redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

idr: fix RCU lockdep splat in idr_get_next() 

Convert to rcu_dereference_raw() given that many callers may have many
different locking models.

Located-by: Miles Lane <miles.lane@gmail.com>
Tested-by: Miles Lane <miles.lane@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
hifive-unleashed-5.1
Paul E. McKenney 2010-06-07 17:09:45 -07:00
parent f3b577dec1
commit 94bfa3b669
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
lib/idr.c
View File

@ -602,7 +602,7 @@ void *idr_get_next(struct idr *idp, int *nextidp)
/* find first ent */
n = idp->layers * IDR_BITS;
max = 1 << n;
p = rcu_dereference(idp->top);
p = rcu_dereference_raw(idp->top);
if (!p)
return NULL;
@ -610,7 +610,7 @@ void *idr_get_next(struct idr *idp, int *nextidp)
while (n > 0 && p) {
n -= IDR_BITS;
*paa++ = p;
p = rcu_dereference(p->ary[(id >> n) & IDR_MASK]);
p = rcu_dereference_raw(p->ary[(id >> n) & IDR_MASK]);
}
if (p) {