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Sun, 28 Oct 2018 06:10:32 -0700 (PDT) From: Changbin Du To: yamada.masahiro@socionext.com, michal.lkml@markovi.net, tglx@linutronix.de, mingo@redhat.com, linux@armlinux.org.uk, akpm@linux-foundation.org, gregkh@linuxfoundation.org Subject: [PATCH v3 3/4] ARM: mm: fix build error in fix_to_virt with CONFIG_CC_OPTIMIZE_FOR_DEBUGGING Date: Sun, 28 Oct 2018 13:09:44 +0000 Message-Id: <20181028130945.23581-4-changbin.du@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181028130945.23581-1-changbin.du@gmail.com> References: <20181028130945.23581-1-changbin.du@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181028_061039_437343_0D6372BB X-CRM114-Status: GOOD ( 13.14 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kbuild@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, rostedt@goodmis.org, linux-sparse@vger.kernel.org, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org, Changbin Du MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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 Acked-by: Steven Rostedt (VMware) --- 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 e46a6a446cdd..c08d74e76714 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 */