Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzi...

[pandora-kernel.git] / lib / idr.c

diff --git a/lib/idr.c b/lib/idr.c
index 0dc7822..c1a2069 100644 (file)
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -445,6 +445,7 @@ EXPORT_SYMBOL(idr_remove);
 void idr_remove_all(struct idr *idp)
 {
        int n, id, max;
+       int bt_mask;
        struct idr_layer *p;
        struct idr_layer *pa[MAX_LEVEL];
        struct idr_layer **paa = &pa[0];
@@ -462,8 +463,10 @@ void idr_remove_all(struct idr *idp)
                        p = p->ary[(id >> n) & IDR_MASK];
                }
 
+               bt_mask = id;
                id += 1 << n;
-               while (n < fls(id)) {
+               /* Get the highest bit that the above add changed from 0->1. */
+               while (n < fls(id ^ bt_mask)) {
                        if (p)
                                free_layer(p);
                        n += IDR_BITS;
@@ -504,7 +507,7 @@ void *idr_find(struct idr *idp, int id)
        int n;
        struct idr_layer *p;
 
-       p = rcu_dereference(idp->top);
+       p = rcu_dereference_raw(idp->top);
        if (!p)
                return NULL;
        n = (p->layer+1) * IDR_BITS;
@@ -519,7 +522,7 @@ void *idr_find(struct idr *idp, int id)
        while (n > 0 && p) {
                n -= IDR_BITS;
                BUG_ON(n != p->layer*IDR_BITS);
-               p = rcu_dereference(p->ary[(id >> n) & IDR_MASK]);
+               p = rcu_dereference_raw(p->ary[(id >> n) & IDR_MASK]);
        }
        return((void *)p);
 }
@@ -552,7 +555,7 @@ int idr_for_each(struct idr *idp,
        struct idr_layer **paa = &pa[0];
 
        n = idp->layers * IDR_BITS;
-       p = rcu_dereference(idp->top);
+       p = rcu_dereference_raw(idp->top);
        max = 1 << n;
 
        id = 0;
@@ -560,7 +563,7 @@ int idr_for_each(struct idr *idp,
                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) {
@@ -623,7 +626,7 @@ void *idr_get_next(struct idr *idp, int *nextidp)
        }
        return NULL;
 }
-
+EXPORT_SYMBOL(idr_get_next);
 
 
 /**