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iommu/iova: Use rb_entry() 

To make the code clearer, use rb_entry() instead of container_of() to
deal with rbtree.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Geliang Tang 2016-12-19 22:46:58 +08:00 committed by Joerg Roedel
parent 0c744ea4f7
commit eba484b51b
1 changed files with 11 additions and 12 deletions
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23
drivers/iommu/iova.c
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@ -62,7 +62,7 @@ __get_cached_rbnode(struct iova_domain *iovad, unsigned long *limit_pfn)
else {
struct rb_node *prev_node = rb_prev(iovad->cached32_node);
struct iova *curr_iova =
container_of(iovad->cached32_node, struct iova, node);
rb_entry(iovad->cached32_node, struct iova, node);
*limit_pfn = curr_iova->pfn_lo - 1;
return prev_node;
}
@ -86,11 +86,11 @@ __cached_rbnode_delete_update(struct iova_domain *iovad, struct iova *free)
if (!iovad->cached32_node)
return;
curr = iovad->cached32_node;
cached_iova = container_of(curr, struct iova, node);
cached_iova = rb_entry(curr, struct iova, node);
if (free->pfn_lo >= cached_iova->pfn_lo) {
struct rb_node *node = rb_next(&free->node);
struct iova *iova = container_of(node, struct iova, node);
struct iova *iova = rb_entry(node, struct iova, node);
/* only cache if it's below 32bit pfn */
if (node && iova->pfn_lo < iovad->dma_32bit_pfn)
@ -125,7 +125,7 @@ static int __alloc_and_insert_iova_range(struct iova_domain *iovad,
curr = __get_cached_rbnode(iovad, &limit_pfn);
prev = curr;
while (curr) {
struct iova *curr_iova = container_of(curr, struct iova, node);
struct iova *curr_iova = rb_entry(curr, struct iova, node);
if (limit_pfn < curr_iova->pfn_lo)
goto move_left;
@ -171,8 +171,7 @@ move_left:
/* Figure out where to put new node */
while (*entry) {
struct iova *this = container_of(*entry,
struct iova, node);
struct iova *this = rb_entry(*entry, struct iova, node);
parent = *entry;
if (new->pfn_lo < this->pfn_lo)
@ -201,7 +200,7 @@ iova_insert_rbtree(struct rb_root *root, struct iova *iova)
struct rb_node **new = &(root->rb_node), *parent = NULL;
/* Figure out where to put new node */
while (*new) {
struct iova *this = container_of(*new, struct iova, node);
struct iova *this = rb_entry(*new, struct iova, node);
parent = *new;
@ -311,7 +310,7 @@ private_find_iova(struct iova_domain *iovad, unsigned long pfn)
assert_spin_locked(&iovad->iova_rbtree_lock);
while (node) {
struct iova *iova = container_of(node, struct iova, node);
struct iova *iova = rb_entry(node, struct iova, node);
/* If pfn falls within iova's range, return iova */
if ((pfn >= iova->pfn_lo) && (pfn <= iova->pfn_hi)) {
@ -463,7 +462,7 @@ void put_iova_domain(struct iova_domain *iovad)
spin_lock_irqsave(&iovad->iova_rbtree_lock, flags);
node = rb_first(&iovad->rbroot);
while (node) {
struct iova *iova = container_of(node, struct iova, node);
struct iova *iova = rb_entry(node, struct iova, node);
rb_erase(node, &iovad->rbroot);
free_iova_mem(iova);
@ -477,7 +476,7 @@ static int
__is_range_overlap(struct rb_node *node,
unsigned long pfn_lo, unsigned long pfn_hi)
{
struct iova *iova = container_of(node, struct iova, node);
struct iova *iova = rb_entry(node, struct iova, node);
if ((pfn_lo <= iova->pfn_hi) && (pfn_hi >= iova->pfn_lo))
return 1;
@ -541,7 +540,7 @@ reserve_iova(struct iova_domain *iovad,
spin_lock_irqsave(&iovad->iova_rbtree_lock, flags);
for (node = rb_first(&iovad->rbroot); node; node = rb_next(node)) {
if (__is_range_overlap(node, pfn_lo, pfn_hi)) {
iova = container_of(node, struct iova, node);
iova = rb_entry(node, struct iova, node);
__adjust_overlap_range(iova, &pfn_lo, &pfn_hi);
if ((pfn_lo >= iova->pfn_lo) &&
(pfn_hi <= iova->pfn_hi))
@ -578,7 +577,7 @@ copy_reserved_iova(struct iova_domain *from, struct iova_domain *to)
spin_lock_irqsave(&from->iova_rbtree_lock, flags);
for (node = rb_first(&from->rbroot); node; node = rb_next(node)) {
struct iova *iova = container_of(node, struct iova, node);
struct iova *iova = rb_entry(node, struct iova, node);
struct iova *new_iova;
new_iova = reserve_iova(to, iova->pfn_lo, iova->pfn_hi);