From: Arnd Bergmann <arnd@arndb.de> To: Andrew Morton <akpm@linux-foundation.org> Cc: kernel-build-reports@lists.linaro.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven <geert@linux-m68k.org>, Arnd Bergmann <arnd@arndb.de> Subject: [PATCH 3/3] test/hash: Fix warning in preprocessor symbol evaluation Date: Mon, 29 Aug 2016 23:49:52 +0200 Message-ID: <20160829214952.1334674-4-arnd@arndb.de> (raw) In-Reply-To: <20160829214952.1334674-1-arnd@arndb.de> From: Geert Uytterhoeven <geert@linux-m68k.org> Some versions of gcc don't like tests for the value of an undefined preprocessor symbol, even in the #else branch of an #ifndef: lib/test_hash.c:224:7: warning: "HAVE_ARCH__HASH_32" is not defined [-Wundef] #elif HAVE_ARCH__HASH_32 != 1 ^ lib/test_hash.c:229:7: warning: "HAVE_ARCH_HASH_32" is not defined [-Wundef] #elif HAVE_ARCH_HASH_32 != 1 ^ lib/test_hash.c:234:7: warning: "HAVE_ARCH_HASH_64" is not defined [-Wundef] #elif HAVE_ARCH_HASH_64 != 1 ^ Seen with gcc 4.9, not seen with 4.1.2. Change the logic to only check the value inside an #ifdef to fix this. Fixes: 468a9428521e7d00 ("<linux/hash.h>: Add support for architecture-specific functions") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: George Spelvin <linux@sciencehorizons.net> Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- lib/test_hash.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git a/lib/test_hash.c b/lib/test_hash.c index 81702ee4c41c..cac20c5fb304 100644 --- a/lib/test_hash.c +++ b/lib/test_hash.c @@ -219,21 +219,27 @@ test_hash_init(void) } /* Issue notices about skipped tests. */ -#ifndef HAVE_ARCH__HASH_32 - pr_info("__hash_32() has no arch implementation to test."); -#elif HAVE_ARCH__HASH_32 != 1 +#ifdef HAVE_ARCH__HASH_32 +#if HAVE_ARCH__HASH_32 != 1 pr_info("__hash_32() is arch-specific; not compared to generic."); #endif -#ifndef HAVE_ARCH_HASH_32 - pr_info("hash_32() has no arch implementation to test."); -#elif HAVE_ARCH_HASH_32 != 1 +#else + pr_info("__hash_32() has no arch implementation to test."); +#endif +#ifdef HAVE_ARCH_HASH_32 +#if HAVE_ARCH_HASH_32 != 1 pr_info("hash_32() is arch-specific; not compared to generic."); #endif -#ifndef HAVE_ARCH_HASH_64 - pr_info("hash_64() has no arch implementation to test."); -#elif HAVE_ARCH_HASH_64 != 1 +#else + pr_info("hash_32() has no arch implementation to test."); +#endif +#ifdef HAVE_ARCH_HASH_64 +#if HAVE_ARCH_HASH_64 != 1 pr_info("hash_64() is arch-specific; not compared to generic."); #endif +#else + pr_info("hash_64() has no arch implementation to test."); +#endif pr_notice("%u tests passed.", tests); -- 2.9.0
prev parent reply index Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-08-29 21:49 [PATCH 0/3] v4.8 remaining ARM warning fixes Arnd Bergmann 2016-08-29 21:49 ` [PATCH 1/3] kconfig: tinyconfig: provide whole choice blocks to avoid warnings Arnd Bergmann 2016-08-29 21:49 ` [PATCH 2/3] test/hash: Fix warning in two-dimensional array init Arnd Bergmann 2016-08-29 21:49 ` Arnd Bergmann [this message]
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