From: Alexey Dobriyan <adobriyan@xxxxxxxxx> Subject: mm/debug.c: make "migrate_reason_names[]" const char * Those strings are immutable as well. Link: http://lkml.kernel.org/r/20181124090508.GB10877@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx> Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- --- a/include/linux/migrate.h~mm-make-migrate_reason_names-const-char +++ a/include/linux/migrate.h @@ -29,7 +29,7 @@ enum migrate_reason { }; /* In mm/debug.c; also keep sync with include/trace/events/migrate.h */ -extern char *migrate_reason_names[MR_TYPES]; +extern const char *migrate_reason_names[MR_TYPES]; static inline struct page *new_page_nodemask(struct page *page, int preferred_nid, nodemask_t *nodemask) --- a/mm/debug.c~mm-make-migrate_reason_names-const-char +++ a/mm/debug.c @@ -17,7 +17,7 @@ #include "internal.h" -char *migrate_reason_names[MR_TYPES] = { +const char *migrate_reason_names[MR_TYPES] = { "compaction", "memory_failure", "memory_hotplug", _
