[PATCH] vfs: Move kernel_read_file() to fs/read_write.c

[David Howells]

Mimi Zohar <zohar at linux.ibm.com> wrote:

> > Move kernel_read_file() to fs/read_write.c and out of fs/exec.c as it's not
> > actually used by anything in the execve subsystem.
> 
> All files being opened by the kernel should be calling one of these
> helper routines.  Has that changed?

prepare_binprm() uses kernel_read() and has done since at least 2014.  The
binfmt drivers also use kernel_read().

Since kernel_read_file() is used by a bunch of things that aren't exec, even
if we switch exec to it, it should probably still go in fs/read_write.c since
it seems generic.

David