This is a note to let you know that I've just added the patch titled
NFSD: nfsd_file_put() can sleep
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfsd-nfsd_file_put-can-sleep.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ea1c48dda0bcbbda11fdf7983d0cf733eecdb2a5
Author: Chuck Lever <chuck.lever@xxxxxxxxxx>
Date: Wed May 11 13:02:21 2022 -0400
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@xxxxxxxxxx/T/#mf1855552570cf9a9c80d1e49d91438cd9085aada
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
index 0863bf5050935..27952e2f3aa14 100644
--- 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);
