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iommu/core: use the existing IS_ALIGNED macro

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Replace iommu's alignment checks with the existing IS_ALIGNED macro,
to drop a few lines of code and utilize IS_ALIGNED's type safety.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Ohad Ben-Cohen 2011-09-02 13:32:32 -04:00 committed by Joerg Roedel
parent 403f81d8ee
commit 4099818842
1 changed files with 3 additions and 6 deletions
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9
drivers/iommu/iommu.c
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@ -16,6 +16,7 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/bug.h>
#include <linux/types.h>
#include <linux/module.h>
@ -97,13 +98,11 @@ EXPORT_SYMBOL_GPL(iommu_domain_has_cap);
int iommu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, int gfp_order, int prot)
{
unsigned long invalid_mask;
size_t size;
size = 0x1000UL << gfp_order;
invalid_mask = size - 1;
BUG_ON((iova | paddr) & invalid_mask);
BUG_ON(!IS_ALIGNED(iova | paddr, size));
return iommu_ops->map(domain, iova, paddr, gfp_order, prot);
}
@ -111,13 +110,11 @@ EXPORT_SYMBOL_GPL(iommu_map);
int iommu_unmap(struct iommu_domain *domain, unsigned long iova, int gfp_order)
{
unsigned long invalid_mask;
size_t size;
size = 0x1000UL << gfp_order;
invalid_mask = size - 1;
BUG_ON(iova & invalid_mask);
BUG_ON(!IS_ALIGNED(iova, size));
return iommu_ops->unmap(domain, iova, gfp_order);
}