Re: [PATCH] mm, vc_screen: move __free() handler that frees a page to a common header

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Mon, Oct 20, 2025 at 05:30:55PM +0300, Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)" <rppt@kernel.org>
> 
> vc_screen defines __free() handler that frees a page using free_page().
> Move that definition to include/linux/gfp.h next to free_page() and
> rename it from free_page_ptr to free_page.
> 
> Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
> ---
>  drivers/tty/vt/vc_screen.c | 6 ++----
>  include/linux/gfp.h        | 2 ++
>  2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c
> index c814644ef4ee..d2029f029de6 100644
> --- a/drivers/tty/vt/vc_screen.c
> +++ b/drivers/tty/vt/vc_screen.c
> @@ -53,8 +53,6 @@
>  #define HEADER_SIZE	4u
>  #define CON_BUF_SIZE (IS_ENABLED(CONFIG_BASE_SMALL) ? 256 : PAGE_SIZE)
>  
> -DEFINE_FREE(free_page_ptr, void *, if (_T) free_page((unsigned long)_T));
> -
>  /*
>   * Our minor space:
>   *
> @@ -371,7 +369,7 @@ vcs_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
>  	loff_t pos;
>  	bool viewed, attr, uni_mode;
>  
> -	char *con_buf __free(free_page_ptr) = (char *)__get_free_page(GFP_KERNEL);
> +	char *con_buf __free(free_page) = (char *)__get_free_page(GFP_KERNEL);

As per the other thread recently, why can't we just use kmalloc() here
instead?

thanks,

greg k-h