[PATCH 11/24] netfs: Use bh-disabling spinlocks for rreq->lock

[David Howells]

Use bh-disabling spinlocks when accessing rreq->lock because, in the
future, it may be twiddled from softirq context when cleanup is driven from
cache backend DIO completion.

Signed-off-by: David Howells <dhowe...@redhat.com>
cc: Jeff Layton <jlay...@kernel.org>
cc: ne...@lists.linux.dev
cc: linux-fsde...@vger.kernel.org
---
 fs/netfs/write_collect.c | 4 ++--
 fs/netfs/write_issue.c   | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/netfs/write_collect.c b/fs/netfs/write_collect.c
index e105ac270090..5f504b03a1e7 100644
--- a/fs/netfs/write_collect.c
+++ b/fs/netfs/write_collect.c
@@ -466,7 +466,7 @@ static void netfs_collect_write_results(struct 
netfs_io_request *wreq)
 
                cancel:
                        /* Remove if completely consumed. */
-                       spin_lock(&wreq->lock);
+                       spin_lock_bh(&wreq->lock);
 
                        remove = front;
                        list_del_init(&front->rreq_link);
@@ -482,7 +482,7 @@ static void netfs_collect_write_results(struct 
netfs_io_request *wreq)
                                }
                        }
 
-                       spin_unlock(&wreq->lock);
+                       spin_unlock_bh(&wreq->lock);
                        netfs_put_subrequest(remove, false,
                                             notes & SAW_FAILURE ?
                                             netfs_sreq_trace_put_cancel :
diff --git a/fs/netfs/write_issue.c b/fs/netfs/write_issue.c
index 6e835670dc58..0354c992467b 100644
--- a/fs/netfs/write_issue.c
+++ b/fs/netfs/write_issue.c
@@ -189,7 +189,7 @@ static void netfs_prepare_write(struct netfs_io_request 
*wreq,
         * the list.  The collector only goes nextwards and uses the lock to
         * remove entries off of the front.
         */
-       spin_lock(&wreq->lock);
+       spin_lock_bh(&wreq->lock);
        list_add_tail(&subreq->rreq_link, &stream->subrequests);
        if (list_is_first(&subreq->rreq_link, &stream->subrequests)) {
                stream->front = subreq;
@@ -200,7 +200,7 @@ static void netfs_prepare_write(struct netfs_io_request 
*wreq,
                }
        }
 
-       spin_unlock(&wreq->lock);
+       spin_unlock_bh(&wreq->lock);
 
        stream->construct = subreq;
 }