arm64: debug: remove noisy, pointless warning

wildea01 · ctmarinas · commit 43683afbcb32 · 2014-04-25T16:46:50.000+01:00
Sending a SIGTRAP to a user task after execution of a BRK instruction at
EL0 is fundamental to the way in which software breakpoints work and
doesn't deserve a warning to be logged in dmesg. Whilst the warning can
be justified from EL1, do_debug_exception will already do the right thing,
so simply remove the code altogether.

Cc: Sandeepa Prabhu &lt;sandeepa.prabhu@linaro.org&gt;
Reported-by: Kyrylo Tkachov &lt;kyrylo.tkachov@arm.com&gt;
Signed-off-by: Will Deacon &lt;will.deacon@arm.com&gt;
Signed-off-by: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c
@@ -318,9 +318,6 @@ static int brk_handler(unsigned long addr, unsigned int esr,
 	if (call_break_hook(regs, esr) == DBG_HOOK_HANDLED)
 		return 0;
 
-	pr_warn("unexpected brk exception at %lx, esr=0x%x\n",
-			(long)instruction_pointer(regs), esr);
-
 	if (!user_mode(regs))
 		return -EFAULT;
 
