mmc: at91_mci: cleanup: use MCI_ERRORS

[linux-2.6-omap-h63xx.git] / kernel / module.c

diff --git a/kernel/module.c b/kernel/module.c
index 33c04ad511750bc693410d9866b98dcfa6c2cb3d..a389b423c279dcb6e5f2b94ffcf56e534b06875e 100644 (file)
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -20,6 +20,7 @@
 #include <linux/moduleloader.h>
 #include <linux/init.h>
 #include <linux/kallsyms.h>
+#include <linux/sysfs.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
@@ -692,8 +693,7 @@ sys_delete_module(const char __user *name_user, unsigned int flags)
        }
 
        /* If it has an init func, it must have an exit func to unload */
-       if ((mod->init != NULL && mod->exit == NULL)
-           || mod->unsafe) {
+       if (mod->init && !mod->exit) {
                forced = try_force_unload(flags);
                if (!forced) {
                        /* This module can't be removed */
@@ -741,11 +741,6 @@ static void print_unload_info(struct seq_file *m, struct module *mod)
                seq_printf(m, "%s,", use->module_which_uses->name);
        }
 
-       if (mod->unsafe) {
-               printed_something = 1;
-               seq_printf(m, "[unsafe],");
-       }
-
        if (mod->init != NULL && mod->exit == NULL) {
                printed_something = 1;
                seq_printf(m, "[permanent],");
@@ -784,8 +779,7 @@ EXPORT_SYMBOL_GPL(symbol_put_addr);
 static ssize_t show_refcnt(struct module_attribute *mattr,
                           struct module *mod, char *buffer)
 {
-       /* sysfs holds a reference */
-       return sprintf(buffer, "%u\n", module_refcount(mod)-1);
+       return sprintf(buffer, "%u\n", module_refcount(mod));
 }
 
 static struct module_attribute refcnt = {
@@ -1054,6 +1048,100 @@ static void remove_sect_attrs(struct module *mod)
        }
 }
 
+/*
+ * /sys/module/foo/notes/.section.name gives contents of SHT_NOTE sections.
+ */
+
+struct module_notes_attrs {
+       struct kobject *dir;
+       unsigned int notes;
+       struct bin_attribute attrs[0];
+};
+
+static ssize_t module_notes_read(struct kobject *kobj,
+                                struct bin_attribute *bin_attr,
+                                char *buf, loff_t pos, size_t count)
+{
+       /*
+        * The caller checked the pos and count against our size.
+        */
+       memcpy(buf, bin_attr->private + pos, count);
+       return count;
+}
+
+static void free_notes_attrs(struct module_notes_attrs *notes_attrs,
+                            unsigned int i)
+{
+       if (notes_attrs->dir) {
+               while (i-- > 0)
+                       sysfs_remove_bin_file(notes_attrs->dir,
+                                             &notes_attrs->attrs[i]);
+               kobject_del(notes_attrs->dir);
+       }
+       kfree(notes_attrs);
+}
+
+static void add_notes_attrs(struct module *mod, unsigned int nsect,
+                           char *secstrings, Elf_Shdr *sechdrs)
+{
+       unsigned int notes, loaded, i;
+       struct module_notes_attrs *notes_attrs;
+       struct bin_attribute *nattr;
+
+       /* Count notes sections and allocate structures.  */
+       notes = 0;
+       for (i = 0; i < nsect; i++)
+               if ((sechdrs[i].sh_flags & SHF_ALLOC) &&
+                   (sechdrs[i].sh_type == SHT_NOTE))
+                       ++notes;
+
+       if (notes == 0)
+               return;
+
+       notes_attrs = kzalloc(sizeof(*notes_attrs)
+                             + notes * sizeof(notes_attrs->attrs[0]),
+                             GFP_KERNEL);
+       if (notes_attrs == NULL)
+               return;
+
+       notes_attrs->notes = notes;
+       nattr = &notes_attrs->attrs[0];
+       for (loaded = i = 0; i < nsect; ++i) {
+               if (!(sechdrs[i].sh_flags & SHF_ALLOC))
+                       continue;
+               if (sechdrs[i].sh_type == SHT_NOTE) {
+                       nattr->attr.name = mod->sect_attrs->attrs[loaded].name;
+                       nattr->attr.mode = S_IRUGO;
+                       nattr->size = sechdrs[i].sh_size;
+                       nattr->private = (void *) sechdrs[i].sh_addr;
+                       nattr->read = module_notes_read;
+                       ++nattr;
+               }
+               ++loaded;
+       }
+
+       notes_attrs->dir = kobject_add_dir(&mod->mkobj.kobj, "notes");
+       if (!notes_attrs->dir)
+               goto out;
+
+       for (i = 0; i < notes; ++i)
+               if (sysfs_create_bin_file(notes_attrs->dir,
+                                         &notes_attrs->attrs[i]))
+                       goto out;
+
+       mod->notes_attrs = notes_attrs;
+       return;
+
+  out:
+       free_notes_attrs(notes_attrs, i);
+}
+
+static void remove_notes_attrs(struct module *mod)
+{
+       if (mod->notes_attrs)
+               free_notes_attrs(mod->notes_attrs, mod->notes_attrs->notes);
+}
+
 #else
 
 static inline void add_sect_attrs(struct module *mod, unsigned int nsect,
@@ -1064,6 +1152,15 @@ static inline void add_sect_attrs(struct module *mod, unsigned int nsect,
 static inline void remove_sect_attrs(struct module *mod)
 {
 }
+
+static inline void add_notes_attrs(struct module *mod, unsigned int nsect,
+                                  char *sectstrings, Elf_Shdr *sechdrs)
+{
+}
+
+static inline void remove_notes_attrs(struct module *mod)
+{
+}
 #endif /* CONFIG_KALLSYMS */
 
 #ifdef CONFIG_SYSFS
@@ -1198,6 +1295,7 @@ static void free_module(struct module *mod)
 {
        /* Delete from various lists */
        stop_machine_run(__unlink_module, mod, NR_CPUS);
+       remove_notes_attrs(mod);
        remove_sect_attrs(mod);
        mod_kobject_remove(mod);
 
@@ -1783,7 +1881,8 @@ static struct module *load_module(void __user *umod,
        module_unload_init(mod);
 
        /* Initialize kobject, so we can reference it. */
-       if (mod_sysfs_init(mod) != 0)
+       err = mod_sysfs_init(mod);
+       if (err)
                goto cleanup;
 
        /* Set up license info based on the info section */
@@ -1925,6 +2024,7 @@ static struct module *load_module(void __user *umod,
        if (err < 0)
                goto arch_cleanup;
        add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
+       add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
 
        /* Size of section 0 is 0, so this works well if no unwind info. */
        mod->unwind_info = unwind_add_table(mod,
@@ -2012,15 +2112,10 @@ sys_init_module(void __user *umod,
                    buggy refcounters. */
                mod->state = MODULE_STATE_GOING;
                synchronize_sched();
-               if (mod->unsafe)
-                       printk(KERN_ERR "%s: module is now stuck!\n",
-                              mod->name);
-               else {
-                       module_put(mod);
-                       mutex_lock(&module_mutex);
-                       free_module(mod);
-                       mutex_unlock(&module_mutex);
-               }
+               module_put(mod);
+               mutex_lock(&module_mutex);
+               free_module(mod);
+               mutex_unlock(&module_mutex);
                return ret;
        }