ARM: hw_breakpoint: make boot quieter without CPUID feature registers

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 pr_warn_once to keep the log
quieter.

Signed-off-by: Will Deacon <will.deacon@arm.com>

diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c
index 8cd52faeb77e0650dfb6dd1060281a8f33772306..983558eb90234acef1df7d4b9bec208e9fc89c1e 100644 (file)
--- a/arch/arm/kernel/hw_breakpoint.c
+++ b/arch/arm/kernel/hw_breakpoint.c
@@ -136,8 +136,8 @@ static u8 get_debug_arch(void)
 
        /* 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");
+               pr_warn_once("CPUID feature registers not supported. "
+                            "Assuming v6 debug is present.\n");
                return ARM_DEBUG_ARCH_V6;
        }