linux-kernel - [PATCH] powerpc/setup_64: fix -Wempty-body warnings

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Date:   Wed,  5 Jun 2019 16:17:55 -0400
From:   Qian Cai <cai@....pw>
To:     mpe@...erman.id.au
Cc:     paulus@...ba.org, benh@...nel.crashing.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Qian Cai <cai@....pw>
Subject: [PATCH] powerpc/setup_64: fix -Wempty-body warnings

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");

Signed-off-by: Qian Cai <cai@....pw>
---
 arch/powerpc/kernel/setup_64.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 44b4c432a273..23758834324f 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -575,12 +575,13 @@ void __init initialize_cache_info(void)
 	 * d-cache and i-cache sizes... -Peter
 	 */
 	if (cpu) {
-		if (!parse_cache_info(cpu, false, &ppc64_caches.l1d))
+		/* Add an extra brace to silence -Wempty-body warnings. */
+		if (!parse_cache_info(cpu, false, &ppc64_caches.l1d)) {
 			DBG("Argh, can't find dcache properties !\n");
-
-		if (!parse_cache_info(cpu, true, &ppc64_caches.l1i))
+		}
+		if (!parse_cache_info(cpu, true, &ppc64_caches.l1i)) {
 			DBG("Argh, can't find icache properties !\n");
-
+		}
 		/*
 		 * Try to find the L2 and L3 if any. Assume they are
 		 * unified and use the D-side properties.
-- 
1.8.3.1