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Date: Sat, 30 Oct 2010 16:58:22 -0700
From: Joe Perches <joe@...ches.com>
To: linux-kernel@...r.kernel.org
Cc: Rusty Russell <rusty@...tcorp.com.au>
Subject: [PATCH 2/2] kernel/module.c: Use pr_debug and other neatening
Use <linux/foo> not <asm/foo>
Convert DEBUGP to pr_debug
Use 0x%llx and (unsigned long long)shdr->sh_addr
Remove static initializations to 0
checkpatch whitespace cleanups
Use temporary for sym[i].st_shndx
Move const after static
Hoist assigns from ifs
Signed-off-by: Joe Perches <joe@...ches.com>
---
kernel/module.c | 197 ++++++++++++++++++++++++++++---------------------------
1 files changed, 100 insertions(+), 97 deletions(-)
diff --git a/kernel/module.c b/kernel/module.c
index 9b6b0da..d3fe6c5 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -48,9 +48,9 @@
#include <linux/string.h>
#include <linux/mutex.h>
#include <linux/rculist.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <asm/cacheflush.h>
-#include <asm/mmu_context.h>
+#include <linux/mmu_context.h>
#include <linux/license.h>
#include <asm/sections.h>
#include <linux/tracepoint.h>
@@ -63,12 +63,6 @@
#define CREATE_TRACE_POINTS
#include <trace/events/module.h>
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(fmt , a...)
-#endif
-
#ifndef ARCH_SHF_SMALL
#define ARCH_SHF_SMALL 0
#endif
@@ -91,7 +85,7 @@ struct list_head *kdb_modules = &modules; /* kdb needs the list of modules */
/* Block module loading/unloading? */
-int modules_disabled = 0;
+int modules_disabled;
/* Waiting for a module to finish initializing? */
static DECLARE_WAIT_QUEUE_HEAD(module_wq);
@@ -100,15 +94,16 @@ static BLOCKING_NOTIFIER_HEAD(module_notify_list);
/* Bounds of module allocation, for speeding __module_address.
* Protected by module_mutex. */
-static unsigned long module_addr_min = -1UL, module_addr_max = 0;
+static unsigned long module_addr_min = -1UL;
+static unsigned long module_addr_max;
-int register_module_notifier(struct notifier_block * nb)
+int register_module_notifier(struct notifier_block *nb)
{
return blocking_notifier_chain_register(&module_notify_list, nb);
}
EXPORT_SYMBOL(register_module_notifier);
-int unregister_module_notifier(struct notifier_block * nb)
+int unregister_module_notifier(struct notifier_block *nb)
{
return blocking_notifier_chain_unregister(&module_notify_list, nb);
}
@@ -165,8 +160,8 @@ static unsigned int find_sec(const struct load_info *info, const char *name)
for (i = 1; i < info->hdr->e_shnum; i++) {
Elf_Shdr *shdr = &info->sechdrs[i];
/* Alloc bit cleared means "ignore it." */
- if ((shdr->sh_flags & SHF_ALLOC)
- && strcmp(info->secstrings + shdr->sh_name, name) == 0)
+ if ((shdr->sh_flags & SHF_ALLOC) &&
+ strcmp(info->secstrings + shdr->sh_name, name) == 0)
return i;
}
return 0;
@@ -361,7 +356,7 @@ const struct kernel_symbol *find_symbol(const char *name,
return fsa.sym;
}
- DEBUGP("Failed to find symbol %s\n", name);
+ pr_debug("Failed to find symbol %s\n", name);
return NULL;
}
EXPORT_SYMBOL_GPL(find_symbol);
@@ -489,31 +484,31 @@ bool is_module_percpu_address(unsigned long addr)
#endif /* CONFIG_SMP */
-#define MODINFO_ATTR(field) \
-static void setup_modinfo_##field(struct module *mod, const char *s) \
-{ \
- mod->field = kstrdup(s, GFP_KERNEL); \
-} \
-static ssize_t show_modinfo_##field(struct module_attribute *mattr, \
- struct module *mod, char *buffer) \
-{ \
- return sprintf(buffer, "%s\n", mod->field); \
-} \
-static int modinfo_##field##_exists(struct module *mod) \
-{ \
- return mod->field != NULL; \
-} \
-static void free_modinfo_##field(struct module *mod) \
-{ \
- kfree(mod->field); \
- mod->field = NULL; \
-} \
-static struct module_attribute modinfo_##field = { \
- .attr = { .name = __stringify(field), .mode = 0444 }, \
- .show = show_modinfo_##field, \
- .setup = setup_modinfo_##field, \
- .test = modinfo_##field##_exists, \
- .free = free_modinfo_##field, \
+#define MODINFO_ATTR(field) \
+static void setup_modinfo_##field(struct module *mod, const char *s) \
+{ \
+ mod->field = kstrdup(s, GFP_KERNEL); \
+} \
+static ssize_t show_modinfo_##field(struct module_attribute *mattr, \
+ struct module *mod, char *buffer) \
+{ \
+ return sprintf(buffer, "%s\n", mod->field); \
+} \
+static int modinfo_##field##_exists(struct module *mod) \
+{ \
+ return mod->field != NULL; \
+} \
+static void free_modinfo_##field(struct module *mod) \
+{ \
+ kfree(mod->field); \
+ mod->field = NULL; \
+} \
+static struct module_attribute modinfo_##field = { \
+ .attr = { .name = __stringify(field), .mode = 0444 }, \
+ .show = show_modinfo_##field, \
+ .setup = setup_modinfo_##field, \
+ .test = modinfo_##field##_exists, \
+ .free = free_modinfo_##field, \
};
MODINFO_ATTR(version);
@@ -550,11 +545,11 @@ static int already_uses(struct module *a, struct module *b)
list_for_each_entry(use, &b->source_list, source_list) {
if (use->source == a) {
- DEBUGP("%s uses %s!\n", a->name, b->name);
+ pr_debug("%s uses %s!\n", a->name, b->name);
return 1;
}
}
- DEBUGP("%s does not use %s!\n", a->name, b->name);
+ pr_debug("%s does not use %s!\n", a->name, b->name);
return 0;
}
@@ -569,7 +564,7 @@ static int add_module_usage(struct module *a, struct module *b)
{
struct module_use *use;
- DEBUGP("Allocating new usage for %s.\n", a->name);
+ pr_debug("Allocating new usage for %s\n", a->name);
use = kmalloc(sizeof(*use), GFP_ATOMIC);
if (!use) {
pr_warn("%s: out of memory loading\n", a->name);
@@ -613,7 +608,7 @@ static void module_unload_free(struct module *mod)
mutex_lock(&module_mutex);
list_for_each_entry_safe(use, tmp, &mod->target_list, target_list) {
struct module *i = use->target;
- DEBUGP("%s unusing %s\n", mod->name, i->name);
+ pr_debug("%s unusing %s\n", mod->name, i->name);
module_put(i);
list_del(&use->source_list);
list_del(&use->target_list);
@@ -639,8 +634,7 @@ static inline int try_force_unload(unsigned int flags)
}
#endif /* CONFIG_MODULE_FORCE_UNLOAD */
-struct stopref
-{
+struct stopref {
struct module *mod;
int flags;
int *forced;
@@ -653,7 +647,8 @@ static int __try_stop_module(void *_sref)
/* If it's not unused, quit unless we're forcing. */
if (module_refcount(sref->mod) != 0) {
- if (!(*sref->forced = try_force_unload(sref->flags)))
+ *sref->forced = try_force_unload(sref->flags);
+ if (!*sref->forced)
return -EWOULDBLOCK;
}
@@ -711,7 +706,7 @@ static void wait_for_zero_refcount(struct module *mod)
/* Since we might sleep for some time, release the mutex first */
mutex_unlock(&module_mutex);
for (;;) {
- DEBUGP("Looking at refcount...\n");
+ pr_debug("Looking at refcount...\n");
set_current_state(TASK_UNINTERRUPTIBLE);
if (module_refcount(mod) == 0)
break;
@@ -753,8 +748,8 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user,
/* 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);
+ * waiter --RR */
+ pr_debug("%s already dying\n", mod->name);
ret = -EBUSY;
goto out;
}
@@ -807,7 +802,7 @@ static inline void print_unload_info(struct seq_file *m, struct module *mod)
seq_printf(m, " %u ", module_refcount(mod));
/* Always include a trailing , so userspace can differentiate
- between this and the old multi-field proc format. */
+ * between this and the old multi-field proc format. */
list_for_each_entry(use, &mod->source_list, source_list) {
printed_something = 1;
seq_printf(m, "%s,", use->source->name);
@@ -964,7 +959,7 @@ static unsigned long maybe_relocated(unsigned long crc,
static int check_version(Elf_Shdr *sechdrs,
unsigned int versindex,
const char *symname,
- struct module *mod,
+ struct module *mod,
const unsigned long *crc,
const struct module *crc_owner)
{
@@ -989,8 +984,8 @@ static int check_version(Elf_Shdr *sechdrs,
if (versions[i].crc == maybe_relocated(*crc, crc_owner))
return 1;
- DEBUGP("Found checksum %lX vs module %lX\n",
- maybe_relocated(*crc, crc_owner), versions[i].crc);
+ pr_debug("Found checksum %lX vs module %lX\n",
+ maybe_relocated(*crc, crc_owner), versions[i].crc);
goto bad_version;
}
@@ -1032,7 +1027,7 @@ static inline int same_magic(const char *amagic, const char *bmagic,
static inline int check_version(Elf_Shdr *sechdrs,
unsigned int versindex,
const char *symname,
- struct module *mod,
+ struct module *mod,
const unsigned long *crc,
const struct module *crc_owner)
{
@@ -1066,7 +1061,8 @@ static const struct kernel_symbol *resolve_symbol(struct module *mod,
mutex_lock(&module_mutex);
sym = find_symbol(name, &owner, &crc,
- !(mod->taints & (1 << TAINT_PROPRIETARY_MODULE)), true);
+ !(mod->taints & (1 << TAINT_PROPRIETARY_MODULE)),
+ true);
if (!sym)
goto unlock;
@@ -1120,15 +1116,13 @@ static inline bool sect_empty(const Elf_Shdr *sect)
return !(sect->sh_flags & SHF_ALLOC) || sect->sh_size == 0;
}
-struct module_sect_attr
-{
+struct module_sect_attr {
struct module_attribute mattr;
char *name;
unsigned long address;
};
-struct module_sect_attrs
-{
+struct module_sect_attrs {
struct attribute_group grp;
unsigned int nsections;
struct module_sect_attr attrs[0];
@@ -1201,7 +1195,7 @@ static void add_sect_attrs(struct module *mod, const struct load_info *info)
mod->sect_attrs = sect_attrs;
return;
- out:
+out:
free_sect_attrs(sect_attrs);
}
@@ -1305,7 +1299,7 @@ static void add_notes_attrs(struct module *mod, const struct load_info *info)
mod->notes_attrs = notes_attrs;
return;
- out:
+out:
free_notes_attrs(notes_attrs, i);
}
@@ -1382,7 +1376,8 @@ static int module_add_modinfo_attrs(struct module *mod)
(attr->test && attr->test(mod))) {
memcpy(temp_attr, attr, sizeof(*temp_attr));
sysfs_attr_init(&temp_attr->attr);
- error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr);
+ error = sysfs_create_file(&mod->mkobj.kobj,
+ &temp_attr->attr);
++temp_attr;
}
}
@@ -1398,7 +1393,7 @@ static void module_remove_modinfo_attrs(struct module *mod)
/* pick a field to test for end of list */
if (!attr->attr.name)
break;
- sysfs_remove_file(&mod->mkobj.kobj,&attr->attr);
+ sysfs_remove_file(&mod->mkobj.kobj, &attr->attr);
if (attr->free)
attr->free(mod);
}
@@ -1635,12 +1630,12 @@ static int simplify_symbols(struct module *mod, const struct load_info *info)
for (i = 1; i < symsec->sh_size / sizeof(Elf_Sym); i++) {
const char *name = info->strtab + sym[i].st_name;
-
- switch (sym[i].st_shndx) {
+ typeof (sym[i].st_shndx) index = sym[i].st_shndx;
+ switch (index) {
case SHN_COMMON:
/* We compiled with -fno-common. These are not
supposed to happen. */
- DEBUGP("Common symbol: %s\n", name);
+ pr_debug("Common symbol: %s\n", name);
pr_info("%s: please compile with -fno-common\n",
mod->name);
ret = -ENOEXEC;
@@ -1648,8 +1643,8 @@ static int simplify_symbols(struct module *mod, const struct load_info *info)
case SHN_ABS:
/* Don't need to do anything */
- DEBUGP("Absolute symbol: 0x%08lx\n",
- (long)sym[i].st_value);
+ pr_debug("Absolute symbol: 0x%08lx\n",
+ (long)sym[i].st_value);
break;
case SHN_UNDEF:
@@ -1671,10 +1666,10 @@ static int simplify_symbols(struct module *mod, const struct load_info *info)
default:
/* Divert to percpu allocation if a percpu var. */
- if (sym[i].st_shndx == info->index.pcpu)
+ if (index == info->index.pcpu)
secbase = (unsigned long)mod_percpu(mod);
else
- secbase = info->sechdrs[sym[i].st_shndx].sh_addr;
+ secbase = info->sechdrs[index].sh_addr;
sym[i].st_value += secbase;
break;
}
@@ -1738,7 +1733,7 @@ static long get_offset(struct module *mod, unsigned int *size,
belongs in init. */
static void layout_sections(struct module *mod, struct load_info *info)
{
- static unsigned long const masks[][2] = {
+ static const unsigned long masks[][2] = {
/* NOTE: all executable code must be the first section
* in this array; otherwise modify the text_size
* finder in the two loops below */
@@ -1752,7 +1747,7 @@ static void layout_sections(struct module *mod, struct load_info *info)
for (i = 0; i < info->hdr->e_shnum; i++)
info->sechdrs[i].sh_entsize = ~0UL;
- DEBUGP("Core section allocation order:\n");
+ pr_debug("Core section allocation order:\n");
for (m = 0; m < ARRAY_SIZE(masks); ++m) {
for (i = 0; i < info->hdr->e_shnum; ++i) {
Elf_Shdr *s = &info->sechdrs[i];
@@ -1764,13 +1759,13 @@ static void layout_sections(struct module *mod, struct load_info *info)
|| strstarts(sname, ".init"))
continue;
s->sh_entsize = get_offset(mod, &mod->core_size, s, i);
- DEBUGP("\t%s\n", name);
+ pr_debug("\t%s\n", sname);
}
if (m == 0)
mod->core_text_size = mod->core_size;
}
- DEBUGP("Init section allocation order:\n");
+ pr_debug("Init section allocation order:\n");
for (m = 0; m < ARRAY_SIZE(masks); ++m) {
for (i = 0; i < info->hdr->e_shnum; ++i) {
Elf_Shdr *s = &info->sechdrs[i];
@@ -1783,7 +1778,7 @@ static void layout_sections(struct module *mod, struct load_info *info)
continue;
s->sh_entsize = (get_offset(mod, &mod->init_size, s, i)
| INIT_OFFSET_MASK);
- DEBUGP("\t%s\n", sname);
+ pr_debug("\t%s\n", sname);
}
if (m == 0)
mod->init_text_size = mod->init_size;
@@ -1925,7 +1920,7 @@ static char elf_type(const Elf_Sym *sym, const struct load_info *info)
}
static bool is_core_symbol(const Elf_Sym *src, const Elf_Shdr *sechdrs,
- unsigned int shnum)
+ unsigned int shnum)
{
const Elf_Shdr *sec;
@@ -1956,7 +1951,7 @@ static void layout_symtab(struct module *mod, struct load_info *info)
symsect->sh_flags |= SHF_ALLOC;
symsect->sh_entsize = get_offset(mod, &mod->init_size, symsect,
info->index.sym) | INIT_OFFSET_MASK;
- DEBUGP("\t%s\n", info->secstrings + symsect->sh_name);
+ pr_debug("\t%s\n", info->secstrings + symsect->sh_name);
src = (void *)info->hdr + symsect->sh_offset;
nsrc = symsect->sh_size / sizeof(*src);
@@ -1978,7 +1973,7 @@ static void layout_symtab(struct module *mod, struct load_info *info)
strsect->sh_flags |= SHF_ALLOC;
strsect->sh_entsize = get_offset(mod, &mod->init_size, strsect,
info->index.str) | INIT_OFFSET_MASK;
- DEBUGP("\t%s\n", info->secstrings + strsect->sh_name);
+ pr_debug("\t%s\n", info->secstrings + strsect->sh_name);
/* Append room for core symbols' strings at end of core part. */
info->stroffs = mod->core_size;
@@ -2364,7 +2359,7 @@ static int move_module(struct module *mod, struct load_info *info)
mod->module_init = ptr;
/* Transfer each section which specifies SHF_ALLOC */
- DEBUGP("final section addresses:\n");
+ pr_debug("final section addresses:\n");
for (i = 0; i < info->hdr->e_shnum; i++) {
void *dest;
Elf_Shdr *shdr = &info->sechdrs[i];
@@ -2382,8 +2377,9 @@ static int move_module(struct module *mod, struct load_info *info)
memcpy(dest, (void *)shdr->sh_addr, shdr->sh_size);
/* Update sh_addr to point to copy in image. */
shdr->sh_addr = (unsigned long)dest;
- DEBUGP("\t0x%lx %s\n",
- shdr->sh_addr, info->secstrings + shdr->sh_name);
+ pr_debug("\t0x%llx %s\n",
+ (unsigned long long)shdr->sh_addr,
+ info->secstrings + shdr->sh_name);
}
return 0;
@@ -2478,8 +2474,9 @@ static struct module *layout_and_allocate(struct load_info *info)
special cases for the architectures. */
layout_sections(mod, info);
- info->strmap = kzalloc(BITS_TO_LONGS(info->sechdrs[info->index.str].sh_size)
- * sizeof(long), GFP_KERNEL);
+ info->strmap =
+ kzalloc(BITS_TO_LONGS(info->sechdrs[info->index.str].sh_size)
+ * sizeof(long), GFP_KERNEL);
if (!info->strmap) {
err = -ENOMEM;
goto free_percpu;
@@ -2539,8 +2536,7 @@ static struct module *load_module(void __user *umod,
struct module *mod;
long err;
- DEBUGP("load_module: umod=%p, len=%lu, uargs=%p\n",
- umod, len, uargs);
+ pr_debug("load_module: umod=%p, len=%lu, uargs=%p\n", umod, len, uargs);
/* Copy in the blobs from userspace, check they are vaguely sane. */
err = copy_and_check(&info, umod, len, uargs);
@@ -2700,8 +2696,8 @@ SYSCALL_DEFINE3(init_module, void __user *, umod,
if (mod->init != NULL)
ret = do_one_initcall(mod->init);
if (ret < 0) {
- /* Init routine failed: abort. Try to protect us from
- buggy refcounters. */
+ /* Init routine failed: abort.
+ * Try to protect us from buggy refcounters. */
mod->state = MODULE_STATE_GOING;
synchronize_sched();
module_put(mod);
@@ -2725,7 +2721,8 @@ SYSCALL_DEFINE3(init_module, void __user *, umod,
blocking_notifier_call_chain(&module_notify_list,
MODULE_STATE_LIVE, mod);
- /* We need to finish all async code before the module init sequence is done */
+ /* We need to finish all async code before the module init sequence
+ * is done */
async_synchronize_full();
mutex_lock(&module_mutex);
@@ -2787,12 +2784,14 @@ static const char *get_ksymbol(struct module *mod,
if (mod->symtab[i].st_value <= addr
&& mod->symtab[i].st_value > mod->symtab[best].st_value
&& *(mod->strtab + mod->symtab[i].st_name) != '\0'
- && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name))
+ && !is_arm_mapping_symbol(mod->strtab +
+ mod->symtab[i].st_name))
best = i;
if (mod->symtab[i].st_value > addr
&& mod->symtab[i].st_value < nextval
&& *(mod->strtab + mod->symtab[i].st_name) != '\0'
- && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name))
+ && !is_arm_mapping_symbol(mod->strtab +
+ mod->symtab[i].st_name))
nextval = mod->symtab[i].st_value;
}
@@ -2929,15 +2928,19 @@ unsigned long module_kallsyms_lookup_name(const char *name)
/* Don't lock: we're in enough trouble already. */
preempt_disable();
- if ((colon = strchr(name, ':')) != NULL) {
+ colon = strchr(name, ':');
+ if (colon != NULL) {
*colon = '\0';
- if ((mod = find_module(name)) != NULL)
+ mod = find_module(name);
+ if (mod != NULL)
ret = mod_find_symname(mod, colon+1);
*colon = ':';
} else {
- list_for_each_entry_rcu(mod, &modules, list)
- if ((ret = mod_find_symname(mod, name)) != 0)
+ list_for_each_entry_rcu(mod, &modules, list) {
+ ret = mod_find_symname(mod, name);
+ if (ret != 0)
break;
+ }
}
preempt_enable();
return ret;
@@ -3025,8 +3028,8 @@ static int m_show(struct seq_file *m, void *p)
/* Informative for users. */
seq_printf(m, " %s",
- mod->state == MODULE_STATE_GOING ? "Unloading":
- mod->state == MODULE_STATE_COMING ? "Loading":
+ mod->state == MODULE_STATE_GOING ? "Unloading" :
+ mod->state == MODULE_STATE_COMING ? "Loading" :
"Live");
/* Used by oprofile and other similar tools. */
seq_printf(m, " 0x%p", mod->module_core);
--
1.7.3.1.g432b3.dirty
--
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