[PATCH 1/7] powerpc/traps: Print unhandled signals in a separate function

Murilo Opsfelder Araujo
2018-07-24T19:28:03Z

Isolate the logic of printing unhandled signals out of _exception_pkey(). No
functional change, only code rearrangement.

Signed-off-by: Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
---
arch/powerpc/kernel/traps.c | 26 ++++++++++++++++----------
1 file changed, 16 insertions(+), 10 deletions(-)

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 0e17dcb48720..cbd3dc365193 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -301,26 +301,32 @@ void user_single_step_siginfo(struct task_struct *tsk,
info->si_addr = (void __user *)regs->nip;
}

+static void show_signal_msg(int signr, struct pt_regs *regs, int code,
+ unsigned long addr)
+{
+ const char fmt32[] = KERN_INFO "%s[%d]: unhandled signal %d " \
+ "at %08lx nip %08lx lr %08lx code %x\n";
+ 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);
+ }
+}

void _exception_pkey(int signr, struct pt_regs *regs, int code,
- unsigned long addr, int key)
+ unsigned long addr, int key)
{
siginfo_t info;
- const char fmt32[] = KERN_INFO "%s[%d]: unhandled signal %d " \
- "at %08lx nip %08lx lr %08lx code %x\n";
- const char fmt64[] = KERN_INFO "%s[%d]: unhandled signal %d " \
- "at %016lx nip %016lx lr %016lx code %x\n";

if (!user_mode(regs)) {
die("Exception in kernel mode", regs, signr);
return;
}

- 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);
- }
+ show_signal_msg(signr, regs, code, addr);

if (arch_irqs_disabled() && !arch_irq_disabled_regs(regs))
local_irq_enable();
--
2.17.1