[PATCH] remove tce_cache_blast_stress()

tce_cache_blast_stress was useful during bringup to stress the IOMMU's
cache flushing. Now that we quiesce DMAs on every cache flush, using
_stress() brings the machine down to its knees once you put it under
load. Remove this debug / bringup code that isn't useful anymore
completely.

Signed-off-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Jon Mason <jdmason@us.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>

diff --git a/arch/x86_64/kernel/pci-calgary.c b/arch/x86_64/kernel/pci-calgary.c
index 7c43cb0..cd86613 100644 (file)
--- a/arch/x86_64/kernel/pci-calgary.c
+++ b/arch/x86_64/kernel/pci-calgary.c
@@ -129,11 +129,6 @@ static void tce_cache_blast(struct iommu_table *tbl);
 #ifdef CONFIG_IOMMU_DEBUG
 int debugging __read_mostly = 1;
 
-static inline void tce_cache_blast_stress(struct iommu_table *tbl)
-{
-       tce_cache_blast(tbl);
-}
-
 static inline unsigned long verify_bit_range(unsigned long* bitmap,
        int expected, unsigned long start, unsigned long end)
 {
@@ -153,10 +148,6 @@ static inline unsigned long verify_bit_range(unsigned long* bitmap,
 #else /* debugging is disabled */
 int debugging __read_mostly = 0;
 
-static inline void tce_cache_blast_stress(struct iommu_table *tbl)
-{
-}
-
 static inline unsigned long verify_bit_range(unsigned long* bitmap,
        int expected, unsigned long start, unsigned long end)
 {
@@ -289,8 +280,6 @@ static void __iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr,
        }
 
        __clear_bit_string(tbl->it_map, entry, npages);
-
-       tce_cache_blast_stress(tbl);
 }
 
 static void iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr,