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powerpc/mm: Move debugger check to notify_page_fault() 

unclutters the main path

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Benjamin Herrenschmidt 2017-07-19 14:49:32 +10:00 committed by Michael Ellerman
parent f3d96e698e
commit bb4be50e61
1 changed files with 8 additions and 13 deletions
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21
arch/powerpc/mm/fault.c
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@ -47,27 +47,25 @@
#include "icswx.h"
#ifdef CONFIG_KPROBES
static inline int notify_page_fault(struct pt_regs *regs)
static inline bool notify_page_fault(struct pt_regs *regs)
{
int ret = 0;
bool ret = false;
#ifdef CONFIG_KPROBES
/* kprobe_running() needs smp_processor_id() */
if (!user_mode(regs)) {
preempt_disable();
if (kprobe_running() && kprobe_fault_handler(regs, 11))
ret = 1;
ret = true;
preempt_enable();
}
#endif /* CONFIG_KPROBES */
if (unlikely(debugger_fault_handler(regs)))
ret = true;
return ret;
}
#else
static inline int notify_page_fault(struct pt_regs *regs)
{
return 0;
}
#endif
/*
* Check whether the instruction at regs->nip is a store using
@ -242,9 +240,6 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
if (notify_page_fault(regs))
goto bail;
if (unlikely(debugger_fault_handler(regs)))
goto bail;
if (unlikely(page_fault_is_bad(error_code))) {
if (is_user)
_exception(SIGBUS, regs, BUS_OBJERR, address);