diff options
| author | David Hildenbrand <david@redhat.com> | 2020-02-03 17:34:02 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-02-04 03:05:23 +0000 |
| commit | 4c6058814ec4460c25111e29452ef596acdcd61b (patch) | |
| tree | d506490630a5afe627176fb400380a92dfe3f797 /mm/page_alloc.c | |
| parent | 948c436e463d34e0d716aff0f333bb74471e5399 (diff) | |
mm: factor out next_present_section_nr()
Let's move it to the header and use the shorter variant from
mm/page_alloc.c (the original one will also check
"__highest_present_section_nr + 1", which is not necessary). While at
it, make the section_nr in next_pfn() const.
In next_pfn(), we now return section_nr_to_pfn(-1) instead of -1 once we
exceed __highest_present_section_nr, which doesn't make a difference in
the caller as it is big enough (>= all sane end_pfn).
Link: http://lkml.kernel.org/r/20200113144035.10848-3-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: "Jin, Zhi" <zhi.jin@intel.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 461ed73bc30f..494f74a1725d 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5852,18 +5852,11 @@ overlap_memmap_init(unsigned long zone, unsigned long *pfn) /* Skip PFNs that belong to non-present sections */ static inline __meminit unsigned long next_pfn(unsigned long pfn) { - unsigned long section_nr; + const unsigned long section_nr = pfn_to_section_nr(++pfn); - section_nr = pfn_to_section_nr(++pfn); if (present_section_nr(section_nr)) return pfn; - - while (++section_nr <= __highest_present_section_nr) { - if (present_section_nr(section_nr)) - return section_nr_to_pfn(section_nr); - } - - return -1; + return section_nr_to_pfn(next_present_section_nr(section_nr)); } #else static inline __meminit unsigned long next_pfn(unsigned long pfn) |