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; _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
