aboutsummaryrefslogtreecommitdiff
path: root/lib
diff options
context:
space:
mode:
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig4
-rw-r--r--lib/Kconfig.debug117
-rw-r--r--lib/Makefile5
-rw-r--r--lib/bitmap.c11
-rw-r--r--lib/cmdline.c2
-rw-r--r--lib/dynamic_printk.c418
-rw-r--r--lib/iommu-helper.c14
-rw-r--r--lib/klist.c96
-rw-r--r--lib/kobject.c35
-rw-r--r--lib/parser.c2
-rw-r--r--lib/percpu_counter.c8
-rw-r--r--lib/string_helpers.c64
-rw-r--r--lib/swiotlb.c49
-rw-r--r--lib/vsprintf.c284
14 files changed, 904 insertions, 205 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index c7ad7a5b353..85cf7ea978a 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -8,10 +8,10 @@ config BITREVERSE
tristate
config GENERIC_FIND_FIRST_BIT
- def_bool n
+ bool
config GENERIC_FIND_NEXT_BIT
- def_bool n
+ bool
config CRC_CCITT
tristate "CRC-CCITT functions"
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 0b504814e37..b0f239e443b 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -495,6 +495,15 @@ config DEBUG_VM
If unsure, say N.
+config DEBUG_VIRTUAL
+ bool "Debug VM translations"
+ depends on DEBUG_KERNEL && X86
+ help
+ Enable some costly sanity checks in virtual to page code. This can
+ catch mistakes with virt_to_page() and friends.
+
+ If unsure, say N.
+
config DEBUG_WRITECOUNT
bool "Debug filesystem writers count"
depends on DEBUG_KERNEL
@@ -597,6 +606,19 @@ config RCU_TORTURE_TEST_RUNNABLE
Say N here if you want the RCU torture tests to start only
after being manually enabled via /proc.
+config RCU_CPU_STALL_DETECTOR
+ bool "Check for stalled CPUs delaying RCU grace periods"
+ depends on CLASSIC_RCU
+ default n
+ help
+ This option causes RCU to printk information on which
+ CPUs are delaying the current grace period, but only when
+ the grace period extends for excessive time periods.
+
+ Say Y if you want RCU to perform such checks.
+
+ Say N if you are unsure.
+
config KPROBES_SANITY_TEST
bool "Kprobes sanity tests"
depends on DEBUG_KERNEL
@@ -624,6 +646,33 @@ config BACKTRACE_SELF_TEST
Say N if you are unsure.
+config DEBUG_BLOCK_EXT_DEVT
+ bool "Force extended block device numbers and spread them"
+ depends on DEBUG_KERNEL
+ depends on BLOCK
+ default n
+ help
+ BIG FAT WARNING: ENABLING THIS OPTION MIGHT BREAK BOOTING ON
+ SOME DISTRIBUTIONS. DO NOT ENABLE THIS UNLESS YOU KNOW WHAT
+ YOU ARE DOING. Distros, please enable this and fix whatever
+ is broken.
+
+ Conventionally, block device numbers are allocated from
+ predetermined contiguous area. However, extended block area
+ may introduce non-contiguous block device numbers. This
+ option forces most block device numbers to be allocated from
+ the extended space and spreads them to discover kernel or
+ userland code paths which assume predetermined contiguous
+ device number allocation.
+
+ Note that turning on this debug option shuffles all the
+ device numbers for all IDE and SCSI devices including libata
+ ones, so root partition specified using device number
+ directly (via rdev or root=MAJ:MIN) won't work anymore.
+ Textual device names (root=/dev/sdXn) will continue to work.
+
+ Say N if you are unsure.
+
config LKDTM
tristate "Linux Kernel Dump Test Tool Module"
depends on DEBUG_KERNEL
@@ -661,10 +710,21 @@ config FAIL_PAGE_ALLOC
config FAIL_MAKE_REQUEST
bool "Fault-injection capability for disk IO"
- depends on FAULT_INJECTION
+ depends on FAULT_INJECTION && BLOCK
help
Provide fault-injection capability for disk IO.
+config FAIL_IO_TIMEOUT
+ bool "Faul-injection capability for faking disk interrupts"
+ depends on FAULT_INJECTION && BLOCK
+ help
+ Provide fault-injection capability on end IO handling. This
+ will make the block layer "forget" an interrupt as configured,
+ thus exercising the error handling.
+
+ Only works with drivers that use the generic timeout handling,
+ for others it wont do anything.
+
config FAULT_INJECTION_DEBUG_FS
bool "Debugfs entries for fault-injection capabilities"
depends on FAULT_INJECTION && SYSFS && DEBUG_FS
@@ -752,6 +812,61 @@ menuconfig BUILD_DOCSRC
Say N if you are unsure.
+config DYNAMIC_PRINTK_DEBUG
+ bool "Enable dynamic printk() call support"
+ default n
+ depends on PRINTK
+ select PRINTK_DEBUG
+ help
+
+ Compiles debug level messages into the kernel, which would not
+ otherwise be available at runtime. These messages can then be
+ enabled/disabled on a per module basis. This mechanism implicitly
+ enables all pr_debug() and dev_dbg() calls. The impact of this
+ compile option is a larger kernel text size of about 2%.
+
+ Usage:
+
+ Dynamic debugging is controlled by the debugfs file,
+ dynamic_printk/modules. This file contains a list of the modules that
+ can be enabled. The format of the file is the module name, followed
+ by a set of flags that can be enabled. The first flag is always the
+ 'enabled' flag. For example:
+
+ <module_name> <enabled=0/1>
+ .
+ .
+ .
+
+ <module_name> : Name of the module in which the debug call resides
+ <enabled=0/1> : whether the messages are enabled or not
+
+ From a live system:
+
+ snd_hda_intel enabled=0
+ fixup enabled=0
+ driver enabled=0
+
+ Enable a module:
+
+ $echo "set enabled=1 <module_name>" > dynamic_printk/modules
+
+ Disable a module:
+
+ $echo "set enabled=0 <module_name>" > dynamic_printk/modules
+
+ Enable all modules:
+
+ $echo "set enabled=1 all" > dynamic_printk/modules
+
+ Disable all modules:
+
+ $echo "set enabled=0 all" > dynamic_printk/modules
+
+ Finally, passing "dynamic_printk" at the command line enables
+ debugging for all modules. This mode can be turned off via the above
+ disable command.
+
source "samples/Kconfig"
source "lib/Kconfig.kgdb"
diff --git a/lib/Makefile b/lib/Makefile
index 3b1f94bbe9d..16feaab057b 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -19,7 +19,8 @@ lib-$(CONFIG_SMP) += cpumask.o
lib-y += kobject.o kref.o klist.o
obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \
- bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o
+ bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \
+ string_helpers.o
ifeq ($(CONFIG_DEBUG_KOBJECT),y)
CFLAGS_kobject.o += -DDEBUG
@@ -80,6 +81,8 @@ obj-$(CONFIG_HAVE_LMB) += lmb.o
obj-$(CONFIG_HAVE_ARCH_TRACEHOOK) += syscall.o
+obj-$(CONFIG_DYNAMIC_PRINTK_DEBUG) += dynamic_printk.o
+
hostprogs-y := gen_crc32table
clean-files := crc32table.h
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 06fb57c86de..482df94ea21 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -316,17 +316,6 @@ int bitmap_scnprintf(char *buf, unsigned int buflen,
EXPORT_SYMBOL(bitmap_scnprintf);
/**
- * bitmap_scnprintf_len - return buffer length needed to convert
- * bitmap to an ASCII hex string
- * @nr_bits: number of bits to be converted
- */
-int bitmap_scnprintf_len(unsigned int nr_bits)
-{
- unsigned int nr_nibbles = ALIGN(nr_bits, 4) / 4;
- return nr_nibbles + ALIGN(nr_nibbles, CHUNKSZ / 4) / (CHUNKSZ / 4) - 1;
-}
-
-/**
* __bitmap_parse - convert an ASCII hex string into a bitmap.
* @buf: pointer to buffer containing string.
* @buflen: buffer size in bytes. If string is smaller than this
diff --git a/lib/cmdline.c b/lib/cmdline.c
index 5ba8a942a47..f5f3ad8b62f 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -126,7 +126,7 @@ char *get_options(const char *str, int nints, int *ints)
* megabyte, or one gigabyte, respectively.
*/
-unsigned long long memparse(char *ptr, char **retptr)
+unsigned long long memparse(const char *ptr, char **retptr)
{
char *endptr; /* local pointer to end of parsed string */
diff --git a/lib/dynamic_printk.c b/lib/dynamic_printk.c
new file mode 100644
index 00000000000..d640f87bdc9
--- /dev/null
+++ b/lib/dynamic_printk.c
@@ -0,0 +1,418 @@
+/*
+ * lib/dynamic_printk.c
+ *
+ * make pr_debug()/dev_dbg() calls runtime configurable based upon their
+ * their source module.
+ *
+ * Copyright (C) 2008 Red Hat, Inc., Jason Baron <jbaron@redhat.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/uaccess.h>
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
+#include <linux/fs.h>
+
+extern struct mod_debug __start___verbose[];
+extern struct mod_debug __stop___verbose[];
+
+struct debug_name {
+ struct hlist_node hlist;
+ struct hlist_node hlist2;
+ int hash1;
+ int hash2;
+ char *name;
+ int enable;
+ int type;
+};
+
+static int nr_entries;
+static int num_enabled;
+int dynamic_enabled = DYNAMIC_ENABLED_NONE;
+static struct hlist_head module_table[DEBUG_HASH_TABLE_SIZE] =
+ { [0 ... DEBUG_HASH_TABLE_SIZE-1] = HLIST_HEAD_INIT };
+static struct hlist_head module_table2[DEBUG_HASH_TABLE_SIZE] =
+ { [0 ... DEBUG_HASH_TABLE_SIZE-1] = HLIST_HEAD_INIT };
+static DECLARE_MUTEX(debug_list_mutex);
+
+/* dynamic_printk_enabled, and dynamic_printk_enabled2 are bitmasks in which
+ * bit n is set to 1 if any modname hashes into the bucket n, 0 otherwise. They
+ * use independent hash functions, to reduce the chance of false positives.
+ */
+long long dynamic_printk_enabled;
+EXPORT_SYMBOL_GPL(dynamic_printk_enabled);
+long long dynamic_printk_enabled2;
+EXPORT_SYMBOL_GPL(dynamic_printk_enabled2);
+
+/* returns the debug module pointer. */
+static struct debug_name *find_debug_module(char *module_name)
+{
+ int i;
+ struct hlist_head *head;
+ struct hlist_node *node;
+ struct debug_name *element;
+
+ element = NULL;
+ for (i = 0; i < DEBUG_HASH_TABLE_SIZE; i++) {
+ head = &module_table[i];
+ hlist_for_each_entry_rcu(element, node, head, hlist)
+ if (!strcmp(element->name, module_name))
+ return element;
+ }
+ return NULL;
+}
+
+/* returns the debug module pointer. */
+static struct debug_name *find_debug_module_hash(char *module_name, int hash)
+{
+ struct hlist_head *head;
+ struct hlist_node *node;
+ struct debug_name *element;
+
+ element = NULL;
+ head = &module_table[hash];
+ hlist_for_each_entry_rcu(element, node, head, hlist)
+ if (!strcmp(element->name, module_name))
+ return element;
+ return NULL;
+}
+
+/* caller must hold mutex*/
+static int __add_debug_module(char *mod_name, int hash, int hash2)
+{
+ struct debug_name *new;
+ char *module_name;
+ int ret = 0;
+
+ if (find_debug_module(mod_name)) {
+ ret = -EINVAL;
+ goto out;
+ }
+ module_name = kmalloc(strlen(mod_name) + 1, GFP_KERNEL);
+ if (!module_name) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ module_name = strcpy(module_name, mod_name);
+ module_name[strlen(mod_name)] = '\0';
+ new = kzalloc(sizeof(struct debug_name), GFP_KERNEL);
+ if (!new) {
+ kfree(module_name);
+ ret = -ENOMEM;
+ goto out;
+ }
+ INIT_HLIST_NODE(&new->hlist);
+ INIT_HLIST_NODE(&new->hlist2);
+ new->name = module_name;
+ new->hash1 = hash;
+ new->hash2 = hash2;
+ hlist_add_head_rcu(&new->hlist, &module_table[hash]);
+ hlist_add_head_rcu(&new->hlist2, &module_table2[hash2]);
+ nr_entries++;
+out:
+ return ret;
+}
+
+int unregister_dynamic_debug_module(char *mod_name)
+{
+ struct debug_name *element;
+ int ret = 0;
+
+ down(&debug_list_mutex);
+ element = find_debug_module(mod_name);
+ if (!element) {
+ ret = -EINVAL;
+ goto out;
+ }
+ hlist_del_rcu(&element->hlist);
+ hlist_del_rcu(&element->hlist2);
+ synchronize_rcu();
+ kfree(element->name);
+ if (element->enable)
+ num_enabled--;
+ kfree(element);
+ nr_entries--;
+out:
+ up(&debug_list_mutex);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(unregister_dynamic_debug_module);
+
+int register_dynamic_debug_module(char *mod_name, int type, char *share_name,
+ char *flags, int hash, int hash2)
+{
+ struct debug_name *elem;
+ int ret = 0;
+
+ down(&debug_list_mutex);
+ elem = find_debug_module(mod_name);
+ if (!elem) {
+ if (__add_debug_module(mod_name, hash, hash2))
+ goto out;
+ elem = find_debug_module(mod_name);
+ if (dynamic_enabled == DYNAMIC_ENABLED_ALL &&
+ !strcmp(mod_name, share_name)) {
+ elem->enable = true;
+ num_enabled++;
+ }
+ }
+ elem->type |= type;
+out:
+ up(&debug_list_mutex);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(register_dynamic_debug_module);
+
+int __dynamic_dbg_enabled_helper(char *mod_name, int type, int value, int hash)
+{
+ struct debug_name *elem;
+ int ret = 0;
+
+ if (dynamic_enabled == DYNAMIC_ENABLED_ALL)
+ return 1;
+ rcu_read_lock();
+ elem = find_debug_module_hash(mod_name, hash);
+ if (elem && elem->enable)
+ ret = 1;
+ rcu_read_unlock();
+ return ret;
+}
+EXPORT_SYMBOL_GPL(__dynamic_dbg_enabled_helper);
+
+static void set_all(bool enable)
+{
+ struct debug_name *e;
+ struct hlist_node *node;
+ int i;
+ long long enable_mask;
+
+ for (i = 0; i < DEBUG_HASH_TABLE_SIZE; i++) {
+ if (module_table[i].first != NULL) {
+ hlist_for_each_entry(e, node, &module_table[i], hlist) {
+ e->enable = enable;
+ }
+ }
+ }
+ if (enable)
+ enable_mask = ULLONG_MAX;
+ else
+ enable_mask = 0;
+ dynamic_printk_enabled = enable_mask;
+ dynamic_printk_enabled2 = enable_mask;
+}
+
+static int disabled_hash(int i, bool first_table)
+{
+ struct debug_name *e;
+ struct hlist_node *node;
+
+ if (first_table) {
+ hlist_for_each_entry(e, node, &module_table[i], hlist) {
+ if (e->enable)
+ return 0;
+ }
+ } else {
+ hlist_for_each_entry(e, node, &module_table2[i], hlist2) {
+ if (e->enable)
+ return 0;
+ }
+ }
+ return 1;
+}
+
+static ssize_t pr_debug_write(struct file *file, const char __user *buf,
+ size_t length, loff_t *ppos)
+{
+ char *buffer, *s, *value_str, *setting_str;
+ int err, value;
+ struct debug_name *elem = NULL;
+ int all = 0;
+
+ if (length > PAGE_SIZE || length < 0)
+ return -EINVAL;
+
+ buffer = (char *)__get_free_page(GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ err = -EFAULT;
+ if (copy_from_user(buffer, buf, length))
+ goto out;
+
+ err = -EINVAL;
+ if (length < PAGE_SIZE)
+ buffer[length] = '\0';
+ else if (buffer[PAGE_SIZE-1])
+ goto out;
+
+ err = -EINVAL;
+ down(&debug_list_mutex);
+
+ if (strncmp("set", buffer, 3))
+ goto out_up;
+ s = buffer + 3;
+ setting_str = strsep(&s, "=");
+ if (s == NULL)
+ goto out_up;
+ setting_str = strstrip(setting_str);
+ value_str = strsep(&s, " ");
+ if (s == NULL)
+ goto out_up;
+ s = strstrip(s);
+ if (!strncmp(s, "all", 3))
+ all = 1;
+ else
+ elem = find_debug_module(s);
+ if (!strncmp(setting_str, "enable", 6)) {
+ value = !!simple_strtol(value_str, NULL, 10);
+ if (all) {
+ if (value) {
+ set_all(true);
+ num_enabled = nr_entries;
+ dynamic_enabled = DYNAMIC_ENABLED_ALL;
+ } else {
+ set_all(false);
+ num_enabled = 0;
+ dynamic_enabled = DYNAMIC_ENABLED_NONE;
+ }
+ err = 0;
+ } else {
+ if (elem) {
+ if (value && (elem->enable == 0)) {
+ dynamic_printk_enabled |=
+ (1LL << elem->hash1);
+ dynamic_printk_enabled2 |=
+ (1LL << elem->hash2);
+ elem->enable = 1;
+ num_enabled++;
+ dynamic_enabled = DYNAMIC_ENABLED_SOME;
+ err = 0;
+ printk(KERN_DEBUG
+ "debugging enabled for module %s",
+ elem->name);
+ } else if (!value && (elem->enable == 1)) {
+ elem->enable = 0;
+ num_enabled--;
+ if (disabled_hash(elem->hash1, true))
+ dynamic_printk_enabled &=
+ ~(1LL << elem->hash1);
+ if (disabled_hash(elem->hash2, false))
+ dynamic_printk_enabled2 &=
+ ~(1LL << elem->hash2);
+ if (num_enabled)
+ dynamic_enabled =
+ DYNAMIC_ENABLED_SOME;
+ else
+ dynamic_enabled =
+ DYNAMIC_ENABLED_NONE;
+ err = 0;
+ printk(KERN_DEBUG
+ "debugging disabled for module "
+ "%s", elem->name);
+ }
+ }
+ }
+ }
+ if (!err)
+ err = length;
+out_up:
+ up(&debug_list_mutex);
+out:
+ free_page((unsigned long)buffer);
+ return err;
+}
+
+static void *pr_debug_seq_start(struct seq_file *f, loff_t *pos)
+{
+ return (*pos < DEBUG_HASH_TABLE_SIZE) ? pos : NULL;
+}
+
+static void *pr_debug_seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ (*pos)++;
+ if (*pos >= DEBUG_HASH_TABLE_SIZE)
+ return NULL;
+ return pos;
+}
+
+static void pr_debug_seq_stop(struct seq_file *s, void *v)
+{
+ /* Nothing to do */
+}
+
+static int pr_debug_seq_show(struct seq_file *s, void *v)
+{
+ struct hlist_head *head;
+ struct hlist_node *node;
+ struct debug_name *elem;
+ unsigned int i = *(loff_t *) v;
+
+ rcu_read_lock();
+ head = &module_table[i];
+ hlist_for_each_entry_rcu(elem, node, head, hlist) {
+ seq_printf(s, "%s enabled=%d", elem->name, elem->enable);
+ seq_printf(s, "\n");
+ }
+ rcu_read_unlock();
+ return 0;
+}
+
+static struct seq_operations pr_debug_seq_ops = {
+ .start = pr_debug_seq_start,
+ .next = pr_debug_seq_next,
+ .stop = pr_debug_seq_stop,
+ .show = pr_debug_seq_show
+};
+
+static int pr_debug_open(struct inode *inode, struct file *filp)
+{
+ return seq_open(filp, &pr_debug_seq_ops);
+}
+
+static const struct file_operations pr_debug_operations = {
+ .open = pr_debug_open,
+ .read = seq_read,
+ .write = pr_debug_write,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int __init dynamic_printk_init(void)
+{
+ struct dentry *dir, *file;
+ struct mod_debug *iter;
+ unsigned long value;
+
+ dir = debugfs_create_dir("dynamic_printk", NULL);
+ if (!dir)
+ return -ENOMEM;
+ file = debugfs_create_file("modules", 0644, dir, NULL,
+ &pr_debug_operations);
+ if (!file) {
+ debugfs_remove(dir);
+ return -ENOMEM;
+ }
+ for (value = (unsigned long)__start___verbose;
+ value < (unsigned long)__stop___verbose;
+ value += sizeof(struct mod_debug)) {
+ iter = (struct mod_debug *)value;
+ register_dynamic_debug_module(iter->modname,
+ iter->type,
+ iter->logical_modname,
+ iter->flag_names, iter->hash, iter->hash2);
+ }
+ return 0;
+}
+module_init(dynamic_printk_init);
+/* may want to move this earlier so we can get traces as early as possible */
+
+static int __init dynamic_printk_setup(char *str)
+{
+ if (str)
+ return -ENOENT;
+ set_all(true);
+ return 0;
+}
+/* Use early_param(), so we can get debug output as early as possible */
+early_param("dynamic_printk", dynamic_printk_setup);
diff --git a/lib/iommu-helper.c b/lib/iommu-helper.c
index a3b8d4c3f77..75dbda03f4f 100644
--- a/lib/iommu-helper.c
+++ b/lib/iommu-helper.c
@@ -30,8 +30,7 @@ again:
return index;
}
-static inline void set_bit_area(unsigned long *map, unsigned long i,
- int len)
+void iommu_area_reserve(unsigned long *map, unsigned long i, int len)
{
unsigned long end = i + len;
while (i < end) {
@@ -64,7 +63,7 @@ again:
start = index + 1;
goto again;
}
- set_bit_area(map, index, nr);
+ iommu_area_reserve(map, index, nr);
}
return index;
}
@@ -80,3 +79,12 @@ void iommu_area_free(unsigned long *map, unsigned long start, unsigned int nr)
}
}
EXPORT_SYMBOL(iommu_area_free);
+
+unsigned long iommu_num_pages(unsigned long addr, unsigned long len,
+ unsigned long io_page_size)
+{
+ unsigned long size = (addr & (io_page_size - 1)) + len;
+
+ return DIV_ROUND_UP(size, io_page_size);
+}
+EXPORT_SYMBOL(iommu_num_pages);
diff --git a/lib/klist.c b/lib/klist.c
index cca37f96faa..bbdd3015c2c 100644
--- a/lib/klist.c
+++ b/lib/klist.c
@@ -37,6 +37,37 @@
#include <linux/klist.h>
#include <linux/module.h>
+/*
+ * Use the lowest bit of n_klist to mark deleted nodes and exclude
+ * dead ones from iteration.
+ */
+#define KNODE_DEAD 1LU
+#define KNODE_KLIST_MASK ~KNODE_DEAD
+
+static struct klist *knode_klist(struct klist_node *knode)
+{
+ return (struct klist *)
+ ((unsigned long)knode->n_klist & KNODE_KLIST_MASK);
+}
+
+static bool knode_dead(struct klist_node *knode)
+{
+ return (unsigned long)knode->n_klist & KNODE_DEAD;
+}
+
+static void knode_set_klist(struct klist_node *knode, struct klist *klist)
+{
+ knode->n_klist = klist;
+ /* no knode deserves to start its life dead */
+ WARN_ON(knode_dead(knode));
+}
+
+static void knode_kill(struct klist_node *knode)
+{
+ /* and no knode should die twice ever either, see we're very humane */
+ WARN_ON(knode_dead(knode));
+ *(unsigned long *)&knode->n_klist |= KNODE_DEAD;
+}
/**
* klist_init - Initialize a klist structure.
@@ -79,7 +110,7 @@ static void klist_node_init(struct klist *k, struct klist_node *n)
INIT_LIST_HEAD(&n->n_node);
init_completion(&n->n_removed);
kref_init(&n->n_ref);
- n->n_klist = k;
+ knode_set_klist(n, k);
if (k->get)
k->get(n);
}
@@ -115,7 +146,7 @@ EXPORT_SYMBOL_GPL(klist_add_tail);
*/
void klist_add_after(struct klist_node *n, struct klist_node *pos)
{
- struct klist *k = pos->n_klist;
+ struct klist *k = knode_klist(pos);
klist_node_init(k, n);
spin_lock(&k->k_lock);
@@ -131,7 +162,7 @@ EXPORT_SYMBOL_GPL(klist_add_after);
*/
void klist_add_before(struct klist_node *n, struct klist_node *pos)
{
- struct klist *k = pos->n_klist;
+ struct klist *k = knode_klist(pos);
klist_node_init(k, n);
spin_lock(&k->k_lock);
@@ -144,9 +175,10 @@ static void klist_release(struct kref *kref)
{
struct klist_node *n = container_of(kref, struct klist_node, n_ref);
+ WARN_ON(!knode_dead(n));
list_del(&n->n_node);
complete(&n->n_removed);
- n->n_klist = NULL;
+ knode_set_klist(n, NULL);
}
static int klist_dec_and_del(struct klist_node *n)
@@ -154,22 +186,29 @@ static int klist_dec_and_del(struct klist_node *n)
return kref_put(&n->n_ref, klist_release);
}
-/**
- * klist_del - Decrement the reference count of node and try to remove.
- * @n: node we're deleting.
- */
-void klist_del(struct klist_node *n)
+static void klist_put(struct klist_node *n, bool kill)
{
- struct klist *k = n->n_klist;
+ struct klist *k = knode_klist(n);
void (*put)(struct klist_node *) = k->put;
spin_lock(&k->k_lock);
+ if (kill)
+ knode_kill(n);
if (!klist_dec_and_del(n))
put = NULL;
spin_unlock(&k->k_lock);
if (put)
put(n);
}
+
+/**
+ * klist_del - Decrement the reference count of node and try to remove.
+ * @n: node we're deleting.
+ */
+void klist_del(struct klist_node *n)
+{
+ klist_put(n, true);
+}
EXPORT_SYMBOL_GPL(klist_del);
/**
@@ -206,7 +245,6 @@ void klist_iter_init_node(struct klist *k, struct klist_iter *i,
struct klist_node *n)
{
i->i_klist = k;
- i->i_head = &k->k_list;
i->i_cur = n;
if (n)
kref_get(&n->n_ref);
@@ -237,7 +275,7 @@ EXPORT_SYMBOL_GPL(klist_iter_init);
void klist_iter_exit(struct klist_iter *i)
{
if (i->i_cur) {
- klist_del(i->i_cur);
+ klist_put(i->i_cur, false);
i->i_cur = NULL;
}
}
@@ -258,27 +296,33 @@ static struct klist_node *to_klist_node(struct list_head *n)
*/
struct klist_node *klist_next(struct klist_iter *i)
{
- struct list_head *next;
- struct klist_node *lnode = i->i_cur;
- struct klist_node *knode = NULL;
void (*put)(struct klist_node *) = i->i_klist->put;
+ struct klist_node *last = i->i_cur;
+ struct klist_node *next;
spin_lock(&i->i_klist->k_lock);
- if (lnode) {
- next = lnode->n_node.next;
- if (!klist_dec_and_del(lnode))
+
+ if (last) {
+ next = to_klist_node(last->n_node.next);
+ if (!klist_dec_and_del(last))
put = NULL;
} else
- next = i->i_head->next;
+ next = to_klist_node(i->i_klist->k_list.next);
- if (next != i->i_head) {
- knode = to_klist_node(next);
- kref_get(&knode->n_ref);
+ i->i_cur = NULL;
+ while (next != to_klist_node(&i->i_klist->k_list)) {
+ if (likely(!knode_dead(next))) {
+ kref_get(&next->n_ref);
+ i->i_cur = next;
+ break;
+ }
+ next = to_klist_node(next->n_node.next);
}
- i->i_cur = knode;
+
spin_unlock(&i->i_klist->k_lock);
- if (put && lnode)
- put(lnode);
- return knode;
+
+ if (put && last)
+ put(last);
+ return i->i_cur;
}
EXPORT_SYMBOL_GPL(klist_next);
diff --git a/lib/kobject.c b/lib/kobject.c
index fbf0ae28237..0487d1f6480 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -387,11 +387,17 @@ EXPORT_SYMBOL_GPL(kobject_init_and_add);
* kobject_rename - change the name of an object
* @kobj: object in question.
* @new_name: object's new name
+ *
+ * It is the responsibility of the caller to provide mutual
+ * exclusion between two different calls of kobject_rename
+ * on the same kobject and to ensure that new_name is valid and
+ * won't conflict with other kobjects.
*/
int kobject_rename(struct kobject *kobj, const char *new_name)
{
int error = 0;
const char *devpath = NULL;
+ const char *dup_name = NULL, *name;
char *devpath_string = NULL;
char *envp[2];
@@ -401,19 +407,6 @@ int kobject_rename(struct kobject *kobj, const char *new_name)
if (!kobj->parent)
return -EINVAL;
- /* see if this name is already in use */
- if (kobj->kset) {
- struct kobject *temp_kobj;
- temp_kobj = kset_find_obj(kobj->kset, new_name);
- if (temp_kobj) {
- printk(KERN_WARNING "kobject '%s' cannot be renamed "
- "to '%s' as '%s' is already in existence.\n",
- kobject_name(kobj), new_name, new_name);
- kobject_put(temp_kobj);
- return -EINVAL;
- }
- }
-
devpath = kobject_get_path(kobj, GFP_KERNEL);
if (!devpath) {
error = -ENOMEM;
@@ -428,15 +421,27 @@ int kobject_rename(struct kobject *kobj, const char *new_name)
envp[0] = devpath_string;
envp[1] = NULL;
+ name = dup_name = kstrdup(new_name, GFP_KERNEL);
+ if (!name) {
+ error = -ENOMEM;
+ goto out;
+ }
+
error = sysfs_rename_dir(kobj, new_name);
+ if (error)
+ goto out;
+
+ /* Install the new kobject name */
+ dup_name = kobj->name;
+ kobj->name = name;
/* This function is mostly/only used for network interface.
* Some hotplug package track interfaces by their name and
* therefore want to know when the name is changed by the user. */
- if (!error)
- kobject_uevent_env(kobj, KOBJ_MOVE, envp);
+ kobject_uevent_env(kobj, KOBJ_MOVE, envp);
out:
+ kfree(dup_name);
kfree(devpath_string);
kfree(devpath);
kobject_put(kobj);
diff --git a/lib/parser.c b/lib/parser.c
index 4f0cbc03e0e..b00d02059a5 100644
--- a/lib/parser.c
+++ b/lib/parser.c
@@ -100,7 +100,7 @@ static int match_one(char *s, const char *p, substring_t args[])
* format identifiers which will be taken into account when matching the
* tokens, and whose locations will be returned in the @args array.
*/
-int match_token(char *s, match_table_t table, substring_t args[])
+int match_token(char *s, const match_table_t table, substring_t args[])
{
const struct match_token *p;
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index 4a8ba4bf5f6..a8663890a88 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -52,7 +52,7 @@ EXPORT_SYMBOL(__percpu_counter_add);
* Add up all the per-cpu counts, return the result. This is a more accurate
* but much slower version of percpu_counter_read_positive()
*/
-s64 __percpu_counter_sum(struct percpu_counter *fbc, int set)
+s64 __percpu_counter_sum(struct percpu_counter *fbc)
{
s64 ret;
int cpu;
@@ -62,11 +62,9 @@ s64 __percpu_counter_sum(struct percpu_counter *fbc, int set)
for_each_online_cpu(cpu) {
s32 *pcount = per_cpu_ptr(fbc->counters, cpu);
ret += *pcount;
- if (set)
- *pcount = 0;
+ *pcount = 0;
}
- if (set)
- fbc->count = ret;
+ fbc->count = ret;
spin_unlock(&fbc->lock);
return ret;
diff --git a/lib/string_helpers.c b/lib/string_helpers.c
new file mode 100644
index 00000000000..8347925030f
--- /dev/null
+++ b/lib/string_helpers.c
@@ -0,0 +1,64 @@
+/*
+ * Helpers for formatting and printing strings
+ *
+ * Copyright 31 August 2008 James Bottomley
+ */
+#include <linux/kernel.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/string_helpers.h>
+
+/**
+ * string_get_size - get the size in the specified units
+ * @size: The size to be converted
+ * @units: units to use (powers of 1000 or 1024)
+ * @buf: buffer to format to
+ * @len: length of buffer
+ *
+ * This function returns a string formatted to 3 significant figures
+ * giving the size in the required units. Returns 0 on success or
+ * error on failure. @buf is always zero terminated.
+ *
+ */
+int string_get_size(u64 size, const enum string_size_units units,
+ char *buf, int len)
+{
+ const char *units_10[] = { "B", "KB", "MB", "GB", "TB", "PB",
+ "EB", "ZB", "YB", NULL};
+ const char *units_2[] = {"B", "KiB", "MiB", "GiB", "TiB", "PiB",
+ "EiB", "ZiB", "YiB", NULL };
+ const char **units_str[] = {
+ [STRING_UNITS_10] = units_10,
+ [STRING_UNITS_2] = units_2,
+ };
+ const int divisor[] = {
+ [STRING_UNITS_10] = 1000,
+ [STRING_UNITS_2] = 1024,
+ };
+ int i, j;
+ u64 remainder = 0, sf_cap;
+ char tmp[8];
+
+ tmp[0] = '\0';
+
+ for (i = 0; size > divisor[units] && units_str[units][i]; i++)
+ remainder = do_div(size, divisor[units]);
+
+ sf_cap = size;
+ for (j = 0; sf_cap*10 < 1000; j++)
+ sf_cap *= 10;
+
+ if (j) {
+ remainder *= 1000;
+ do_div(remainder, divisor[units]);
+ snprintf(tmp, sizeof(tmp), ".%03lld",
+ (unsigned long long)remainder);
+ tmp[j+1] = '\0';
+ }
+
+ snprintf(buf, len, "%lld%s%s", (unsigned long long)size,
+ tmp, units_str[units][i]);
+
+ return 0;
+}
+EXPORT_SYMBOL(string_get_size);
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 8826fdf0f18..f8eebd48914 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -274,13 +274,14 @@ cleanup1:
}
static int
-address_needs_mapping(struct device *hwdev, dma_addr_t addr)
+address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size)
{
- dma_addr_t mask = 0xffffffff;
- /* If the device has a mask, use it, otherwise default to 32 bits */
- if (hwdev && hwdev->dma_mask)
- mask = *hwdev->dma_mask;
- return (addr & ~mask) != 0;
+ return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
+}
+
+static int is_swiotlb_buffer(char *addr)
+{
+ return addr >= io_tlb_start && addr < io_tlb_end;
}
/*
@@ -467,15 +468,8 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
void *ret;
int order = get_order(size);
- /*
- * XXX fix me: the DMA API should pass us an explicit DMA mask
- * instead, or use ZONE_DMA32 (ia64 overloads ZONE_DMA to be a ~32
- * bit range instead of a 16MB one).
- */
- flags |= GFP_DMA;
-
ret = (void *)__get_free_pages(flags, order);
- if (ret && address_needs_mapping(hwdev, virt_to_bus(ret))) {
+ if (ret && address_needs_mapping(hwdev, virt_to_bus(ret), size)) {
/*
* The allocated memory isn't reachable by the device.
* Fall back on swiotlb_map_single().
@@ -490,19 +484,16 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
* swiotlb_map_single(), which will grab memory from
* the lowest available address range.
*/
- dma_addr_t handle;
- handle = swiotlb_map_single(hwdev, NULL, size, DMA_FROM_DEVICE);
- if (swiotlb_dma_mapping_error(hwdev, handle))
+ ret = map_single(hwdev, NULL, size, DMA_FROM_DEVICE);
+ if (!ret)
return NULL;
-
- ret = bus_to_virt(handle);
}
memset(ret, 0, size);
dev_addr = virt_to_bus(ret);
/* Confirm address can be DMA'd by device */
- if (address_needs_mapping(hwdev, dev_addr)) {
+ if (address_needs_mapping(hwdev, dev_addr, size)) {
printk("hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx\n",
(unsigned long long)*hwdev->dma_mask,
(unsigned long long)dev_addr);
@@ -518,12 +509,11 @@ swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
dma_addr_t dma_handle)
{
WARN_ON(irqs_disabled());
- if (!(vaddr >= (void *)io_tlb_start
- && vaddr < (void *)io_tlb_end))
+ if (!is_swiotlb_buffer(vaddr))
free_pages((unsigned long) vaddr, get_order(size));
else
/* DMA_TO_DEVICE to avoid memcpy in unmap_single */
- swiotlb_unmap_single (hwdev, dma_handle, size, DMA_TO_DEVICE);
+ unmap_single(hwdev, vaddr, size, DMA_TO_DEVICE);
}
static void
@@ -567,7 +557,7 @@ swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
* we can safely return the device addr and not worry about bounce
* buffering it.
*/
- if (!address_needs_mapping(hwdev, dev_addr) && !swiotlb_force)
+ if (!address_needs_mapping(hwdev, dev_addr, size) && !swiotlb_force)
return dev_addr;
/*
@@ -584,7 +574,7 @@ swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
/*
* Ensure that the address returned is DMA'ble
*/
- if (address_needs_mapping(hwdev, dev_addr))
+ if (address_needs_mapping(hwdev, dev_addr, size))
panic("map_single: bounce buffer is not DMA'ble");
return dev_addr;
@@ -612,7 +602,7 @@ swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr,
char *dma_addr = bus_to_virt(dev_addr);
BUG_ON(dir == DMA_NONE);
- if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end)
+ if (is_swiotlb_buffer(dma_addr))
unmap_single(hwdev, dma_addr, size, dir);
else if (dir == DMA_FROM_DEVICE)
dma_mark_clean(dma_addr, size);
@@ -642,7 +632,7 @@ swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
char *dma_addr = bus_to_virt(dev_addr);
BUG_ON(dir == DMA_NONE);
- if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end)
+ if (is_swiotlb_buffer(dma_addr))
sync_single(hwdev, dma_addr, size, dir, target);
else if (dir == DMA_FROM_DEVICE)
dma_mark_clean(dma_addr, size);
@@ -673,7 +663,7 @@ swiotlb_sync_single_range(struct device *hwdev, dma_addr_t dev_addr,
char *dma_addr = bus_to_virt(dev_addr) + offset;
BUG_ON(dir == DMA_NONE);
- if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end)
+ if (is_swiotlb_buffer(dma_addr))
sync_single(hwdev, dma_addr, size, dir, target);
else if (dir == DMA_FROM_DEVICE)
dma_mark_clean(dma_addr, size);
@@ -727,7 +717,8 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
for_each_sg(sgl, sg, nelems, i) {
addr = SG_ENT_VIRT_ADDRESS(sg);
dev_addr = virt_to_bus(addr);
- if (swiotlb_force || address_needs_mapping(hwdev, dev_addr)) {
+ if (swiotlb_force ||
+ address_needs_mapping(hwdev, dev_addr, sg->length)) {
void *map = map_single(hwdev, addr, sg->length, dir);
if (!map) {
/* Don't panic here, we expect map_sg users
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index c399bc1093c..a013bbc2371 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -24,6 +24,7 @@
#include <linux/kernel.h>
#include <linux/kallsyms.h>
#include <linux/uaccess.h>
+#include <linux/ioport.h>
#include <asm/page.h> /* for PAGE_SIZE */
#include <asm/div64.h>
@@ -32,40 +33,48 @@
/* Works only for digits and letters, but small and fast */
#define TOLOWER(x) ((x) | 0x20)
+static unsigned int simple_guess_base(const char *cp)
+{
+ if (cp[0] == '0') {
+ if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2]))
+ return 16;
+ else
+ return 8;
+ } else {
+ return 10;
+ }
+}
+
/**
* simple_strtoul - convert a string to an unsigned long
* @cp: The start of the string
* @endp: A pointer to the end of the parsed string will be placed here
* @base: The number base to use
*/
-unsigned long simple_strtoul(const char *cp,char **endp,unsigned int base)
+unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
{
- unsigned long result = 0,value;
+ unsigned long result = 0;
- if (!base) {
- base = 10;
- if (*cp == '0') {
- base = 8;
- cp++;
- if ((TOLOWER(*cp) == 'x') && isxdigit(cp[1])) {
- cp++;
- base = 16;
- }
- }
- } else if (base == 16) {
- if (cp[0] == '0' && TOLOWER(cp[1]) == 'x')
- cp += 2;
- }
- while (isxdigit(*cp) &&
- (value = isdigit(*cp) ? *cp-'0' : TOLOWER(*cp)-'a'+10) < base) {
- result = result*base + value;
+ if (!base)
+ base = simple_guess_base(cp);
+
+ if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
+ cp += 2;
+
+ while (isxdigit(*cp)) {
+ unsigned int value;
+
+ value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
+ if (value >= base)
+ break;
+ result = result * base + value;
cp++;
}
+
if (endp)
*endp = (char *)cp;
return result;
}
-
EXPORT_SYMBOL(simple_strtoul);
/**
@@ -74,13 +83,12 @@ EXPORT_SYMBOL(simple_strtoul);
* @endp: A pointer to the end of the parsed string will be placed here
* @base: The number base to use
*/
-long simple_strtol(const char *cp,char **endp,unsigned int base)
+long simple_strtol(const char *cp, char **endp, unsigned int base)
{
- if(*cp=='-')
- return -simple_strtoul(cp+1,endp,base);
- return simple_strtoul(cp,endp,base);
+ if(*cp == '-')
+ return -simple_strtoul(cp + 1, endp, base);
+ return simple_strtoul(cp, endp, base);
}
-
EXPORT_SYMBOL(simple_strtol);
/**
@@ -89,34 +97,30 @@ EXPORT_SYMBOL(simple_strtol);
* @endp: A pointer to the end of the parsed string will be placed here
* @base: The number base to use
*/
-unsigned long long simple_strtoull(const char *cp,char **endp,unsigned int base)
+unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base)
{
- unsigned long long result = 0,value;
+ unsigned long long result = 0;
- if (!base) {
- base = 10;
- if (*cp == '0') {
- base = 8;
- cp++;
- if ((TOLOWER(*cp) == 'x') && isxdigit(cp[1])) {
- cp++;
- base = 16;
- }
- }
- } else if (base == 16) {
- if (cp[0] == '0' && TOLOWER(cp[1]) == 'x')
- cp += 2;
- }
- while (isxdigit(*cp)
- && (value = isdigit(*cp) ? *cp-'0' : TOLOWER(*cp)-'a'+10) < base) {
- result = result*base + value;
+ if (!base)
+ base = simple_guess_base(cp);
+
+ if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
+ cp += 2;
+
+ while (isxdigit(*cp)) {
+ unsigned int value;
+
+ value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
+ if (value >= base)
+ break;
+ result = result * base + value;
cp++;
}
+
if (endp)
*endp = (char *)cp;
return result;
}
-
EXPORT_SYMBOL(simple_strtoull);
/**
@@ -125,14 +129,13 @@ EXPORT_SYMBOL(simple_strtoull);
* @endp: A pointer to the end of the parsed string will be placed here
* @base: The number base to use
*/
-long long simple_strtoll(const char *cp,char **endp,unsigned int base)
+long long simple_strtoll(const char *cp, char **endp, unsigned int base)
{
if(*cp=='-')
- return -simple_strtoull(cp+1,endp,base);
- return simple_strtoull(cp,endp,base);
+ return -simple_strtoull(cp + 1, endp, base);
+ return simple_strtoull(cp, endp, base);
}
-
/**
* strict_strtoul - convert a string to an unsigned long strictly
* @cp: The string to be converted
@@ -155,7 +158,27 @@ long long simple_strtoll(const char *cp,char **endp,unsigned int base)
* simple_strtoul just ignores the successive invalid characters and
* return the converted value of prefix part of the string.
*/
-int strict_strtoul(const char *cp, unsigned int base, unsigned long *res);
+int strict_strtoul(const char *cp, unsigned int base, unsigned long *res)
+{
+ char *tail;
+ unsigned long val;
+ size_t len;
+
+ *res = 0;
+ len = strlen(cp);
+ if (len == 0)
+ return -EINVAL;
+
+ val = simple_strtoul(cp, &tail, base);
+ if ((*tail == '\0') ||
+ ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
+ *res = val;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL(strict_strtoul);
/**
* strict_strtol - convert a string to a long strictly
@@ -169,7 +192,20 @@ int strict_strtoul(const char *cp, unsigned int base, unsigned long *res);
* It returns 0 if conversion is successful and *res is set to the converted
* value, otherwise it returns -EINVAL and *res is set to 0.
*/
-int strict_strtol(const char *cp, unsigned int base, long *res);
+int strict_strtol(const char *cp, unsigned int base, long *res)
+{
+ int ret;
+ if (*cp == '-') {
+ ret = strict_strtoul(cp + 1, base, (unsigned long *)res);
+ if (!ret)
+ *res = -(*res);
+ } else {
+ ret = strict_strtoul(cp, base, (unsigned long *)res);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(strict_strtol);
/**
* strict_strtoull - convert a string to an unsigned long long strictly
@@ -193,7 +229,27 @@ int strict_strtol(const char *cp, unsigned int base, long *res);
* simple_strtoull just ignores the successive invalid characters and
* return the converted value of prefix part of the string.
*/
-int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res);
+int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res)
+{
+ char *tail;
+ unsigned long long val;
+ size_t len;
+
+ *res = 0;
+ len = strlen(cp);
+ if (len == 0)
+ return -EINVAL;
+
+ val = simple_strtoull(cp, &tail, base);
+ if ((*tail == '\0') ||
+ ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
+ *res = val;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL(strict_strtoull);
/**
* strict_strtoll - convert a string to a long long strictly
@@ -207,53 +263,20 @@ int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res);
* It returns 0 if conversion is successful and *res is set to the converted
* value, otherwise it returns -EINVAL and *res is set to 0.
*/
-int strict_strtoll(const char *cp, unsigned int base, long long *res);
-
-#define define_strict_strtoux(type, valtype) \
-int strict_strtou##type(const char *cp, unsigned int base, valtype *res)\
-{ \
- char *tail; \
- valtype val; \
- size_t len; \
- \
- *res = 0; \
- len = strlen(cp); \
- if (len == 0) \
- return -EINVAL; \
- \
- val = simple_strtou##type(cp, &tail, base); \
- if ((*tail == '\0') || \
- ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {\
- *res = val; \
- return 0; \
- } \
- \
- return -EINVAL; \
-} \
-
-#define define_strict_strtox(type, valtype) \
-int strict_strto##type(const char *cp, unsigned int base, valtype *res) \
-{ \
- int ret; \
- if (*cp == '-') { \
- ret = strict_strtou##type(cp+1, base, res); \
- if (!ret) \
- *res = -(*res); \
- } else \
- ret = strict_strtou##type(cp, base, res); \
- \
- return ret; \
-} \
-
-define_strict_strtoux(l, unsigned long)
-define_strict_strtox(l, long)
-define_strict_strtoux(ll, unsigned long long)
-define_strict_strtox(ll, long long)
+int strict_strtoll(const char *cp, unsigned int base, long long *res)
+{
+ int ret;
+ if (*cp == '-') {
+ ret = strict_strtoull(cp + 1, base, (unsigned long long *)res);
+ if (!ret)
+ *res = -(*res);
+ } else {
+ ret = strict_strtoull(cp, base, (unsigned long long *)res);
+ }
-EXPORT_SYMBOL(strict_strtoul);
-EXPORT_SYMBOL(strict_strtol);
+ return ret;
+}
EXPORT_SYMBOL(strict_strtoll);
-EXPORT_SYMBOL(strict_strtoull);
static int skip_atoi(const char **s)
{
@@ -528,18 +551,51 @@ static char *symbol_string(char *buf, char *end, void *ptr, int field_width, int
#endif
}
+static char *resource_string(char *buf, char *end, struct resource *res, int field_width, int precision, int flags)
+{
+#ifndef IO_RSRC_PRINTK_SIZE
+#define IO_RSRC_PRINTK_SIZE 4
+#endif
+
+#ifndef MEM_RSRC_PRINTK_SIZE
+#define MEM_RSRC_PRINTK_SIZE 8
+#endif
+
+ /* room for the actual numbers, the two "0x", -, [, ] and the final zero */
+ char sym[4*sizeof(resource_size_t) + 8];
+ char *p = sym, *pend = sym + sizeof(sym);
+ int size = -1;
+
+ if (res->flags & IORESOURCE_IO)
+ size = IO_RSRC_PRINTK_SIZE;
+ else if (res->flags & IORESOURCE_MEM)
+ size = MEM_RSRC_PRINTK_SIZE;
+
+ *p++ = '[';
+ p = number(p, pend, res->start, 16, size, -1, SPECIAL | SMALL | ZEROPAD);
+ *p++ = '-';
+ p = number(p, pend, res->end, 16, size, -1, SPECIAL | SMALL | ZEROPAD);
+ *p++ = ']';
+ *p = 0;
+
+ return string(buf, end, sym, field_width, precision, flags);
+}
+
/*
* Show a '%p' thing. A kernel extension is that the '%p' is followed
* by an extra set of alphanumeric characters that are extended format
* specifiers.
*
- * Right now we just handle 'F' (for symbolic Function descriptor pointers)
- * and 'S' (for Symbolic direct pointers), but this can easily be
- * extended in the future (network address types etc).
+ * Right now we handle:
+ *
+ * - 'F' For symbolic function descriptor pointers
+ * - 'S' For symbolic direct pointers
+ * - 'R' For a struct resource pointer, it prints the range of
+ * addresses (not the name nor the flags)
*
- * The difference between 'S' and 'F' is that on ia64 and ppc64 function
- * pointers are really function descriptors, which contain a pointer the
- * real address.
+ * Note: The difference between 'S' and 'F' is that on ia64 and ppc64
+ * function pointers are really function descriptors, which contain a
+ * pointer to the real address.
*/
static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field_width, int precision, int flags)
{
@@ -549,6 +605,8 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field
/* Fallthrough */
case 'S':
return symbol_string(buf, end, ptr, field_width, precision, flags);
+ case 'R':
+ return resource_string(buf, end, ptr, field_width, precision, flags);
}
flags |= SMALL;
if (field_width == -1) {
@@ -565,6 +623,11 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field
* @fmt: The format string to use
* @args: Arguments for the format string
*
+ * This function follows C99 vsnprintf, but has some extensions:
+ * %pS output the name of a text symbol
+ * %pF output the name of a function pointer
+ * %pR output the address range in a struct resource
+ *
* The return value is the number of characters which would
* be generated for the given input, excluding the trailing
* '\0', as per ISO C99. If you want to have the exact
@@ -790,7 +853,6 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
/* the trailing null byte doesn't count towards the total */
return str-buf;
}
-
EXPORT_SYMBOL(vsnprintf);
/**
@@ -806,6 +868,8 @@ EXPORT_SYMBOL(vsnprintf);
*
* Call this function if you are already dealing with a va_list.
* You probably want scnprintf() instead.
+ *
+ * See the vsnprintf() documentation for format string extensions over C99.
*/
int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
{
@@ -814,7 +878,6 @@ int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
i=vsnprintf(buf,size,fmt,args);
return (i >= size) ? (size - 1) : i;
}
-
EXPORT_SYMBOL(vscnprintf);
/**
@@ -828,6 +891,8 @@ EXPORT_SYMBOL(vscnprintf);
* generated for the given input, excluding the trailing null,
* as per ISO C99. If the return is greater than or equal to
* @size, the resulting string is truncated.
+ *
+ * See the vsnprintf() documentation for format string extensions over C99.
*/
int snprintf(char * buf, size_t size, const char *fmt, ...)
{
@@ -839,7 +904,6 @@ int snprintf(char * buf, size_t size, const char *fmt, ...)
va_end(args);
return i;
}
-
EXPORT_SYMBOL(snprintf);
/**
@@ -877,12 +941,13 @@ EXPORT_SYMBOL(scnprintf);
*
* Call this function if you are already dealing with a va_list.
* You probably want sprintf() instead.
+ *
+ * See the vsnprintf() documentation for format string extensions over C99.
*/
int vsprintf(char *buf, const char *fmt, va_list args)
{
return vsnprintf(buf, INT_MAX, fmt, args);
}
-
EXPORT_SYMBOL(vsprintf);
/**
@@ -894,6 +959,8 @@ EXPORT_SYMBOL(vsprintf);
* The function returns the number of characters written
* into @buf. Use snprintf() or scnprintf() in order to avoid
* buffer overflows.
+ *
+ * See the vsnprintf() documentation for format string extensions over C99.
*/
int sprintf(char * buf, const char *fmt, ...)
{
@@ -905,7 +972,6 @@ int sprintf(char * buf, const char *fmt, ...)
va_end(args);
return i;
}
-
EXPORT_SYMBOL(sprintf);
/**
@@ -1134,7 +1200,6 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
return num;
}
-
EXPORT_SYMBOL(vsscanf);
/**
@@ -1153,5 +1218,4 @@ int sscanf(const char * buf, const char * fmt, ...)
va_end(args);
return i;
}
-
EXPORT_SYMBOL(sscanf);
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-16 20:13:32 +0000