don't bother with ->d_inode->i_sb - it's always equal to ->d_sb

... and neither can ever be NULL

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c
index e6ea9d4..84c6d11 100644
--- a/security/integrity/evm/evm_main.c
+++ b/security/integrity/evm/evm_main.c
@@ -299,8 +299,8 @@
 			return 0;
 
 		/* exception for pseudo filesystems */
-		if (dentry->d_inode->i_sb->s_magic == TMPFS_MAGIC
-		    || dentry->d_inode->i_sb->s_magic == SYSFS_MAGIC)
+		if (dentry->d_sb->s_magic == TMPFS_MAGIC
+		    || dentry->d_sb->s_magic == SYSFS_MAGIC)
 			return 0;
 
 		integrity_audit_msg(AUDIT_INTEGRITY_METADATA,