summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt2
-rw-r--r--arch/sparc/kernel/prom_common.c4
-rw-r--r--drivers/of/base.c100
-rw-r--r--include/linux/of.h2
4 files changed, 60 insertions, 48 deletions
diff --git a/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt
index 898b22294ba9..6d1c0988cfc7 100644
--- a/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt
+++ b/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt
@@ -4,7 +4,7 @@
The Synopsis designware mobile storage host controller is used to interface
a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
differences between the core Synopsis dw mshc controller properties described
-by synposis-dw-mshc.txt and the properties used by the Samsung Exynos specific
+by synopsis-dw-mshc.txt and the properties used by the Samsung Exynos specific
extensions to the Synopsis Designware Mobile Storage Host Controller.
Required Properties:
diff --git a/arch/sparc/kernel/prom_common.c b/arch/sparc/kernel/prom_common.c
index 1303021748c8..9f20566b0773 100644
--- a/arch/sparc/kernel/prom_common.c
+++ b/arch/sparc/kernel/prom_common.c
@@ -64,7 +64,7 @@ int of_set_property(struct device_node *dp, const char *name, void *val, int len
err = -ENODEV;
mutex_lock(&of_set_property_mutex);
- write_lock(&devtree_lock);
+ raw_spin_lock(&devtree_lock);
prevp = &dp->properties;
while (*prevp) {
struct property *prop = *prevp;
@@ -91,7 +91,7 @@ int of_set_property(struct device_node *dp, const char *name, void *val, int len
}
prevp = &(*prevp)->next;
}
- write_unlock(&devtree_lock);
+ raw_spin_unlock(&devtree_lock);
mutex_unlock(&of_set_property_mutex);
/* XXX Upate procfs if necessary... */
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 8b9fa83dc77b..e8d65aff8639 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -38,7 +38,7 @@ DEFINE_MUTEX(of_aliases_mutex);
/* use when traversing tree through the allnext, child, sibling,
* or parent members of struct device_node.
*/
-DEFINE_RWLOCK(devtree_lock);
+DEFINE_RAW_SPINLOCK(devtree_lock);
int of_n_addr_cells(struct device_node *np)
{
@@ -171,10 +171,11 @@ struct property *of_find_property(const struct device_node *np,
int *lenp)
{
struct property *pp;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
pp = __of_find_property(np, name, lenp);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return pp;
}
@@ -192,13 +193,13 @@ struct device_node *of_find_all_nodes(struct device_node *prev)
{
struct device_node *np;
- read_lock(&devtree_lock);
+ raw_spin_lock(&devtree_lock);
np = prev ? prev->allnext : of_allnodes;
for (; np != NULL; np = np->allnext)
if (of_node_get(np))
break;
of_node_put(prev);
- read_unlock(&devtree_lock);
+ raw_spin_unlock(&devtree_lock);
return np;
}
EXPORT_SYMBOL(of_find_all_nodes);
@@ -257,11 +258,12 @@ static int __of_device_is_compatible(const struct device_node *device,
int of_device_is_compatible(const struct device_node *device,
const char *compat)
{
+ unsigned long flags;
int res;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
res = __of_device_is_compatible(device, compat);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return res;
}
EXPORT_SYMBOL(of_device_is_compatible);
@@ -323,13 +325,14 @@ EXPORT_SYMBOL(of_device_is_available);
struct device_node *of_get_parent(const struct device_node *node)
{
struct device_node *np;
+ unsigned long flags;
if (!node)
return NULL;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np = of_node_get(node->parent);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_get_parent);
@@ -348,14 +351,15 @@ EXPORT_SYMBOL(of_get_parent);
struct device_node *of_get_next_parent(struct device_node *node)
{
struct device_node *parent;
+ unsigned long flags;
if (!node)
return NULL;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
parent = of_node_get(node->parent);
of_node_put(node);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return parent;
}
@@ -371,14 +375,15 @@ struct device_node *of_get_next_child(const struct device_node *node,
struct device_node *prev)
{
struct device_node *next;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
next = prev ? prev->sibling : node->child;
for (; next; next = next->sibling)
if (of_node_get(next))
break;
of_node_put(prev);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return next;
}
EXPORT_SYMBOL(of_get_next_child);
@@ -396,7 +401,7 @@ struct device_node *of_get_next_available_child(const struct device_node *node,
{
struct device_node *next;
- read_lock(&devtree_lock);
+ raw_spin_lock(&devtree_lock);
next = prev ? prev->sibling : node->child;
for (; next; next = next->sibling) {
if (!of_device_is_available(next))
@@ -405,7 +410,7 @@ struct device_node *of_get_next_available_child(const struct device_node *node,
break;
}
of_node_put(prev);
- read_unlock(&devtree_lock);
+ raw_spin_unlock(&devtree_lock);
return next;
}
EXPORT_SYMBOL(of_get_next_available_child);
@@ -443,14 +448,15 @@ EXPORT_SYMBOL(of_get_child_by_name);
struct device_node *of_find_node_by_path(const char *path)
{
struct device_node *np = of_allnodes;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
for (; np; np = np->allnext) {
if (np->full_name && (of_node_cmp(np->full_name, path) == 0)
&& of_node_get(np))
break;
}
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_find_node_by_path);
@@ -470,15 +476,16 @@ struct device_node *of_find_node_by_name(struct device_node *from,
const char *name)
{
struct device_node *np;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np = from ? from->allnext : of_allnodes;
for (; np; np = np->allnext)
if (np->name && (of_node_cmp(np->name, name) == 0)
&& of_node_get(np))
break;
of_node_put(from);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_find_node_by_name);
@@ -499,15 +506,16 @@ struct device_node *of_find_node_by_type(struct device_node *from,
const char *type)
{
struct device_node *np;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np = from ? from->allnext : of_allnodes;
for (; np; np = np->allnext)
if (np->type && (of_node_cmp(np->type, type) == 0)
&& of_node_get(np))
break;
of_node_put(from);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_find_node_by_type);
@@ -530,8 +538,9 @@ struct device_node *of_find_compatible_node(struct device_node *from,
const char *type, const char *compatible)
{
struct device_node *np;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np = from ? from->allnext : of_allnodes;
for (; np; np = np->allnext) {
if (type
@@ -542,7 +551,7 @@ struct device_node *of_find_compatible_node(struct device_node *from,
break;
}
of_node_put(from);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_find_compatible_node);
@@ -564,8 +573,9 @@ struct device_node *of_find_node_with_property(struct device_node *from,
{
struct device_node *np;
struct property *pp;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np = from ? from->allnext : of_allnodes;
for (; np; np = np->allnext) {
for (pp = np->properties; pp; pp = pp->next) {
@@ -577,7 +587,7 @@ struct device_node *of_find_node_with_property(struct device_node *from,
}
out:
of_node_put(from);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_find_node_with_property);
@@ -618,10 +628,11 @@ const struct of_device_id *of_match_node(const struct of_device_id *matches,
const struct device_node *node)
{
const struct of_device_id *match;
+ unsigned long flags;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
match = __of_match_node(matches, node);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return match;
}
EXPORT_SYMBOL(of_match_node);
@@ -645,11 +656,12 @@ struct device_node *of_find_matching_node_and_match(struct device_node *from,
{
struct device_node *np;
const struct of_device_id *m;
+ unsigned long flags;
if (match)
*match = NULL;
- read_lock(&devtree_lock);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np = from ? from->allnext : of_allnodes;
for (; np; np = np->allnext) {
m = __of_match_node(matches, np);
@@ -660,7 +672,7 @@ struct device_node *of_find_matching_node_and_match(struct device_node *from,
}
}
of_node_put(from);
- read_unlock(&devtree_lock);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return np;
}
EXPORT_SYMBOL(of_find_matching_node_and_match);
@@ -703,12 +715,12 @@ struct device_node *of_find_node_by_phandle(phandle handle)
{
struct device_node *np;
- read_lock(&devtree_lock);
+ raw_spin_lock(&devtree_lock);
for (np = of_allnodes; np; np = np->allnext)
if (np->phandle == handle)
break;
of_node_get(np);
- read_unlock(&devtree_lock);
+ raw_spin_unlock(&devtree_lock);
return np;
}
EXPORT_SYMBOL(of_find_node_by_phandle);
@@ -1180,18 +1192,18 @@ int of_add_property(struct device_node *np, struct property *prop)
return rc;
prop->next = NULL;
- write_lock_irqsave(&devtree_lock, flags);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
next = &np->properties;
while (*next) {
if (strcmp(prop->name, (*next)->name) == 0) {
/* duplicate ! don't insert it */
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return -1;
}
next = &(*next)->next;
}
*next = prop;
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
#ifdef CONFIG_PROC_DEVICETREE
/* try to add to proc as well if it was initialized */
@@ -1221,7 +1233,7 @@ int of_remove_property(struct device_node *np, struct property *prop)
if (rc)
return rc;
- write_lock_irqsave(&devtree_lock, flags);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
next = &np->properties;
while (*next) {
if (*next == prop) {
@@ -1234,7 +1246,7 @@ int of_remove_property(struct device_node *np, struct property *prop)
}
next = &(*next)->next;
}
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
if (!found)
return -ENODEV;
@@ -1274,7 +1286,7 @@ int of_update_property(struct device_node *np, struct property *newprop)
if (!oldprop)
return of_add_property(np, newprop);
- write_lock_irqsave(&devtree_lock, flags);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
next = &np->properties;
while (*next) {
if (*next == oldprop) {
@@ -1288,7 +1300,7 @@ int of_update_property(struct device_node *np, struct property *newprop)
}
next = &(*next)->next;
}
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
if (!found)
return -ENODEV;
@@ -1361,12 +1373,12 @@ int of_attach_node(struct device_node *np)
if (rc)
return rc;
- write_lock_irqsave(&devtree_lock, flags);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
np->sibling = np->parent->child;
np->allnext = of_allnodes;
np->parent->child = np;
of_allnodes = np;
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
of_add_proc_dt_entry(np);
return 0;
@@ -1409,17 +1421,17 @@ int of_detach_node(struct device_node *np)
if (rc)
return rc;
- write_lock_irqsave(&devtree_lock, flags);
+ raw_spin_lock_irqsave(&devtree_lock, flags);
if (of_node_check_flag(np, OF_DETACHED)) {
/* someone already detached it */
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return rc;
}
parent = np->parent;
if (!parent) {
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
return rc;
}
@@ -1446,7 +1458,7 @@ int of_detach_node(struct device_node *np)
}
of_node_set_flag(np, OF_DETACHED);
- write_unlock_irqrestore(&devtree_lock, flags);
+ raw_spin_unlock_irqrestore(&devtree_lock, flags);
of_remove_proc_dt_entry(np);
return rc;
diff --git a/include/linux/of.h b/include/linux/of.h
index 1e0d0c1bfb5e..b9e1b911f0eb 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -92,7 +92,7 @@ static inline void of_node_put(struct device_node *node) { }
extern struct device_node *of_allnodes;
extern struct device_node *of_chosen;
extern struct device_node *of_aliases;
-extern rwlock_t devtree_lock;
+extern raw_spinlock_t devtree_lock;
static inline bool of_have_populated_dt(void)
{
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-05 03:04:16 +0300