module: reorder struct module to save space on 64 bit builds

reorder struct module to save space on 64 bit builds.
saves 1 cacheline_size  (128 on default x86_64 & 64 on AMD
Opteron/athlon) when CONFIG_MODULE_UNLOAD=y.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/include/linux/module.h b/include/linux/module.h
index 3e03b1a..63f0eb6 100644 (file)
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -249,27 +249,28 @@ struct module
 
        /* Exported symbols */
        const struct kernel_symbol *syms;
-       unsigned int num_syms;
        const unsigned long *crcs;
+       unsigned int num_syms;
 
        /* GPL-only exported symbols. */
-       const struct kernel_symbol *gpl_syms;
        unsigned int num_gpl_syms;
+       const struct kernel_symbol *gpl_syms;
        const unsigned long *gpl_crcs;
 
        /* unused exported symbols. */
        const struct kernel_symbol *unused_syms;
-       unsigned int num_unused_syms;
        const unsigned long *unused_crcs;
+       unsigned int num_unused_syms;
+
        /* GPL-only, unused exported symbols. */
-       const struct kernel_symbol *unused_gpl_syms;
        unsigned int num_unused_gpl_syms;
+       const struct kernel_symbol *unused_gpl_syms;
        const unsigned long *unused_gpl_crcs;
 
        /* symbols that will be GPL-only in the near future. */
        const struct kernel_symbol *gpl_future_syms;
-       unsigned int num_gpl_future_syms;
        const unsigned long *gpl_future_crcs;
+       unsigned int num_gpl_future_syms;
 
        /* Exception table */
        unsigned int num_exentries;
@@ -300,23 +301,9 @@ struct module
 
 #ifdef CONFIG_GENERIC_BUG
        /* Support for BUG */
+       unsigned num_bugs;
        struct list_head bug_list;
        struct bug_entry *bug_table;
-       unsigned num_bugs;
-#endif
-
-#ifdef CONFIG_MODULE_UNLOAD
-       /* Reference counts */
-       struct module_ref ref[NR_CPUS];
-
-       /* What modules depend on me? */
-       struct list_head modules_which_use_me;
-
-       /* Who is waiting for us to be unloaded */
-       struct task_struct *waiter;
-
-       /* Destruction function. */
-       void (*exit)(void);
 #endif
 
 #ifdef CONFIG_KALLSYMS
@@ -342,6 +329,21 @@ struct module
        struct marker *markers;
        unsigned int num_markers;
 #endif
+
+#ifdef CONFIG_MODULE_UNLOAD
+       /* What modules depend on me? */
+       struct list_head modules_which_use_me;
+
+       /* Who is waiting for us to be unloaded */
+       struct task_struct *waiter;
+
+       /* Destruction function. */
+       void (*exit)(void);
+
+       /* Reference counts */
+       struct module_ref ref[NR_CPUS];
+#endif
+
 };
 #ifndef MODULE_ARCH_INIT
 #define MODULE_ARCH_INIT {}