From: Alexey Dobriyan <adobriyan@xxxxxxxxx> Subject: mm/mmzone.c: make "migratetype_names" const char * Those strings are immutable in fact. Link: http://lkml.kernel.org/r/20181124090327.GA10877@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx> Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- --- a/include/linux/mmzone.h~mm-make-migratetype_names-const-char +++ a/include/linux/mmzone.h @@ -65,7 +65,7 @@ enum migratetype { }; /* In mm/page_alloc.c; keep in sync also with show_migration_types() there */ -extern char * const migratetype_names[MIGRATE_TYPES]; +extern const char * const migratetype_names[MIGRATE_TYPES]; #ifdef CONFIG_CMA # define is_migrate_cma(migratetype) unlikely((migratetype) == MIGRATE_CMA) --- a/mm/page_alloc.c~mm-make-migratetype_names-const-char +++ a/mm/page_alloc.c @@ -236,7 +236,7 @@ static char * const zone_names[MAX_NR_ZO #endif }; -char * const migratetype_names[MIGRATE_TYPES] = { +const char * const migratetype_names[MIGRATE_TYPES] = { "Unmovable", "Movable", "Reclaimable", _
