[PATCH 08/11] nfs: discard nfs_wait_bit_killable()

[NeilBrown <neilb@suse.de>]

This patch changes NFS to use wait_on_bit() instead of
wait_on_bit_action()
nfs_wait_bit_killable() is identical to bit_wait() except that it
returns -ERESTARTSYS instead of -EINTR.  NFS doesn't care about this
distinction.  The status will often get back to user-space but it will
only be sent when the process is being killed in which case there is no
user-space to care.

Signed-off-by: NeilBrown <neilb@suse.de>
---
 fs/nfs/file.c      |  5 ++---
 fs/nfs/inode.c     | 14 ++------------
 fs/nfs/internal.h  |  1 -
 fs/nfs/nfs4state.c |  5 ++---
 fs/nfs/pnfs.c      |  9 +++------
 5 files changed, 9 insertions(+), 25 deletions(-)

diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 1bb646752e46..0fafdfec5886 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -607,9 +607,8 @@ static vm_fault_t nfs_vm_page_mkwrite(struct vm_fault *vmf)
 		goto out;
 	}
 
-	wait_on_bit_action(&NFS_I(inode)->flags, NFS_INO_INVALIDATING,
-			   nfs_wait_bit_killable,
-			   TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
+	wait_on_bit(&NFS_I(inode)->flags, NFS_INO_INVALIDATING,
+		    TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
 
 	folio_lock(folio);
 	mapping = folio->mapping;
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 4c4c3ab57fcd..2f1b4f11a056 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -72,15 +72,6 @@ nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
 	return nfs_fileid_to_ino_t(fattr->fileid);
 }
 
-int nfs_wait_bit_killable(struct wait_bit_key *key, int mode)
-{
-	schedule();
-	if (signal_pending_state(mode, current))
-		return -ERESTARTSYS;
-	return 0;
-}
-EXPORT_SYMBOL_GPL(nfs_wait_bit_killable);
-
 /**
  * nfs_compat_user_ino64 - returns the user-visible inode number
  * @fileid: 64-bit fileid
@@ -1419,9 +1410,8 @@ int nfs_clear_invalid_mapping(struct address_space *mapping)
 	 * the bit lock here if it looks like we're going to be doing that.
 	 */
 	for (;;) {
-		ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING,
-					 nfs_wait_bit_killable,
-					 TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
+		ret = wait_on_bit(bitlock, NFS_INO_INVALIDATING,
+				  TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
 		if (ret)
 			goto out;
 		smp_rmb(); /* pairs with smp_wmb() below */
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index e564bd11ba60..1ec10fa50830 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -451,7 +451,6 @@ extern void nfs_evict_inode(struct inode *);
 extern void nfs_zap_acl_cache(struct inode *inode);
 extern void nfs_set_cache_invalid(struct inode *inode, unsigned long flags);
 extern bool nfs_check_cache_invalid(struct inode *, unsigned long);
-extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
 
 #if IS_ENABLED(CONFIG_NFS_LOCALIO)
 /* localio.c */
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 9a9f60a2291b..556b521f17eb 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1313,9 +1313,8 @@ int nfs4_wait_clnt_recover(struct nfs_client *clp)
 	might_sleep();
 
 	refcount_inc(&clp->cl_count);
-	res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
-				 nfs_wait_bit_killable,
-				 TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
+	res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
+			  TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
 	if (res)
 		goto out;
 	if (clp->cl_cons_state < 0)
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 445ba09ba324..400f409f45fa 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -2022,9 +2022,8 @@ static int pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo)
 	 * reference
 	 */
 	pnfs_layoutcommit_inode(lo->plh_inode, false);
-	return wait_on_bit_action(&lo->plh_flags, NFS_LAYOUT_RETURN,
-				   nfs_wait_bit_killable,
-				   TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
+	return wait_on_bit(&lo->plh_flags, NFS_LAYOUT_RETURN,
+			   TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
 }
 
 static void nfs_layoutget_begin(struct pnfs_layout_hdr *lo)
@@ -3319,9 +3318,8 @@ pnfs_layoutcommit_inode(struct inode *inode, bool sync)
 	if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) {
 		if (!sync)
 			goto out;
-		status = wait_on_bit_lock_action(&nfsi->flags,
+		status = wait_on_bit_lock(&nfsi->flags,
 				NFS_INO_LAYOUTCOMMITTING,
-				nfs_wait_bit_killable,
 				TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
 		if (status)
 			goto out;
@@ -3369,7 +3367,6 @@ pnfs_layoutcommit_inode(struct inode *inode, bool sync)
 		}
 	}
 
-
 	status = nfs4_proc_layoutcommit(data, sync);
 out:
 	if (status)
-- 
2.47.0