At the beginning of setup_64.c, it has,
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif
where DBG() could be compiled away, and generate warnings,
arch/powerpc/kernel/setup_64.c: In function 'initialize_cache_info':
arch/powerpc/kernel/setup_64.c:579:49: warning: suggest braces around
empty body in an 'if' statement [-Wempty-body]
DBG("Argh, can't find dcache properties !\n");
^
arch/powerpc/kernel/setup_64.c:582:49: warning: suggest braces around
empty body in an 'if' statement [-Wempty-body]
DBG("Argh, can't find icache properties !\n");
Suggested-by: Tyrel Datwyler <tyr...@linux.vnet.ibm.com>
Signed-off-by: Qian Cai <c...@lca.pw>
---
v2: fix it by using a NOP while loop.
arch/powerpc/kernel/setup_64.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 44b4c432a273..bed4ae8d338c 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -71,7 +71,7 @@
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
-#define DBG(fmt...)
+#define DBG(fmt...) do { } while (0)
#endif
int spinning_secondaries;
--
1.8.3.1
