diff options
Diffstat (limited to 'fs/nfs/write.c')
| -rw-r--r-- | fs/nfs/write.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 0fe9d7bf34db..089c242efac0 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -478,6 +478,23 @@ void nfs_join_page_group(struct nfs_page *head, struct nfs_commit_info *cinfo, nfs_destroy_unlinked_subrequests(destroy_list, head, inode); } +/** + * nfs_wait_on_request - Wait for a request to complete. + * @req: request to wait upon. + * + * Interruptible by fatal signals only. + * The user is responsible for holding a count on the request. + */ +static int nfs_wait_on_request(struct nfs_page *req) +{ + if (!test_bit(PG_BUSY, &req->wb_flags)) + return 0; + set_bit(PG_CONTENDED2, &req->wb_flags); + smp_mb__after_atomic(); + return wait_on_bit_io(&req->wb_flags, PG_BUSY, + TASK_UNINTERRUPTIBLE); +} + /* * nfs_unroll_locks - unlock all newly locked reqs and wait on @req * @head: head request of page group, must be holding head lock |