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arm64: debug: remove noisy, pointless warning 

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 <sandeepa.prabhu@linaro.org>
Reported-by: Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Will Deacon 2014-04-17 12:37:14 +01:00 committed by Catalin Marinas
parent 2eb835e058
commit 43683afbcb
1 changed files with 0 additions and 3 deletions
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3
arch/arm64/kernel/debug-monitors.c
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@ -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;