diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 9 | ||||
| -rw-r--r-- | lib/Makefile | 2 | ||||
| -rw-r--r-- | lib/list_debug.c | 5 |
3 files changed, 12 insertions, 4 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index fbc89baf7de6..c38745ad46eb 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1674,9 +1674,14 @@ menu "Debug kernel data structures" config DEBUG_LIST bool "Debug linked list manipulation" depends on DEBUG_KERNEL || BUG_ON_DATA_CORRUPTION + select LIST_HARDENED help - Enable this to turn on extended checks in the linked-list - walking routines. + Enable this to turn on extended checks in the linked-list walking + routines. + + This option trades better quality error reports for performance, and + is more suitable for kernel debugging. If you care about performance, + you should only enable CONFIG_LIST_HARDENED instead. If unsure, say N. diff --git a/lib/Makefile b/lib/Makefile index 42d307ade225..110936c9a68b 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -161,7 +161,7 @@ obj-$(CONFIG_BTREE) += btree.o obj-$(CONFIG_INTERVAL_TREE) += interval_tree.o obj-$(CONFIG_ASSOCIATIVE_ARRAY) += assoc_array.o obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o -obj-$(CONFIG_DEBUG_LIST) += list_debug.o +obj-$(CONFIG_LIST_HARDENED) += list_debug.o obj-$(CONFIG_DEBUG_OBJECTS) += debugobjects.o obj-$(CONFIG_BITREVERSE) += bitrev.o diff --git a/lib/list_debug.c b/lib/list_debug.c index 2def33b1491f..db602417febf 100644 --- a/lib/list_debug.c +++ b/lib/list_debug.c @@ -2,7 +2,8 @@ * Copyright 2006, Red Hat, Inc., Dave Jones * Released under the General Public License (GPL). * - * This file contains the linked list validation for DEBUG_LIST. + * This file contains the linked list validation and error reporting for + * LIST_HARDENED and DEBUG_LIST. */ #include <linux/export.h> @@ -17,6 +18,7 @@ * attempt). */ +__list_valid_slowpath bool __list_add_valid_or_report(struct list_head *new, struct list_head *prev, struct list_head *next) { @@ -39,6 +41,7 @@ bool __list_add_valid_or_report(struct list_head *new, struct list_head *prev, } EXPORT_SYMBOL(__list_add_valid_or_report); +__list_valid_slowpath bool __list_del_entry_valid_or_report(struct list_head *entry) { struct list_head *prev, *next; |