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| author | Wei Yang <richard.weiyang@gmail.com> | 2018-06-07 17:06:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-06-07 17:34:35 -0700 |
| commit | d538c164fc018bdb79f07f904fa9d48acf18bb0a (patch) | |
| tree | 229420d94dcf7f7c0950d8b92cf621501167525c /mm | |
| parent | 688272809fcce5b17fcefd5892b59f3788efb144 (diff) | |
| download | linux-0-day-d538c164fc018bdb79f07f904fa9d48acf18bb0a.tar.gz linux-0-day-d538c164fc018bdb79f07f904fa9d48acf18bb0a.tar.xz | |
mm/sparse.c: check __highest_present_section_nr only for a present section
When searching a present section, there are two boundaries:
* __highest_present_section_nr
* NR_MEM_SECTIONS
And it is known, __highest_present_section_nr is a more strict boundary
than NR_MEM_SECTIONS. This means it would be necessary to check
__highest_present_section_nr only.
Link: http://lkml.kernel.org/r/20180326081956.75275-2-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Acked-by: David Rientjes <rientjes@google.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/sparse.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/mm/sparse.c b/mm/sparse.c index 73dc2fcc0eab2..3570ff294ab1c 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -190,15 +190,13 @@ static inline int next_present_section_nr(int section_nr) section_nr++; if (present_section_nr(section_nr)) return section_nr; - } while ((section_nr < NR_MEM_SECTIONS) && - (section_nr <= __highest_present_section_nr)); + } while ((section_nr <= __highest_present_section_nr)); return -1; } #define for_each_present_section_nr(start, section_nr) \ for (section_nr = next_present_section_nr(start-1); \ ((section_nr >= 0) && \ - (section_nr < NR_MEM_SECTIONS) && \ (section_nr <= __highest_present_section_nr)); \ section_nr = next_present_section_nr(section_nr)) |