Re: [PATCH 1/6] mm: move drivers/char/mem.c to mm/char-mem.c

[Mike Rapoport]

On Wed, Sep 02, 2026 at 07:00:18PM +0100, Lorenzo Stoakes (ARM) wrote:
> The memory character driver implements several mm-specific features and is
> always compiled into the kernel, so move it to mm/ where it belongs.
> 
> Among other things the driver implements /dev/mem which provides raw access
> to physical memory, and /dev/zero which either allows mapping of a shmem
> region (if mapped with MAP_SHARED) or, uniquely, anonymous memory (if
> mapped MAP_PRIVATE).
> 
> This change lays the foundations to allow MAP_PRIVATE-/dev/zero to be
> mapped precisely the same as anonymous memory is mapped as currently it is
> an edge case within mm.
> 
> Also update a couple of comments that reference 'drivers/char/mem.c' to
> reference 'mm/char-mem.c'.
> 
> Signed-off-by: Lorenzo Stoakes (ARM) <ljs@xxxxxxxxxx>

Acked-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>

> ---
>  MAINTAINERS                         | 4 ++--
>  drivers/char/Makefile               | 2 +-
>  mm/Makefile                         | 3 ++-
>  drivers/char/mem.c => mm/char-mem.c | 2 +-
>  mm/shmem.c                          | 2 +-
>  5 files changed, 7 insertions(+), 6 deletions(-)

-- 
Sincerely yours,
Mike.