microblaze: Fix compilation failure because of release_thread

Warning log:
In file included from arch/microblaze/include/asm/thread_info.h:21:0,
                 from include/linux/thread_info.h:54,
                 from include/asm-generic/preempt.h:4,
                 from arch/microblaze/include/generated/asm/preempt.h:1,
                 from include/linux/preempt.h:18,
                 from include/linux/spinlock.h:50,
                 from include/linux/seqlock.h:35,
                 from include/linux/time.h:5,
                 from include/linux/stat.h:18,
                 from include/linux/sysfs.h:20,
                 from include/linux/kobject.h:21,
                 from include/linux/device.h:17,
                 from include/linux/node.h:17,
                 from include/linux/cpu.h:16,
                 from arch/microblaze/kernel/process.c:11:
arch/microblaze/include/asm/processor.h:125:20: warning: no previous prototype
for 'release_thread' [-Wmissing-prototypes]

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h
index d6e0ffea28b..9d31b057c35 100644
--- a/arch/microblaze/include/asm/processor.h
+++ b/arch/microblaze/include/asm/processor.h
@@ -122,7 +122,7 @@ struct thread_struct {
 }
 
 /* Free all resources held by a thread. */
-extern inline void release_thread(struct task_struct *dead_task)
+static inline void release_thread(struct task_struct *dead_task)
 {
 }