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-rw-r--r--lib/Kconfig.debug65
-rw-r--r--lib/bug.c18
-rw-r--r--lib/decompress_bunzip2.c10
-rw-r--r--lib/dma-debug.c1
-rw-r--r--lib/dynamic_debug.c140
-rw-r--r--lib/inflate.c2
-rw-r--r--lib/kobject.c39
-rw-r--r--lib/kobject_uevent.c4
-rw-r--r--lib/list_sort.c2
-rw-r--r--lib/radix-tree.c70
-rw-r--r--lib/raid6/.gitignore4
-rw-r--r--lib/raid6/Makefile81
-rw-r--r--lib/raid6/algos.c (renamed from lib/raid6/raid6algos.c)4
-rw-r--r--lib/raid6/altivec.uc (renamed from lib/raid6/raid6altivec.uc)0
-rw-r--r--lib/raid6/int.uc (renamed from lib/raid6/raid6int.uc)0
-rw-r--r--lib/raid6/mmx.c (renamed from lib/raid6/raid6mmx.c)6
-rw-r--r--lib/raid6/raid6test/Makefile75
-rw-r--r--lib/raid6/recov.c (renamed from lib/raid6/raid6recov.c)2
-rw-r--r--lib/raid6/sse1.c (renamed from lib/raid6/raid6sse1.c)6
-rw-r--r--lib/raid6/sse2.c (renamed from lib/raid6/raid6sse2.c)4
-rw-r--r--lib/raid6/test/Makefile72
-rw-r--r--lib/raid6/test/test.c (renamed from lib/raid6/raid6test/test.c)0
-rw-r--r--lib/raid6/x86.h (renamed from lib/raid6/raid6x86.h)2
-rw-r--r--lib/scatterlist.c14
-rw-r--r--lib/swiotlb.c18
25 files changed, 398 insertions, 241 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 9e06b7f5ecf..69a32664c28 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -353,7 +353,7 @@ config SLUB_DEBUG_ON
config SLUB_STATS
default n
bool "Enable SLUB performance statistics"
- depends on SLUB && SLUB_DEBUG && SYSFS
+ depends on SLUB && SYSFS
help
SLUB statistics are useful to debug SLUBs allocation behavior in
order find ways to optimize the allocator. This should never be
@@ -461,6 +461,15 @@ config DEBUG_MUTEXES
This feature allows mutex semantics violations to be detected and
reported.
+config BKL
+ bool "Big Kernel Lock" if (SMP || PREEMPT)
+ default y
+ help
+ This is the traditional lock that is used in old code instead
+ of proper locking. All drivers that use the BKL should depend
+ on this symbol.
+ Say Y here unless you are working on removing the BKL.
+
config DEBUG_LOCK_ALLOC
bool "Lock debugging: detect incorrect freeing of live locks"
depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
@@ -482,6 +491,7 @@ config PROVE_LOCKING
select DEBUG_SPINLOCK
select DEBUG_MUTEXES
select DEBUG_LOCK_ALLOC
+ select TRACE_IRQFLAGS
default n
help
This feature enables the kernel to prove that all locking
@@ -539,6 +549,23 @@ config PROVE_RCU_REPEATEDLY
disabling, allowing multiple RCU-lockdep warnings to be printed
on a single reboot.
+ Say Y to allow multiple RCU-lockdep warnings per boot.
+
+ Say N if you are unsure.
+
+config SPARSE_RCU_POINTER
+ bool "RCU debugging: sparse-based checks for pointer usage"
+ default n
+ help
+ This feature enables the __rcu sparse annotation for
+ RCU-protected pointers. This annotation will cause sparse
+ to flag any non-RCU used of annotated pointers. This can be
+ helpful when debugging RCU usage. Please note that this feature
+ is not intended to enforce code cleanliness; it is instead merely
+ a debugging aid.
+
+ Say Y to make sparse flag questionable use of RCU-protected pointers
+
Say N if you are unsure.
config LOCKDEP
@@ -579,11 +606,10 @@ config DEBUG_LOCKDEP
of more runtime overhead.
config TRACE_IRQFLAGS
- depends on DEBUG_KERNEL
bool
- default y
- depends on TRACE_IRQFLAGS_SUPPORT
- depends on PROVE_LOCKING
+ help
+ Enables hooks to interrupt enabling and disabling for
+ either tracing or lock debugging.
config DEBUG_SPINLOCK_SLEEP
bool "Spinlock debugging: sleep-inside-spinlock checking"
@@ -832,6 +858,30 @@ config RCU_CPU_STALL_DETECTOR
Say Y if you are unsure.
+config RCU_CPU_STALL_TIMEOUT
+ int "RCU CPU stall timeout in seconds"
+ depends on RCU_CPU_STALL_DETECTOR
+ range 3 300
+ default 60
+ help
+ If a given RCU grace period extends more than the specified
+ number of seconds, a CPU stall warning is printed. If the
+ RCU grace period persists, additional CPU stall warnings are
+ printed at more widely spaced intervals.
+
+config RCU_CPU_STALL_DETECTOR_RUNNABLE
+ bool "RCU CPU stall checking starts automatically at boot"
+ depends on RCU_CPU_STALL_DETECTOR
+ default y
+ help
+ If set, start checking for RCU CPU stalls immediately on
+ boot. Otherwise, RCU CPU stall checking must be manually
+ enabled.
+
+ Say Y if you are unsure.
+
+ Say N if you wish to suppress RCU CPU stall checking during boot.
+
config RCU_CPU_STALL_VERBOSE
bool "Print additional per-task information for RCU_CPU_STALL_DETECTOR"
depends on RCU_CPU_STALL_DETECTOR && TREE_PREEMPT_RCU
@@ -994,13 +1044,16 @@ config FAULT_INJECTION_STACKTRACE_FILTER
config LATENCYTOP
bool "Latency measuring infrastructure"
+ depends on HAVE_LATENCYTOP_SUPPORT
+ depends on DEBUG_KERNEL
+ depends on STACKTRACE_SUPPORT
+ depends on PROC_FS
select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE
select KALLSYMS
select KALLSYMS_ALL
select STACKTRACE
select SCHEDSTATS
select SCHED_DEBUG
- depends on HAVE_LATENCYTOP_SUPPORT
help
Enable this option if you want to use the LatencyTOP tool
to find out which userspace is blocking on what kernel operations.
diff --git a/lib/bug.c b/lib/bug.c
index f13daf43521..19552096d16 100644
--- a/lib/bug.c
+++ b/lib/bug.c
@@ -72,8 +72,8 @@ static const struct bug_entry *module_find_bug(unsigned long bugaddr)
return NULL;
}
-int module_bug_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
- struct module *mod)
+void module_bug_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
+ struct module *mod)
{
char *secstrings;
unsigned int i;
@@ -97,8 +97,6 @@ int module_bug_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
* could potentially lead to deadlock and thus be counter-productive.
*/
list_add(&mod->bug_list, &module_bug_list);
-
- return 0;
}
void module_bug_cleanup(struct module *mod)
@@ -136,8 +134,6 @@ enum bug_trap_type report_bug(unsigned long bugaddr, struct pt_regs *regs)
bug = find_bug(bugaddr);
- printk(KERN_EMERG "------------[ cut here ]------------\n");
-
file = NULL;
line = 0;
warning = 0;
@@ -156,19 +152,25 @@ enum bug_trap_type report_bug(unsigned long bugaddr, struct pt_regs *regs)
if (warning) {
/* this is a WARN_ON rather than BUG/BUG_ON */
+ printk(KERN_WARNING "------------[ cut here ]------------\n");
+
if (file)
- printk(KERN_ERR "Badness at %s:%u\n",
+ printk(KERN_WARNING "WARNING: at %s:%u\n",
file, line);
else
- printk(KERN_ERR "Badness at %p "
+ printk(KERN_WARNING "WARNING: at %p "
"[verbose debug info unavailable]\n",
(void *)bugaddr);
+ print_modules();
show_regs(regs);
+ print_oops_end_marker();
add_taint(BUG_GET_TAINT(bug));
return BUG_TRAP_TYPE_WARN;
}
+ printk(KERN_EMERG "------------[ cut here ]------------\n");
+
if (file)
printk(KERN_CRIT "kernel BUG at %s:%u!\n",
file, line);
diff --git a/lib/decompress_bunzip2.c b/lib/decompress_bunzip2.c
index a4e971dee10..81c8bb1cc6a 100644
--- a/lib/decompress_bunzip2.c
+++ b/lib/decompress_bunzip2.c
@@ -107,6 +107,8 @@ struct bunzip_data {
unsigned char selectors[32768]; /* nSelectors = 15 bits */
struct group_data groups[MAX_GROUPS]; /* Huffman coding tables */
int io_error; /* non-zero if we have IO error */
+ int byteCount[256];
+ unsigned char symToByte[256], mtfSymbol[256];
};
@@ -158,14 +160,16 @@ static int INIT get_next_block(struct bunzip_data *bd)
int *base = NULL;
int *limit = NULL;
int dbufCount, nextSym, dbufSize, groupCount, selector,
- i, j, k, t, runPos, symCount, symTotal, nSelectors,
- byteCount[256];
- unsigned char uc, symToByte[256], mtfSymbol[256], *selectors;
+ i, j, k, t, runPos, symCount, symTotal, nSelectors, *byteCount;
+ unsigned char uc, *symToByte, *mtfSymbol, *selectors;
unsigned int *dbuf, origPtr;
dbuf = bd->dbuf;
dbufSize = bd->dbufSize;
selectors = bd->selectors;
+ byteCount = bd->byteCount;
+ symToByte = bd->symToByte;
+ mtfSymbol = bd->mtfSymbol;
/* Read in header signature and CRC, then validate signature.
(last block signature means CRC is for whole file, return now) */
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 01e64270e24..4bfb0471f10 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -590,6 +590,7 @@ out_unlock:
static const struct file_operations filter_fops = {
.read = filter_read,
.write = filter_write,
+ .llseek = default_llseek,
};
static int dma_debug_fs_init(void)
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 02afc253372..3094318bfea 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -26,19 +26,11 @@
#include <linux/dynamic_debug.h>
#include <linux/debugfs.h>
#include <linux/slab.h>
+#include <linux/jump_label.h>
extern struct _ddebug __start___verbose[];
extern struct _ddebug __stop___verbose[];
-/* dynamic_debug_enabled, and dynamic_debug_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_debug_enabled;
-EXPORT_SYMBOL_GPL(dynamic_debug_enabled);
-long long dynamic_debug_enabled2;
-EXPORT_SYMBOL_GPL(dynamic_debug_enabled2);
-
struct ddebug_table {
struct list_head link;
char *mod_name;
@@ -88,26 +80,6 @@ static char *ddebug_describe_flags(struct _ddebug *dp, char *buf,
}
/*
- * must be called with ddebug_lock held
- */
-
-static int disabled_hash(char hash, bool first_table)
-{
- struct ddebug_table *dt;
- char table_hash_value;
-
- list_for_each_entry(dt, &ddebug_tables, link) {
- if (first_table)
- table_hash_value = dt->ddebugs->primary_hash;
- else
- table_hash_value = dt->ddebugs->secondary_hash;
- if (dt->num_enabled && (hash == table_hash_value))
- return 0;
- }
- return 1;
-}
-
-/*
* Search the tables for _ddebug's which match the given
* `query' and apply the `flags' and `mask' to them. Tells
* the user which ddebug's were changed, or whether none
@@ -170,17 +142,9 @@ static void ddebug_change(const struct ddebug_query *query,
dt->num_enabled++;
dp->flags = newflags;
if (newflags) {
- dynamic_debug_enabled |=
- (1LL << dp->primary_hash);
- dynamic_debug_enabled2 |=
- (1LL << dp->secondary_hash);
+ jump_label_enable(&dp->enabled);
} else {
- if (disabled_hash(dp->primary_hash, true))
- dynamic_debug_enabled &=
- ~(1LL << dp->primary_hash);
- if (disabled_hash(dp->secondary_hash, false))
- dynamic_debug_enabled2 &=
- ~(1LL << dp->secondary_hash);
+ jump_label_disable(&dp->enabled);
}
if (verbose)
printk(KERN_INFO
@@ -429,6 +393,40 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
return 0;
}
+static int ddebug_exec_query(char *query_string)
+{
+ unsigned int flags = 0, mask = 0;
+ struct ddebug_query query;
+#define MAXWORDS 9
+ int nwords;
+ char *words[MAXWORDS];
+
+ nwords = ddebug_tokenize(query_string, words, MAXWORDS);
+ if (nwords <= 0)
+ return -EINVAL;
+ if (ddebug_parse_query(words, nwords-1, &query))
+ return -EINVAL;
+ if (ddebug_parse_flags(words[nwords-1], &flags, &mask))
+ return -EINVAL;
+
+ /* actually go and implement the change */
+ ddebug_change(&query, flags, mask);
+ return 0;
+}
+
+static __initdata char ddebug_setup_string[1024];
+static __init int ddebug_setup_query(char *str)
+{
+ if (strlen(str) >= 1024) {
+ pr_warning("ddebug boot param string too large\n");
+ return 0;
+ }
+ strcpy(ddebug_setup_string, str);
+ return 1;
+}
+
+__setup("ddebug_query=", ddebug_setup_query);
+
/*
* File_ops->write method for <debugfs>/dynamic_debug/conrol. Gathers the
* command text from userspace, parses and executes it.
@@ -436,12 +434,8 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
static ssize_t ddebug_proc_write(struct file *file, const char __user *ubuf,
size_t len, loff_t *offp)
{
- unsigned int flags = 0, mask = 0;
- struct ddebug_query query;
-#define MAXWORDS 9
- int nwords;
- char *words[MAXWORDS];
char tmpbuf[256];
+ int ret;
if (len == 0)
return 0;
@@ -455,16 +449,9 @@ static ssize_t ddebug_proc_write(struct file *file, const char __user *ubuf,
printk(KERN_INFO "%s: read %d bytes from userspace\n",
__func__, (int)len);
- nwords = ddebug_tokenize(tmpbuf, words, MAXWORDS);
- if (nwords <= 0)
- return -EINVAL;
- if (ddebug_parse_query(words, nwords-1, &query))
- return -EINVAL;
- if (ddebug_parse_flags(words[nwords-1], &flags, &mask))
- return -EINVAL;
-
- /* actually go and implement the change */
- ddebug_change(&query, flags, mask);
+ ret = ddebug_exec_query(tmpbuf);
+ if (ret)
+ return ret;
*offp += len;
return len;
@@ -725,13 +712,14 @@ static void ddebug_remove_all_tables(void)
mutex_unlock(&ddebug_lock);
}
-static int __init dynamic_debug_init(void)
+static __initdata int ddebug_init_success;
+
+static int __init dynamic_debug_init_debugfs(void)
{
struct dentry *dir, *file;
- struct _ddebug *iter, *iter_start;
- const char *modname = NULL;
- int ret = 0;
- int n = 0;
+
+ if (!ddebug_init_success)
+ return -ENODEV;
dir = debugfs_create_dir("dynamic_debug", NULL);
if (!dir)
@@ -742,6 +730,16 @@ static int __init dynamic_debug_init(void)
debugfs_remove(dir);
return -ENOMEM;
}
+ return 0;
+}
+
+static int __init dynamic_debug_init(void)
+{
+ struct _ddebug *iter, *iter_start;
+ const char *modname = NULL;
+ int ret = 0;
+ int n = 0;
+
if (__start___verbose != __stop___verbose) {
iter = __start___verbose;
modname = iter->modname;
@@ -759,12 +757,26 @@ static int __init dynamic_debug_init(void)
}
ret = ddebug_add_module(iter_start, n, modname);
}
+
+ /* ddebug_query boot param got passed -> set it up */
+ if (ddebug_setup_string[0] != '\0') {
+ ret = ddebug_exec_query(ddebug_setup_string);
+ if (ret)
+ pr_warning("Invalid ddebug boot param %s",
+ ddebug_setup_string);
+ else
+ pr_info("ddebug initialized with string %s",
+ ddebug_setup_string);
+ }
+
out_free:
- if (ret) {
+ if (ret)
ddebug_remove_all_tables();
- debugfs_remove(dir);
- debugfs_remove(file);
- }
+ else
+ ddebug_init_success = 1;
return 0;
}
-module_init(dynamic_debug_init);
+/* Allow early initialization for boot messages via boot param */
+arch_initcall(dynamic_debug_init);
+/* Debugfs setup must be done later */
+module_init(dynamic_debug_init_debugfs);
diff --git a/lib/inflate.c b/lib/inflate.c
index 677b738c220..013a7619348 100644
--- a/lib/inflate.c
+++ b/lib/inflate.c
@@ -103,7 +103,9 @@
the two sets of lengths.
*/
#include <linux/compiler.h>
+#ifdef NO_INFLATE_MALLOC
#include <linux/slab.h>
+#endif
#ifdef RCSID
static char rcsid[] = "#Id: inflate.c,v 0.14 1993/06/10 13:27:04 jloup Exp #";
diff --git a/lib/kobject.c b/lib/kobject.c
index f07c57252e8..82dc34c095c 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -746,17 +746,56 @@ void kset_unregister(struct kset *k)
*/
struct kobject *kset_find_obj(struct kset *kset, const char *name)
{
+ return kset_find_obj_hinted(kset, name, NULL);
+}
+
+/**
+ * kset_find_obj_hinted - search for object in kset given a predecessor hint.
+ * @kset: kset we're looking in.
+ * @name: object's name.
+ * @hint: hint to possible object's predecessor.
+ *
+ * Check the hint's next object and if it is a match return it directly,
+ * otherwise, fall back to the behavior of kset_find_obj(). Either way
+ * a reference for the returned object is held and the reference on the
+ * hinted object is released.
+ */
+struct kobject *kset_find_obj_hinted(struct kset *kset, const char *name,
+ struct kobject *hint)
+{
struct kobject *k;
struct kobject *ret = NULL;
spin_lock(&kset->list_lock);
+
+ if (!hint)
+ goto slow_search;
+
+ /* end of list detection */
+ if (hint->entry.next == kset->list.next)
+ goto slow_search;
+
+ k = container_of(hint->entry.next, struct kobject, entry);
+ if (!kobject_name(k) || strcmp(kobject_name(k), name))
+ goto slow_search;
+
+ ret = kobject_get(k);
+ goto unlock_exit;
+
+slow_search:
list_for_each_entry(k, &kset->list, entry) {
if (kobject_name(k) && !strcmp(kobject_name(k), name)) {
ret = kobject_get(k);
break;
}
}
+
+unlock_exit:
spin_unlock(&kset->list_lock);
+
+ if (hint)
+ kobject_put(hint);
+
return ret;
}
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index b93579504df..70af0a7f97c 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -123,7 +123,7 @@ static int kobj_usermode_filter(struct kobject *kobj)
* @kobj: struct kobject that the action is happening to
* @envp_ext: pointer to environmental data
*
- * Returns 0 if kobject_uevent() is completed with success or the
+ * Returns 0 if kobject_uevent_env() is completed with success or the
* corresponding error when it fails.
*/
int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
@@ -317,7 +317,7 @@ exit:
EXPORT_SYMBOL_GPL(kobject_uevent_env);
/**
- * kobject_uevent - notify userspace by ending an uevent
+ * kobject_uevent - notify userspace by sending an uevent
*
* @action: action that is happening
* @kobj: struct kobject that the action is happening to
diff --git a/lib/list_sort.c b/lib/list_sort.c
index 4b5cb794c38..a7616fa3162 100644
--- a/lib/list_sort.c
+++ b/lib/list_sort.c
@@ -70,7 +70,7 @@ static void merge_and_restore_back_links(void *priv,
* element comparison is needed, so the client's cmp()
* routine can invoke cond_resched() periodically.
*/
- (*cmp)(priv, tail, tail);
+ (*cmp)(priv, tail->next, tail->next);
tail->next->prev = tail;
tail = tail->next;
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index e907858498a..6f412ab4c24 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -49,7 +49,7 @@ struct radix_tree_node {
unsigned int height; /* Height from the bottom */
unsigned int count;
struct rcu_head rcu_head;
- void *slots[RADIX_TREE_MAP_SIZE];
+ void __rcu *slots[RADIX_TREE_MAP_SIZE];
unsigned long tags[RADIX_TREE_MAX_TAGS][RADIX_TREE_TAG_LONGS];
};
@@ -174,14 +174,16 @@ static void radix_tree_node_rcu_free(struct rcu_head *head)
{
struct radix_tree_node *node =
container_of(head, struct radix_tree_node, rcu_head);
+ int i;
/*
* must only free zeroed nodes into the slab. radix_tree_shrink
* can leave us with a non-NULL entry in the first slot, so clear
* that here to make sure.
*/
- tag_clear(node, 0, 0);
- tag_clear(node, 1, 0);
+ for (i = 0; i < RADIX_TREE_MAX_TAGS; i++)
+ tag_clear(node, i, 0);
+
node->slots[0] = NULL;
node->count = 0;
@@ -623,17 +625,30 @@ EXPORT_SYMBOL(radix_tree_tag_get);
* also settag. The function stops either after tagging nr_to_tag items or
* after reaching last_index.
*
+ * The tags must be set from the leaf level only and propagated back up the
+ * path to the root. We must do this so that we resolve the full path before
+ * setting any tags on intermediate nodes. If we set tags as we descend, then
+ * we can get to the leaf node and find that the index that has the iftag
+ * set is outside the range we are scanning. This reults in dangling tags and
+ * can lead to problems with later tag operations (e.g. livelocks on lookups).
+ *
* The function returns number of leaves where the tag was set and sets
* *first_indexp to the first unscanned index.
+ * WARNING! *first_indexp can wrap if last_index is ULONG_MAX. Caller must
+ * be prepared to handle that.
*/
unsigned long radix_tree_range_tag_if_tagged(struct radix_tree_root *root,
unsigned long *first_indexp, unsigned long last_index,
unsigned long nr_to_tag,
unsigned int iftag, unsigned int settag)
{
- unsigned int height = root->height, shift;
- unsigned long tagged = 0, index = *first_indexp;
- struct radix_tree_node *open_slots[height], *slot;
+ unsigned int height = root->height;
+ struct radix_tree_path path[height];
+ struct radix_tree_path *pathp = path;
+ struct radix_tree_node *slot;
+ unsigned int shift;
+ unsigned long tagged = 0;
+ unsigned long index = *first_indexp;
last_index = min(last_index, radix_tree_maxindex(height));
if (index > last_index)
@@ -653,6 +668,13 @@ unsigned long radix_tree_range_tag_if_tagged(struct radix_tree_root *root,
shift = (height - 1) * RADIX_TREE_MAP_SHIFT;
slot = radix_tree_indirect_to_ptr(root->rnode);
+ /*
+ * we fill the path from (root->height - 2) to 0, leaving the index at
+ * (root->height - 1) as a terminator. Zero the node in the terminator
+ * so that we can use this to end walk loops back up the path.
+ */
+ path[height - 1].node = NULL;
+
for (;;) {
int offset;
@@ -661,21 +683,35 @@ unsigned long radix_tree_range_tag_if_tagged(struct radix_tree_root *root,
goto next;
if (!tag_get(slot, iftag, offset))
goto next;
+ if (height > 1) {
+ /* Go down one level */
+ height--;
+ shift -= RADIX_TREE_MAP_SHIFT;
+ path[height - 1].node = slot;
+ path[height - 1].offset = offset;
+ slot = slot->slots[offset];
+ continue;
+ }
+
+ /* tag the leaf */
+ tagged++;
tag_set(slot, settag, offset);
- if (height == 1) {
- tagged++;
- goto next;
+
+ /* walk back up the path tagging interior nodes */
+ pathp = &path[0];
+ while (pathp->node) {
+ /* stop if we find a node with the tag already set */
+ if (tag_get(pathp->node, settag, pathp->offset))
+ break;
+ tag_set(pathp->node, settag, pathp->offset);
+ pathp++;
}
- /* Go down one level */
- height--;
- shift -= RADIX_TREE_MAP_SHIFT;
- open_slots[height] = slot;
- slot = slot->slots[offset];
- continue;
+
next:
/* Go to next item at level determined by 'shift' */
index = ((index >> shift) + 1) << shift;
- if (index > last_index)
+ /* Overflow can happen when last_index is ~0UL... */
+ if (index > last_index || !index)
break;
if (tagged >= nr_to_tag)
break;
@@ -685,7 +721,7 @@ next:
* last_index is guaranteed to be in the tree, what
* we do below cannot wander astray.
*/
- slot = open_slots[height];
+ slot = path[height - 1].node;
height++;
shift += RADIX_TREE_MAP_SHIFT;
}
diff --git a/lib/raid6/.gitignore b/lib/raid6/.gitignore
new file mode 100644
index 00000000000..162becacf97
--- /dev/null
+++ b/lib/raid6/.gitignore
@@ -0,0 +1,4 @@
+mktables
+altivec*.c
+int*.c
+tables.c
diff --git a/lib/raid6/Makefile b/lib/raid6/Makefile
index 19bf32da644..8a38102770f 100644
--- a/lib/raid6/Makefile
+++ b/lib/raid6/Makefile
@@ -1,11 +1,8 @@
obj-$(CONFIG_RAID6_PQ) += raid6_pq.o
-raid6_pq-y += raid6algos.o raid6recov.o raid6tables.o \
- raid6int1.o raid6int2.o raid6int4.o \
- raid6int8.o raid6int16.o raid6int32.o \
- raid6altivec1.o raid6altivec2.o raid6altivec4.o \
- raid6altivec8.o \
- raid6mmx.o raid6sse1.o raid6sse2.o
+raid6_pq-y += algos.o recov.o tables.o int1.o int2.o int4.o \
+ int8.o int16.o int32.o altivec1.o altivec2.o altivec4.o \
+ altivec8.o mmx.o sse1.o sse2.o
hostprogs-y += mktables
quiet_cmd_unroll = UNROLL $@
@@ -16,63 +13,63 @@ ifeq ($(CONFIG_ALTIVEC),y)
altivec_flags := -maltivec -mabi=altivec
endif
-targets += raid6int1.c
-$(obj)/raid6int1.c: UNROLL := 1
-$(obj)/raid6int1.c: $(src)/raid6int.uc $(src)/unroll.awk FORCE
+targets += int1.c
+$(obj)/int1.c: UNROLL := 1
+$(obj)/int1.c: $(src)/int.uc $(src)/unroll.awk FORCE
$(call if_changed,unroll)
-targets += raid6int2.c
-$(obj)/raid6int2.c: UNROLL := 2
-$(obj)/raid6int2.c: $(src)/raid6int.uc $(src)/unroll.awk FORCE
+targets += int2.c
+$(obj)/int2.c: UNROLL := 2
+$(obj)/int2.c: $(src)/int.uc $(src)/unroll.awk FORCE
$(call if_changed,unroll)
-targets += raid6int4.c
-$(obj)/raid6int4.c: UNROLL := 4
-$(obj)/raid6int4.c: $(src)/raid6int.uc $(src)/unroll.awk FORCE
+targets += int4.c
+$(obj)/int4.c: UNROLL := 4
+$(obj)/int4.c: $(src)/int.uc $(src)/unroll.awk FORCE
$(call if_changed,unroll)
-targets += raid6int8.c
-$(obj)/raid6int8.c: UNROLL := 8
-$(obj)/raid6int8.c: $(src)/raid6int.uc $(src)/unroll.awk FORCE
+targets += int8.c
+$(obj)/int8.c: UNROLL := 8
+$(obj)/int8.c: $(src)/int.uc $(src)/unroll.awk FORCE
$(call if_changed,unroll)
-targets += raid6int16.c
-$(obj)/raid6int16.c: UNROLL := 16
-$(obj)/raid6int16.c: $(src)/raid6int.uc $(src)/unroll.awk FORCE
+targets += int16.c
+$(obj)/int16.c: UNROLL := 16
+$(obj)/int16.c: $(src)/int.uc $(src)/unroll.awk FORCE
$(call if_changed,unroll)
-targets += raid6int32.c
-$(obj)/raid6int32.c: UNROLL := 32
-$(obj)/raid6int32.c: $(src)/raid6int.uc $(src)/unroll.awk FORCE
+targets += int32.c
+$(obj)/int32.c: UNROLL := 32
+$(obj)/int32.c: $(src)/int.uc $(src)/unroll.awk FORCE
$(call if_changed,unroll)
-CFLAGS_raid6altivec1.o += $(altivec_flags)
-targets += raid6altivec1.c
-$(obj)/raid6altivec1.c: UNROLL := 1
-$(obj)/raid6altivec1.c: $(src)/raid6altivec.uc $(src)/unroll.awk FORCE
+CFLAGS_altivec1.o += $(altivec_flags)
+targets += altivec1.c
+$(obj)/altivec1.c: UNROLL := 1
+$(obj)/altivec1.c: $(src)/altivec.uc $(src)/unroll.awk FORCE
$(call if_changed,unroll)
-CFLAGS_raid6altivec2.o += $(altivec_flags)
-targets += raid6altivec2.c
-$(obj)/raid6altivec2.c: UNROLL := 2
-$(obj)/raid6altivec2.c: $(src)/raid6altivec.uc $(src)/unroll.awk FORCE
+CFLAGS_altivec2.o += $(altivec_flags)
+targets += altivec2.c
+$(obj)/altivec2.c: UNROLL := 2
+$(obj)/altivec2.c: $(src)/altivec.uc $(src)/unroll.awk FORCE
$(call if_changed,unroll)
-CFLAGS_raid6altivec4.o += $(altivec_flags)
-targets += raid6altivec4.c
-$(obj)/raid6altivec4.c: UNROLL := 4
-$(obj)/raid6altivec4.c: $(src)/raid6altivec.uc $(src)/unroll.awk FORCE
+CFLAGS_altivec4.o += $(altivec_flags)
+targets += altivec4.c
+$(obj)/altivec4.c: UNROLL := 4
+$(obj)/altivec4.c: $(src)/altivec.uc $(src)/unroll.awk FORCE
$(call if_changed,unroll)
-CFLAGS_raid6altivec8.o += $(altivec_flags)
-targets += raid6altivec8.c
-$(obj)/raid6altivec8.c: UNROLL := 8
-$(obj)/raid6altivec8.c: $(src)/raid6altivec.uc $(src)/unroll.awk FORCE
+CFLAGS_altivec8.o += $(altivec_flags)
+targets += altivec8.c
+$(obj)/altivec8.c: UNROLL := 8
+$(obj)/altivec8.c: $(src)/altivec.uc $(src)/unroll.awk FORCE
$(call if_changed,unroll)
quiet_cmd_mktable = TABLE $@
cmd_mktable = $(obj)/mktables > $@ || ( rm -f $@ && exit 1 )
-targets += raid6tables.c
-$(obj)/raid6tables.c: $(obj)/mktables FORCE
+targets += tables.c
+$(obj)/tables.c: $(obj)/mktables FORCE
$(call if_changed,mktable)
diff --git a/lib/raid6/raid6algos.c b/lib/raid6/algos.c
index 1f8784bfd44..b595f560bee 100644
--- a/lib/raid6/raid6algos.c
+++ b/lib/raid6/algos.c
@@ -11,17 +11,17 @@
* ----------------------------------------------------------------------- */
/*
- * raid6algos.c
+ * raid6/algos.c
*
* Algorithm list and algorithm selection for RAID-6
*/
#include <linux/raid/pq.h>
-#include <linux/gfp.h>
#ifndef __KERNEL__
#include <sys/mman.h>
#include <stdio.h>
#else
+#include <linux/gfp.h>
#if !RAID6_USE_EMPTY_ZERO_PAGE
/* In .bss so it's zeroed */
const char raid6_empty_zero_page[PAGE_SIZE] __attribute__((aligned(256)));
diff --git a/lib/raid6/raid6altivec.uc b/lib/raid6/altivec.uc
index 2654d5c854b..2654d5c854b 100644
--- a/lib/raid6/raid6altivec.uc
+++ b/lib/raid6/altivec.uc
diff --git a/lib/raid6/raid6int.uc b/lib/raid6/int.uc
index d1e276a14fa..d1e276a14fa 100644
--- a/lib/raid6/raid6int.uc
+++ b/lib/raid6/int.uc
diff --git a/lib/raid6/raid6mmx.c b/lib/raid6/mmx.c
index e7f6c13132b..279347f2309 100644
--- a/lib/raid6/raid6mmx.c
+++ b/lib/raid6/mmx.c
@@ -11,7 +11,7 @@
* ----------------------------------------------------------------------- */
/*
- * raid6mmx.c
+ * raid6/mmx.c
*
* MMX implementation of RAID-6 syndrome functions
*/
@@ -19,9 +19,9 @@
#if defined(__i386__) && !defined(__arch_um__)
#include <linux/raid/pq.h>
-#include "raid6x86.h"
+#include "x86.h"
-/* Shared with raid6sse1.c */
+/* Shared with raid6/sse1.c */
const struct raid6_mmx_constants {
u64 x1d;
} raid6_mmx_constants = {
diff --git a/lib/raid6/raid6test/Makefile b/lib/raid6/raid6test/Makefile
deleted file mode 100644
index 2874cbef529..00000000000
--- a/lib/raid6/raid6test/Makefile
+++ /dev/null
@@ -1,75 +0,0 @@
-#
-# This is a simple Makefile to test some of the RAID-6 code
-# from userspace.
-#
-
-CC = gcc
-OPTFLAGS = -O2 # Adjust as desired
-CFLAGS = -I.. -I ../../../include -g $(OPTFLAGS)
-LD = ld
-AWK = awk
-AR = ar
-RANLIB = ranlib
-
-.c.o:
- $(CC) $(CFLAGS) -c -o $@ $<
-
-%.c: ../%.c
- cp -f $< $@
-
-%.uc: ../%.uc
- cp -f $< $@
-
-all: raid6.a raid6test
-
-raid6.a: raid6int1.o raid6int2.o raid6int4.o raid6int8.o raid6int16.o \
- raid6int32.o \
- raid6mmx.o raid6sse1.o raid6sse2.o \
- raid6altivec1.o raid6altivec2.o raid6altivec4.o raid6altivec8.o \
- raid6recov.o raid6algos.o \
- raid6tables.o
- rm -f $@
- $(AR) cq $@ $^
- $(RANLIB) $@
-
-raid6test: test.c raid6.a
- $(CC) $(CFLAGS) -o raid6test $^
-
-raid6altivec1.c: raid6altivec.uc ../unroll.awk
- $(AWK) ../unroll.awk -vN=1 < raid6altivec.uc > $@
-
-raid6altivec2.c: raid6altivec.uc ../unroll.awk
- $(AWK) ../unroll.awk -vN=2 < raid6altivec.uc > $@
-
-raid6altivec4.c: raid6altivec.uc ../unroll.awk
- $(AWK) ../unroll.awk -vN=4 < raid6altivec.uc > $@
-
-raid6altivec8.c: raid6altivec.uc ../unroll.awk
- $(AWK) ../unroll.awk -vN=8 < raid6altivec.uc > $@
-
-raid6int1.c: raid6int.uc ../unroll.awk
- $(AWK) ../unroll.awk -vN=1 < raid6int.uc > $@
-
-raid6int2.c: raid6int.uc ../unroll.awk
- $(AWK) ../unroll.awk -vN=2 < raid6int.uc > $@
-
-raid6int4.c: raid6int.uc ../unroll.awk
- $(AWK) ../unroll.awk -vN=4 < raid6int.uc > $@
-
-raid6int8.c: raid6int.uc ../unroll.awk
- $(AWK) ../unroll.awk -vN=8 < raid6int.uc > $@
-
-raid6int16.c: raid6int.uc ../unroll.awk
- $(AWK) ../unroll.awk -vN=16 < raid6int.uc > $@
-
-raid6int32.c: raid6int.uc ../unroll.awk
- $(AWK) ../unroll.awk -vN=32 < raid6int.uc > $@
-
-raid6tables.c: mktables
- ./mktables > raid6tables.c
-
-clean:
- rm -f *.o *.a mktables mktables.c raid6int.uc raid6*.c raid6test
-
-spotless: clean
- rm -f *~
diff --git a/lib/raid6/raid6recov.c b/lib/raid6/recov.c
index 2609f00e0d6..8590d19cf52 100644
--- a/lib/raid6/raid6recov.c
+++ b/lib/raid6/recov.c
@@ -11,7 +11,7 @@
* ----------------------------------------------------------------------- */
/*
- * raid6recov.c
+ * raid6/recov.c
*
* RAID-6 data recovery in dual failure mode. In single failure mode,
* use the RAID-5 algorithm (or, in the case of Q failure, just reconstruct
diff --git a/lib/raid6/raid6sse1.c b/lib/raid6/sse1.c
index b274dd5eab8..10dd91948c0 100644
--- a/lib/raid6/raid6sse1.c
+++ b/lib/raid6/sse1.c
@@ -11,7 +11,7 @@
* ----------------------------------------------------------------------- */
/*
- * raid6sse1.c
+ * raid6/sse1.c
*
* SSE-1/MMXEXT implementation of RAID-6 syndrome functions
*
@@ -24,9 +24,9 @@
#if defined(__i386__) && !defined(__arch_um__)
#include <linux/raid/pq.h>
-#include "raid6x86.h"
+#include "x86.h"
-/* Defined in raid6mmx.c */
+/* Defined in raid6/mmx.c */
extern const struct raid6_mmx_constants {
u64 x1d;
} raid6_mmx_constants;
diff --git a/lib/raid6/raid6sse2.c b/lib/raid6/sse2.c
index 6ed6c6c0389..bc2d57daa58 100644
--- a/lib/raid6/raid6sse2.c
+++ b/lib/raid6/sse2.c
@@ -11,7 +11,7 @@
* ----------------------------------------------------------------------- */
/*
- * raid6sse2.c
+ * raid6/sse2.c
*
* SSE-2 implementation of RAID-6 syndrome functions
*
@@ -20,7 +20,7 @@
#if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__)
#include <linux/raid/pq.h>
-#include "raid6x86.h"
+#include "x86.h"
static const struct raid6_sse_constants {
u64 x1d[2];
diff --git a/lib/raid6/test/Makefile b/lib/raid6/test/Makefile
new file mode 100644
index 00000000000..aa651697b6d
--- /dev/null
+++ b/lib/raid6/test/Makefile
@@ -0,0 +1,72 @@
+#
+# This is a simple Makefile to test some of the RAID-6 code
+# from userspace.
+#
+
+CC = gcc
+OPTFLAGS = -O2 # Adjust as desired
+CFLAGS = -I.. -I ../../../include -g $(OPTFLAGS)
+LD = ld
+AWK = awk -f
+AR = ar
+RANLIB = ranlib
+
+.c.o:
+ $(CC) $(CFLAGS) -c -o $@ $<
+
+%.c: ../%.c
+ cp -f $< $@
+
+%.uc: ../%.uc
+ cp -f $< $@
+
+all: raid6.a raid6test
+
+raid6.a: int1.o int2.o int4.o int8.o int16.o int32.o mmx.o sse1.o sse2.o \
+ altivec1.o altivec2.o altivec4.o altivec8.o recov.o algos.o \
+ tables.o
+ rm -f $@
+ $(AR) cq $@ $^
+ $(RANLIB) $@
+
+raid6test: test.c raid6.a
+ $(CC) $(CFLAGS) -o raid6test $^
+
+altivec1.c: altivec.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=1 < altivec.uc > $@
+
+altivec2.c: altivec.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=2 < altivec.uc > $@
+
+altivec4.c: altivec.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=4 < altivec.uc > $@
+
+altivec8.c: altivec.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=8 < altivec.uc > $@
+
+int1.c: int.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=1 < int.uc > $@
+
+int2.c: int.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=2 < int.uc > $@
+
+int4.c: int.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=4 < int.uc > $@
+
+int8.c: int.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=8 < int.uc > $@
+
+int16.c: int.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=16 < int.uc > $@
+
+int32.c: int.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=32 < int.uc > $@
+
+tables.c: mktables
+ ./mktables > tables.c
+
+clean:
+ rm -f *.o *.a mktables mktables.c *.uc int*.c altivec*.c tables.c raid6test
+
+spotless: clean
+ rm -f *~
diff --git a/lib/raid6/raid6test/test.c b/lib/raid6/test/test.c
index 7a930318b17..7a930318b17 100644
--- a/lib/raid6/raid6test/test.c
+++ b/lib/raid6/test/test.c
diff --git a/lib/raid6/raid6x86.h b/lib/raid6/x86.h
index 4c22c156855..cb2a8c91c88 100644
--- a/lib/raid6/raid6x86.h
+++ b/lib/raid6/x86.h
@@ -11,7 +11,7 @@
* ----------------------------------------------------------------------- */
/*
- * raid6x86.h
+ * raid6/x86.h
*
* Definitions common to x86 and x86-64 RAID-6 code only
*/
diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index a5ec42868f9..4ceb05d772a 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -248,8 +248,18 @@ int __sg_alloc_table(struct sg_table *table, unsigned int nents,
left -= sg_size;
sg = alloc_fn(alloc_size, gfp_mask);
- if (unlikely(!sg))
- return -ENOMEM;
+ if (unlikely(!sg)) {
+ /*
+ * Adjust entry count to reflect that the last
+ * entry of the previous table won't be used for
+ * linkage. Without this, sg_kfree() may get
+ * confused.
+ */
+ if (prv)
+ table->nents = ++table->orig_nents;
+
+ return -ENOMEM;
+ }
sg_init_table(sg, alloc_size);
table->nents = table->orig_nents += sg_size;
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 34e3082632d..7c06ee51a29 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -70,7 +70,7 @@ static unsigned long io_tlb_nslabs;
*/
static unsigned long io_tlb_overflow = 32*1024;
-void *io_tlb_overflow_buffer;
+static void *io_tlb_overflow_buffer;
/*
* This is a free list describing the number of free entries available from
@@ -147,16 +147,16 @@ void __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
* to find contiguous free memory regions of size up to IO_TLB_SEGSIZE
* between io_tlb_start and io_tlb_end.
*/
- io_tlb_list = alloc_bootmem(io_tlb_nslabs * sizeof(int));
+ io_tlb_list = alloc_bootmem_pages(PAGE_ALIGN(io_tlb_nslabs * sizeof(int)));
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(phys_addr_t));
+ io_tlb_orig_addr = alloc_bootmem_pages(PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)));
/*
* Get the overflow emergency buffer
*/
- io_tlb_overflow_buffer = alloc_bootmem_low(io_tlb_overflow);
+ io_tlb_overflow_buffer = alloc_bootmem_low_pages(PAGE_ALIGN(io_tlb_overflow));
if (!io_tlb_overflow_buffer)
panic("Cannot allocate SWIOTLB overflow buffer!\n");
if (verbose)
@@ -182,7 +182,7 @@ swiotlb_init_with_default_size(size_t default_size, int verbose)
/*
* Get IO TLB memory from the low pages
*/
- io_tlb_start = alloc_bootmem_low_pages(bytes);
+ io_tlb_start = alloc_bootmem_low_pages(PAGE_ALIGN(bytes));
if (!io_tlb_start)
panic("Cannot allocate SWIOTLB buffer");
@@ -308,13 +308,13 @@ void __init swiotlb_free(void)
get_order(io_tlb_nslabs << IO_TLB_SHIFT));
} else {
free_bootmem_late(__pa(io_tlb_overflow_buffer),
- io_tlb_overflow);
+ PAGE_ALIGN(io_tlb_overflow));
free_bootmem_late(__pa(io_tlb_orig_addr),
- io_tlb_nslabs * sizeof(phys_addr_t));
+ PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)));
free_bootmem_late(__pa(io_tlb_list),
- io_tlb_nslabs * sizeof(int));
+ PAGE_ALIGN(io_tlb_nslabs * sizeof(int)));
free_bootmem_late(__pa(io_tlb_start),
- io_tlb_nslabs << IO_TLB_SHIFT);
+ PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT));
}
}