Merge branches 'doc', 'multitouch', 'upstream' and 'upstream-fixes' into for-linus

[pandora-kernel.git] / arch / blackfin / mach-common / smp.c

diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c
index 6e17a26..8bce5ed 100644 (file)
--- a/arch/blackfin/mach-common/smp.c
+++ b/arch/blackfin/mach-common/smp.c
@@ -109,10 +109,23 @@ static void ipi_flush_icache(void *info)
        struct blackfin_flush_data *fdata = info;
 
        /* Invalidate the memory holding the bounds of the flushed region. */
-       invalidate_dcache_range((unsigned long)fdata,
-               (unsigned long)fdata + sizeof(*fdata));
+       blackfin_dcache_invalidate_range((unsigned long)fdata,
+                                        (unsigned long)fdata + sizeof(*fdata));
+
+       /* Make sure all write buffers in the data side of the core
+        * are flushed before trying to invalidate the icache.  This
+        * needs to be after the data flush and before the icache
+        * flush so that the SSYNC does the right thing in preventing
+        * the instruction prefetcher from hitting things in cached
+        * memory at the wrong time -- it runs much further ahead than
+        * the pipeline.
+        */
+       SSYNC();
 
-       flush_icache_range(fdata->start, fdata->end);
+       /* ipi_flaush_icache is invoked by generic flush_icache_range,
+        * so call blackfin arch icache flush directly here.
+        */
+       blackfin_icache_flush_range(fdata->start, fdata->end);
 }
 
 static void ipi_call_function(unsigned int cpu, struct ipi_message *msg)