[RFC][PATCH 16/42] now we can fold open_check_o_direct() into do_dentry_open()

[Al Viro]

From: Al Viro <v...@zeniv.linux.org.uk>

Signed-off-by: Al Viro <v...@zeniv.linux.org.uk>
---
 fs/internal.h |  1 -
 fs/namei.c    |  7 +------
 fs/open.c     | 17 +++++------------
 3 files changed, 6 insertions(+), 19 deletions(-)

diff --git a/fs/internal.h b/fs/internal.h
index ab84a29f4874..33a28438570e 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -125,7 +125,6 @@ int do_fchmodat(int dfd, const char __user *filename, 
umode_t mode);
 int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
                int flag);
 
-extern int open_check_o_direct(struct file *f);
 extern int vfs_open(const struct path *, struct file *);
 
 /*
diff --git a/fs/namei.c b/fs/namei.c
index 5a79bd170410..39b5da70d6f5 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3401,9 +3401,7 @@ static int do_last(struct nameidata *nd,
                goto out;
        *opened |= FILE_OPENED;
 opened:
-       error = open_check_o_direct(file);
-       if (!error)
-               error = ima_file_check(file, op->acc_mode, *opened);
+       error = ima_file_check(file, op->acc_mode, *opened);
        if (!error && will_truncate)
                error = handle_truncate(file);
 out:
@@ -3479,9 +3477,6 @@ static int do_tmpfile(struct nameidata *nd, unsigned 
flags,
                goto out2;
        file->f_path.mnt = path.mnt;
        error = finish_open(file, child, NULL, opened);
-       if (error)
-               goto out2;
-       error = open_check_o_direct(file);
 out2:
        mnt_drop_write(path.mnt);
 out:
diff --git a/fs/open.c b/fs/open.c
index affdeebe5fd5..2aa3dc03e2fd 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -724,16 +724,6 @@ SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, 
gid_t, group)
        return ksys_fchown(fd, user, group);
 }
 
-int open_check_o_direct(struct file *f)
-{
-       /* NB: we're sure to have correct a_ops only after f_op->open */
-       if (f->f_flags & O_DIRECT) {
-               if (!f->f_mapping->a_ops || !f->f_mapping->a_ops->direct_IO)
-                       return -EINVAL;
-       }
-       return 0;
-}
-
 static int do_dentry_open(struct file *f,
                          struct inode *inode,
                          int (*open)(struct inode *, struct file *))
@@ -809,6 +799,11 @@ static int do_dentry_open(struct file *f,
 
        file_ra_state_init(&f->f_ra, f->f_mapping->host->i_mapping);
 
+       /* NB: we're sure to have correct a_ops only after f_op->open */
+       if (f->f_flags & O_DIRECT) {
+               if (!f->f_mapping->a_ops || !f->f_mapping->a_ops->direct_IO)
+                       return -EINVAL;
+       }
        return 0;
 
 cleanup_all:
@@ -925,8 +920,6 @@ struct file *dentry_open(const struct path *path, int flags,
        if (!IS_ERR(f)) {
                f->f_flags = flags;
                error = vfs_open(path, f);
-               if (!error)
-                       error = open_check_o_direct(f);
                if (error) {
                        fput(f);
                        f = ERR_PTR(error);
-- 
2.11.0