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[PATCH] NFS: cleanup: shrink struct nfs_open_context 

Remove the wait queue, and replace the functions that depended on it
 with wait_on_bit().

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2005-06-22 17:16:21 +00:00
parent 96651ab341
commit 464a98bd70
3 changed files with 27 additions and 8 deletions
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1
fs/nfs/inode.c
View File

@ -848,7 +848,6 @@ struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rp
ctx->state = NULL; ctx->state = NULL;
ctx->lockowner = current->files; ctx->lockowner = current->files;
ctx->error = 0; ctx->error = 0;
init_waitqueue_head(&ctx->waitq);
} }
return ctx; return ctx;
} }

33
fs/nfs/pagelist.c
View File

@ -107,7 +107,7 @@ void nfs_unlock_request(struct nfs_page *req)
smp_mb__before_clear_bit(); smp_mb__before_clear_bit();
clear_bit(PG_BUSY, &req->wb_flags); clear_bit(PG_BUSY, &req->wb_flags);
smp_mb__after_clear_bit(); smp_mb__after_clear_bit();
wake_up_all(&req->wb_context->waitq); wake_up_bit(&req->wb_flags, PG_BUSY);
nfs_release_request(req); nfs_release_request(req);
} }
@ -180,6 +180,17 @@ nfs_list_add_request(struct nfs_page *req, struct list_head *head)
req->wb_list_head = head; req->wb_list_head = head;
} }
static int nfs_wait_bit_interruptible(void *word)
{
int ret = 0;
if (signal_pending(current))
ret = -ERESTARTSYS;
else
schedule();
return ret;
}
/** /**
* nfs_wait_on_request - Wait for a request to complete. * nfs_wait_on_request - Wait for a request to complete.
* @req: request to wait upon. * @req: request to wait upon.
@ -190,12 +201,22 @@ nfs_list_add_request(struct nfs_page *req, struct list_head *head)
int int
nfs_wait_on_request(struct nfs_page *req) nfs_wait_on_request(struct nfs_page *req)
{ {
struct inode *inode = req->wb_context->dentry->d_inode; struct rpc_clnt *clnt = NFS_CLIENT(req->wb_context->dentry->d_inode);
struct rpc_clnt *clnt = NFS_CLIENT(inode); sigset_t oldmask;
int ret = 0;
if (!NFS_WBACK_BUSY(req)) if (!test_bit(PG_BUSY, &req->wb_flags))
return 0; goto out;
return nfs_wait_event(clnt, req->wb_context->waitq, !NFS_WBACK_BUSY(req)); /*
* Note: the call to rpc_clnt_sigmask() suffices to ensure that we
* are not interrupted if intr flag is not set
*/
rpc_clnt_sigmask(clnt, &oldmask);
ret = out_of_line_wait_on_bit(&req->wb_flags, PG_BUSY,
nfs_wait_bit_interruptible, TASK_INTERRUPTIBLE);
rpc_clnt_sigunmask(clnt, &oldmask);
out:
return ret;
} }
/** /**

1
include/linux/nfs_fs.h
View File

@ -84,7 +84,6 @@ struct nfs_open_context {
int error; int error;
struct list_head list; struct list_head list;
wait_queue_head_t waitq;
}; };
/* /*