[ARM] 3428/1: ARM: OMAP: 3/8 Update pin multiplexing
[linux-3.10.git] / block / deadline-iosched.c
index 7929471..399fa1e 100644 (file)
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/block/deadline-iosched.c
- *
  *  Deadline i/o scheduler.
  *
  *  Copyright (C) 2002 Jens Axboe <axboe@suse.de>
 /*
  * See Documentation/block/deadline-iosched.txt
  */
-static int read_expire = HZ / 2;  /* max time before a read is submitted. */
-static int write_expire = 5 * HZ; /* ditto for writes, these limits are SOFT! */
-static int writes_starved = 2;    /* max times reads can starve a write */
-static int fifo_batch = 16;       /* # of sequential requests treated as one
+static const int read_expire = HZ / 2;  /* max time before a read is submitted. */
+static const int write_expire = 5 * HZ; /* ditto for writes, these limits are SOFT! */
+static const int writes_starved = 2;    /* max times reads can starve a write */
+static const int fifo_batch = 16;       /* # of sequential requests treated as one
                                     by the above parameters. For throughput. */
 
 static const int deadline_hash_shift = 5;
@@ -696,11 +694,6 @@ deadline_set_request(request_queue_t *q, struct request *rq, struct bio *bio,
 /*
  * sysfs parts below
  */
-struct deadline_fs_entry {
-       struct attribute attr;
-       ssize_t (*show)(struct deadline_data *, char *);
-       ssize_t (*store)(struct deadline_data *, const char *, size_t);
-};
 
 static ssize_t
 deadline_var_show(int var, char *page)
@@ -718,23 +711,25 @@ deadline_var_store(int *var, const char *page, size_t count)
 }
 
 #define SHOW_FUNCTION(__FUNC, __VAR, __CONV)                           \
-static ssize_t __FUNC(struct deadline_data *dd, char *page)            \
+static ssize_t __FUNC(elevator_t *e, char *page)                       \
 {                                                                      \
-       int __data = __VAR;                                     \
+       struct deadline_data *dd = e->elevator_data;                    \
+       int __data = __VAR;                                             \
        if (__CONV)                                                     \
                __data = jiffies_to_msecs(__data);                      \
        return deadline_var_show(__data, (page));                       \
 }
-SHOW_FUNCTION(deadline_readexpire_show, dd->fifo_expire[READ], 1);
-SHOW_FUNCTION(deadline_writeexpire_show, dd->fifo_expire[WRITE], 1);
-SHOW_FUNCTION(deadline_writesstarved_show, dd->writes_starved, 0);
-SHOW_FUNCTION(deadline_frontmerges_show, dd->front_merges, 0);
-SHOW_FUNCTION(deadline_fifobatch_show, dd->fifo_batch, 0);
+SHOW_FUNCTION(deadline_read_expire_show, dd->fifo_expire[READ], 1);
+SHOW_FUNCTION(deadline_write_expire_show, dd->fifo_expire[WRITE], 1);
+SHOW_FUNCTION(deadline_writes_starved_show, dd->writes_starved, 0);
+SHOW_FUNCTION(deadline_front_merges_show, dd->front_merges, 0);
+SHOW_FUNCTION(deadline_fifo_batch_show, dd->fifo_batch, 0);
 #undef SHOW_FUNCTION
 
 #define STORE_FUNCTION(__FUNC, __PTR, MIN, MAX, __CONV)                        \
-static ssize_t __FUNC(struct deadline_data *dd, const char *page, size_t count)        \
+static ssize_t __FUNC(elevator_t *e, const char *page, size_t count)   \
 {                                                                      \
+       struct deadline_data *dd = e->elevator_data;                    \
        int __data;                                                     \
        int ret = deadline_var_store(&__data, (page), count);           \
        if (__data < (MIN))                                             \
@@ -747,83 +742,24 @@ static ssize_t __FUNC(struct deadline_data *dd, const char *page, size_t count)
                *(__PTR) = __data;                                      \
        return ret;                                                     \
 }
-STORE_FUNCTION(deadline_readexpire_store, &dd->fifo_expire[READ], 0, INT_MAX, 1);
-STORE_FUNCTION(deadline_writeexpire_store, &dd->fifo_expire[WRITE], 0, INT_MAX, 1);
-STORE_FUNCTION(deadline_writesstarved_store, &dd->writes_starved, INT_MIN, INT_MAX, 0);
-STORE_FUNCTION(deadline_frontmerges_store, &dd->front_merges, 0, 1, 0);
-STORE_FUNCTION(deadline_fifobatch_store, &dd->fifo_batch, 0, INT_MAX, 0);
+STORE_FUNCTION(deadline_read_expire_store, &dd->fifo_expire[READ], 0, INT_MAX, 1);
+STORE_FUNCTION(deadline_write_expire_store, &dd->fifo_expire[WRITE], 0, INT_MAX, 1);
+STORE_FUNCTION(deadline_writes_starved_store, &dd->writes_starved, INT_MIN, INT_MAX, 0);
+STORE_FUNCTION(deadline_front_merges_store, &dd->front_merges, 0, 1, 0);
+STORE_FUNCTION(deadline_fifo_batch_store, &dd->fifo_batch, 0, INT_MAX, 0);
 #undef STORE_FUNCTION
 
-static struct deadline_fs_entry deadline_readexpire_entry = {
-       .attr = {.name = "read_expire", .mode = S_IRUGO | S_IWUSR },
-       .show = deadline_readexpire_show,
-       .store = deadline_readexpire_store,
-};
-static struct deadline_fs_entry deadline_writeexpire_entry = {
-       .attr = {.name = "write_expire", .mode = S_IRUGO | S_IWUSR },
-       .show = deadline_writeexpire_show,
-       .store = deadline_writeexpire_store,
-};
-static struct deadline_fs_entry deadline_writesstarved_entry = {
-       .attr = {.name = "writes_starved", .mode = S_IRUGO | S_IWUSR },
-       .show = deadline_writesstarved_show,
-       .store = deadline_writesstarved_store,
-};
-static struct deadline_fs_entry deadline_frontmerges_entry = {
-       .attr = {.name = "front_merges", .mode = S_IRUGO | S_IWUSR },
-       .show = deadline_frontmerges_show,
-       .store = deadline_frontmerges_store,
-};
-static struct deadline_fs_entry deadline_fifobatch_entry = {
-       .attr = {.name = "fifo_batch", .mode = S_IRUGO | S_IWUSR },
-       .show = deadline_fifobatch_show,
-       .store = deadline_fifobatch_store,
-};
-
-static struct attribute *default_attrs[] = {
-       &deadline_readexpire_entry.attr,
-       &deadline_writeexpire_entry.attr,
-       &deadline_writesstarved_entry.attr,
-       &deadline_frontmerges_entry.attr,
-       &deadline_fifobatch_entry.attr,
-       NULL,
-};
-
-#define to_deadline(atr) container_of((atr), struct deadline_fs_entry, attr)
-
-static ssize_t
-deadline_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
-{
-       elevator_t *e = container_of(kobj, elevator_t, kobj);
-       struct deadline_fs_entry *entry = to_deadline(attr);
-
-       if (!entry->show)
-               return -EIO;
-
-       return entry->show(e->elevator_data, page);
-}
-
-static ssize_t
-deadline_attr_store(struct kobject *kobj, struct attribute *attr,
-                   const char *page, size_t length)
-{
-       elevator_t *e = container_of(kobj, elevator_t, kobj);
-       struct deadline_fs_entry *entry = to_deadline(attr);
-
-       if (!entry->store)
-               return -EIO;
-
-       return entry->store(e->elevator_data, page, length);
-}
-
-static struct sysfs_ops deadline_sysfs_ops = {
-       .show   = deadline_attr_show,
-       .store  = deadline_attr_store,
-};
-
-static struct kobj_type deadline_ktype = {
-       .sysfs_ops      = &deadline_sysfs_ops,
-       .default_attrs  = default_attrs,
+#define DD_ATTR(name) \
+       __ATTR(name, S_IRUGO|S_IWUSR, deadline_##name##_show, \
+                                     deadline_##name##_store)
+
+static struct elv_fs_entry deadline_attrs[] = {
+       DD_ATTR(read_expire),
+       DD_ATTR(write_expire),
+       DD_ATTR(writes_starved),
+       DD_ATTR(front_merges),
+       DD_ATTR(fifo_batch),
+       __ATTR_NULL
 };
 
 static struct elevator_type iosched_deadline = {
@@ -842,7 +778,7 @@ static struct elevator_type iosched_deadline = {
                .elevator_exit_fn =             deadline_exit_queue,
        },
 
-       .elevator_ktype = &deadline_ktype,
+       .elevator_attrs = deadline_attrs,
        .elevator_name = "deadline",
        .elevator_owner = THIS_MODULE,
 };