Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2108 insertions, 0 deletions

diff --git a/kernel/module.c b/kernel/module.c
new file mode 100644
index 00000000000..2dbfa0773fa
--- /dev/null
+++ b/kernel/module.c
@@ -0,0 +1,2108 @@
+/* Rewritten by Rusty Russell, on the backs of many others...
+   Copyright (C) 2002 Richard Henderson
+   Copyright (C) 2001 Rusty Russell, 2002 Rusty Russell IBM.
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/moduleloader.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/elf.h>
+#include <linux/seq_file.h>
+#include <linux/syscalls.h>
+#include <linux/fcntl.h>
+#include <linux/rcupdate.h>
+#include <linux/cpu.h>
+#include <linux/moduleparam.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/vermagic.h>
+#include <linux/notifier.h>
+#include <linux/stop_machine.h>
+#include <linux/device.h>
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+#include <asm/cacheflush.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(fmt , a...)
+#endif
+
+#ifndef ARCH_SHF_SMALL
+#define ARCH_SHF_SMALL 0
+#endif
+
+/* If this is set, the section belongs in the init part of the module */
+#define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
+
+/* Protects module list */
+static DEFINE_SPINLOCK(modlist_lock);
+
+/* List of modules, protected by module_mutex AND modlist_lock */
+static DECLARE_MUTEX(module_mutex);
+static LIST_HEAD(modules);
+
+static DECLARE_MUTEX(notify_mutex);
+static struct notifier_block * module_notify_list;
+
+int register_module_notifier(struct notifier_block * nb)
+{
+	int err;
+	down(&notify_mutex);
+	err = notifier_chain_register(&module_notify_list, nb);
+	up(&notify_mutex);
+	return err;
+}
+EXPORT_SYMBOL(register_module_notifier);
+
+int unregister_module_notifier(struct notifier_block * nb)
+{
+	int err;
+	down(&notify_mutex);
+	err = notifier_chain_unregister(&module_notify_list, nb);
+	up(&notify_mutex);
+	return err;
+}
+EXPORT_SYMBOL(unregister_module_notifier);
+
+/* We require a truly strong try_module_get() */
+static inline int strong_try_module_get(struct module *mod)
+{
+	if (mod && mod->state == MODULE_STATE_COMING)
+		return 0;
+	return try_module_get(mod);
+}
+
+/* A thread that wants to hold a reference to a module only while it
+ * is running can call ths to safely exit.
+ * nfsd and lockd use this.
+ */
+void __module_put_and_exit(struct module *mod, long code)
+{
+	module_put(mod);
+	do_exit(code);
+}
+EXPORT_SYMBOL(__module_put_and_exit);
+	
+/* Find a module section: 0 means not found. */
+static unsigned int find_sec(Elf_Ehdr *hdr,
+			     Elf_Shdr *sechdrs,
+			     const char *secstrings,
+			     const char *name)
+{
+	unsigned int i;
+
+	for (i = 1; i < hdr->e_shnum; i++)
+		/* Alloc bit cleared means "ignore it." */
+		if ((sechdrs[i].sh_flags & SHF_ALLOC)
+		    && strcmp(secstrings+sechdrs[i].sh_name, name) == 0)
+			return i;
+	return 0;
+}
+
+/* Provided by the linker */
+extern const struct kernel_symbol __start___ksymtab[];
+extern const struct kernel_symbol __stop___ksymtab[];
+extern const struct kernel_symbol __start___ksymtab_gpl[];
+extern const struct kernel_symbol __stop___ksymtab_gpl[];
+extern const unsigned long __start___kcrctab[];
+extern const unsigned long __start___kcrctab_gpl[];
+
+#ifndef CONFIG_MODVERSIONS
+#define symversion(base, idx) NULL
+#else
+#define symversion(base, idx) ((base) ? ((base) + (idx)) : NULL)
+#endif
+
+/* Find a symbol, return value, crc and module which owns it */
+static unsigned long __find_symbol(const char *name,
+				   struct module **owner,
+				   const unsigned long **crc,
+				   int gplok)
+{
+	struct module *mod;
+	unsigned int i;
+
+	/* Core kernel first. */ 
+	*owner = NULL;
+	for (i = 0; __start___ksymtab+i < __stop___ksymtab; i++) {
+		if (strcmp(__start___ksymtab[i].name, name) == 0) {
+			*crc = symversion(__start___kcrctab, i);
+			return __start___ksymtab[i].value;
+		}
+	}
+	if (gplok) {
+		for (i = 0; __start___ksymtab_gpl+i<__stop___ksymtab_gpl; i++)
+			if (strcmp(__start___ksymtab_gpl[i].name, name) == 0) {
+				*crc = symversion(__start___kcrctab_gpl, i);
+				return __start___ksymtab_gpl[i].value;
+			}
+	}
+
+	/* Now try modules. */ 
+	list_for_each_entry(mod, &modules, list) {
+		*owner = mod;
+		for (i = 0; i < mod->num_syms; i++)
+			if (strcmp(mod->syms[i].name, name) == 0) {
+				*crc = symversion(mod->crcs, i);
+				return mod->syms[i].value;
+			}
+
+		if (gplok) {
+			for (i = 0; i < mod->num_gpl_syms; i++) {
+				if (strcmp(mod->gpl_syms[i].name, name) == 0) {
+					*crc = symversion(mod->gpl_crcs, i);
+					return mod->gpl_syms[i].value;
+				}
+			}
+		}
+	}
+	DEBUGP("Failed to find symbol %s\n", name);
+ 	return 0;
+}
+
+/* Find a symbol in this elf symbol table */
+static unsigned long find_local_symbol(Elf_Shdr *sechdrs,
+				       unsigned int symindex,
+				       const char *strtab,
+				       const char *name)
+{
+	unsigned int i;
+	Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr;
+
+	/* Search (defined) internal symbols first. */
+	for (i = 1; i < sechdrs[symindex].sh_size/sizeof(*sym); i++) {
+		if (sym[i].st_shndx != SHN_UNDEF
+		    && strcmp(name, strtab + sym[i].st_name) == 0)
+			return sym[i].st_value;
+	}
+	return 0;
+}
+
+/* Search for module by name: must hold module_mutex. */
+static struct module *find_module(const char *name)
+{
+	struct module *mod;
+
+	list_for_each_entry(mod, &modules, list) {
+		if (strcmp(mod->name, name) == 0)
+			return mod;
+	}
+	return NULL;
+}
+
+#ifdef CONFIG_SMP
+/* Number of blocks used and allocated. */
+static unsigned int pcpu_num_used, pcpu_num_allocated;
+/* Size of each block.  -ve means used. */
+static int *pcpu_size;
+
+static int split_block(unsigned int i, unsigned short size)
+{
+	/* Reallocation required? */
+	if (pcpu_num_used + 1 > pcpu_num_allocated) {
+		int *new = kmalloc(sizeof(new[0]) * pcpu_num_allocated*2,
+				   GFP_KERNEL);
+		if (!new)
+			return 0;
+
+		memcpy(new, pcpu_size, sizeof(new[0])*pcpu_num_allocated);
+		pcpu_num_allocated *= 2;
+		kfree(pcpu_size);
+		pcpu_size = new;
+	}
+
+	/* Insert a new subblock */
+	memmove(&pcpu_size[i+1], &pcpu_size[i],
+		sizeof(pcpu_size[0]) * (pcpu_num_used - i));
+	pcpu_num_used++;
+
+	pcpu_size[i+1] -= size;
+	pcpu_size[i] = size;
+	return 1;
+}
+
+static inline unsigned int block_size(int val)
+{
+	if (val < 0)
+		return -val;
+	return val;
+}
+
+/* Created by linker magic */
+extern char __per_cpu_start[], __per_cpu_end[];
+
+static void *percpu_modalloc(unsigned long size, unsigned long align)
+{
+	unsigned long extra;
+	unsigned int i;
+	void *ptr;
+
+	BUG_ON(align > SMP_CACHE_BYTES);
+
+	ptr = __per_cpu_start;
+	for (i = 0; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) {
+		/* Extra for alignment requirement. */
+		extra = ALIGN((unsigned long)ptr, align) - (unsigned long)ptr;
+		BUG_ON(i == 0 && extra != 0);
+
+		if (pcpu_size[i] < 0 || pcpu_size[i] < extra + size)
+			continue;
+
+		/* Transfer extra to previous block. */
+		if (pcpu_size[i-1] < 0)
+			pcpu_size[i-1] -= extra;
+		else
+			pcpu_size[i-1] += extra;
+		pcpu_size[i] -= extra;
+		ptr += extra;
+
+		/* Split block if warranted */
+		if (pcpu_size[i] - size > sizeof(unsigned long))
+			if (!split_block(i, size))
+				return NULL;
+
+		/* Mark allocated */
+		pcpu_size[i] = -pcpu_size[i];
+		return ptr;
+	}
+
+	printk(KERN_WARNING "Could not allocate %lu bytes percpu data\n",
+	       size);
+	return NULL;
+}
+
+static void percpu_modfree(void *freeme)
+{
+	unsigned int i;
+	void *ptr = __per_cpu_start + block_size(pcpu_size[0]);
+
+	/* First entry is core kernel percpu data. */
+	for (i = 1; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) {
+		if (ptr == freeme) {
+			pcpu_size[i] = -pcpu_size[i];
+			goto free;
+		}
+	}
+	BUG();
+
+ free:
+	/* Merge with previous? */
+	if (pcpu_size[i-1] >= 0) {
+		pcpu_size[i-1] += pcpu_size[i];
+		pcpu_num_used--;
+		memmove(&pcpu_size[i], &pcpu_size[i+1],
+			(pcpu_num_used - i) * sizeof(pcpu_size[0]));
+		i--;
+	}
+	/* Merge with next? */
+	if (i+1 < pcpu_num_used && pcpu_size[i+1] >= 0) {
+		pcpu_size[i] += pcpu_size[i+1];
+		pcpu_num_used--;
+		memmove(&pcpu_size[i+1], &pcpu_size[i+2],
+			(pcpu_num_used - (i+1)) * sizeof(pcpu_size[0]));
+	}
+}
+
+static unsigned int find_pcpusec(Elf_Ehdr *hdr,
+				 Elf_Shdr *sechdrs,
+				 const char *secstrings)
+{
+	return find_sec(hdr, sechdrs, secstrings, ".data.percpu");
+}
+
+static int percpu_modinit(void)
+{
+	pcpu_num_used = 2;
+	pcpu_num_allocated = 2;
+	pcpu_size = kmalloc(sizeof(pcpu_size[0]) * pcpu_num_allocated,
+			    GFP_KERNEL);
+	/* Static in-kernel percpu data (used). */
+	pcpu_size[0] = -ALIGN(__per_cpu_end-__per_cpu_start, SMP_CACHE_BYTES);
+	/* Free room. */
+	pcpu_size[1] = PERCPU_ENOUGH_ROOM + pcpu_size[0];
+	if (pcpu_size[1] < 0) {
+		printk(KERN_ERR "No per-cpu room for modules.\n");
+		pcpu_num_used = 1;
+	}
+
+	return 0;
+}	
+__initcall(percpu_modinit);
+#else /* ... !CONFIG_SMP */
+static inline void *percpu_modalloc(unsigned long size, unsigned long align)
+{
+	return NULL;
+}
+static inline void percpu_modfree(void *pcpuptr)
+{
+	BUG();
+}
+static inline unsigned int find_pcpusec(Elf_Ehdr *hdr,
+					Elf_Shdr *sechdrs,
+					const char *secstrings)
+{
+	return 0;
+}
+static inline void percpu_modcopy(void *pcpudst, const void *src,
+				  unsigned long size)
+{
+	/* pcpusec should be 0, and size of that section should be 0. */
+	BUG_ON(size != 0);
+}
+#endif /* CONFIG_SMP */
+
+#ifdef CONFIG_MODULE_UNLOAD
+/* Init the unload section of the module. */
+static void module_unload_init(struct module *mod)
+{
+	unsigned int i;
+
+	INIT_LIST_HEAD(&mod->modules_which_use_me);
+	for (i = 0; i < NR_CPUS; i++)
+		local_set(&mod->ref[i].count, 0);
+	/* Hold reference count during initialization. */
+	local_set(&mod->ref[_smp_processor_id()].count, 1);
+	/* Backwards compatibility macros put refcount during init. */
+	mod->waiter = current;
+}
+
+/* modules using other modules */
+struct module_use
+{
+	struct list_head list;
+	struct module *module_which_uses;
+};
+
+/* Does a already use b? */
+static int already_uses(struct module *a, struct module *b)
+{
+	struct module_use *use;
+
+	list_for_each_entry(use, &b->modules_which_use_me, list) {
+		if (use->module_which_uses == a) {
+			DEBUGP("%s uses %s!\n", a->name, b->name);
+			return 1;
+		}
+	}
+	DEBUGP("%s does not use %s!\n", a->name, b->name);
+	return 0;
+}
+
+/* Module a uses b */
+static int use_module(struct module *a, struct module *b)
+{
+	struct module_use *use;
+	if (b == NULL || already_uses(a, b)) return 1;
+
+	if (!strong_try_module_get(b))
+		return 0;
+
+	DEBUGP("Allocating new usage for %s.\n", a->name);
+	use = kmalloc(sizeof(*use), GFP_ATOMIC);
+	if (!use) {
+		printk("%s: out of memory loading\n", a->name);
+		module_put(b);
+		return 0;
+	}
+
+	use->module_which_uses = a;
+	list_add(&use->list, &b->modules_which_use_me);
+	return 1;
+}
+
+/* Clear the unload stuff of the module. */
+static void module_unload_free(struct module *mod)
+{
+	struct module *i;
+
+	list_for_each_entry(i, &modules, list) {
+		struct module_use *use;
+
+		list_for_each_entry(use, &i->modules_which_use_me, list) {
+			if (use->module_which_uses == mod) {
+				DEBUGP("%s unusing %s\n", mod->name, i->name);
+				module_put(i);
+				list_del(&use->list);
+				kfree(use);
+				/* There can be at most one match. */
+				break;
+			}
+		}
+	}
+}
+
+#ifdef CONFIG_MODULE_FORCE_UNLOAD
+static inline int try_force(unsigned int flags)
+{
+	int ret = (flags & O_TRUNC);
+	if (ret)
+		tainted |= TAINT_FORCED_MODULE;
+	return ret;
+}
+#else
+static inline int try_force(unsigned int flags)
+{
+	return 0;
+}
+#endif /* CONFIG_MODULE_FORCE_UNLOAD */
+
+struct stopref
+{
+	struct module *mod;
+	int flags;
+	int *forced;
+};
+
+/* Whole machine is stopped with interrupts off when this runs. */
+static int __try_stop_module(void *_sref)
+{
+	struct stopref *sref = _sref;
+
+	/* If it's not unused, quit unless we are told to block. */
+	if ((sref->flags & O_NONBLOCK) && module_refcount(sref->mod) != 0) {
+		if (!(*sref->forced = try_force(sref->flags)))
+			return -EWOULDBLOCK;
+	}
+
+	/* Mark it as dying. */
+	sref->mod->state = MODULE_STATE_GOING;
+	return 0;
+}
+
+static int try_stop_module(struct module *mod, int flags, int *forced)
+{
+	struct stopref sref = { mod, flags, forced };
+
+	return stop_machine_run(__try_stop_module, &sref, NR_CPUS);
+}
+
+unsigned int module_refcount(struct module *mod)
+{
+	unsigned int i, total = 0;
+
+	for (i = 0; i < NR_CPUS; i++)
+		total += local_read(&mod->ref[i].count);
+	return total;
+}
+EXPORT_SYMBOL(module_refcount);
+
+/* This exists whether we can unload or not */
+static void free_module(struct module *mod);
+
+static void wait_for_zero_refcount(struct module *mod)
+{
+	/* Since we might sleep for some time, drop the semaphore first */
+	up(&module_mutex);
+	for (;;) {
+		DEBUGP("Looking at refcount...\n");
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		if (module_refcount(mod) == 0)
+			break;
+		schedule();
+	}
+	current->state = TASK_RUNNING;
+	down(&module_mutex);
+}
+
+asmlinkage long
+sys_delete_module(const char __user *name_user, unsigned int flags)
+{
+	struct module *mod;
+	char name[MODULE_NAME_LEN];
+	int ret, forced = 0;
+
+	if (!capable(CAP_SYS_MODULE))
+		return -EPERM;
+
+	if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0)
+		return -EFAULT;
+	name[MODULE_NAME_LEN-1] = '\0';
+
+	if (down_interruptible(&module_mutex) != 0)
+		return -EINTR;
+
+	mod = find_module(name);
+	if (!mod) {
+		ret = -ENOENT;
+		goto out;
+	}
+
+	if (!list_empty(&mod->modules_which_use_me)) {
+		/* Other modules depend on us: get rid of them first. */
+		ret = -EWOULDBLOCK;
+		goto out;
+	}
+
+	/* Doing init or already dying? */
+	if (mod->state != MODULE_STATE_LIVE) {
+		/* FIXME: if (force), slam module count and wake up
+                   waiter --RR */
+		DEBUGP("%s already dying\n", mod->name);
+		ret = -EBUSY;
+		goto out;
+	}
+
+	/* If it has an init func, it must have an exit func to unload */
+	if ((mod->init != NULL && mod->exit == NULL)
+	    || mod->unsafe) {
+		forced = try_force(flags);
+		if (!forced) {
+			/* This module can't be removed */
+			ret = -EBUSY;
+			goto out;
+		}
+	}
+
+	/* Set this up before setting mod->state */
+	mod->waiter = current;
+
+	/* Stop the machine so refcounts can't move and disable module. */
+	ret = try_stop_module(mod, flags, &forced);
+	if (ret != 0)
+		goto out;
+
+	/* Never wait if forced. */
+	if (!forced && module_refcount(mod) != 0)
+		wait_for_zero_refcount(mod);
+
+	/* Final destruction now noone is using it. */
+	if (mod->exit != NULL) {
+		up(&module_mutex);
+		mod->exit();
+		down(&module_mutex);
+	}
+	free_module(mod);
+
+ out:
+	up(&module_mutex);
+	return ret;
+}
+
+static void print_unload_info(struct seq_file *m, struct module *mod)
+{
+	struct module_use *use;
+	int printed_something = 0;
+
+	seq_printf(m, " %u ", module_refcount(mod));
+
+	/* Always include a trailing , so userspace can differentiate
+           between this and the old multi-field proc format. */
+	list_for_each_entry(use, &mod->modules_which_use_me, list) {
+		printed_something = 1;
+		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],");
+	}
+
+	if (!printed_something)
+		seq_printf(m, "-");
+}
+
+void __symbol_put(const char *symbol)
+{
+	struct module *owner;
+	unsigned long flags;
+	const unsigned long *crc;
+
+	spin_lock_irqsave(&modlist_lock, flags);
+	if (!__find_symbol(symbol, &owner, &crc, 1))
+		BUG();
+	module_put(owner);
+	spin_unlock_irqrestore(&modlist_lock, flags);
+}
+EXPORT_SYMBOL(__symbol_put);
+
+void symbol_put_addr(void *addr)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&modlist_lock, flags);
+	if (!kernel_text_address((unsigned long)addr))
+		BUG();
+
+	module_put(module_text_address((unsigned long)addr));
+	spin_unlock_irqrestore(&modlist_lock, flags);
+}
+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);
+}
+
+static struct module_attribute refcnt = {
+	.attr = { .name = "refcnt", .mode = 0444, .owner = THIS_MODULE },
+	.show = show_refcnt,
+};
+
+#else /* !CONFIG_MODULE_UNLOAD */
+static void print_unload_info(struct seq_file *m, struct module *mod)
+{
+	/* We don't know the usage count, or what modules are using. */
+	seq_printf(m, " - -");
+}
+
+static inline void module_unload_free(struct module *mod)
+{
+}
+
+static inline int use_module(struct module *a, struct module *b)
+{
+	return strong_try_module_get(b);
+}
+
+static inline void module_unload_init(struct module *mod)
+{
+}
+#endif /* CONFIG_MODULE_UNLOAD */
+
+#ifdef CONFIG_OBSOLETE_MODPARM
+/* Bounds checking done below */
+static int obsparm_copy_string(const char *val, struct kernel_param *kp)
+{
+	strcpy(kp->arg, val);
+	return 0;
+}
+
+int set_obsolete(const char *val, struct kernel_param *kp)
+{
+	unsigned int min, max;
+	unsigned int size, maxsize;
+	int dummy;
+	char *endp;
+	const char *p;
+	struct obsolete_modparm *obsparm = kp->arg;
+
+	if (!val) {
+		printk(KERN_ERR "Parameter %s needs an argument\n", kp->name);
+		return -EINVAL;
+	}
+
+	/* type is: [min[-max]]{b,h,i,l,s} */
+	p = obsparm->type;
+	min = simple_strtol(p, &endp, 10);
+	if (endp == obsparm->type)
+		min = max = 1;
+	else if (*endp == '-') {
+		p = endp+1;
+		max = simple_strtol(p, &endp, 10);
+	} else
+		max = min;
+	switch (*endp) {
+	case 'b':
+		return param_array(kp->name, val, min, max, obsparm->addr,
+				   1, param_set_byte, &dummy);
+	case 'h':
+		return param_array(kp->name, val, min, max, obsparm->addr,
+				   sizeof(short), param_set_short, &dummy);
+	case 'i':
+		return param_array(kp->name, val, min, max, obsparm->addr,
+				   sizeof(int), param_set_int, &dummy);
+	case 'l':
+		return param_array(kp->name, val, min, max, obsparm->addr,
+				   sizeof(long), param_set_long, &dummy);
+	case 's':
+		return param_array(kp->name, val, min, max, obsparm->addr,
+				   sizeof(char *), param_set_charp, &dummy);
+
+	case 'c':
+		/* Undocumented: 1-5c50 means 1-5 strings of up to 49 chars,
+		   and the decl is "char xxx[5][50];" */
+		p = endp+1;
+		maxsize = simple_strtol(p, &endp, 10);
+		/* We check lengths here (yes, this is a hack). */
+		p = val;
+		while (p[size = strcspn(p, ",")]) {
+			if (size >= maxsize) 
+				goto oversize;
+			p += size+1;
+		}
+		if (size >= maxsize) 
+			goto oversize;
+		return param_array(kp->name, val, min, max, obsparm->addr,
+				   maxsize, obsparm_copy_string, &dummy);
+	}
+	printk(KERN_ERR "Unknown obsolete parameter type %s\n", obsparm->type);
+	return -EINVAL;
+ oversize:
+	printk(KERN_ERR
+	       "Parameter %s doesn't fit in %u chars.\n", kp->name, maxsize);
+	return -EINVAL;
+}
+
+static int obsolete_params(const char *name,
+			   char *args,
+			   struct obsolete_modparm obsparm[],
+			   unsigned int num,
+			   Elf_Shdr *sechdrs,
+			   unsigned int symindex,
+			   const char *strtab)
+{
+	struct kernel_param *kp;
+	unsigned int i;
+	int ret;
+
+	kp = kmalloc(sizeof(kp[0]) * num, GFP_KERNEL);
+	if (!kp)
+		return -ENOMEM;
+
+	for (i = 0; i < num; i++) {
+		char sym_name[128 + sizeof(MODULE_SYMBOL_PREFIX)];
+
+		snprintf(sym_name, sizeof(sym_name), "%s%s",
+			 MODULE_SYMBOL_PREFIX, obsparm[i].name);
+
+		kp[i].name = obsparm[i].name;
+		kp[i].perm = 000;
+		kp[i].set = set_obsolete;
+		kp[i].get = NULL;
+		obsparm[i].addr
+			= (void *)find_local_symbol(sechdrs, symindex, strtab,
+						    sym_name);
+		if (!obsparm[i].addr) {
+			printk("%s: falsely claims to have parameter %s\n",
+			       name, obsparm[i].name);
+			ret = -EINVAL;
+			goto out;
+		}
+		kp[i].arg = &obsparm[i];
+	}
+
+	ret = parse_args(name, args, kp, num, NULL);
+ out:
+	kfree(kp);
+	return ret;
+}
+#else
+static int obsolete_params(const char *name,
+			   char *args,
+			   struct obsolete_modparm obsparm[],
+			   unsigned int num,
+			   Elf_Shdr *sechdrs,
+			   unsigned int symindex,
+			   const char *strtab)
+{
+	if (num != 0)
+		printk(KERN_WARNING "%s: Ignoring obsolete parameters\n",
+		       name);
+	return 0;
+}
+#endif /* CONFIG_OBSOLETE_MODPARM */
+
+static const char vermagic[] = VERMAGIC_STRING;
+
+#ifdef CONFIG_MODVERSIONS
+static int check_version(Elf_Shdr *sechdrs,
+			 unsigned int versindex,
+			 const char *symname,
+			 struct module *mod, 
+			 const unsigned long *crc)
+{
+	unsigned int i, num_versions;
+	struct modversion_info *versions;
+
+	/* Exporting module didn't supply crcs?  OK, we're already tainted. */
+	if (!crc)
+		return 1;
+
+	versions = (void *) sechdrs[versindex].sh_addr;
+	num_versions = sechdrs[versindex].sh_size
+		/ sizeof(struct modversion_info);
+
+	for (i = 0; i < num_versions; i++) {
+		if (strcmp(versions[i].name, symname) != 0)
+			continue;
+
+		if (versions[i].crc == *crc)
+			return 1;
+		printk("%s: disagrees about version of symbol %s\n",
+		       mod->name, symname);
+		DEBUGP("Found checksum %lX vs module %lX\n",
+		       *crc, versions[i].crc);
+		return 0;
+	}
+	/* Not in module's version table.  OK, but that taints the kernel. */
+	if (!(tainted & TAINT_FORCED_MODULE)) {
+		printk("%s: no version for \"%s\" found: kernel tainted.\n",
+		       mod->name, symname);
+		tainted |= TAINT_FORCED_MODULE;
+	}
+	return 1;
+}
+
+static inline int check_modstruct_version(Elf_Shdr *sechdrs,
+					  unsigned int versindex,
+					  struct module *mod)
+{
+	const unsigned long *crc;
+	struct module *owner;
+
+	if (!__find_symbol("struct_module", &owner, &crc, 1))
+		BUG();
+	return check_version(sechdrs, versindex, "struct_module", mod,
+			     crc);
+}
+
+/* First part is kernel version, which we ignore. */
+static inline int same_magic(const char *amagic, const char *bmagic)
+{
+	amagic += strcspn(amagic, " ");
+	bmagic += strcspn(bmagic, " ");
+	return strcmp(amagic, bmagic) == 0;
+}
+#else
+static inline int check_version(Elf_Shdr *sechdrs,
+				unsigned int versindex,
+				const char *symname,
+				struct module *mod, 
+				const unsigned long *crc)
+{
+	return 1;
+}
+
+static inline int check_modstruct_version(Elf_Shdr *sechdrs,
+					  unsigned int versindex,
+					  struct module *mod)
+{
+	return 1;
+}
+
+static inline int same_magic(const char *amagic, const char *bmagic)
+{
+	return strcmp(amagic, bmagic) == 0;
+}
+#endif /* CONFIG_MODVERSIONS */
+
+/* Resolve a symbol for this module.  I.e. if we find one, record usage.
+   Must be holding module_mutex. */
+static unsigned long resolve_symbol(Elf_Shdr *sechdrs,
+				    unsigned int versindex,
+				    const char *name,
+				    struct module *mod)
+{
+	struct module *owner;
+	unsigned long ret;
+	const unsigned long *crc;
+
+	spin_lock_irq(&modlist_lock);
+	ret = __find_symbol(name, &owner, &crc, mod->license_gplok);
+	if (ret) {
+		/* use_module can fail due to OOM, or module unloading */
+		if (!check_version(sechdrs, versindex, name, mod, crc) ||
+		    !use_module(mod, owner))
+			ret = 0;
+	}
+	spin_unlock_irq(&modlist_lock);
+	return ret;
+}
+
+
+/*
+ * /sys/module/foo/sections stuff
+ * J. Corbet <corbet@lwn.net>
+ */
+#ifdef CONFIG_KALLSYMS
+static ssize_t module_sect_show(struct module_attribute *mattr,
+				struct module *mod, char *buf)
+{
+	struct module_sect_attr *sattr =
+		container_of(mattr, struct module_sect_attr, mattr);
+	return sprintf(buf, "0x%lx\n", sattr->address);
+}
+
+static void add_sect_attrs(struct module *mod, unsigned int nsect,
+		char *secstrings, Elf_Shdr *sechdrs)
+{
+	unsigned int nloaded = 0, i, size[2];
+	struct module_sect_attrs *sect_attrs;
+	struct module_sect_attr *sattr;
+	struct attribute **gattr;
+	
+	/* Count loaded sections and allocate structures */
+	for (i = 0; i < nsect; i++)
+		if (sechdrs[i].sh_flags & SHF_ALLOC)
+			nloaded++;
+	size[0] = ALIGN(sizeof(*sect_attrs)
+			+ nloaded * sizeof(sect_attrs->attrs[0]),
+			sizeof(sect_attrs->grp.attrs[0]));
+	size[1] = (nloaded + 1) * sizeof(sect_attrs->grp.attrs[0]);
+	if (! (sect_attrs = kmalloc(size[0] + size[1], GFP_KERNEL)))
+		return;
+
+	/* Setup section attributes. */
+	sect_attrs->grp.name = "sections";
+	sect_attrs->grp.attrs = (void *)sect_attrs + size[0];
+
+	sattr = &sect_attrs->attrs[0];
+	gattr = &sect_attrs->grp.attrs[0];
+	for (i = 0; i < nsect; i++) {
+		if (! (sechdrs[i].sh_flags & SHF_ALLOC))
+			continue;
+		sattr->address = sechdrs[i].sh_addr;
+		strlcpy(sattr->name, secstrings + sechdrs[i].sh_name,
+			MODULE_SECT_NAME_LEN);
+		sattr->mattr.show = module_sect_show;
+		sattr->mattr.store = NULL;
+		sattr->mattr.attr.name = sattr->name;
+		sattr->mattr.attr.owner = mod;
+		sattr->mattr.attr.mode = S_IRUGO;
+		*(gattr++) = &(sattr++)->mattr.attr;
+	}
+	*gattr = NULL;
+
+	if (sysfs_create_group(&mod->mkobj.kobj, &sect_attrs->grp))
+		goto out;
+
+	mod->sect_attrs = sect_attrs;
+	return;
+  out:
+	kfree(sect_attrs);
+}
+
+static void remove_sect_attrs(struct module *mod)
+{
+	if (mod->sect_attrs) {
+		sysfs_remove_group(&mod->mkobj.kobj,
+				   &mod->sect_attrs->grp);
+		/* We are positive that no one is using any sect attrs
+		 * at this point.  Deallocate immediately. */
+		kfree(mod->sect_attrs);
+		mod->sect_attrs = NULL;
+	}
+}
+
+
+#else
+static inline void add_sect_attrs(struct module *mod, unsigned int nsect,
+		char *sectstrings, Elf_Shdr *sechdrs)
+{
+}
+
+static inline void remove_sect_attrs(struct module *mod)
+{
+}
+#endif /* CONFIG_KALLSYMS */
+
+
+#ifdef CONFIG_MODULE_UNLOAD
+static inline int module_add_refcnt_attr(struct module *mod)
+{
+	return sysfs_create_file(&mod->mkobj.kobj, &refcnt.attr);
+}
+static void module_remove_refcnt_attr(struct module *mod)
+{
+	return sysfs_remove_file(&mod->mkobj.kobj, &refcnt.attr);
+}
+#else
+static inline int module_add_refcnt_attr(struct module *mod)
+{
+	return 0;
+}
+static void module_remove_refcnt_attr(struct module *mod)
+{
+}
+#endif
+
+
+static int mod_sysfs_setup(struct module *mod,
+			   struct kernel_param *kparam,
+			   unsigned int num_params)
+{
+	int err;
+
+	memset(&mod->mkobj.kobj, 0, sizeof(mod->mkobj.kobj));
+	err = kobject_set_name(&mod->mkobj.kobj, "%s", mod->name);
+	if (err)
+		goto out;
+	kobj_set_kset_s(&mod->mkobj, module_subsys);
+	mod->mkobj.mod = mod;
+	err = kobject_register(&mod->mkobj.kobj);
+	if (err)
+		goto out;
+
+	err = module_add_refcnt_attr(mod);
+	if (err)
+		goto out_unreg;
+
+	err = module_param_sysfs_setup(mod, kparam, num_params);
+	if (err)
+		goto out_unreg;
+
+	return 0;
+
+out_unreg:
+	kobject_unregister(&mod->mkobj.kobj);
+out:
+	return err;
+}
+
+static void mod_kobject_remove(struct module *mod)
+{
+	module_remove_refcnt_attr(mod);
+	module_param_sysfs_remove(mod);
+
+	kobject_unregister(&mod->mkobj.kobj);
+}
+
+/*
+ * unlink the module with the whole machine is stopped with interrupts off
+ * - this defends against kallsyms not taking locks
+ */
+static int __unlink_module(void *_mod)
+{
+	struct module *mod = _mod;
+	list_del(&mod->list);
+	return 0;
+}
+
+/* Free a module, remove from lists, etc (must hold module mutex). */
+static void free_module(struct module *mod)
+{
+	/* Delete from various lists */
+	stop_machine_run(__unlink_module, mod, NR_CPUS);
+	remove_sect_attrs(mod);
+	mod_kobject_remove(mod);
+
+	/* Arch-specific cleanup. */
+	module_arch_cleanup(mod);
+
+	/* Module unload stuff */
+	module_unload_free(mod);
+
+	/* This may be NULL, but that's OK */
+	module_free(mod, mod->module_init);
+	kfree(mod->args);
+	if (mod->percpu)
+		percpu_modfree(mod->percpu);
+
+	/* Finally, free the core (containing the module structure) */
+	module_free(mod, mod->module_core);
+}
+
+void *__symbol_get(const char *symbol)
+{
+	struct module *owner;
+	unsigned long value, flags;
+	const unsigned long *crc;
+
+	spin_lock_irqsave(&modlist_lock, flags);
+	value = __find_symbol(symbol, &owner, &crc, 1);
+	if (value && !strong_try_module_get(owner))
+		value = 0;
+	spin_unlock_irqrestore(&modlist_lock, flags);
+
+	return (void *)value;
+}
+EXPORT_SYMBOL_GPL(__symbol_get);
+
+/* Change all symbols so that sh_value encodes the pointer directly. */
+static int simplify_symbols(Elf_Shdr *sechdrs,
+			    unsigned int symindex,
+			    const char *strtab,
+			    unsigned int versindex,
+			    unsigned int pcpuindex,
+			    struct module *mod)
+{
+	Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr;
+	unsigned long secbase;
+	unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym);
+	int ret = 0;
+
+	for (i = 1; i < n; i++) {
+		switch (sym[i].st_shndx) {
+		case SHN_COMMON:
+			/* We compiled with -fno-common.  These are not
+			   supposed to happen.  */
+			DEBUGP("Common symbol: %s\n", strtab + sym[i].st_name);
+			printk("%s: please compile with -fno-common\n",
+			       mod->name);
+			ret = -ENOEXEC;
+			break;
+
+		case SHN_ABS:
+			/* Don't need to do anything */
+			DEBUGP("Absolute symbol: 0x%08lx\n",
+			       (long)sym[i].st_value);
+			break;
+
+		case SHN_UNDEF:
+			sym[i].st_value
+			  = resolve_symbol(sechdrs, versindex,
+					   strtab + sym[i].st_name, mod);
+
+			/* Ok if resolved.  */
+			if (sym[i].st_value != 0)
+				break;
+			/* Ok if weak.  */
+			if (ELF_ST_BIND(sym[i].st_info) == STB_WEAK)
+				break;
+
+			printk(KERN_WARNING "%s: Unknown symbol %s\n",
+			       mod->name, strtab + sym[i].st_name);
+			ret = -ENOENT;
+			break;
+
+		default:
+			/* Divert to percpu allocation if a percpu var. */
+			if (sym[i].st_shndx == pcpuindex)
+				secbase = (unsigned long)mod->percpu;
+			else
+				secbase = sechdrs[sym[i].st_shndx].sh_addr;
+			sym[i].st_value += secbase;
+			break;
+		}
+	}
+
+	return ret;
+}
+
+/* Update size with this section: return offset. */
+static long get_offset(unsigned long *size, Elf_Shdr *sechdr)
+{
+	long ret;
+
+	ret = ALIGN(*size, sechdr->sh_addralign ?: 1);
+	*size = ret + sechdr->sh_size;
+	return ret;
+}
+
+/* Lay out the SHF_ALLOC sections in a way not dissimilar to how ld
+   might -- code, read-only data, read-write data, small data.  Tally
+   sizes, and place the offsets into sh_entsize fields: high bit means it
+   belongs in init. */
+static void layout_sections(struct module *mod,
+			    const Elf_Ehdr *hdr,
+			    Elf_Shdr *sechdrs,
+			    const char *secstrings)
+{
+	static unsigned long const masks[][2] = {
+		/* NOTE: all executable code must be the first section
+		 * in this array; otherwise modify the text_size