The patch titled
Subject: mm/nobootmem.c: return 0 when start_pfn equals end_pfn
has been added to the -mm tree. Its filename is
mm-nobootmem-return-0-when-start_pfn-equals-end_pfn.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-nobootmem-return-0-when-start_pfn-equals-end_pfn.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-nobootmem-return-0-when-start_pfn-equals-end_pfn.patch
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------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: 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@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/nobootmem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/nobootmem.c~mm-nobootmem-return-0-when-start_pfn-equals-end_pfn mm/nobootmem.c
--- a/mm/nobootmem.c~mm-nobootmem-return-0-when-start_pfn-equals-end_pfn
+++ a/mm/nobootmem.c
@@ -118,7 +118,7 @@ static unsigned long __init __free_memor
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);
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
mm-slub-remove-a-redundant-assignment-in-___slab_alloc.patch
mm-slub-reset-cpu_slabs-pointer-in-deactivate_slab.patch
mm-slub-pack-red_left_pad-with-another-int-to-save-a-word.patch
mm-slub-wrap-cpu_slab-partial-in-config_slub_cpu_partial.patch
mm-slub-wrap-kmem_cache-cpu_partial-in-config-config_slub_cpu_partial.patch
mm-nobootmem-return-0-when-start_pfn-equals-end_pfn.patch
mm-page_alloc-return-0-in-case-this-node-has-no-page-within-the-zone.patch
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