The patch titled
Subject: mm: check __highest_present_section_nr directly in memory_dev_init()
has been added to the -mm tree. Its filename is
mm-check-__highest_present_sectioin_nr-directly-in-memory_dev_init.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-check-__highest_present_sectioin_nr-directly-in-memory_dev_init.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-check-__highest_present_sectioin_nr-directly-in-memory_dev_init.patch
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------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: mm: check __highest_present_section_nr directly in memory_dev_init()
__highest_present_section_nr is a more strict boundary than
NR_MEM_SECTIONS. So checking __highest_present_section_nr directly is
enough.
Link: http://lkml.kernel.org/r/20180330032044.21647-1-richard.weiyang@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/base/memory.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff -puN drivers/base/memory.c~mm-check-__highest_present_sectioin_nr-directly-in-memory_dev_init drivers/base/memory.c
--- a/drivers/base/memory.c~mm-check-__highest_present_sectioin_nr-directly-in-memory_dev_init
+++ a/drivers/base/memory.c
@@ -837,11 +837,8 @@ int __init memory_dev_init(void)
* during boot and have been initialized
*/
mutex_lock(&mem_sysfs_mutex);
- for (i = 0; i < NR_MEM_SECTIONS; i += sections_per_block) {
- /* Don't iterate over sections we know are !present: */
- if (i > __highest_present_section_nr)
- break;
-
+ for (i = 0; i <= __highest_present_section_nr;
+ i += sections_per_block) {
err = add_memory_block(i);
if (!ret)
ret = err;
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
mm-check-__highest_present_sectioin_nr-directly-in-memory_dev_init.patch
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