1 files changed, 21 insertions, 66 deletions

diff --git a/arch/x86/mm/mmio-mod.c b/arch/x86/mm/mmio-mod.c
index 635b50e8558..2c4baa88f2c 100644
--- a/arch/x86/mm/mmio-mod.c
+++ b/arch/x86/mm/mmio-mod.c
@@ -56,13 +56,6 @@ struct remap_trace {
 static DEFINE_PER_CPU(struct trap_reason, pf_reason);
 static DEFINE_PER_CPU(struct mmiotrace_rw, cpu_trace);
 
-#if 0 /* XXX: no way gather this info anymore */
-/* Access to this is not per-cpu. */
-static DEFINE_PER_CPU(atomic_t, dropped);
-#endif
-
-static struct dentry *marker_file;
-
 static DEFINE_MUTEX(mmiotrace_mutex);
 static DEFINE_SPINLOCK(trace_lock);
 static atomic_t mmiotrace_enabled;
@@ -75,7 +68,7 @@ static LIST_HEAD(trace_list);		/* struct remap_trace */
  *   and trace_lock.
  * - Routines depending on is_enabled() must take trace_lock.
  * - trace_list users must hold trace_lock.
- * - is_enabled() guarantees that mmio_trace_record is allowed.
+ * - is_enabled() guarantees that mmio_trace_{rw,mapping} are allowed.
  * - pre/post callbacks assume the effect of is_enabled() being true.
  */
 
@@ -97,44 +90,6 @@ static bool is_enabled(void)
         return atomic_read(&mmiotrace_enabled);
 }
 
-#if 0 /* XXX: needs rewrite */
-/*
- * Write callback for the debugfs entry:
- * Read a marker and write it to the mmio trace log
- */
-static ssize_t write_marker(struct file *file, const char __user *buffer,
-                                                size_t count, loff_t *ppos)
-{
-        char *event = NULL;
-        struct mm_io_header *headp;
-        ssize_t len = (count > 65535) ? 65535 : count;
-
-        event = kzalloc(sizeof(*headp) + len, GFP_KERNEL);
-        if (!event)
-                return -ENOMEM;
-
-        headp = (struct mm_io_header *)event;
-        headp->type = MMIO_MAGIC | (MMIO_MARKER << MMIO_OPCODE_SHIFT);
-        headp->data_len = len;
-
-        if (copy_from_user(event + sizeof(*headp), buffer, len)) {
-                kfree(event);
-                return -EFAULT;
-        }
-
-        spin_lock_irq(&trace_lock);
-#if 0 /* XXX: convert this to use tracing */
-        if (is_enabled())
-                relay_write(chan, event, sizeof(*headp) + len);
-        else
-#endif
-                len = -EINVAL;
-        spin_unlock_irq(&trace_lock);
-        kfree(event);
-        return len;
-}
-#endif
-
 static void print_pte(unsigned long address)
 {
         unsigned int level;
@@ -307,8 +262,10 @@ static void ioremap_trace_core(resource_size_t offset, unsigned long size,
         map.map_id = trace->id;
 
         spin_lock_irq(&trace_lock);
-        if (!is_enabled())
+        if (!is_enabled()) {
+                kfree(trace);
                 goto not_enabled;
+        }
 
         mmio_trace_mapping(&map);
         list_add_tail(&trace->list, &trace_list);
@@ -377,6 +334,23 @@ void mmiotrace_iounmap(volatile void __iomem *addr)
                 iounmap_trace_core(addr);
 }
 
+int mmiotrace_printk(const char *fmt, ...)
+{
+        int ret = 0;
+        va_list args;
+        unsigned long flags;
+        va_start(args, fmt);
+
+        spin_lock_irqsave(&trace_lock, flags);
+        if (is_enabled())
+                ret = mmio_trace_printk(fmt, args);
+        spin_unlock_irqrestore(&trace_lock, flags);
+
+        va_end(args);
+        return ret;
+}
+EXPORT_SYMBOL(mmiotrace_printk);
+
 static void clear_trace_list(void)
 {
         struct remap_trace *trace;
@@ -462,26 +436,12 @@ static void leave_uniprocessor(void)
 }
 #endif
 
-#if 0 /* XXX: out of order */
-static struct file_operations fops_marker = {
-        .owner =        THIS_MODULE,
-        .write =        write_marker
-};
-#endif
-
 void enable_mmiotrace(void)
 {
         mutex_lock(&mmiotrace_mutex);
         if (is_enabled())
                 goto out;
 
-#if 0 /* XXX: tracing does not support text entries */
-        marker_file = debugfs_create_file("marker", 0660, dir, NULL,
-                                                                &fops_marker);
-        if (!marker_file)
-                pr_err(NAME "marker file creation failed.\n");
-#endif
-
         if (nommiotrace)
                 pr_info(NAME "MMIO tracing disabled.\n");
         enter_uniprocessor();
@@ -506,11 +466,6 @@ void disable_mmiotrace(void)
 
         clear_trace_list(); /* guarantees: no more kmmio callbacks */
         leave_uniprocessor();
-        if (marker_file) {
-                debugfs_remove(marker_file);
-                marker_file = NULL;
-        }
-
         pr_info(NAME "disabled.\n");
 out:
         mutex_unlock(&mmiotrace_mutex);