[PATCH v6] mm/memblock: Add memblock_alloc_or_panic interface

[Weikang Guo]

Mike Rapoport <rppt at kernel.org> wrote on Sunday, 22 December 2024 18:06
>
> On Sun, Dec 22, 2024 at 01:43:31PM +0800, Guo Weikang wrote:
> > Before SLUB initialization, various subsystems used memblock_alloc to
> > allocate memory. In most cases, when memory allocation fails, an immediate
> > panic is required. To simplify this behavior and reduce repetitive checks,
> > introduce `memblock_alloc_or_panic`. This function ensures that memory
> > allocation failures result in a panic automatically, improving code
> > readability and consistency across subsystems that require this behavior.
> >
> > Signed-off-by: Guo Weikang <guoweikang.kernel at gmail.com>
> > ---
>
> ...
>
> > diff --git a/include/linux/memblock.h b/include/linux/memblock.h
> > index 673d5cae7c81..73af7ca3fa1c 100644
> > --- a/include/linux/memblock.h
> > +++ b/include/linux/memblock.h
> > @@ -417,6 +417,12 @@ static __always_inline void *memblock_alloc(phys_addr_t size, phys_addr_t align)
> >                                     MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
> >  }
> >
> > +void *__memblock_alloc_or_panic(phys_addr_t size, phys_addr_t align,
> > +                                    const char *func);
>
> Please align this line with the first parameter to the function.
> Other than that
>
> Acked-by: Mike Rapoport (Microsoft) <rppt at kernel.org>
>

Got it!  Thanks for the feedback!

> > +
> > +#define memblock_alloc_or_panic(size, align)    \
> > +      __memblock_alloc_or_panic(size, align, __func__)
> > +
> >  static inline void *memblock_alloc_raw(phys_addr_t size,
> >                                              phys_addr_t align)
> >  {
>
>
> --
> Sincerely yours,
> Mike.

Best regards.
Guo