The patch titled
lockdep: handle chains involving classes defined in modules
has been removed from the -mm tree. Its filename was
lockdep-handle-chains-involving-classes-defined-in-modules.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: lockdep: handle chains involving classes defined in modules
From: Rabin Vincent <rabin@xxxxxx>
/proc/lockdep_chains currently oopses after any module which creates and
uses a lock is unloaded. This is because one of the chains involves a
class which was defined in the module just unloaded.
Solve this by marking the classes as unused and not printing information
about the unused classes.
Reported-by: Eric Sesterhenn <snakebyte@xxxxxx>
Signed-off-by: Rabin Vincent <rabin@xxxxxx>
Acked-by: Huang Ying <ying.huang@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/lockdep.c | 1 +
kernel/lockdep_proc.c | 3 +++
2 files changed, 4 insertions(+)
diff -puN kernel/lockdep.c~lockdep-handle-chains-involving-classes-defined-in-modules kernel/lockdep.c
--- a/kernel/lockdep.c~lockdep-handle-chains-involving-classes-defined-in-modules
+++ a/kernel/lockdep.c
@@ -3174,6 +3174,7 @@ static void zap_class(struct lock_class
list_del_rcu(&class->hash_entry);
list_del_rcu(&class->lock_entry);
+ class->key = NULL;
}
static inline int within(const void *addr, void *start, unsigned long size)
diff -puN kernel/lockdep_proc.c~lockdep-handle-chains-involving-classes-defined-in-modules kernel/lockdep_proc.c
--- a/kernel/lockdep_proc.c~lockdep-handle-chains-involving-classes-defined-in-modules
+++ a/kernel/lockdep_proc.c
@@ -201,6 +201,9 @@ static int lc_show(struct seq_file *m, v
for (i = 0; i < chain->depth; i++) {
class = lock_chain_get_class(chain, i);
+ if (!class->key)
+ continue;
+
seq_printf(m, "[%p] ", class->key);
print_name(m, class);
seq_puts(m, "\n");
_
Patches currently in -mm which might be from rabin@xxxxxx are
origin.patch
cpuidle-make-sysfs-attributes-sysdev-class-attributes.patch
linux-next.patch
--
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
