Merge branch 'linus' into stackprotector

Conflicts:
	arch/x86/kernel/Makefile
	include/asm-x86/pda.h

1 files changed, 32 insertions, 35 deletions

diff --git a/kernel/marker.c b/kernel/marker.c
index b5a9fe1d50d5..7d1faecd7a51 100644
--- a/kernel/marker.c
+++ b/kernel/marker.c
@@ -55,8 +55,8 @@ static DEFINE_MUTEX(markers_mutex);
 struct marker_entry {
         struct hlist_node hlist;
         char *format;
-        void (*call)(const struct marker *mdata,        /* Probe wrapper */
-                void *call_private, const char *fmt, ...);
+                        /* Probe wrapper */
+        void (*call)(const struct marker *mdata, void *call_private, ...);
         struct marker_probe_closure single;
         struct marker_probe_closure *multi;
         int refcount;   /* Number of times armed. 0 if disarmed. */
@@ -91,15 +91,13 @@ EXPORT_SYMBOL_GPL(__mark_empty_function);
  * marker_probe_cb Callback that prepares the variable argument list for probes.
  * @mdata: pointer of type struct marker
  * @call_private: caller site private data
- * @fmt: format string
  * @...:  Variable argument list.
  *
  * Since we do not use "typical" pointer based RCU in the 1 argument case, we
  * need to put a full smp_rmb() in this branch. This is why we do not use
  * rcu_dereference() for the pointer read.
  */
-void marker_probe_cb(const struct marker *mdata, void *call_private,
-        const char *fmt, ...)
+void marker_probe_cb(const struct marker *mdata, void *call_private, ...)
 {
         va_list args;
         char ptype;
@@ -120,13 +118,19 @@ void marker_probe_cb(const struct marker *mdata, void *call_private,
                 /* Must read the ptr before private data. They are not data
                  * dependant, so we put an explicit smp_rmb() here. */
                 smp_rmb();
-                va_start(args, fmt);
-                func(mdata->single.probe_private, call_private, fmt, &args);
+                va_start(args, call_private);
+                func(mdata->single.probe_private, call_private, mdata->format,
+                        &args);
                 va_end(args);
         } else {
                 struct marker_probe_closure *multi;
                 int i;
                 /*
+                 * Read mdata->ptype before mdata->multi.
+                 */
+                smp_rmb();
+                multi = mdata->multi;
+                /*
                  * multi points to an array, therefore accessing the array
                  * depends on reading multi. However, even in this case,
                  * we must insure that the pointer is read _before_ the array
@@ -134,11 +138,10 @@ void marker_probe_cb(const struct marker *mdata, void *call_private,
                  * in the fast path, so put the explicit barrier here.
                  */
                 smp_read_barrier_depends();
-                multi = mdata->multi;
                 for (i = 0; multi[i].func; i++) {
-                        va_start(args, fmt);
-                        multi[i].func(multi[i].probe_private, call_private, fmt,
-                                &args);
+                        va_start(args, call_private);
+                        multi[i].func(multi[i].probe_private, call_private,
+                                mdata->format, &args);
                         va_end(args);
                 }
         }
@@ -150,13 +153,11 @@ EXPORT_SYMBOL_GPL(marker_probe_cb);
  * marker_probe_cb Callback that does not prepare the variable argument list.
  * @mdata: pointer of type struct marker
  * @call_private: caller site private data
- * @fmt: format string
  * @...:  Variable argument list.
  *
  * Should be connected to markers "MARK_NOARGS".
  */
-void marker_probe_cb_noarg(const struct marker *mdata,
-        void *call_private, const char *fmt, ...)
+void marker_probe_cb_noarg(const struct marker *mdata, void *call_private, ...)
 {
         va_list args;   /* not initialized */
         char ptype;
@@ -172,11 +173,17 @@ void marker_probe_cb_noarg(const struct marker *mdata,
                 /* Must read the ptr before private data. They are not data
                  * dependant, so we put an explicit smp_rmb() here. */
                 smp_rmb();
-                func(mdata->single.probe_private, call_private, fmt, &args);
+                func(mdata->single.probe_private, call_private, mdata->format,
+                        &args);
         } else {
                 struct marker_probe_closure *multi;
                 int i;
                 /*
+                 * Read mdata->ptype before mdata->multi.
+                 */
+                smp_rmb();
+                multi = mdata->multi;
+                /*
                  * multi points to an array, therefore accessing the array
                  * depends on reading multi. However, even in this case,
                  * we must insure that the pointer is read _before_ the array
@@ -184,10 +191,9 @@ void marker_probe_cb_noarg(const struct marker *mdata,
                  * in the fast path, so put the explicit barrier here.
                  */
                 smp_read_barrier_depends();
-                multi = mdata->multi;
                 for (i = 0; multi[i].func; i++)
-                        multi[i].func(multi[i].probe_private, call_private, fmt,
-                                &args);
+                        multi[i].func(multi[i].probe_private, call_private,
+                                mdata->format, &args);
         }
         preempt_enable();
 }
@@ -443,7 +449,7 @@ static int remove_marker(const char *name)
         hlist_del(&e->hlist);
         /* Make sure the call_rcu has been executed */
         if (e->rcu_pending)
-                rcu_barrier();
+                rcu_barrier_sched();
         kfree(e);
         return 0;
 }
@@ -478,7 +484,7 @@ static int marker_set_format(struct marker_entry **entry, const char *format)
         hlist_del(&(*entry)->hlist);
         /* Make sure the call_rcu has been executed */
         if ((*entry)->rcu_pending)
-                rcu_barrier();
+                rcu_barrier_sched();
         kfree(*entry);
         *entry = e;
         trace_mark(core_marker_format, "name %s format %s",
@@ -657,7 +663,7 @@ int marker_probe_register(const char *name, const char *format,
          * make sure it's executed now.
          */
         if (entry->rcu_pending)
-                rcu_barrier();
+                rcu_barrier_sched();
         old = marker_entry_add_probe(entry, probe, probe_private);
         if (IS_ERR(old)) {
                 ret = PTR_ERR(old);
@@ -672,10 +678,7 @@ int marker_probe_register(const char *name, const char *format,
         entry->rcu_pending = 1;
         /* write rcu_pending before calling the RCU callback */
         smp_wmb();
-#ifdef CONFIG_PREEMPT_RCU
-        synchronize_sched();    /* Until we have the call_rcu_sched() */
-#endif
-        call_rcu(&entry->rcu, free_old_closure);
+        call_rcu_sched(&entry->rcu, free_old_closure);
 end:
         mutex_unlock(&markers_mutex);
         return ret;
@@ -706,7 +709,7 @@ int marker_probe_unregister(const char *name,
         if (!entry)
                 goto end;
         if (entry->rcu_pending)
-                rcu_barrier();
+                rcu_barrier_sched();
         old = marker_entry_remove_probe(entry, probe, probe_private);
         mutex_unlock(&markers_mutex);
         marker_update_probes();         /* may update entry */
@@ -718,10 +721,7 @@ int marker_probe_unregister(const char *name,
         entry->rcu_pending = 1;
         /* write rcu_pending before calling the RCU callback */
         smp_wmb();
-#ifdef CONFIG_PREEMPT_RCU
-        synchronize_sched();    /* Until we have the call_rcu_sched() */
-#endif
-        call_rcu(&entry->rcu, free_old_closure);
+        call_rcu_sched(&entry->rcu, free_old_closure);
         remove_marker(name);    /* Ignore busy error message */
         ret = 0;
 end:
@@ -788,7 +788,7 @@ int marker_probe_unregister_private_data(marker_probe_func *probe,
                 goto end;
         }
         if (entry->rcu_pending)
-                rcu_barrier();
+                rcu_barrier_sched();
         old = marker_entry_remove_probe(entry, NULL, probe_private);
         mutex_unlock(&markers_mutex);
         marker_update_probes();         /* may update entry */
@@ -799,10 +799,7 @@ int marker_probe_unregister_private_data(marker_probe_func *probe,
         entry->rcu_pending = 1;
         /* write rcu_pending before calling the RCU callback */
         smp_wmb();
-#ifdef CONFIG_PREEMPT_RCU
-        synchronize_sched();    /* Until we have the call_rcu_sched() */
-#endif
-        call_rcu(&entry->rcu, free_old_closure);
+        call_rcu_sched(&entry->rcu, free_old_closure);
         remove_marker(entry->name);     /* Ignore busy error message */
 end:
         mutex_unlock(&markers_mutex);