From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752024AbeEFAbF (ORCPT ); Sat, 5 May 2018 20:31:05 -0400 Received: from mga03.intel.com ([134.134.136.65]:25684 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752005AbeEFAbA (ORCPT ); Sat, 5 May 2018 20:31:00 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,367,1520924400"; d="scan'208";a="226149391" From: changbin.du@intel.com To: yamada.masahiro@socionext.com, michal.lkml@markovi.net, tglx@linutronix.de, mingo@redhat.com, akpm@linux-foundation.org Cc: rostedt@goodmis.org, rdunlap@infradead.org, x86@kernel.org, lgirdwood@gmail.com, broonie@kernel.org, arnd@arndb.de, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Changbin Du Subject: [PATCH v3 5/5] asm-generic: fix build error in fix_to_virt with CONFIG_CC_OPTIMIZE_FOR_DEBUGGING Date: Sun, 6 May 2018 08:20:16 +0800 Message-Id: <1525566016-30172-6-git-send-email-changbin.du@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1525566016-30172-1-git-send-email-changbin.du@intel.com> References: <1525566016-30172-1-git-send-email-changbin.du@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Changbin Du With '-Og' optimization level, GCC would not optimize a count for a loop as a constant value. But BUILD_BUG_ON() only accept compile-time constant values. Let's use __fix_to_virt() to avoid the error. arch/arm/mm/mmu.o: In function `fix_to_virt': /home/changbin/work/linux/./include/asm-generic/fixmap.h:31: undefined reference to `__compiletime_assert_31' Makefile:1051: recipe for target 'vmlinux' failed make: *** [vmlinux] Error 1 Signed-off-by: Changbin Du --- v2: use __fix_to_virt() to fix the issue. --- arch/arm/mm/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index e46a6a4..c08d74e 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -1599,7 +1599,7 @@ static void __init early_fixmap_shutdown(void) pte_t *pte; struct map_desc map; - map.virtual = fix_to_virt(i); + map.virtual = __fix_to_virt(i); pte = pte_offset_early_fixmap(pmd_off_k(map.virtual), map.virtual); /* Only i/o device mappings are supported ATM */ -- 2.7.4