[PATCH RFC 2/2] NFSD: nfsd_file_put() can sleep

[Chuck Lever <chuck.lever@xxxxxxxxxx>]

Ensure the lockdep infrastructure can catch calls to nfsd_file_put()
when spinlocks are held.

Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
 fs/nfsd/filecache.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
index 8f7ed5dbb003..60a5d82e59b3 100644
--- a/fs/nfsd/filecache.c
+++ b/fs/nfsd/filecache.c
@@ -301,6 +301,8 @@ 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);