From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Wed, 17 Oct 2012 16:31:39 +0100 Subject: [PATCH 5/7] ARM: hw_breakpoint: make boot quieter without CPUID feature registers In-Reply-To: <1350487901-3108-1-git-send-email-will.deacon@arm.com> References: <1350487901-3108-1-git-send-email-will.deacon@arm.com> Message-ID: <1350487901-3108-6-git-send-email-will.deacon@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Booting on a v6 core without the CPUID feature registers (e.g. 1136) leads to a noisy dmesg complaining about their absence. This patch changes the pr_warning into a WARN_ONCE to keep the log quieter. Signed-off-by: Will Deacon --- arch/arm/kernel/hw_breakpoint.c | 7 +++---- 1 files changed, 3 insertions(+), 4 deletions(-) diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c index b6f4aec..f267120 100644 --- a/arch/arm/kernel/hw_breakpoint.c +++ b/arch/arm/kernel/hw_breakpoint.c @@ -135,11 +135,10 @@ static u8 get_debug_arch(void) u32 didr; /* Do we implement the extended CPUID interface? */ - if (((read_cpuid_id() >> 16) & 0xf) != 0xf) { - pr_warning("CPUID feature registers not supported. " - "Assuming v6 debug is present.\n"); + if (WARN_ONCE(((read_cpuid_id() >> 16) & 0xf) != 0xf, + "CPUID feature registers not supported. " + "Assuming v6 debug is present.\n")) return ARM_DEBUG_ARCH_V6; - } ARM_DBG_READ(c0, 0, didr); return (didr >> 16) & 0xf; -- 1.7.4.1