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| author | Wei Yang <richard.weiyang@gmail.com> | 2017-07-06 15:36:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-06 16:24:31 -0700 |
| commit | 172ffeb9b9c284c6676ce03721cccf9b4ec6680b (patch) | |
| tree | 687c145e37bd9d7ffb9f2f41f0ea4f1575764714 /mm/nobootmem.c | |
| parent | f2f43e566a02a3bdde0a65e6a2e88d707c212a29 (diff) | |
| download | linux-172ffeb9b9c284c6676ce03721cccf9b4ec6680b.tar.gz linux-172ffeb9b9c284c6676ce03721cccf9b4ec6680b.tar.bz2 linux-172ffeb9b9c284c6676ce03721cccf9b4ec6680b.zip | |
mm/nobootmem.c: return 0 when start_pfn equals end_pfn
When start_pfn equals end_pfn, __free_pages_memory() has no effect and
__free_memory_core() will finally return (end_pfn - start_pfn) = 0.
This patch returns 0 directly when start_pfn equals end_pfn.
Link: http://lkml.kernel.org/r/20170502131115.6650-1-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/nobootmem.c')
| -rw-r--r-- | mm/nobootmem.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/nobootmem.c b/mm/nobootmem.c index 487dad610731..36454d0f96ee 100644 --- a/mm/nobootmem.c +++ b/mm/nobootmem.c @@ -118,7 +118,7 @@ static unsigned long __init __free_memory_core(phys_addr_t start, unsigned long end_pfn = min_t(unsigned long, PFN_DOWN(end), max_low_pfn); - if (start_pfn > end_pfn) + if (start_pfn >= end_pfn) return 0; __free_pages_memory(start_pfn, end_pfn); |