From: Dmitry Torokhov Date: Fri, 3 Feb 2017 01:41:25 +0000 (-0800) Subject: device property: allow to constify properties X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=bec84da8d1da6677c458e6eedd8e814eea91b9fc;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git device property: allow to constify properties There is no reason why statically defined properties should be modifiable, so let's make device_add_properties() and the rest of pset_*() functions to take const pointers to properties. This will allow us to mark properties as const/__initconst at definition sites. Signed-off-by: Dmitry Torokhov Reviewed-by: Andy Shevchenko Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/base/property.c b/drivers/base/property.c index 43a36d68c3fd..e9fa75645d69 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -21,7 +21,7 @@ struct property_set { struct fwnode_handle fwnode; - struct property_entry *properties; + const struct property_entry *properties; }; static inline bool is_pset_node(struct fwnode_handle *fwnode) @@ -35,10 +35,10 @@ static inline struct property_set *to_pset_node(struct fwnode_handle *fwnode) container_of(fwnode, struct property_set, fwnode) : NULL; } -static struct property_entry *pset_prop_get(struct property_set *pset, - const char *name) +static const struct property_entry *pset_prop_get(struct property_set *pset, + const char *name) { - struct property_entry *prop; + const struct property_entry *prop; if (!pset || !pset->properties) return NULL; @@ -50,11 +50,11 @@ static struct property_entry *pset_prop_get(struct property_set *pset, return NULL; } -static void *pset_prop_find(struct property_set *pset, const char *propname, - size_t length) +static const void *pset_prop_find(struct property_set *pset, + const char *propname, size_t length) { - struct property_entry *prop; - void *pointer; + const struct property_entry *prop; + const void *pointer; prop = pset_prop_get(pset, propname); if (!prop) @@ -74,7 +74,7 @@ static int pset_prop_read_u8_array(struct property_set *pset, const char *propname, u8 *values, size_t nval) { - void *pointer; + const void *pointer; size_t length = nval * sizeof(*values); pointer = pset_prop_find(pset, propname, length); @@ -89,7 +89,7 @@ static int pset_prop_read_u16_array(struct property_set *pset, const char *propname, u16 *values, size_t nval) { - void *pointer; + const void *pointer; size_t length = nval * sizeof(*values); pointer = pset_prop_find(pset, propname, length); @@ -104,7 +104,7 @@ static int pset_prop_read_u32_array(struct property_set *pset, const char *propname, u32 *values, size_t nval) { - void *pointer; + const void *pointer; size_t length = nval * sizeof(*values); pointer = pset_prop_find(pset, propname, length); @@ -119,7 +119,7 @@ static int pset_prop_read_u64_array(struct property_set *pset, const char *propname, u64 *values, size_t nval) { - void *pointer; + const void *pointer; size_t length = nval * sizeof(*values); pointer = pset_prop_find(pset, propname, length); @@ -133,7 +133,7 @@ static int pset_prop_read_u64_array(struct property_set *pset, static int pset_prop_count_elems_of_size(struct property_set *pset, const char *propname, size_t length) { - struct property_entry *prop; + const struct property_entry *prop; prop = pset_prop_get(pset, propname); if (!prop) @@ -146,7 +146,7 @@ static int pset_prop_read_string_array(struct property_set *pset, const char *propname, const char **strings, size_t nval) { - void *pointer; + const void *pointer; size_t length = nval * sizeof(*strings); pointer = pset_prop_find(pset, propname, length); @@ -160,8 +160,8 @@ static int pset_prop_read_string_array(struct property_set *pset, static int pset_prop_read_string(struct property_set *pset, const char *propname, const char **strings) { - struct property_entry *prop; - const char **pointer; + const struct property_entry *prop; + const char * const *pointer; prop = pset_prop_get(pset, propname); if (!prop) @@ -776,7 +776,7 @@ static int pset_copy_entry(struct property_entry *dst, */ static struct property_set *pset_copy_set(const struct property_set *pset) { - const struct property_entry *entry; + struct property_entry *props; struct property_set *p; size_t i, n = 0; @@ -787,14 +787,14 @@ static struct property_set *pset_copy_set(const struct property_set *pset) while (pset->properties[n].name) n++; - p->properties = kcalloc(n + 1, sizeof(*entry), GFP_KERNEL); + p->properties = props = kcalloc(n + 1, sizeof(*props), GFP_KERNEL); if (!p->properties) { kfree(p); return ERR_PTR(-ENOMEM); } for (i = 0; i < n; i++) { - int ret = pset_copy_entry(&p->properties[i], + int ret = pset_copy_entry(&props[i], &pset->properties[i]); if (ret) { pset_free_set(p); @@ -847,7 +847,8 @@ EXPORT_SYMBOL_GPL(device_remove_properties); * @dev as its secondary firmware node. The function takes a copy of * @properties. */ -int device_add_properties(struct device *dev, struct property_entry *properties) +int device_add_properties(struct device *dev, + const struct property_entry *properties) { struct property_set *p, pset; diff --git a/include/linux/property.h b/include/linux/property.h index 856e50b2140c..d37a4498b3ac 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -242,7 +242,7 @@ struct property_entry { } int device_add_properties(struct device *dev, - struct property_entry *properties); + const struct property_entry *properties); void device_remove_properties(struct device *dev); bool device_dma_supported(struct device *dev);