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powerpc/traps: Use an explicit ratelimit state for show_signal_msg() 

Replace printk_ratelimited() by printk() and a default rate limit
burst to limit displaying unhandled signals messages.

This will allow us to call print_vma_addr() in a future patch, which
does not work with printk_ratelimited().

Signed-off-by: Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Murilo Opsfelder Araujo 2018-08-01 18:33:16 -03:00 committed by Michael Ellerman
parent 658b0f92bc
commit 35a52a10c3
1 changed files with 16 additions and 5 deletions
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21
arch/powerpc/kernel/traps.c
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@ -301,6 +301,13 @@ void user_single_step_siginfo(struct task_struct *tsk,
info->si_addr = (void __user *)regs->nip;
}
static bool show_unhandled_signals_ratelimited(void)
{
static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL,
DEFAULT_RATELIMIT_BURST);
return show_unhandled_signals && __ratelimit(&rs);
}
static void show_signal_msg(int signr, struct pt_regs *regs, int code,
unsigned long addr)
{
@ -309,11 +316,15 @@ static void show_signal_msg(int signr, struct pt_regs *regs, int code,
const char fmt64[] = KERN_INFO "%s[%d]: unhandled signal %d " \
"at %016lx nip %016lx lr %016lx code %x\n";
if (show_unhandled_signals && unhandled_signal(current, signr)) {
printk_ratelimited(regs->msr & MSR_64BIT ? fmt64 : fmt32,
current->comm, current->pid, signr,
addr, regs->nip, regs->link, code);
}
if (!show_unhandled_signals_ratelimited())
return;
if (!unhandled_signal(current, signr))
return;
printk(regs->msr & MSR_64BIT ? fmt64 : fmt32,
current->comm, current->pid, signr,
addr, regs->nip, regs->link, code);
}
void _exception_pkey(int signr, struct pt_regs *regs, int code,