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path: root/drivers/infiniband/hw/mthca/mthca_allocator.c
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Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_allocator.c')
-rw-r--r--drivers/infiniband/hw/mthca/mthca_allocator.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_allocator.c b/drivers/infiniband/hw/mthca/mthca_allocator.c
index 848e583273d..25157f57a6d 100644
--- a/drivers/infiniband/hw/mthca/mthca_allocator.c
+++ b/drivers/infiniband/hw/mthca/mthca_allocator.c
@@ -108,14 +108,15 @@ void mthca_alloc_cleanup(struct mthca_alloc *alloc)
* serialize access to the array.
*/
+#define MTHCA_ARRAY_MASK (PAGE_SIZE / sizeof (void *) - 1)
+
void *mthca_array_get(struct mthca_array *array, int index)
{
int p = (index * sizeof (void *)) >> PAGE_SHIFT;
- if (array->page_list[p].page) {
- int i = index & (PAGE_SIZE / sizeof (void *) - 1);
- return array->page_list[p].page[i];
- } else
+ if (array->page_list[p].page)
+ return array->page_list[p].page[index & MTHCA_ARRAY_MASK];
+ else
return NULL;
}
@@ -130,8 +131,7 @@ int mthca_array_set(struct mthca_array *array, int index, void *value)
if (!array->page_list[p].page)
return -ENOMEM;
- array->page_list[p].page[index & (PAGE_SIZE / sizeof (void *) - 1)] =
- value;
+ array->page_list[p].page[index & MTHCA_ARRAY_MASK] = value;
++array->page_list[p].used;
return 0;
@@ -145,8 +145,7 @@ void mthca_array_clear(struct mthca_array *array, int index)
free_page((unsigned long) array->page_list[p].page);
array->page_list[p].page = NULL;
} else
- array->page_list[p].page[index & (PAGE_SIZE /
- sizeof (void *) - 1)] = NULL;
+ array->page_list[p].page[index & MTHCA_ARRAY_MASK] = NULL;
if (array->page_list[p].used < 0)
pr_debug("Array %p index %d page %d with ref count %d < 0\n",