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authorWei Yang <richard.weiyang@gmail.com>2017-07-06 15:36:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-06 16:24:31 -0700
commit172ffeb9b9c284c6676ce03721cccf9b4ec6680b (patch)
tree687c145e37bd9d7ffb9f2f41f0ea4f1575764714 /mm/nobootmem.c
parentf2f43e566a02a3bdde0a65e6a2e88d707c212a29 (diff)
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.c2
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);