NFSD: nfsd_file_put() can sleep

[ Upstream commit 08af54b3e5729bc1d56ad3190af811301bdc37a1 ]

Now that there are no more callers of nfsd_file_put() that might
hold a spin lock, ensure the lockdep infrastructure can catch
newly introduced calls to nfsd_file_put() made while a spinlock
is held.

Link: https://lore.kernel.org/linux-nfs/ece7fd1d-5fb3-5155-54ba-347cfc19bd9a@oracle.com/T/#mf1855552570cf9a9c80d1e49d91438cd9085aada
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
index 0863bf50509351c07f76a20e58ba91a7c4ed2763..27952e2f3aa148749dd818878f2483ff1ed88c5f 100644 (file)
--- a/fs/nfsd/filecache.c
+++ b/fs/nfsd/filecache.c
@@ -296,6 +296,8 @@ nfsd_file_put_noref(struct nfsd_file *nf)
 void
 nfsd_file_put(struct nfsd_file *nf)
 {
+       might_sleep();
+
        set_bit(NFSD_FILE_REFERENCED, &nf->nf_flags);
        if (test_bit(NFSD_FILE_HASHED, &nf->nf_flags) == 0) {
                nfsd_file_flush(nf);