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SubjectRe: [PATCH 0/3] mm: sparse: remove __section_nr() function
On Fri, Jul 02, 2021 at 06:41:29PM +0900, Ohhoon Kwon wrote:
> This series contains cleanups to remove __section_nr().
>
> When CONFIG_SPARSEMEM_EXTREME is enabled, __section_nr() could be
> costly since it iterates all section roots to check if the given
> mem_section is in its range.
>
> On the other hand, __nr_to_section which converts section_nr to
> mem_section can be done in O(1).
>
> The only users of __section_nr() was section_mark_present() and
> find_memory_block().
>
> PATCH 1 & 2 changes both functions to use section_nr instead of
> mem_section.
> PATCH 3 finally removes __section_nr() function.
>
> More details can be found in each changelogs.
>
> Ohhoon Kwon (3):
> mm: sparse: pass section_nr to section_mark_present
> mm: sparse: pass section_nr to find_memory_block
> mm: sparse: remove __section_nr() function
>
> .../platforms/pseries/hotplug-memory.c | 4 +--
> drivers/base/memory.c | 4 +--
> include/linux/memory.h | 2 +-
> include/linux/mmzone.h | 1 -
> mm/sparse.c | 35 +++----------------
> 5 files changed, 9 insertions(+), 37 deletions(-)
>
> --
> 2.17.1

For the series:

Acked-by: Mike Rapoport <rppt@linux.ibm.com>

--
Sincerely yours,
Mike.

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