[PATCH v6 1/8] fs: introduce kernel_pread_file* support

[Matthew Wilcox]

On Fri, Jun 05, 2020 at 03:59:52PM -0700, Scott Branden wrote:
> -int kernel_read_file(struct file *file, void **buf, loff_t *size,
> -		     loff_t max_size, enum kernel_read_file_id id)
> -{
> -	loff_t i_size, pos;
> +int kernel_pread_file(struct file *file, void **buf, loff_t *size,
> +		      loff_t pos, loff_t max_size,
> +		      enum kernel_pread_opt opt,
> +		      enum kernel_read_file_id id)

What is this 'kernel_pread_opt' foolishness?  Why not just pass in
~0UL as max_size if you want the entire file?

> -int kernel_read_file_from_path_initns(const char *path, void **buf,
> -				      loff_t *size, loff_t max_size,
> -				      enum kernel_read_file_id id)
> +extern int kernel_pread_file_from_path_initns(const char *path, void **buf,

extern?  really?  i'm shocked gcc doesn't vomit on that.