From: Jan Kara <jack@suse.cz>
Date: Wed, 1 Nov 2017 15:36:34 +0000 (+0100)
Subject: dax: Create local variable for VMA in dax_iomap_pte_fault()
X-Git-Tag: v4.19~2155^2^2~19
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a0987ad5c576626fdb40547f5ac99b4f90608dda;p=platform%2Fkernel%2Flinux-rpi.git

dax: Create local variable for VMA in dax_iomap_pte_fault()

There are already two users and more are coming.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---

diff --git a/fs/dax.c b/fs/dax.c
index 116eef8..c094658 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1108,7 +1108,8 @@ static int dax_fault_return(int error)
 static int dax_iomap_pte_fault(struct vm_fault *vmf,
 			       const struct iomap_ops *ops)
 {
-	struct address_space *mapping = vmf->vma->vm_file->f_mapping;
+	struct vm_area_struct *vma = vmf->vma;
+	struct address_space *mapping = vma->vm_file->f_mapping;
 	struct inode *inode = mapping->host;
 	unsigned long vaddr = vmf->address;
 	loff_t pos = (loff_t)vmf->pgoff << PAGE_SHIFT;
@@ -1196,7 +1197,7 @@ static int dax_iomap_pte_fault(struct vm_fault *vmf,
 	case IOMAP_MAPPED:
 		if (iomap.flags & IOMAP_F_NEW) {
 			count_vm_event(PGMAJFAULT);
-			count_memcg_event_mm(vmf->vma->vm_mm, PGMAJFAULT);
+			count_memcg_event_mm(vma->vm_mm, PGMAJFAULT);
 			major = VM_FAULT_MAJOR;
 		}
 		error = dax_insert_mapping(vmf, &iomap, pos, entry);