CVS: the compiler is inlining init/main.c:rest_init() inside
init/main.c:start_kernel(), despite the fact that thay are declared to be
placed in different text sections.

include/linux/compiler-gcc3.h

@@ -21,3 +21,7 @@
 
 #define __attribute_pure__	__attribute__((pure))
 #define __attribute_const__	__attribute__((__const__))
+
+#if __GNUC_MINOR__ >= 1
+#define  noinline __attribute__((noinline))
+#endif

include/linux/compiler.h

@@ -96,6 +96,10 @@
 # define __attribute_const__	/* unimplemented */
 #endif
 
+#ifndef noinline
+#define noinline
+#endif
+
 /* Optimization barrier */
 #ifndef barrier
 # define barrier() __memory_barrier()