[PATCH v7 1/9] fs: Constify vma argument to vma_is_dax

[Thomas HellstrÃm (VMware)]

From: "Thomas Hellstrom (VMware)" <thomas_os@xxxxxxxxxxxx>

The function is used by upcoming vma_is_special_huge() with which we want
to use a const vma argument. Since for vma_is_dax() the vma argument is
only dereferenced for reading, constify it.

Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Ralph Campbell <rcampbell@xxxxxxxxxx>
Cc: "JÃrÃme Glisse" <jglisse@xxxxxxxxxx>
Cc: "Christian KÃnig" <christian.koenig@xxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Thomas Hellstrom (VMware) <thomas_os@xxxxxxxxxxxx>
Reviewed-by: Roland Scheidegger <sroland@xxxxxxxxxx>
Acked-by: Christian KÃnig <christian.koenig@xxxxxxx>
---
 include/linux/fs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 3cd4fe6b845e..2b38ce5b73ad 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -3391,7 +3391,7 @@ static inline bool io_is_direct(struct file *filp)
 	return (filp->f_flags & O_DIRECT) || IS_DAX(filp->f_mapping->host);
 }
 
-static inline bool vma_is_dax(struct vm_area_struct *vma)
+static inline bool vma_is_dax(const struct vm_area_struct *vma)
 {
 	return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host);
 }
-- 
2.21.1