[CIFS] Level 1 QPathInfo needed for proper OS2 support

[pandora-kernel.git] / fs / bio.c

diff --git a/fs/bio.c b/fs/bio.c
index 0a8c59c..6a0b9ad 100644 (file)
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -30,7 +30,7 @@
 
 #define BIO_POOL_SIZE 256
 
-static kmem_cache_t *bio_slab;
+static kmem_cache_t *bio_slab __read_mostly;
 
 #define BIOVEC_NR_POOLS 6
 
@@ -39,7 +39,7 @@ static kmem_cache_t *bio_slab;
  * basically we just need to survive
  */
 #define BIO_SPLIT_ENTRIES 8    
-mempool_t *bio_split_pool;
+mempool_t *bio_split_pool __read_mostly;
 
 struct biovec_slab {
        int nr_vecs;
@@ -636,12 +636,10 @@ static struct bio *__bio_map_user_iov(request_queue_t *q,
                return ERR_PTR(-ENOMEM);
 
        ret = -ENOMEM;
-       pages = kmalloc(nr_pages * sizeof(struct page *), GFP_KERNEL);
+       pages = kcalloc(nr_pages, sizeof(struct page *), GFP_KERNEL);
        if (!pages)
                goto out;
 
-       memset(pages, 0, nr_pages * sizeof(struct page *));
-
        for (i = 0; i < iov_count; i++) {
                unsigned long uaddr = (unsigned long)iov[i].iov_base;
                unsigned long len = iov[i].iov_len;
@@ -656,9 +654,10 @@ static struct bio *__bio_map_user_iov(request_queue_t *q,
                                     write_to_vm, 0, &pages[cur_page], NULL);
                up_read(&current->mm->mmap_sem);
 
-               if (ret < local_nr_pages)
+               if (ret < local_nr_pages) {
+                       ret = -EFAULT;
                        goto out_unmap;
-
+               }
 
                offset = uaddr & ~PAGE_MASK;
                for (j = cur_page; j < page_limit; j++) {
@@ -1118,6 +1117,9 @@ struct bio_pair *bio_split(struct bio *bi, mempool_t *pool, int first_sectors)
        bp->bio1.bi_io_vec = &bp->bv1;
        bp->bio2.bi_io_vec = &bp->bv2;
 
+       bp->bio1.bi_max_vecs = 1;
+       bp->bio2.bi_max_vecs = 1;
+
        bp->bio1.bi_end_io = bio_pair_end_1;
        bp->bio2.bi_end_io = bio_pair_end_2;
 
@@ -1127,16 +1129,6 @@ struct bio_pair *bio_split(struct bio *bi, mempool_t *pool, int first_sectors)
        return bp;
 }
 
-static void *bio_pair_alloc(gfp_t gfp_flags, void *data)
-{
-       return kmalloc(sizeof(struct bio_pair), gfp_flags);
-}
-
-static void bio_pair_free(void *bp, void *data)
-{
-       kfree(bp);
-}
-
 
 /*
  * create memory pools for biovec's in a bio_set.
@@ -1153,8 +1145,7 @@ static int biovec_create_pools(struct bio_set *bs, int pool_entries, int scale)
                if (i >= scale)
                        pool_entries >>= 1;
 
-               *bvp = mempool_create(pool_entries, mempool_alloc_slab,
-                                       mempool_free_slab, bp->slab);
+               *bvp = mempool_create_slab_pool(pool_entries, bp->slab);
                if (!*bvp)
                        return -ENOMEM;
        }
@@ -1186,15 +1177,12 @@ void bioset_free(struct bio_set *bs)
 
 struct bio_set *bioset_create(int bio_pool_size, int bvec_pool_size, int scale)
 {
-       struct bio_set *bs = kmalloc(sizeof(*bs), GFP_KERNEL);
+       struct bio_set *bs = kzalloc(sizeof(*bs), GFP_KERNEL);
 
        if (!bs)
                return NULL;
 
-       memset(bs, 0, sizeof(*bs));
-       bs->bio_pool = mempool_create(bio_pool_size, mempool_alloc_slab,
-                       mempool_free_slab, bio_slab);
-
+       bs->bio_pool = mempool_create_slab_pool(bio_pool_size, bio_slab);
        if (!bs->bio_pool)
                goto bad;
 
@@ -1257,8 +1245,8 @@ static int __init init_bio(void)
        if (!fs_bio_set)
                panic("bio: can't allocate bios\n");
 
-       bio_split_pool = mempool_create(BIO_SPLIT_ENTRIES,
-                               bio_pair_alloc, bio_pair_free, NULL);
+       bio_split_pool = mempool_create_kmalloc_pool(BIO_SPLIT_ENTRIES,
+                                                    sizeof(struct bio_pair));
        if (!bio_split_pool)
                panic("bio: can't create split pool\n");