Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

[linux-drm-fsl-dcu.git] / kernel / resource.c

diff --git a/kernel/resource.c b/kernel/resource.c
index 6de60c12143e63f539701c3bc1687f3f21d0df9d..2a3f886365808241e329222772d28dfadf87da62 100644 (file)
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -17,6 +17,7 @@
 #include <linux/fs.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/device.h>
 #include <asm/io.h>
 
 
@@ -88,7 +89,7 @@ static int r_show(struct seq_file *m, void *v)
        return 0;
 }
 
-static struct seq_operations resource_op = {
+static const struct seq_operations resource_op = {
        .start  = r_start,
        .next   = r_next,
        .stop   = r_stop,
@@ -115,14 +116,14 @@ static int iomem_open(struct inode *inode, struct file *file)
        return res;
 }
 
-static struct file_operations proc_ioports_operations = {
+static const struct file_operations proc_ioports_operations = {
        .open           = ioports_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
        .release        = seq_release,
 };
 
-static struct file_operations proc_iomem_operations = {
+static const struct file_operations proc_iomem_operations = {
        .open           = iomem_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
@@ -617,6 +618,67 @@ void __release_region(struct resource *parent, resource_size_t start,
 }
 EXPORT_SYMBOL(__release_region);
 
+/*
+ * Managed region resource
+ */
+struct region_devres {
+       struct resource *parent;
+       resource_size_t start;
+       resource_size_t n;
+};
+
+static void devm_region_release(struct device *dev, void *res)
+{
+       struct region_devres *this = res;
+
+       __release_region(this->parent, this->start, this->n);
+}
+
+static int devm_region_match(struct device *dev, void *res, void *match_data)
+{
+       struct region_devres *this = res, *match = match_data;
+
+       return this->parent == match->parent &&
+               this->start == match->start && this->n == match->n;
+}
+
+struct resource * __devm_request_region(struct device *dev,
+                               struct resource *parent, resource_size_t start,
+                               resource_size_t n, const char *name)
+{
+       struct region_devres *dr = NULL;
+       struct resource *res;
+
+       dr = devres_alloc(devm_region_release, sizeof(struct region_devres),
+                         GFP_KERNEL);
+       if (!dr)
+               return NULL;
+
+       dr->parent = parent;
+       dr->start = start;
+       dr->n = n;
+
+       res = __request_region(parent, start, n, name);
+       if (res)
+               devres_add(dev, dr);
+       else
+               devres_free(dr);
+
+       return res;
+}
+EXPORT_SYMBOL(__devm_request_region);
+
+void __devm_release_region(struct device *dev, struct resource *parent,
+                          resource_size_t start, resource_size_t n)
+{
+       struct region_devres match_data = { parent, start, n };
+
+       __release_region(parent, start, n);
+       WARN_ON(devres_destroy(dev, devm_region_release, devm_region_match,
+                              &match_data));
+}
+EXPORT_SYMBOL(__devm_release_region);
+
 /*
  * Called from init/main.c to reserve IO ports.
  */