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IB/mthca: Clean up mthca array index mask 

Define a constant MTHCA_ARRAY_MASK to replace repeated uses of
(PAGE_SIZE / sizeof (void *) - 1) in mthca array code.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Roland Dreier 2006-08-03 09:44:22 -07:00
parent bf74c7479e
commit 69e9fbb460
1 changed files with 7 additions and 8 deletions
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15
drivers/infiniband/hw/mthca/mthca_allocator.c
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@ -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",