commit c8f0fb36bffa9e21d214a2910b825567d52bfc2c
author Joerg Roedel <joerg.roedel@amd.com> Fri Dec 12 15:14:21 2008 +0100
committer Joerg Roedel <joerg.roedel@amd.com> Sat Jan 03 14:11:59 2009 +0100
tree 6bd89aae7d27da187c5bb8484d09527f2c3725d0
parent 55877a6bcdf0843414eecc658550c6551f5b5e1d

AMD IOMMU: add stats counter for alloc_coherent requests

Impact: see number of alloc_coherent requests in debugfs

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

arch/x86/kernel/amd_iommu.c

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 49f2c85..ecc89f8 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -69,6 +69,7 @@
 DECLARE_STATS_COUNTER(cnt_unmap_single);
 DECLARE_STATS_COUNTER(cnt_map_sg);
 DECLARE_STATS_COUNTER(cnt_unmap_sg);
+DECLARE_STATS_COUNTER(cnt_alloc_coherent);
 
 static struct dentry *stats_dir;
 static struct dentry *de_isolate;
@@ -100,6 +101,7 @@
 	amd_iommu_stats_add(&cnt_unmap_single);
 	amd_iommu_stats_add(&cnt_map_sg);
 	amd_iommu_stats_add(&cnt_unmap_sg);
+	amd_iommu_stats_add(&cnt_alloc_coherent);
 }
 
 #endif
@@ -1481,6 +1483,8 @@
 	phys_addr_t paddr;
 	u64 dma_mask = dev->coherent_dma_mask;
 
+	INC_STATS_COUNTER(cnt_alloc_coherent);
+
 	if (!check_device(dev))
 		return NULL;