kheaders: Move from proc to sysfs

[thirdparty/kernel/stable.git] / kernel / kheaders.c

diff --git a/kernel/kheaders.c b/kernel/kheaders.c
index 70ae6052920de8f929c87cacec783ba2a9ea6055..8f69772af77b457b7fa5fa19723e8721445b5c6e 100644 (file)
--- a/kernel/kheaders.c
+++ b/kernel/kheaders.c
@@ -8,9 +8,8 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/proc_fs.h>
+#include <linux/kobject.h>
 #include <linux/init.h>
-#include <linux/uaccess.h>
 
 /*
  * Define kernel_headers_data and kernel_headers_data_end, within which the
@@ -31,39 +30,32 @@ extern char kernel_headers_data;
 extern char kernel_headers_data_end;
 
 static ssize_t
-ikheaders_read_current(struct file *file, char __user *buf,
-                     size_t len, loff_t *offset)
+ikheaders_read(struct file *file,  struct kobject *kobj,
+              struct bin_attribute *bin_attr,
+              char *buf, loff_t off, size_t len)
 {
-       return simple_read_from_buffer(buf, len, offset,
-                                      &kernel_headers_data,
-                                      &kernel_headers_data_end -
-                                      &kernel_headers_data);
+       memcpy(buf, &kernel_headers_data + off, len);
+       return len;
 }
 
-static const struct file_operations ikheaders_file_ops = {
-       .read = ikheaders_read_current,
-       .llseek = default_llseek,
+static struct bin_attribute kheaders_attr __ro_after_init = {
+       .attr = {
+               .name = "kheaders.tar.xz",
+               .mode = 0444,
+       },
+       .read = &ikheaders_read,
 };
 
 static int __init ikheaders_init(void)
 {
-       struct proc_dir_entry *entry;
-
-       /* create the current headers file */
-       entry = proc_create("kheaders.tar.xz", S_IRUGO, NULL,
-                           &ikheaders_file_ops);
-       if (!entry)
-               return -ENOMEM;
-
-       proc_set_size(entry,
-                     &kernel_headers_data_end -
-                     &kernel_headers_data);
-       return 0;
+       kheaders_attr.size = (&kernel_headers_data_end -
+                             &kernel_headers_data);
+       return sysfs_create_bin_file(kernel_kobj, &kheaders_attr);
 }
 
 static void __exit ikheaders_cleanup(void)
 {
-       remove_proc_entry("kheaders.tar.xz", NULL);
+       sysfs_remove_bin_file(kernel_kobj, &kheaders_attr);
 }
 
 module_init(ikheaders_init);