smp: Move __smp_call_function_single() below its safe version

Move this function closer to __smp_call_function_single(). These functions
have very similar behavior and should be displayed in the same block
for clarity.

Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@fb.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/kernel/smp.c b/kernel/smp.c
index 64bb0d4..fa04ab9 100644 (file)
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -237,6 +237,38 @@ int smp_call_function_single(int cpu, smp_call_func_t func, void *info,
 }
 EXPORT_SYMBOL(smp_call_function_single);
 
+/**
+ * __smp_call_function_single(): Run a function on a specific CPU
+ * @cpu: The CPU to run on.
+ * @csd: Pre-allocated and setup data structure
+ * @wait: If true, wait until function has completed on specified CPU.
+ *
+ * Like smp_call_function_single(), but allow caller to pass in a
+ * pre-allocated data structure. Useful for embedding @data inside
+ * other structures, for instance.
+ */
+int __smp_call_function_single(int cpu, struct call_single_data *csd, int wait)
+{
+       int err = 0;
+       int this_cpu;
+
+       this_cpu = get_cpu();
+       /*
+        * Can deadlock when called with interrupts disabled.
+        * We allow cpu's that are not yet online though, as no one else can
+        * send smp call function interrupt to this cpu and as such deadlocks
+        * can't happen.
+        */
+       WARN_ON_ONCE(cpu_online(this_cpu) && wait && irqs_disabled()
+                    && !oops_in_progress);
+
+       err = generic_exec_single(cpu, csd, csd->func, csd->info, wait);
+       put_cpu();
+
+       return err;
+}
+EXPORT_SYMBOL_GPL(__smp_call_function_single);
+
 /*
  * smp_call_function_any - Run a function on any of the given cpus
  * @mask: The mask of cpus it can run on.
@@ -280,38 +312,6 @@ call:
 }
 EXPORT_SYMBOL_GPL(smp_call_function_any);
 
-/**
- * __smp_call_function_single(): Run a function on a specific CPU
- * @cpu: The CPU to run on.
- * @csd: Pre-allocated and setup data structure
- * @wait: If true, wait until function has completed on specified CPU.
- *
- * Like smp_call_function_single(), but allow caller to pass in a
- * pre-allocated data structure. Useful for embedding @data inside
- * other structures, for instance.
- */
-int __smp_call_function_single(int cpu, struct call_single_data *csd, int wait)
-{
-       int err = 0;
-       int this_cpu;
-
-       this_cpu = get_cpu();
-       /*
-        * Can deadlock when called with interrupts disabled.
-        * We allow cpu's that are not yet online though, as no one else can
-        * send smp call function interrupt to this cpu and as such deadlocks
-        * can't happen.
-        */
-       WARN_ON_ONCE(cpu_online(this_cpu) && wait && irqs_disabled()
-                    && !oops_in_progress);
-
-       err = generic_exec_single(cpu, csd, csd->func, csd->info, wait);
-       put_cpu();
-
-       return err;
-}
-EXPORT_SYMBOL_GPL(__smp_call_function_single);
-
 /**
  * smp_call_function_many(): Run a function on a set of other CPUs.
  * @mask: The set of cpus to run on (only runs on online subset).