On Sun, Apr 28, 2024 at 10:10:17PM +0900, DaeRo Lee wrote:
> 2024년 4월 28일 (일) 오후 9:55, <skseofh@xxxxxxxxx>님이 작성:
> >
> > From: Daero Lee <daero_le.lee@xxxxxxxxxxx>
> >
> > In early_init_dt_reserve_memory we only add memory w/o no-map flag to
> > memblock.reserved. But we need to add memory w/ no-map flag to
> > memblock.reserved, because NOMAP and memblock.reserved are semantically
> > different.
> >
> > Signed-off-by: Daero Lee <daero_le.lee@xxxxxxxxxxx>
> > ---
> > drivers/of/of_reserved_mem.c | 3 ++-
> > 1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
> > index 8236ecae2953..1c916da8adaf 100644
> > --- a/drivers/of/of_reserved_mem.c
> > +++ b/drivers/of/of_reserved_mem.c
> > @@ -91,7 +91,8 @@ static int __init early_init_dt_reserve_memory(phys_addr_t base,
> > memblock_is_region_reserved(base, size))
> > return -EBUSY;
> >
> > - return memblock_mark_nomap(base, size);
> > + if (memblock_mark_nomap(base, size))
> > + return;
> Sorry. The return value is wrong.
>
> Here is what I want to do:
>
> --- a/drivers/of/of_reserved_mem.c
> +++ b/drivers/of/of_reserved_mem.c
> @@ -81,6 +81,7 @@ static void __init
> fdt_reserved_mem_save_node(unsigned long node, const char *un
> static int __init early_init_dt_reserve_memory(phys_addr_t base,
> phys_addr_t size, bool nomap)
> {
> + int err = 0;
> if (nomap) {
> /*
> * If the memory is already reserved (by another region), we
> @@ -91,7 +92,10 @@ static int __init
> early_init_dt_reserve_memory(phys_addr_t base,
> memblock_is_region_reserved(base, size))
> return -EBUSY;
>
> - return memblock_mark_nomap(base, size);
> +
> + err = memblock_mark_nomap(base, size);
> + if (err)
> + return err;
> }
> return memblock_reserve(base, size);
> }
Makes sense to me.
> Regards,
> DaeRo Lee
--
Sincerely yours,
Mike.
