[PATCH 1/3] dax: fix S_DAX definition

Make sure S_DAX is defined in the CONFIG_FS_DAX=n + CONFIG_DEV_DAX=y case. Otherwise vma_is_dax() may incorrectly return false in the Device-DAX case. Cc: Alexander Viro <viro(a)zeniv.linux.org.uk&gt; Cc: linux-fsdevel(a)vger.kernel.org Cc: Christoph Hellwig <hch(a)lst.de&gt; Cc: Jan Kara <jack(a)suse.cz&gt; Cc: <stable(a)vger.kernel.org&gt; Fixes: dee410792419 ("/dev/dax, core: file operations and dax-mmap") Signed-off-by: Dan Williams <dan.j.williams(a)intel.com&gt; --- 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 511fbaabf624..a3329258ff5c 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1850,7 +1850,7 @@ struct super_operations { #define S_IMA 1024 /* Inode has an associated IMA struct */ #define S_AUTOMOUNT 2048 /* Automount/referral quasi-directory */ #define S_NOSEC 4096 /* no suid or xattr security attributes */ -#ifdef CONFIG_FS_DAX +#if IS_ENABLED(CONFIG_FS_DAX) || IS_ENABLED(CONFIG_DEV_DAX) #define S_DAX 8192 /* Direct Access, avoiding the page cache */ #else #define S_DAX 0 /* Make all the DAX code disappear */