[PATCH] elevator_t lifetime rules and sysfs fixes

1 files changed, 15 insertions, 54 deletions

diff --git a/block/as-iosched.c b/block/as-iosched.c
index 55a997fc4bb4..3fb60eb7093b 100644
--- a/block/as-iosched.c
+++ b/block/as-iosched.c
@@ -1709,11 +1709,6 @@ static int as_init_queue(request_queue_t *q, elevator_t *e)
 /*
  * sysfs parts below
  */
-struct as_fs_entry {
-        struct attribute attr;
-        ssize_t (*show)(struct as_data *, char *);
-        ssize_t (*store)(struct as_data *, const char *, size_t);
-};
 
 static ssize_t
 as_var_show(unsigned int var, char *page)
@@ -1730,8 +1725,9 @@ as_var_store(unsigned long *var, const char *page, size_t count)
         return count;
 }
 
-static ssize_t as_est_show(struct as_data *ad, char *page)
+static ssize_t as_est_show(elevator_t *e, char *page)
 {
+        struct as_data *ad = e->elevator_data;
         int pos = 0;
 
         pos += sprintf(page+pos, "%lu %% exit probability\n",
@@ -1747,8 +1743,9 @@ static ssize_t as_est_show(struct as_data *ad, char *page)
 }
 
 #define SHOW_FUNCTION(__FUNC, __VAR)                            \
-static ssize_t __FUNC(struct as_data *ad, char *page)           \
+static ssize_t __FUNC(elevator_t *e, char *page)                \
 {                                                               \
+        struct as_data *ad = e->elevator_data;                  \
         return as_var_show(jiffies_to_msecs((__VAR)), (page));  \
 }
 SHOW_FUNCTION(as_readexpire_show, ad->fifo_expire[REQ_SYNC]);
@@ -1759,9 +1756,10 @@ SHOW_FUNCTION(as_write_batchexpire_show, ad->batch_expire[REQ_ASYNC]);
 #undef SHOW_FUNCTION
 
 #define STORE_FUNCTION(__FUNC, __PTR, MIN, MAX)                         \
-static ssize_t __FUNC(struct as_data *ad, const char *page, size_t count)       \
+static ssize_t __FUNC(elevator_t *e, const char *page, size_t count)    \
 {                                                                       \
-        int ret = as_var_store(__PTR, (page), count);           \
+        struct as_data *ad = e->elevator_data;                          \
+        int ret = as_var_store(__PTR, (page), count);                   \
         if (*(__PTR) < (MIN))                                           \
                 *(__PTR) = (MIN);                                       \
         else if (*(__PTR) > (MAX))                                      \
@@ -1778,37 +1776,37 @@ STORE_FUNCTION(as_write_batchexpire_store,
                         &ad->batch_expire[REQ_ASYNC], 0, INT_MAX);
 #undef STORE_FUNCTION
 
-static struct as_fs_entry as_est_entry = {
+static struct elv_fs_entry as_est_entry = {
         .attr = {.name = "est_time", .mode = S_IRUGO },
         .show = as_est_show,
 };
-static struct as_fs_entry as_readexpire_entry = {
+static struct elv_fs_entry as_readexpire_entry = {
         .attr = {.name = "read_expire", .mode = S_IRUGO | S_IWUSR },
         .show = as_readexpire_show,
         .store = as_readexpire_store,
 };
-static struct as_fs_entry as_writeexpire_entry = {
+static struct elv_fs_entry as_writeexpire_entry = {
         .attr = {.name = "write_expire", .mode = S_IRUGO | S_IWUSR },
         .show = as_writeexpire_show,
         .store = as_writeexpire_store,
 };
-static struct as_fs_entry as_anticexpire_entry = {
+static struct elv_fs_entry as_anticexpire_entry = {
         .attr = {.name = "antic_expire", .mode = S_IRUGO | S_IWUSR },
         .show = as_anticexpire_show,
         .store = as_anticexpire_store,
 };
-static struct as_fs_entry as_read_batchexpire_entry = {
+static struct elv_fs_entry as_read_batchexpire_entry = {
         .attr = {.name = "read_batch_expire", .mode = S_IRUGO | S_IWUSR },
         .show = as_read_batchexpire_show,
         .store = as_read_batchexpire_store,
 };
-static struct as_fs_entry as_write_batchexpire_entry = {
+static struct elv_fs_entry as_write_batchexpire_entry = {
         .attr = {.name = "write_batch_expire", .mode = S_IRUGO | S_IWUSR },
         .show = as_write_batchexpire_show,
         .store = as_write_batchexpire_store,
 };
 
-static struct attribute *default_attrs[] = {
+static struct attribute *as_attrs[] = {
         &as_est_entry.attr,
         &as_readexpire_entry.attr,
         &as_writeexpire_entry.attr,
@@ -1818,43 +1816,6 @@ static struct attribute *default_attrs[] = {
         NULL,
 };
 
-#define to_as(atr) container_of((atr), struct as_fs_entry, attr)
-
-static ssize_t
-as_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
-{
-        elevator_t *e = container_of(kobj, elevator_t, kobj);
-        struct as_fs_entry *entry = to_as(attr);
-
-        if (!entry->show)
-                return -EIO;
-
-        return entry->show(e->elevator_data, page);
-}
-
-static ssize_t
-as_attr_store(struct kobject *kobj, struct attribute *attr,
-                    const char *page, size_t length)
-{
-        elevator_t *e = container_of(kobj, elevator_t, kobj);
-        struct as_fs_entry *entry = to_as(attr);
-
-        if (!entry->store)
-                return -EIO;
-
-        return entry->store(e->elevator_data, page, length);
-}
-
-static struct sysfs_ops as_sysfs_ops = {
-        .show   = as_attr_show,
-        .store  = as_attr_store,
-};
-
-static struct kobj_type as_ktype = {
-        .sysfs_ops      = &as_sysfs_ops,
-        .default_attrs  = default_attrs,
-};
-
 static struct elevator_type iosched_as = {
         .ops = {
                 .elevator_merge_fn =            as_merge,
@@ -1876,7 +1837,7 @@ static struct elevator_type iosched_as = {
                 .trim =                         as_trim,
         },
 
-        .elevator_ktype = &as_ktype,
+        .elevator_attrs = as_attrs,
         .elevator_name = "anticipatory",
         .elevator_owner = THIS_MODULE,
 };