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authorDavid Hildenbrand <david@redhat.com>2020-02-03 17:34:02 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-02-04 03:05:23 +0000
commit4c6058814ec4460c25111e29452ef596acdcd61b (patch)
treed506490630a5afe627176fb400380a92dfe3f797 /mm/page_alloc.c
parent948c436e463d34e0d716aff0f333bb74471e5399 (diff)
downloadlinux-4c6058814ec4460c25111e29452ef596acdcd61b.tar.bz2
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.c11
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)