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authorJiang Liu <jiang.liu@linux.intel.com>2014-02-19 14:07:32 +0800
committerJoerg Roedel <joro@8bytes.org>2014-03-04 17:51:04 +0100
commitb683b230a244c3b2b3f6f3292e59d4a63298528b (patch)
treea63de166724a05b0a5fff0f23ab2dd83ec65d0b7 /include/linux
parentb5f82ddf22725146d926c56ea4cb80df9b34b6b9 (diff)
iommu/vt-d: Introduce macro for_each_dev_scope() to walk device scope entries
Introduce for_each_dev_scope()/for_each_active_dev_scope() to walk {active} device scope entries. This will help following RCU lock related patches. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/dmar.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index ea599d4ca9e0..4b77fd8fde76 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -65,6 +65,12 @@ extern struct list_head dmar_drhd_units;
list_for_each_entry(drhd, &dmar_drhd_units, list) \
if (i=drhd->iommu, 0) {} else
+#define for_each_dev_scope(a, c, p, d) \
+ for ((p) = 0; ((d) = (p) < (c) ? (a)[(p)] : NULL, (p) < (c)); (p)++)
+
+#define for_each_active_dev_scope(a, c, p, d) \
+ for_each_dev_scope((a), (c), (p), (d)) if (!(d)) { continue; } else
+
extern int dmar_table_init(void);
extern int dmar_dev_scope_init(void);
extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,