reiserfs: fix oops while creating privroot with selinux enabled

[safe/jmp/linux-2.6] / include / linux / module.h

diff --git a/include/linux/module.h b/include/linux/module.h
index 1c755b2..5e869ff 100644 (file)
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -17,7 +17,7 @@
 #include <linux/moduleparam.h>
 #include <linux/tracepoint.h>
 
-#include <asm/local.h>
+#include <linux/percpu.h>
 #include <asm/module.h>
 
 #include <trace/events/module.h>
@@ -25,8 +25,10 @@
 /* Not Yet Implemented */
 #define MODULE_SUPPORTED_DEVICE(name)
 
-/* some toolchains uses a `_' prefix for all user symbols */
-#ifndef MODULE_SYMBOL_PREFIX
+/* Some toolchains use a `_' prefix for all user symbols. */
+#ifdef CONFIG_SYMBOL_PREFIX
+#define MODULE_SYMBOL_PREFIX CONFIG_SYMBOL_PREFIX
+#else
 #define MODULE_SYMBOL_PREFIX ""
 #endif
 
@@ -128,7 +130,10 @@ extern struct module __this_module;
  */
 #define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
 
-/* Author, ideally of form NAME[, NAME]*[ and NAME] */
+/*
+ * Author(s), use "Name <email>" or just "Name", for multiple
+ * authors use multiple MODULE_AUTHOR() statements/lines.
+ */
 #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author)
   
 /* What your module does. */
@@ -170,6 +175,7 @@ struct notifier_block;
 
 #ifdef CONFIG_MODULES
 
+extern int modules_disabled; /* for sysctl */
 /* Get/put a kernel symbol (calls must be symmetric) */
 void *__symbol_get(const char *symbol);
 void *__symbol_get_gpl(const char *symbol);
@@ -308,10 +314,14 @@ struct module
 #endif
 
 #ifdef CONFIG_KALLSYMS
-       /* We keep the symbol and string tables for kallsyms. */
-       Elf_Sym *symtab;
-       unsigned int num_symtab;
-       char *strtab;
+       /*
+        * We keep the symbol and string tables for kallsyms.
+        * The core_* fields below are temporary, loader-only (they
+        * could really be discarded after module init).
+        */
+       Elf_Sym *symtab, *core_symtab;
+       unsigned int num_symtab, core_num_syms;
+       char *strtab, *core_strtab;
 
        /* Section attributes */
        struct module_sect_attrs *sect_attrs;
@@ -354,11 +364,9 @@ struct module
        /* Destruction function. */
        void (*exit)(void);
 
-#ifdef CONFIG_SMP
-       char *refptr;
-#else
-       local_t ref;
-#endif
+       struct module_ref {
+               int count;
+       } __percpu *refptr;
 #endif
 
 #ifdef CONFIG_CONSTRUCTORS
@@ -445,25 +453,16 @@ void __symbol_put(const char *symbol);
 #define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
 void symbol_put_addr(void *addr);
 
-static inline local_t *__module_ref_addr(struct module *mod, int cpu)
-{
-#ifdef CONFIG_SMP
-       return (local_t *) (mod->refptr + per_cpu_offset(cpu));
-#else
-       return &mod->ref;
-#endif
-}
-
 /* Sometimes we know we already have a refcount, and it's easier not
    to handle the error case (which only happens with rmmod --wait). */
 static inline void __module_get(struct module *module)
 {
        if (module) {
-               unsigned int cpu = get_cpu();
-               local_inc(__module_ref_addr(module, cpu));
+               preempt_disable();
+               __this_cpu_inc(module->refptr->count);
                trace_module_get(module, _THIS_IP_,
-                                local_read(__module_ref_addr(module, cpu)));
-               put_cpu();
+                                __this_cpu_read(module->refptr->count));
+               preempt_enable();
        }
 }
 
@@ -472,15 +471,17 @@ static inline int try_module_get(struct module *module)
        int ret = 1;
 
        if (module) {
-               unsigned int cpu = get_cpu();
+               preempt_disable();
+
                if (likely(module_is_live(module))) {
-                       local_inc(__module_ref_addr(module, cpu));
+                       __this_cpu_inc(module->refptr->count);
                        trace_module_get(module, _THIS_IP_,
-                               local_read(__module_ref_addr(module, cpu)));
+                               __this_cpu_read(module->refptr->count));
                }
                else
                        ret = 0;
-               put_cpu();
+
+               preempt_enable();
        }
        return ret;
 }