Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...

[~andy/linux] / include / linux / module.h

diff --git a/include/linux/module.h b/include/linux/module.h
index 863921637d9fc1eba5b0ebeb63eb90b7ec84144c..4598bf03e98b83756f4f8ecb5b4acdfafec379ad 100644 (file)
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -16,6 +16,7 @@
 #include <linux/kobject.h>
 #include <linux/moduleparam.h>
 #include <linux/tracepoint.h>
+#include <linux/export.h>
 
 #include <linux/percpu.h>
 #include <asm/module.h>
@@ -25,21 +26,8 @@
 /* Not Yet Implemented */
 #define MODULE_SUPPORTED_DEVICE(name)
 
-/* 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
-
 #define MODULE_NAME_LEN MAX_PARAM_PREFIX_LEN
 
-struct kernel_symbol
-{
-       unsigned long value;
-       const char *name;
-};
-
 struct modversion_info
 {
        unsigned long crc;
@@ -98,11 +86,8 @@ void trim_init_extable(struct module *m);
 extern const struct gtype##_id __mod_##gtype##_table           \
   __attribute__ ((unused, alias(__stringify(name))))
 
-extern struct module __this_module;
-#define THIS_MODULE (&__this_module)
 #else  /* !MODULE */
 #define MODULE_GENERIC_TABLE(gtype,name)
-#define THIS_MODULE ((struct module *)0)
 #endif
 
 /* Generic info of form tag = "info" */
@@ -150,11 +135,6 @@ extern struct module __this_module;
 /* What your module does. */
 #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description)
 
-/* One for each parameter, describing how to use it.  Some files do
-   multiple of these per line, so can't just use MODULE_INFO. */
-#define MODULE_PARM_DESC(_parm, desc) \
-       __MODULE_INFO(parm, _parm, #_parm ":" desc)
-
 #define MODULE_DEVICE_TABLE(type,name)         \
   MODULE_GENERIC_TABLE(type##_device,name)
 
@@ -218,52 +198,6 @@ struct module_use {
        struct module *source, *target;
 };
 
-#ifndef __GENKSYMS__
-#ifdef CONFIG_MODVERSIONS
-/* Mark the CRC weak since genksyms apparently decides not to
- * generate a checksums for some symbols */
-#define __CRC_SYMBOL(sym, sec)                                 \
-       extern void *__crc_##sym __attribute__((weak));         \
-       static const unsigned long __kcrctab_##sym              \
-       __used                                                  \
-       __attribute__((section("___kcrctab" sec "+" #sym), unused))     \
-       = (unsigned long) &__crc_##sym;
-#else
-#define __CRC_SYMBOL(sym, sec)
-#endif
-
-/* For every exported symbol, place a struct in the __ksymtab section */
-#define __EXPORT_SYMBOL(sym, sec)                              \
-       extern typeof(sym) sym;                                 \
-       __CRC_SYMBOL(sym, sec)                                  \
-       static const char __kstrtab_##sym[]                     \
-       __attribute__((section("__ksymtab_strings"), aligned(1))) \
-       = MODULE_SYMBOL_PREFIX #sym;                            \
-       static const struct kernel_symbol __ksymtab_##sym       \
-       __used                                                  \
-       __attribute__((section("___ksymtab" sec "+" #sym), unused))     \
-       = { (unsigned long)&sym, __kstrtab_##sym }
-
-#define EXPORT_SYMBOL(sym)                                     \
-       __EXPORT_SYMBOL(sym, "")
-
-#define EXPORT_SYMBOL_GPL(sym)                                 \
-       __EXPORT_SYMBOL(sym, "_gpl")
-
-#define EXPORT_SYMBOL_GPL_FUTURE(sym)                          \
-       __EXPORT_SYMBOL(sym, "_gpl_future")
-
-
-#ifdef CONFIG_UNUSED_SYMBOLS
-#define EXPORT_UNUSED_SYMBOL(sym) __EXPORT_SYMBOL(sym, "_unused")
-#define EXPORT_UNUSED_SYMBOL_GPL(sym) __EXPORT_SYMBOL(sym, "_unused_gpl")
-#else
-#define EXPORT_UNUSED_SYMBOL(sym)
-#define EXPORT_UNUSED_SYMBOL_GPL(sym)
-#endif
-
-#endif
-
 enum module_state
 {
        MODULE_STATE_LIVE,
@@ -271,6 +205,20 @@ enum module_state
        MODULE_STATE_GOING,
 };
 
+/**
+ * struct module_ref - per cpu module reference counts
+ * @incs: number of module get on this cpu
+ * @decs: number of module put on this cpu
+ *
+ * We force an alignment on 8 or 16 bytes, so that alloc_percpu()
+ * put @incs/@decs in same cache line, with no extra memory cost,
+ * since alloc_percpu() is fine grained.
+ */
+struct module_ref {
+       unsigned long incs;
+       unsigned long decs;
+} __attribute((aligned(2 * sizeof(unsigned long))));
+
 struct module
 {
        enum module_state state;
@@ -413,10 +361,7 @@ struct module
        /* Destruction function. */
        void (*exit)(void);
 
-       struct module_ref {
-               unsigned int incs;
-               unsigned int decs;
-       } __percpu *refptr;
+       struct module_ref __percpu *refptr;
 #endif
 
 #ifdef CONFIG_CONSTRUCTORS
@@ -500,7 +445,7 @@ extern void __module_put_and_exit(struct module *mod, long code)
 #define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
 
 #ifdef CONFIG_MODULE_UNLOAD
-unsigned int module_refcount(struct module *mod);
+unsigned long module_refcount(struct module *mod);
 void __symbol_put(const char *symbol);
 #define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
 void symbol_put_addr(void *addr);
@@ -581,11 +526,6 @@ int unregister_module_notifier(struct notifier_block * nb);
 extern void print_modules(void);
 
 #else /* !CONFIG_MODULES... */
-#define EXPORT_SYMBOL(sym)
-#define EXPORT_SYMBOL_GPL(sym)
-#define EXPORT_SYMBOL_GPL_FUTURE(sym)
-#define EXPORT_UNUSED_SYMBOL(sym)
-#define EXPORT_UNUSED_SYMBOL_GPL(sym)
 
 /* Given an address, look for it in the exception tables. */
 static inline const struct exception_table_entry *