Re: Kernel panic during SysRq-b on Alpha

[Ivan Kokshaysky <ink@jurassic.park.msu.ru>]

On Thu, Sep 22, 2005 at 02:21:52AM -0700, Andrew Morton wrote:
> hm, you might need to do some special-casing around that function.

Maybe something like this?
I think this also makes more obvious how index_of() was
supposed to work.

Ivan.

--- 2.6.14-rc1/include/asm-alpha/compiler.h.inline	Mon Aug 29 03:41:01 2005
+++ linux/include/asm-alpha/compiler.h	Thu Sep 22 13:49:53 2005
@@ -98,6 +98,9 @@
 #undef inline
 #undef __inline__
 #undef __inline
-
+#if __GNUC__ == 3 && __GNUC_MINOR__ >= 1 || __GNUC__ > 3
+#undef __always_inline
+#define __always_inline		inline __attribute__((always_inline))
+#endif
 
 #endif /* __ALPHA_COMPILER_H */
--- 2.6.14-rc1/mm/slab.c	Tue Sep 13 14:16:37 2005
+++ linux/mm/slab.c	Thu Sep 22 13:58:18 2005
@@ -308,12 +308,12 @@ struct kmem_list3 __initdata initkmem_li
 #define	SIZE_L3 (1 + MAX_NUMNODES)
 
 /*
- * This function may be completely optimized away if
+ * This function must be completely optimized away if
  * a constant is passed to it. Mostly the same as
  * what is in linux/slab.h except it returns an
  * index.
  */
-static inline int index_of(const size_t size)
+static __always_inline int index_of(const size_t size)
 {
 	if (__builtin_constant_p(size)) {
 		int i = 0;
@@ -329,7 +329,8 @@ static inline int index_of(const size_t 
 			extern void __bad_size(void);
 			__bad_size();
 		}
-	}
+	} else
+		BUG();
 	return 0;
 }
 
-
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