lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Mon, 13 May 2019 17:11:49 +0800 From: Yuyang Du <duyuyang@...il.com> To: peterz@...radead.org, will.deacon@....com, mingo@...nel.org Cc: bvanassche@....org, ming.lei@...hat.com, frederic@...nel.org, tglx@...utronix.de, boqun.feng@...il.com, linux-kernel@...r.kernel.org, Yuyang Du <duyuyang@...il.com> Subject: [PATCH 03/17] locking/lockdep: Add helper functions to operate on the searched path - find_lock_in_path() tries to find whether a lock class is in the path. - find_next_dep_in_path() returns the next dependency after a given dependency in the path. Signed-off-by: Yuyang Du <duyuyang@...il.com> --- kernel/locking/lockdep.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 4091002..0617375 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -1365,6 +1365,37 @@ static inline int get_lock_depth(struct lock_list *child) } /* + * Return the dependency if @lock is in the path, otherwise NULL. + */ +static inline struct lock_list * +find_lock_in_path(struct lock_class *lock, struct lock_list *target) +{ + while ((target = get_lock_parent(target))) + if (target->class == lock) + return target; + + return NULL; +} + +/* + * Walk back to the next dependency after @source from @target. Note + * that @source must be in the path, and @source can not be the same as + * @target, otherwise this is going to fail and reutrn NULL. + */ +static inline struct lock_list * +find_next_dep_in_path(struct lock_list *source, struct lock_list *target) +{ + while (get_lock_parent(target) != source) { + target = get_lock_parent(target); + + if (!target) + break; + } + + return target; +} + +/* * Return the forward or backward dependency list. * * @lock: the lock_list to get its class's dependency list -- 1.8.3.1
Powered by blists - more mailing lists