sandbox: fix the return type of os_free() function

The function os_free() returns nothing.
Its return type should be "void" rather than "void *".

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 725b505177d..2e2fc58a1ba 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -143,7 +143,7 @@ void *os_malloc(size_t length)
 	return hdr + 1;
 }
 
-void *os_free(void *ptr)
+void os_free(void *ptr)
 {
 	struct os_mem_hdr *hdr = ptr;