X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=include%2Flinux%2Fcompiler.h;h=8287a72bb6a913d01f7ca1def252880317dda297;hb=759448f459234bfcf34b82471f0dba77a9aca498;hp=538423d4a865de29981ff7a2208fb1afc77ccd43;hpb=946b92437e550d6ed80213bf54a1f383e141aede;p=mv-sheeva.git

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 538423d4a86..8287a72bb6a 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -15,8 +15,8 @@
 # define __acquire(x)	__context__(x,1)
 # define __release(x)	__context__(x,-1)
 # define __cond_lock(x,c)	((c) ? ({ __acquire(x); 1; }) : 0)
-extern void __chk_user_ptr(void __user *);
-extern void __chk_io_ptr(void __iomem *);
+extern void __chk_user_ptr(const void __user *);
+extern void __chk_io_ptr(const void __iomem *);
 #else
 # define __user
 # define __kernel
@@ -36,11 +36,9 @@ extern void __chk_io_ptr(void __iomem *);
 
 #ifdef __KERNEL__
 
-#if __GNUC__ > 4
-#error no compiler-gcc.h file for this gcc version
-#elif __GNUC__ == 4
+#if __GNUC__ >= 4
 # include <linux/compiler-gcc4.h>
-#elif __GNUC__ == 3
+#elif __GNUC__ == 3 && __GNUC_MINOR__ >= 2
 # include <linux/compiler-gcc3.h>
 #else
 # error Sorry, your compiler is too old/not recognized.
@@ -108,15 +106,30 @@ extern void __chk_io_ptr(void __iomem *);
  * Allow us to avoid 'defined but not used' warnings on functions and data,
  * as well as force them to be emitted to the assembly file.
  *
- * As of gcc 3.3, static functions that are not marked with attribute((used))
- * may be elided from the assembly file.  As of gcc 3.3, static data not so
+ * As of gcc 3.4, static functions that are not marked with attribute((used))
+ * may be elided from the assembly file.  As of gcc 3.4, static data not so
  * marked will not be elided, but this may change in a future gcc version.
  *
+ * NOTE: Because distributions shipped with a backported unit-at-a-time
+ * compiler in gcc 3.3, we must define __used to be __attribute__((used))
+ * for gcc >=3.3 instead of 3.4.
+ *
  * In prior versions of gcc, such functions and data would be emitted, but
  * would be warned about except with attribute((unused)).
+ *
+ * Mark functions that are referenced only in inline assembly as __used so
+ * the code is emitted even though it appears to be unreferenced.
  */
 #ifndef __attribute_used__
-# define __attribute_used__	/* unimplemented */
+# define __attribute_used__	/* deprecated */
+#endif
+
+#ifndef __used
+# define __used			/* unimplemented */
+#endif
+
+#ifndef __maybe_unused
+# define __maybe_unused		/* unimplemented */
 #endif
 
 /*