Commit 93619e59 authored by Chuck Lever's avatar Chuck Lever Committed by Trond Myklebust
Browse files

NFS: create common routine for allocating nfs_direct_req



Factor out a small common piece of the path that allocate nfs_direct_req
structures.

Test plan:
Compile kernel with CONFIG_NFS and CONFIG_NFS_DIRECTIO enabled.
Signed-off-by: default avatarChuck Lever <cel@netapp.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent bc0fb201
......@@ -152,6 +152,24 @@ static void nfs_free_user_pages(struct page **pages, int npages, int do_dirty)
kfree(pages);
}
static inline struct nfs_direct_req *nfs_direct_req_alloc(void)
{
struct nfs_direct_req *dreq;
dreq = kmem_cache_alloc(nfs_direct_cachep, SLAB_KERNEL);
if (!dreq)
return NULL;
kref_init(&dreq->kref);
init_waitqueue_head(&dreq->wait);
INIT_LIST_HEAD(&dreq->list);
dreq->iocb = NULL;
atomic_set(&dreq->count, 0);
atomic_set(&dreq->error, 0);
return dreq;
}
static void nfs_direct_req_release(struct kref *kref)
{
struct nfs_direct_req *dreq = container_of(kref, struct nfs_direct_req, kref);
......@@ -194,17 +212,10 @@ static struct nfs_direct_req *nfs_direct_read_alloc(size_t nbytes, size_t rsize)
unsigned int reads = 0;
unsigned int rpages = (rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
dreq = kmem_cache_alloc(nfs_direct_cachep, SLAB_KERNEL);
dreq = nfs_direct_req_alloc();
if (!dreq)
return NULL;
kref_init(&dreq->kref);
init_waitqueue_head(&dreq->wait);
INIT_LIST_HEAD(&dreq->list);
dreq->iocb = NULL;
atomic_set(&dreq->count, 0);
atomic_set(&dreq->error, 0);
list = &dreq->list;
for(;;) {
struct nfs_read_data *data = nfs_readdata_alloc(rpages);
......
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