linux-kernel - [PATCH] fs: nfs: Adding new return type vm_fault

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Message-ID: <20180702152709.GA3837@jordon-HP-15-Notebook-PC>
Date:   Mon, 2 Jul 2018 20:57:09 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     akpm@...ux-foundation.org
Cc:     trond.myklebust@...merspace.com, anna.schumaker@...app.com,
        linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        willy@...radead.org
Subject: [PATCH] fs: nfs: Adding new return type vm_fault_t

Use new return type vm_fault_t for fault handler
in struct vm_operations_struct. For now, this is
just documenting that the function returns a 
VM_FAULT value rather than an errno.  Once all
instances are converted, vm_fault_t will become
a distinct type.

see commit 1c8f422059ae ("mm: change return type to
vm_fault_t") for reference.

Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
Reviewed-by: Matthew Wilcox <mawilcox@...rosoft.com>
---
 fs/nfs/file.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 81cca49..29553fd 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -532,13 +532,13 @@ static void nfs_swap_deactivate(struct file *file)
  * writable, implying that someone is about to modify the page through a
  * shared-writable mapping
  */
-static int nfs_vm_page_mkwrite(struct vm_fault *vmf)
+static vm_fault_t nfs_vm_page_mkwrite(struct vm_fault *vmf)
 {
 	struct page *page = vmf->page;
 	struct file *filp = vmf->vma->vm_file;
 	struct inode *inode = file_inode(filp);
 	unsigned pagelen;
-	int ret = VM_FAULT_NOPAGE;
+	vm_fault_t ret = VM_FAULT_NOPAGE;
 	struct address_space *mapping;

 	dfprintk(PAGECACHE, "NFS: vm_page_mkwrite(%pD2(%lu), offset %lld)\n",
--
1.9.1