[NetLabel]: rework the Netlink attribute handling (part 1)

[linux-2.6.git] / block / deadline-iosched.c

diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index c94de8e12fbf8aa5bf827bd982a10df0a930948b..c7ca9f0b64989cdda8a16a56593fd52f2a251470 100644 (file)
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -8,7 +8,6 @@
 #include <linux/blkdev.h>
 #include <linux/elevator.h>
 #include <linux/bio.h>
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/init.h>
@@ -30,8 +29,7 @@ static const int deadline_hash_shift = 5;
 #define DL_HASH_FN(sec)                (hash_long(DL_HASH_BLOCK((sec)), deadline_hash_shift))
 #define DL_HASH_ENTRIES                (1 << deadline_hash_shift)
 #define rq_hash_key(rq)                ((rq)->sector + (rq)->nr_sectors)
-#define list_entry_hash(ptr)   list_entry((ptr), struct deadline_rq, hash)
-#define ON_HASH(drq)           (drq)->on_hash
+#define ON_HASH(drq)           (!hlist_unhashed(&(drq)->hash))
 
 struct deadline_data {
        /*
@@ -48,7 +46,7 @@ struct deadline_data {
         * next in sort order. read, write or both are NULL
         */
        struct deadline_rq *next_drq[2];
-       struct list_head *hash;         /* request hash */
+       struct hlist_head *hash;        /* request hash */
        unsigned int batching;          /* number of sequential requests made */
        sector_t last_sector;           /* head position */
        unsigned int starved;           /* times reads have starved writes */
@@ -79,8 +77,7 @@ struct deadline_rq {
        /*
         * request hash, key is the ending offset (for back merge lookup)
         */
-       struct list_head hash;
-       char on_hash;
+       struct hlist_node hash;
 
        /*
         * expire fifo
@@ -100,8 +97,7 @@ static kmem_cache_t *drq_pool;
  */
 static inline void __deadline_del_drq_hash(struct deadline_rq *drq)
 {
-       drq->on_hash = 0;
-       list_del_init(&drq->hash);
+       hlist_del_init(&drq->hash);
 }
 
 static inline void deadline_del_drq_hash(struct deadline_rq *drq)
@@ -117,8 +113,7 @@ deadline_add_drq_hash(struct deadline_data *dd, struct deadline_rq *drq)
 
        BUG_ON(ON_HASH(drq));
 
-       drq->on_hash = 1;
-       list_add(&drq->hash, &dd->hash[DL_HASH_FN(rq_hash_key(rq))]);
+       hlist_add_head(&drq->hash, &dd->hash[DL_HASH_FN(rq_hash_key(rq))]);
 }
 
 /*
@@ -128,26 +123,24 @@ static inline void
 deadline_hot_drq_hash(struct deadline_data *dd, struct deadline_rq *drq)
 {
        struct request *rq = drq->request;
-       struct list_head *head = &dd->hash[DL_HASH_FN(rq_hash_key(rq))];
+       struct hlist_head *head = &dd->hash[DL_HASH_FN(rq_hash_key(rq))];
 
-       if (ON_HASH(drq) && drq->hash.prev != head) {
-               list_del(&drq->hash);
-               list_add(&drq->hash, head);
+       if (ON_HASH(drq) && &drq->hash != head->first) {
+               hlist_del(&drq->hash);
+               hlist_add_head(&drq->hash, head);
        }
 }
 
 static struct request *
 deadline_find_drq_hash(struct deadline_data *dd, sector_t offset)
 {
-       struct list_head *hash_list = &dd->hash[DL_HASH_FN(offset)];
-       struct list_head *entry, *next = hash_list->next;
+       struct hlist_head *hash_list = &dd->hash[DL_HASH_FN(offset)];
+       struct hlist_node *entry, *next;
+       struct deadline_rq *drq;
 
-       while ((entry = next) != hash_list) {
-               struct deadline_rq *drq = list_entry_hash(entry);
+       hlist_for_each_entry_safe(drq, entry, next, hash_list, hash) {
                struct request *__rq = drq->request;
 
-               next = entry->next;
-               
                BUG_ON(!ON_HASH(drq));
 
                if (!rq_mergeable(__rq)) {
@@ -165,9 +158,6 @@ deadline_find_drq_hash(struct deadline_data *dd, sector_t offset)
 /*
  * rb tree support functions
  */
-#define RB_EMPTY(root) ((root)->rb_node == NULL)
-#define ON_RB(node)    (rb_parent(node) != node)
-#define RB_CLEAR(node) (rb_set_parent(node, node))
 #define rb_entry_drq(node)     rb_entry((node), struct deadline_rq, rb_node)
 #define DRQ_RB_ROOT(dd, drq)   (&(dd)->sort_list[rq_data_dir((drq)->request)])
 #define rq_rb_key(rq)          (rq)->sector
@@ -226,9 +216,9 @@ deadline_del_drq_rb(struct deadline_data *dd, struct deadline_rq *drq)
                        dd->next_drq[data_dir] = rb_entry_drq(rbnext);
        }
 
-       BUG_ON(!ON_RB(&drq->rb_node));
+       BUG_ON(!RB_EMPTY_NODE(&drq->rb_node));
        rb_erase(&drq->rb_node, DRQ_RB_ROOT(dd, drq));
-       RB_CLEAR(&drq->rb_node);
+       RB_CLEAR_NODE(&drq->rb_node);
 }
 
 static struct request *
@@ -502,7 +492,7 @@ static int deadline_dispatch_requests(request_queue_t *q, int force)
         */
 
        if (reads) {
-               BUG_ON(RB_EMPTY(&dd->sort_list[READ]));
+               BUG_ON(RB_EMPTY_ROOT(&dd->sort_list[READ]));
 
                if (writes && (dd->starved++ >= dd->writes_starved))
                        goto dispatch_writes;
@@ -518,7 +508,7 @@ static int deadline_dispatch_requests(request_queue_t *q, int force)
 
        if (writes) {
 dispatch_writes:
-               BUG_ON(RB_EMPTY(&dd->sort_list[WRITE]));
+               BUG_ON(RB_EMPTY_ROOT(&dd->sort_list[WRITE]));
 
                dd->starved = 0;
 
@@ -625,7 +615,7 @@ static void *deadline_init_queue(request_queue_t *q, elevator_t *e)
                return NULL;
        memset(dd, 0, sizeof(*dd));
 
-       dd->hash = kmalloc_node(sizeof(struct list_head)*DL_HASH_ENTRIES,
+       dd->hash = kmalloc_node(sizeof(struct hlist_head)*DL_HASH_ENTRIES,
                                GFP_KERNEL, q->node);
        if (!dd->hash) {
                kfree(dd);
@@ -641,7 +631,7 @@ static void *deadline_init_queue(request_queue_t *q, elevator_t *e)
        }
 
        for (i = 0; i < DL_HASH_ENTRIES; i++)
-               INIT_LIST_HEAD(&dd->hash[i]);
+               INIT_HLIST_HEAD(&dd->hash[i]);
 
        INIT_LIST_HEAD(&dd->fifo_list[READ]);
        INIT_LIST_HEAD(&dd->fifo_list[WRITE]);
@@ -674,11 +664,10 @@ deadline_set_request(request_queue_t *q, struct request *rq, struct bio *bio,
        drq = mempool_alloc(dd->drq_pool, gfp_mask);
        if (drq) {
                memset(drq, 0, sizeof(*drq));
-               RB_CLEAR(&drq->rb_node);
+               RB_CLEAR_NODE(&drq->rb_node);
                drq->request = rq;
 
-               INIT_LIST_HEAD(&drq->hash);
-               drq->on_hash = 0;
+               INIT_HLIST_NODE(&drq->hash);
 
                INIT_LIST_HEAD(&drq->fifo);