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>

1 files changed, 22 insertions, 20 deletions

diff --git a/include/linux/module.h b/include/linux/module.h
index 3e03b1acbc94..63f0eb69e214 100644
--- 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 {}