aboutsummaryrefslogtreecommitdiff
path: root/lib
diff options
context:
space:
mode:
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig15
-rw-r--r--lib/Makefile1
-rw-r--r--lib/bust_spinlocks.c2
-rw-r--r--lib/cpumask.c62
-rw-r--r--lib/dynamic_printk.c58
-rw-r--r--lib/fault-inject.c1
-rw-r--r--lib/find_last_bit.c45
-rw-r--r--lib/klist.c43
-rw-r--r--lib/kobject_uevent.c8
-rw-r--r--lib/percpu_counter.c36
-rw-r--r--lib/prio_heap.c2
-rw-r--r--lib/proportions.c8
-rw-r--r--lib/radix-tree.c13
-rw-r--r--lib/swiotlb.c240
-rw-r--r--lib/vsprintf.c7
15 files changed, 332 insertions, 209 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index fd4118e097f..03c2c24b908 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -13,6 +13,10 @@ config GENERIC_FIND_FIRST_BIT
config GENERIC_FIND_NEXT_BIT
bool
+config GENERIC_FIND_LAST_BIT
+ bool
+ default y
+
config CRC_CCITT
tristate "CRC-CCITT functions"
help
@@ -159,4 +163,15 @@ config CHECK_SIGNATURE
config HAVE_LMB
boolean
+config CPUMASK_OFFSTACK
+ bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
+ help
+ Use dynamic allocation for cpumask_var_t, instead of putting
+ them on the stack. This is a bit more expensive, but avoids
+ stack overflow.
+
+config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
+ bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
+ depends on EXPERIMENTAL && BROKEN
+
endmenu
diff --git a/lib/Makefile b/lib/Makefile
index 80fe8a3ec12..32b0e64ded2 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -37,6 +37,7 @@ lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
lib-$(CONFIG_GENERIC_FIND_FIRST_BIT) += find_next_bit.o
lib-$(CONFIG_GENERIC_FIND_NEXT_BIT) += find_next_bit.o
+lib-$(CONFIG_GENERIC_FIND_LAST_BIT) += find_last_bit.o
obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o
obj-$(CONFIG_LOCK_KERNEL) += kernel_lock.o
obj-$(CONFIG_PLIST) += plist.o
diff --git a/lib/bust_spinlocks.c b/lib/bust_spinlocks.c
index 486da62b2b0..9681d54b95d 100644
--- a/lib/bust_spinlocks.c
+++ b/lib/bust_spinlocks.c
@@ -12,6 +12,7 @@
#include <linux/tty.h>
#include <linux/wait.h>
#include <linux/vt_kern.h>
+#include <linux/console.h>
void __attribute__((weak)) bust_spinlocks(int yes)
@@ -22,6 +23,7 @@ void __attribute__((weak)) bust_spinlocks(int yes)
#ifdef CONFIG_VT
unblank_screen();
#endif
+ console_unblank();
if (--oops_in_progress == 0)
wake_up_klogd();
}
diff --git a/lib/cpumask.c b/lib/cpumask.c
index 8d03f22c6ce..3389e2440da 100644
--- a/lib/cpumask.c
+++ b/lib/cpumask.c
@@ -76,15 +76,28 @@ int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)
/* These are not inline because of header tangles. */
#ifdef CONFIG_CPUMASK_OFFSTACK
-bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
+/**
+ * alloc_cpumask_var_node - allocate a struct cpumask on a given node
+ * @mask: pointer to cpumask_var_t where the cpumask is returned
+ * @flags: GFP_ flags
+ *
+ * Only defined when CONFIG_CPUMASK_OFFSTACK=y, otherwise is
+ * a nop returning a constant 1 (in <linux/cpumask.h>)
+ * Returns TRUE if memory allocation succeeded, FALSE otherwise.
+ *
+ * In addition, mask will be NULL if this fails. Note that gcc is
+ * usually smart enough to know that mask can never be NULL if
+ * CONFIG_CPUMASK_OFFSTACK=n, so does code elimination in that case
+ * too.
+ */
+bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node)
{
if (likely(slab_is_available()))
- *mask = kmalloc(cpumask_size(), flags);
+ *mask = kmalloc_node(cpumask_size(), flags, node);
else {
#ifdef CONFIG_DEBUG_PER_CPU_MAPS
printk(KERN_ERR
"=> alloc_cpumask_var: kmalloc not available!\n");
- dump_stack();
#endif
*mask = NULL;
}
@@ -94,21 +107,64 @@ bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
dump_stack();
}
#endif
+ /* FIXME: Bandaid to save us from old primitives which go to NR_CPUS. */
+ if (*mask) {
+ unsigned int tail;
+ tail = BITS_TO_LONGS(NR_CPUS - nr_cpumask_bits) * sizeof(long);
+ memset(cpumask_bits(*mask) + cpumask_size() - tail,
+ 0, tail);
+ }
+
return *mask != NULL;
}
+EXPORT_SYMBOL(alloc_cpumask_var_node);
+
+/**
+ * alloc_cpumask_var - allocate a struct cpumask
+ * @mask: pointer to cpumask_var_t where the cpumask is returned
+ * @flags: GFP_ flags
+ *
+ * Only defined when CONFIG_CPUMASK_OFFSTACK=y, otherwise is
+ * a nop returning a constant 1 (in <linux/cpumask.h>).
+ *
+ * See alloc_cpumask_var_node.
+ */
+bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
+{
+ return alloc_cpumask_var_node(mask, flags, numa_node_id());
+}
EXPORT_SYMBOL(alloc_cpumask_var);
+/**
+ * alloc_bootmem_cpumask_var - allocate a struct cpumask from the bootmem arena.
+ * @mask: pointer to cpumask_var_t where the cpumask is returned
+ *
+ * Only defined when CONFIG_CPUMASK_OFFSTACK=y, otherwise is
+ * a nop (in <linux/cpumask.h>).
+ * Either returns an allocated (zero-filled) cpumask, or causes the
+ * system to panic.
+ */
void __init alloc_bootmem_cpumask_var(cpumask_var_t *mask)
{
*mask = alloc_bootmem(cpumask_size());
}
+/**
+ * free_cpumask_var - frees memory allocated for a struct cpumask.
+ * @mask: cpumask to free
+ *
+ * This is safe on a NULL mask.
+ */
void free_cpumask_var(cpumask_var_t mask)
{
kfree(mask);
}
EXPORT_SYMBOL(free_cpumask_var);
+/**
+ * free_bootmem_cpumask_var - frees result of alloc_bootmem_cpumask_var
+ * @mask: cpumask to free
+ */
void __init free_bootmem_cpumask_var(cpumask_var_t mask)
{
free_bootmem((unsigned long)mask, cpumask_size());
diff --git a/lib/dynamic_printk.c b/lib/dynamic_printk.c
index 8e30295e856..165a19763dc 100644
--- a/lib/dynamic_printk.c
+++ b/lib/dynamic_printk.c
@@ -277,40 +277,34 @@ static ssize_t pr_debug_write(struct file *file, const char __user *buf,
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\n",
- elem->name);
- } else if (!value && (elem->enable == 1)) {
- elem->enable = 0;
- num_enabled--;
- if (disabled_hash(elem->hash1, true))
- dynamic_printk_enabled &=
+ } 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\n",
+ 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 &=
+ 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\n", elem->name);
- }
+ if (num_enabled)
+ dynamic_enabled = DYNAMIC_ENABLED_SOME;
+ else
+ dynamic_enabled = DYNAMIC_ENABLED_NONE;
+ err = 0;
+ printk(KERN_DEBUG
+ "debugging disabled for module %s\n",
+ elem->name);
}
}
}
diff --git a/lib/fault-inject.c b/lib/fault-inject.c
index a50a311554c..f97af55bdd9 100644
--- a/lib/fault-inject.c
+++ b/lib/fault-inject.c
@@ -6,7 +6,6 @@
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/interrupt.h>
-#include <linux/unwind.h>
#include <linux/stacktrace.h>
#include <linux/kallsyms.h>
#include <linux/fault-inject.h>
diff --git a/lib/find_last_bit.c b/lib/find_last_bit.c
new file mode 100644
index 00000000000..5d202e36bdd
--- /dev/null
+++ b/lib/find_last_bit.c
@@ -0,0 +1,45 @@
+/* find_last_bit.c: fallback find next bit implementation
+ *
+ * Copyright (C) 2008 IBM Corporation
+ * Written by Rusty Russell <rusty@rustcorp.com.au>
+ * (Inspired by David Howell's find_next_bit implementation)
+ *
+ * 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.
+ */
+
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <asm/types.h>
+#include <asm/byteorder.h>
+
+unsigned long find_last_bit(const unsigned long *addr, unsigned long size)
+{
+ unsigned long words;
+ unsigned long tmp;
+
+ /* Start at final word. */
+ words = size / BITS_PER_LONG;
+
+ /* Partial final word? */
+ if (size & (BITS_PER_LONG-1)) {
+ tmp = (addr[words] & (~0UL >> (BITS_PER_LONG
+ - (size & (BITS_PER_LONG-1)))));
+ if (tmp)
+ goto found;
+ }
+
+ while (words) {
+ tmp = addr[--words];
+ if (tmp) {
+found:
+ return words * BITS_PER_LONG + __fls(tmp);
+ }
+ }
+
+ /* Not found */
+ return size;
+}
+EXPORT_SYMBOL(find_last_bit);
diff --git a/lib/klist.c b/lib/klist.c
index bbdd3015c2c..573d6068a42 100644
--- a/lib/klist.c
+++ b/lib/klist.c
@@ -36,6 +36,7 @@
#include <linux/klist.h>
#include <linux/module.h>
+#include <linux/sched.h>
/*
* Use the lowest bit of n_klist to mark deleted nodes and exclude
@@ -108,7 +109,6 @@ static void add_tail(struct klist *k, struct klist_node *n)
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);
knode_set_klist(n, k);
if (k->get)
@@ -171,13 +171,34 @@ void klist_add_before(struct klist_node *n, struct klist_node *pos)
}
EXPORT_SYMBOL_GPL(klist_add_before);
+struct klist_waiter {
+ struct list_head list;
+ struct klist_node *node;
+ struct task_struct *process;
+ int woken;
+};
+
+static DEFINE_SPINLOCK(klist_remove_lock);
+static LIST_HEAD(klist_remove_waiters);
+
static void klist_release(struct kref *kref)
{
+ struct klist_waiter *waiter, *tmp;
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);
+ spin_lock(&klist_remove_lock);
+ list_for_each_entry_safe(waiter, tmp, &klist_remove_waiters, list) {
+ if (waiter->node != n)
+ continue;
+
+ waiter->woken = 1;
+ mb();
+ wake_up_process(waiter->process);
+ list_del(&waiter->list);
+ }
+ spin_unlock(&klist_remove_lock);
knode_set_klist(n, NULL);
}
@@ -217,8 +238,24 @@ EXPORT_SYMBOL_GPL(klist_del);
*/
void klist_remove(struct klist_node *n)
{
+ struct klist_waiter waiter;
+
+ waiter.node = n;
+ waiter.process = current;
+ waiter.woken = 0;
+ spin_lock(&klist_remove_lock);
+ list_add(&waiter.list, &klist_remove_waiters);
+ spin_unlock(&klist_remove_lock);
+
klist_del(n);
- wait_for_completion(&n->n_removed);
+
+ for (;;) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ if (waiter.woken)
+ break;
+ schedule();
+ }
+ __set_current_state(TASK_RUNNING);
}
EXPORT_SYMBOL_GPL(klist_remove);
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 3f914725bda..318328ddbd1 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -165,7 +165,7 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
/* keys passed in from the caller */
if (envp_ext) {
for (i = 0; envp_ext[i]; i++) {
- retval = add_uevent_var(env, envp_ext[i]);
+ retval = add_uevent_var(env, "%s", envp_ext[i]);
if (retval)
goto exit;
}
@@ -225,8 +225,10 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
}
NETLINK_CB(skb).dst_group = 1;
- netlink_broadcast(uevent_sock, skb, 0, 1, GFP_KERNEL);
- }
+ retval = netlink_broadcast(uevent_sock, skb, 0, 1,
+ GFP_KERNEL);
+ } else
+ retval = -ENOMEM;
}
#endif
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index b255b939bc1..aeaa6d73444 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -9,10 +9,8 @@
#include <linux/cpu.h>
#include <linux/module.h>
-#ifdef CONFIG_HOTPLUG_CPU
static LIST_HEAD(percpu_counters);
static DEFINE_MUTEX(percpu_counters_lock);
-#endif
void percpu_counter_set(struct percpu_counter *fbc, s64 amount)
{
@@ -68,11 +66,11 @@ s64 __percpu_counter_sum(struct percpu_counter *fbc)
}
EXPORT_SYMBOL(__percpu_counter_sum);
-static struct lock_class_key percpu_counter_irqsafe;
-
-int percpu_counter_init(struct percpu_counter *fbc, s64 amount)
+int __percpu_counter_init(struct percpu_counter *fbc, s64 amount,
+ struct lock_class_key *key)
{
spin_lock_init(&fbc->lock);
+ lockdep_set_class(&fbc->lock, key);
fbc->count = amount;
fbc->counters = alloc_percpu(s32);
if (!fbc->counters)
@@ -84,17 +82,7 @@ int percpu_counter_init(struct percpu_counter *fbc, s64 amount)
#endif
return 0;
}
-EXPORT_SYMBOL(percpu_counter_init);
-
-int percpu_counter_init_irq(struct percpu_counter *fbc, s64 amount)
-{
- int err;
-
- err = percpu_counter_init(fbc, amount);
- if (!err)
- lockdep_set_class(&fbc->lock, &percpu_counter_irqsafe);
- return err;
-}
+EXPORT_SYMBOL(__percpu_counter_init);
void percpu_counter_destroy(struct percpu_counter *fbc)
{
@@ -111,13 +99,24 @@ void percpu_counter_destroy(struct percpu_counter *fbc)
}
EXPORT_SYMBOL(percpu_counter_destroy);
-#ifdef CONFIG_HOTPLUG_CPU
+int percpu_counter_batch __read_mostly = 32;
+EXPORT_SYMBOL(percpu_counter_batch);
+
+static void compute_batch_value(void)
+{
+ int nr = num_online_cpus();
+
+ percpu_counter_batch = max(32, nr*2);
+}
+
static int __cpuinit percpu_counter_hotcpu_callback(struct notifier_block *nb,
unsigned long action, void *hcpu)
{
+#ifdef CONFIG_HOTPLUG_CPU
unsigned int cpu;
struct percpu_counter *fbc;
+ compute_batch_value();
if (action != CPU_DEAD)
return NOTIFY_OK;
@@ -134,13 +133,14 @@ static int __cpuinit percpu_counter_hotcpu_callback(struct notifier_block *nb,
spin_unlock_irqrestore(&fbc->lock, flags);
}
mutex_unlock(&percpu_counters_lock);
+#endif
return NOTIFY_OK;
}
static int __init percpu_counter_startup(void)
{
+ compute_batch_value();
hotcpu_notifier(percpu_counter_hotcpu_callback, 0);
return 0;
}
module_init(percpu_counter_startup);
-#endif
diff --git a/lib/prio_heap.c b/lib/prio_heap.c
index 471944a54e2..a7af6f85eca 100644
--- a/lib/prio_heap.c
+++ b/lib/prio_heap.c
@@ -31,7 +31,7 @@ void *heap_insert(struct ptr_heap *heap, void *p)
if (heap->size < heap->max) {
/* Heap insertion */
- int pos = heap->size++;
+ pos = heap->size++;
while (pos > 0 && heap->gt(p, ptrs[(pos-1)/2])) {
ptrs[pos] = ptrs[(pos-1)/2];
pos = (pos-1)/2;
diff --git a/lib/proportions.c b/lib/proportions.c
index 4f387a643d7..d50746a79de 100644
--- a/lib/proportions.c
+++ b/lib/proportions.c
@@ -83,11 +83,11 @@ int prop_descriptor_init(struct prop_descriptor *pd, int shift)
pd->index = 0;
pd->pg[0].shift = shift;
mutex_init(&pd->mutex);
- err = percpu_counter_init_irq(&pd->pg[0].events, 0);
+ err = percpu_counter_init(&pd->pg[0].events, 0);
if (err)
goto out;
- err = percpu_counter_init_irq(&pd->pg[1].events, 0);
+ err = percpu_counter_init(&pd->pg[1].events, 0);
if (err)
percpu_counter_destroy(&pd->pg[0].events);
@@ -147,6 +147,7 @@ out:
* this is used to track the active references.
*/
static struct prop_global *prop_get_global(struct prop_descriptor *pd)
+__acquires(RCU)
{
int index;
@@ -160,6 +161,7 @@ static struct prop_global *prop_get_global(struct prop_descriptor *pd)
}
static void prop_put_global(struct prop_descriptor *pd, struct prop_global *pg)
+__releases(RCU)
{
rcu_read_unlock();
}
@@ -191,7 +193,7 @@ int prop_local_init_percpu(struct prop_local_percpu *pl)
spin_lock_init(&pl->lock);
pl->shift = 0;
pl->period = 0;
- return percpu_counter_init_irq(&pl->events, 0);
+ return percpu_counter_init(&pl->events, 0);
}
void prop_local_destroy_percpu(struct prop_local_percpu *pl)
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index be86b32bc87..4bb42a0344e 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -81,7 +81,7 @@ struct radix_tree_preload {
int nr;
struct radix_tree_node *nodes[RADIX_TREE_MAX_PATH];
};
-DEFINE_PER_CPU(struct radix_tree_preload, radix_tree_preloads) = { 0, };
+static DEFINE_PER_CPU(struct radix_tree_preload, radix_tree_preloads) = { 0, };
static inline gfp_t root_gfp_mask(struct radix_tree_root *root)
{
@@ -640,13 +640,14 @@ EXPORT_SYMBOL(radix_tree_tag_get);
*
* Returns: the index of the hole if found, otherwise returns an index
* outside of the set specified (in which case 'return - index >= max_scan'
- * will be true).
+ * will be true). In rare cases of index wrap-around, 0 will be returned.
*
* radix_tree_next_hole may be called under rcu_read_lock. However, like
- * radix_tree_gang_lookup, this will not atomically search a snapshot of the
- * tree at a single point in time. For example, if a hole is created at index
- * 5, then subsequently a hole is created at index 10, radix_tree_next_hole
- * covering both indexes may return 10 if called under rcu_read_lock.
+ * radix_tree_gang_lookup, this will not atomically search a snapshot of
+ * the tree at a single point in time. For example, if a hole is created
+ * at index 5, then subsequently a hole is created at index 10,
+ * radix_tree_next_hole covering both indexes may return 10 if called
+ * under rcu_read_lock.
*/
unsigned long radix_tree_next_hole(struct radix_tree_root *root,
unsigned long index, unsigned long max_scan)
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index fa2dc4e5f9b..1f991acc2a0 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -14,6 +14,7 @@
* 04/07/.. ak Better overflow handling. Assorted fixes.
* 05/09/10 linville Add support for syncing ranges, support syncing for
* DMA_BIDIRECTIONAL mappings, miscellaneous cleanup.
+ * 08/12/11 beckyb Add highmem support
*/
#include <linux/cache.h>
@@ -21,9 +22,9 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/spinlock.h>
-#include <linux/swiotlb.h>
#include <linux/string.h>
#include <linux/swiotlb.h>
+#include <linux/pfn.h>
#include <linux/types.h>
#include <linux/ctype.h>
#include <linux/highmem.h>
@@ -89,10 +90,7 @@ static unsigned int io_tlb_index;
* We need to save away the original address corresponding to a mapped entry
* for the sync operations.
*/
-static struct swiotlb_phys_addr {
- struct page *page;
- unsigned int offset;
-} *io_tlb_orig_addr;
+static phys_addr_t *io_tlb_orig_addr;
/*
* Protect the above data structures in the map and unmap calls
@@ -116,7 +114,7 @@ setup_io_tlb_npages(char *str)
__setup("swiotlb=", setup_io_tlb_npages);
/* make io_tlb_overflow tunable too? */
-void * __weak swiotlb_alloc_boot(size_t size, unsigned long nslabs)
+void * __weak __init swiotlb_alloc_boot(size_t size, unsigned long nslabs)
{
return alloc_bootmem_low_pages(size);
}
@@ -126,7 +124,7 @@ void * __weak swiotlb_alloc(unsigned order, unsigned long nslabs)
return (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, order);
}
-dma_addr_t __weak swiotlb_phys_to_bus(phys_addr_t paddr)
+dma_addr_t __weak swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr)
{
return paddr;
}
@@ -136,9 +134,10 @@ phys_addr_t __weak swiotlb_bus_to_phys(dma_addr_t baddr)
return baddr;
}
-static dma_addr_t swiotlb_virt_to_bus(volatile void *address)
+static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev,
+ volatile void *address)
{
- return swiotlb_phys_to_bus(virt_to_phys(address));
+ return swiotlb_phys_to_bus(hwdev, virt_to_phys(address));
}
static void *swiotlb_bus_to_virt(dma_addr_t address)
@@ -151,35 +150,18 @@ int __weak swiotlb_arch_range_needs_mapping(void *ptr, size_t size)
return 0;
}
-static dma_addr_t swiotlb_sg_to_bus(struct scatterlist *sg)
-{
- return swiotlb_phys_to_bus(page_to_phys(sg_page(sg)) + sg->offset);
-}
-
static void swiotlb_print_info(unsigned long bytes)
{
phys_addr_t pstart, pend;
- dma_addr_t bstart, bend;
pstart = virt_to_phys(io_tlb_start);
pend = virt_to_phys(io_tlb_end);
- bstart = swiotlb_phys_to_bus(pstart);
- bend = swiotlb_phys_to_bus(pend);
-
printk(KERN_INFO "Placing %luMB software IO TLB between %p - %p\n",
bytes >> 20, io_tlb_start, io_tlb_end);
- if (pstart != bstart || pend != bend)
- printk(KERN_INFO "software IO TLB at phys %#llx - %#llx"
- " bus %#llx - %#llx\n",
- (unsigned long long)pstart,
- (unsigned long long)pend,
- (unsigned long long)bstart,
- (unsigned long long)bend);
- else
- printk(KERN_INFO "software IO TLB at phys %#llx - %#llx\n",
- (unsigned long long)pstart,
- (unsigned long long)pend);
+ printk(KERN_INFO "software IO TLB at phys %#llx - %#llx\n",
+ (unsigned long long)pstart,
+ (unsigned long long)pend);
}
/*
@@ -215,7 +197,7 @@ swiotlb_init_with_default_size(size_t default_size)
for (i = 0; i < io_tlb_nslabs; i++)
io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE);
io_tlb_index = 0;
- io_tlb_orig_addr = alloc_bootmem(io_tlb_nslabs * sizeof(struct swiotlb_phys_addr));
+ io_tlb_orig_addr = alloc_bootmem(io_tlb_nslabs * sizeof(phys_addr_t));
/*
* Get the overflow emergency buffer
@@ -289,12 +271,14 @@ swiotlb_late_init_with_default_size(size_t default_size)
io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE);
io_tlb_index = 0;
- io_tlb_orig_addr = (struct swiotlb_phys_addr *)__get_free_pages(GFP_KERNEL,
- get_order(io_tlb_nslabs * sizeof(struct swiotlb_phys_addr)));
+ io_tlb_orig_addr = (phys_addr_t *)
+ __get_free_pages(GFP_KERNEL,
+ get_order(io_tlb_nslabs *
+ sizeof(phys_addr_t)));
if (!io_tlb_orig_addr)
goto cleanup3;
- memset(io_tlb_orig_addr, 0, io_tlb_nslabs * sizeof(struct swiotlb_phys_addr));
+ memset(io_tlb_orig_addr, 0, io_tlb_nslabs * sizeof(phys_addr_t));
/*
* Get the overflow emergency buffer
@@ -309,8 +293,8 @@ swiotlb_late_init_with_default_size(size_t default_size)
return 0;
cleanup4:
- free_pages((unsigned long)io_tlb_orig_addr, get_order(io_tlb_nslabs *
- sizeof(char *)));
+ free_pages((unsigned long)io_tlb_orig_addr,
+ get_order(io_tlb_nslabs * sizeof(phys_addr_t)));
io_tlb_orig_addr = NULL;
cleanup3:
free_pages((unsigned long)io_tlb_list, get_order(io_tlb_nslabs *
@@ -341,51 +325,44 @@ static int is_swiotlb_buffer(char *addr)
return addr >= io_tlb_start && addr < io_tlb_end;
}
-static struct swiotlb_phys_addr swiotlb_bus_to_phys_addr(char *dma_addr)
-{
- int index = (dma_addr - io_tlb_start) >> IO_TLB_SHIFT;
- struct swiotlb_phys_addr buffer = io_tlb_orig_addr[index];
- buffer.offset += (long)dma_addr & ((1 << IO_TLB_SHIFT) - 1);
- buffer.page += buffer.offset >> PAGE_SHIFT;
- buffer.offset &= PAGE_SIZE - 1;
- return buffer;
-}
-
-static void
-__sync_single(struct swiotlb_phys_addr buffer, char *dma_addr, size_t size, int dir)
-{
- if (PageHighMem(buffer.page)) {
- size_t len, bytes;
- char *dev, *host, *kmp;
-
- len = size;
- while (len != 0) {
- unsigned long flags;
-
- bytes = len;
- if ((bytes + buffer.offset) > PAGE_SIZE)
- bytes = PAGE_SIZE - buffer.offset;
- local_irq_save(flags); /* protects KM_BOUNCE_READ */
- kmp = kmap_atomic(buffer.page, KM_BOUNCE_READ);
- dev = dma_addr + size - len;
- host = kmp + buffer.offset;
- if (dir == DMA_FROM_DEVICE)
- memcpy(host, dev, bytes);
+/*
+ * Bounce: copy the swiotlb buffer back to the original dma location
+ */
+static void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size,
+ enum dma_data_direction dir)
+{
+ unsigned long pfn = PFN_DOWN(phys);
+
+ if (PageHighMem(pfn_to_page(pfn))) {
+ /* The buffer does not have a mapping. Map it in and copy */
+ unsigned int offset = phys & ~PAGE_MASK;
+ char *buffer;
+ unsigned int sz = 0;
+ unsigned long flags;
+
+ while (size) {
+ sz = min(PAGE_SIZE - offset, size);
+
+ local_irq_save(flags);
+ buffer = kmap_atomic(pfn_to_page(pfn),
+ KM_BOUNCE_READ);
+ if (dir == DMA_TO_DEVICE)
+ memcpy(dma_addr, buffer + offset, sz);
else
- memcpy(dev, host, bytes);
- kunmap_atomic(kmp, KM_BOUNCE_READ);
+ memcpy(buffer + offset, dma_addr, sz);
+ kunmap_atomic(buffer, KM_BOUNCE_READ);
local_irq_restore(flags);
- len -= bytes;
- buffer.page++;
- buffer.offset = 0;
+
+ size -= sz;
+ pfn++;
+ dma_addr += sz;
+ offset = 0;
}
} else {
- void *v = page_address(buffer.page) + buffer.offset;
-
if (dir == DMA_TO_DEVICE)
- memcpy(dma_addr, v, size);
+ memcpy(dma_addr, phys_to_virt(phys), size);
else
- memcpy(v, dma_addr, size);
+ memcpy(phys_to_virt(phys), dma_addr, size);
}
}
@@ -393,7 +370,7 @@ __sync_single(struct swiotlb_phys_addr buffer, char *dma_addr, size_t size, int
* Allocates bounce buffer and returns its kernel virtual address.
*/
static void *
-map_single(struct device *hwdev, struct swiotlb_phys_addr buffer, size_t size, int dir)
+map_single(struct device *hwdev, phys_addr_t phys, size_t size, int dir)
{
unsigned long flags;
char *dma_addr;
@@ -403,10 +380,9 @@ map_single(struct device *hwdev, struct swiotlb_phys_addr buffer, size_t size, i
unsigned long mask;
unsigned long offset_slots;
unsigned long max_slots;
- struct swiotlb_phys_addr slot_buf;
mask = dma_get_seg_boundary(hwdev);
- start_dma_addr = swiotlb_virt_to_bus(io_tlb_start) & mask;
+ start_dma_addr = swiotlb_virt_to_bus(hwdev, io_tlb_start) & mask;
offset_slots = ALIGN(start_dma_addr, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT;
@@ -488,15 +464,10 @@ found:
* This is needed when we sync the memory. Then we sync the buffer if
* needed.
*/
- slot_buf = buffer;
- for (i = 0; i < nslots; i++) {
- slot_buf.page += slot_buf.offset >> PAGE_SHIFT;
- slot_buf.offset &= PAGE_SIZE - 1;
- io_tlb_orig_addr[index+i] = slot_buf;
- slot_buf.offset += 1 << IO_TLB_SHIFT;
- }
+ for (i = 0; i < nslots; i++)
+ io_tlb_orig_addr[index+i] = phys + (i << IO_TLB_SHIFT);
if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL)
- __sync_single(buffer, dma_addr, size, DMA_TO_DEVICE);
+ swiotlb_bounce(phys, dma_addr, size, DMA_TO_DEVICE);
return dma_addr;
}
@@ -510,17 +481,13 @@ unmap_single(struct device *hwdev, char *dma_addr, size_t size, int dir)
unsigned long flags;
int i, count, nslots = ALIGN(size, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT;
int index = (dma_addr - io_tlb_start) >> IO_TLB_SHIFT;
- struct swiotlb_phys_addr buffer = swiotlb_bus_to_phys_addr(dma_addr);
+ phys_addr_t phys = io_tlb_orig_addr[index];
/*
* First, sync the memory before unmapping the entry
*/
- if ((dir == DMA_FROM_DEVICE) || (dir == DMA_BIDIRECTIONAL))
- /*
- * bounce... copy the data back into the original buffer * and
- * delete the bounce buffer.
- */
- __sync_single(buffer, dma_addr, size, DMA_FROM_DEVICE);
+ if (phys && ((dir == DMA_FROM_DEVICE) || (dir == DMA_BIDIRECTIONAL)))
+ swiotlb_bounce(phys, dma_addr, size, DMA_FROM_DEVICE);
/*
* Return the buffer to the free list by setting the corresponding
@@ -552,18 +519,21 @@ static void
sync_single(struct device *hwdev, char *dma_addr, size_t size,
int dir, int target)
{
- struct swiotlb_phys_addr buffer = swiotlb_bus_to_phys_addr(dma_addr);
+ int index = (dma_addr - io_tlb_start) >> IO_TLB_SHIFT;
+ phys_addr_t phys = io_tlb_orig_addr[index];
+
+ phys += ((unsigned long)dma_addr & ((1 << IO_TLB_SHIFT) - 1));
switch (target) {
case SYNC_FOR_CPU:
if (likely(dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
- __sync_single(buffer, dma_addr, size, DMA_FROM_DEVICE);
+ swiotlb_bounce(phys, dma_addr, size, DMA_FROM_DEVICE);
else
BUG_ON(dir != DMA_TO_DEVICE);
break;
case SYNC_FOR_DEVICE:
if (likely(dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL))
- __sync_single(buffer, dma_addr, size, DMA_TO_DEVICE);
+ swiotlb_bounce(phys, dma_addr, size, DMA_TO_DEVICE);
else
BUG_ON(dir != DMA_FROM_DEVICE);
break;
@@ -585,7 +555,9 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_mask = hwdev->coherent_dma_mask;
ret = (void *)__get_free_pages(flags, order);
- if (ret && !is_buffer_dma_capable(dma_mask, swiotlb_virt_to_bus(ret), size)) {
+ if (ret &&
+ !is_buffer_dma_capable(dma_mask, swiotlb_virt_to_bus(hwdev, ret),
+ size)) {
/*
* The allocated memory isn't reachable by the device.
* Fall back on swiotlb_map_single().
@@ -600,16 +572,13 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
* swiotlb_map_single(), which will grab memory from
* the lowest available address range.
*/
- struct swiotlb_phys_addr buffer;
- buffer.page = virt_to_page(NULL);
- buffer.offset = 0;
- ret = map_single(hwdev, buffer, size, DMA_FROM_DEVICE);
+ ret = map_single(hwdev, 0, size, DMA_FROM_DEVICE);
if (!ret)
return NULL;
}
memset(ret, 0, size);
- dev_addr = swiotlb_virt_to_bus(ret);
+ dev_addr = swiotlb_virt_to_bus(hwdev, ret);
/* Confirm address can be DMA'd by device */
if (!is_buffer_dma_capable(dma_mask, dev_addr, size)) {
@@ -624,6 +593,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
*dma_handle = dev_addr;
return ret;
}
+EXPORT_SYMBOL(swiotlb_alloc_coherent);
void
swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
@@ -636,6 +606,7 @@ swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
/* DMA_TO_DEVICE to avoid memcpy in unmap_single */
unmap_single(hwdev, vaddr, size, DMA_TO_DEVICE);
}
+EXPORT_SYMBOL(swiotlb_free_coherent);
static void
swiotlb_full(struct device *dev, size_t size, int dir, int do_panic)
@@ -648,7 +619,7 @@ swiotlb_full(struct device *dev, size_t size, int dir, int do_panic)
* the damage, or panic when the transfer is too big.
*/
printk(KERN_ERR "DMA: Out of SW-IOMMU space for %zu bytes at "
- "device %s\n", size, dev ? dev->bus_id : "?");
+ "device %s\n", size, dev ? dev_name(dev) : "?");
if (size > io_tlb_overflow && do_panic) {
if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)
@@ -669,9 +640,8 @@ dma_addr_t
swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
int dir, struct dma_attrs *attrs)
{
- dma_addr_t dev_addr = swiotlb_virt_to_bus(ptr);
+ dma_addr_t dev_addr = swiotlb_virt_to_bus(hwdev, ptr);
void *map;
- struct swiotlb_phys_addr buffer;
BUG_ON(dir == DMA_NONE);
/*
@@ -686,15 +656,13 @@ swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
/*
* Oh well, have to allocate and map a bounce buffer.
*/
- buffer.page = virt_to_page(ptr);
- buffer.offset = (unsigned long)ptr & ~PAGE_MASK;
- map = map_single(hwdev, buffer, size, dir);
+ map = map_single(hwdev, virt_to_phys(ptr), size, dir);
if (!map) {
swiotlb_full(hwdev, size, dir, 1);
map = io_tlb_overflow_buffer;
}
- dev_addr = swiotlb_virt_to_bus(map);
+ dev_addr = swiotlb_virt_to_bus(hwdev, map);
/*
* Ensure that the address returned is DMA'ble
@@ -711,6 +679,7 @@ swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir)
{
return swiotlb_map_single_attrs(hwdev, ptr, size, dir, NULL);
}
+EXPORT_SYMBOL(swiotlb_map_single);
/*
* Unmap a single streaming mode DMA translation. The dma_addr and size must
@@ -740,6 +709,8 @@ swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, size_t size,
{
return swiotlb_unmap_single_attrs(hwdev, dev_addr, size, dir, NULL);
}
+EXPORT_SYMBOL(swiotlb_unmap_single);
+
/*
* Make physical memory consistent for a single streaming mode DMA translation
* after a transfer.
@@ -769,6 +740,7 @@ swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
{
swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_CPU);
}
+EXPORT_SYMBOL(swiotlb_sync_single_for_cpu);
void
swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
@@ -776,6 +748,7 @@ swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
{
swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_DEVICE);
}
+EXPORT_SYMBOL(swiotlb_sync_single_for_device);
/*
* Same as above, but for a sub-range of the mapping.
@@ -801,6 +774,7 @@ swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
swiotlb_sync_single_range(hwdev, dev_addr, offset, size, dir,
SYNC_FOR_CPU);
}
+EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_cpu);
void
swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
@@ -809,9 +783,8 @@ swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
swiotlb_sync_single_range(hwdev, dev_addr, offset, size, dir,
SYNC_FOR_DEVICE);
}
+EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_device);
-void swiotlb_unmap_sg_attrs(struct device *, struct scatterlist *, int, int,
- struct dma_attrs *);
/*
* Map a set of buffers described by scatterlist in streaming mode for DMA.
* This is the scatter-gather version of the above swiotlb_map_single
@@ -833,20 +806,18 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
int dir, struct dma_attrs *attrs)
{
struct scatterlist *sg;
- struct swiotlb_phys_addr buffer;
- dma_addr_t dev_addr;
int i;
BUG_ON(dir == DMA_NONE);
for_each_sg(sgl, sg, nelems, i) {
- dev_addr = swiotlb_sg_to_bus(sg);
- if (range_needs_mapping(sg_virt(sg), sg->length) ||
+ void *addr = sg_virt(sg);
+ dma_addr_t dev_addr = swiotlb_virt_to_bus(hwdev, addr);
+
+ if (range_needs_mapping(addr, sg->length) ||
address_needs_mapping(hwdev, dev_addr, sg->length)) {
- void *map;
- buffer.page = sg_page(sg);
- buffer.offset = sg->offset;
- map = map_single(hwdev, buffer, sg->length, dir);
+ void *map = map_single(hwdev, sg_phys(sg),
+ sg->length, dir);
if (!map) {
/* Don't panic here, we expect map_sg users
to do proper error handling. */
@@ -856,7 +827,7 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
sgl[0].dma_length = 0;
return 0;
}
- sg->dma_address = swiotlb_virt_to_bus(map);
+ sg->dma_address = swiotlb_virt_to_bus(hwdev, map);
} else
sg->dma_address = dev_addr;
sg->dma_length = sg->length;
@@ -871,6 +842,7 @@ swiotlb_map_sg(struct device *hwdev, struct scatterlist *sgl, int nelems,
{
return swiotlb_map_sg_attrs(hwdev, sgl, nelems, dir, NULL);
}
+EXPORT_SYMBOL(swiotlb_map_sg);
/*
* Unmap a set of streaming mode DMA translations. Again, cpu read rules
@@ -886,11 +858,11 @@ swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
BUG_ON(dir == DMA_NONE);
for_each_sg(sgl, sg, nelems, i) {
- if (sg->dma_address != swiotlb_sg_to_bus(sg))
+ if (sg->dma_address != swiotlb_virt_to_bus(hwdev, sg_virt(sg)))
unmap_single(hwdev, swiotlb_bus_to_virt(sg->dma_address),
sg->dma_length, dir);
else if (dir == DMA_FROM_DEVICE)
- dma_mark_clean(swiotlb_bus_to_virt(sg->dma_address), sg->dma_length);
+ dma_mark_clean(sg_virt(sg), sg->dma_length);
}
}
EXPORT_SYMBOL(swiotlb_unmap_sg_attrs);
@@ -901,6 +873,7 @@ swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sgl, int nelems,
{
return swiotlb_unmap_sg_attrs(hwdev, sgl, nelems, dir, NULL);
}
+EXPORT_SYMBOL(swiotlb_unmap_sg);
/*
* Make physical memory consistent for a set of streaming mode DMA translations
@@ -919,11 +892,11 @@ swiotlb_sync_sg(struct device *hwdev, struct scatterlist *sgl,
BUG_ON(dir == DMA_NONE);
for_each_sg(sgl, sg, nelems, i) {
- if (sg->dma_address != swiotlb_sg_to_bus(sg))
+ if (sg->dma_address != swiotlb_virt_to_bus(hwdev, sg_virt(sg)))
sync_single(hwdev, swiotlb_bus_to_virt(sg->dma_address),
sg->dma_length, dir, target);
else if (dir == DMA_FROM_DEVICE)
- dma_mark_clean(swiotlb_bus_to_virt(sg->dma_address), sg->dma_length);
+ dma_mark_clean(sg_virt(sg), sg->dma_length);
}
}
@@ -933,6 +906,7 @@ swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
{
swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_CPU);
}
+EXPORT_SYMBOL(swiotlb_sync_sg_for_cpu);
void
swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
@@ -940,12 +914,14 @@ swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
{
swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_DEVICE);
}
+EXPORT_SYMBOL(swiotlb_sync_sg_for_device);
int
swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr)
{
- return (dma_addr == swiotlb_virt_to_bus(io_tlb_overflow_buffer));
+ return (dma_addr == swiotlb_virt_to_bus(hwdev, io_tlb_overflow_buffer));
}
+EXPORT_SYMBOL(swiotlb_dma_mapping_error);
/*
* Return whether the given device DMA address mask can be supported
@@ -956,20 +932,6 @@ swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr)
int
swiotlb_dma_supported(struct device *hwdev, u64 mask)
{
- return swiotlb_virt_to_bus(io_tlb_end - 1) <= mask;
+ return swiotlb_virt_to_bus(hwdev, io_tlb_end - 1) <= mask;
}
-
-EXPORT_SYMBOL(swiotlb_map_single);
-EXPORT_SYMBOL(swiotlb_unmap_single);
-EXPORT_SYMBOL(swiotlb_map_sg);
-EXPORT_SYMBOL(swiotlb_unmap_sg);
-EXPORT_SYMBOL(swiotlb_sync_single_for_cpu);
-EXPORT_SYMBOL(swiotlb_sync_single_for_device);
-EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_cpu);
-EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_device);
-EXPORT_SYMBOL(swiotlb_sync_sg_for_cpu);
-EXPORT_SYMBOL(swiotlb_sync_sg_for_device);
-EXPORT_SYMBOL(swiotlb_dma_mapping_error);
-EXPORT_SYMBOL(swiotlb_alloc_coherent);
-EXPORT_SYMBOL(swiotlb_free_coherent);
EXPORT_SYMBOL(swiotlb_dma_supported);
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 3b777025d87..0fbd0121d91 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -170,6 +170,8 @@ int strict_strtoul(const char *cp, unsigned int base, unsigned long *res)
return -EINVAL;
val = simple_strtoul(cp, &tail, base);
+ if (tail == cp)
+ return -EINVAL;
if ((*tail == '\0') ||
((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
*res = val;
@@ -241,6 +243,8 @@ int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res)
return -EINVAL;
val = simple_strtoull(cp, &tail, base);
+ if (tail == cp)
+ return -EINVAL;
if ((*tail == '\0') ||
((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
*res = val;
@@ -661,6 +665,9 @@ static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
*/
static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field_width, int precision, int flags)
{
+ if (!ptr)
+ return string(buf, end, "(null)", field_width, precision, flags);
+
switch (*fmt) {
case 'F':
ptr = dereference_function_descriptor(ptr);
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-22 12:49:27 +0000