MIPS: Set trap_no field in thread_struct on exception.
This reverts commit 7281cd22973008a782860e48ed8d85d00204168c and adds
actual functionality to use the field.
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index 852a41c..4b88fa03 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -57,12 +57,10 @@
#ifdef CONFIG_KPROBES
/*
- * This is to notify the fault handler of the kprobes. The
- * exception code is redundant as it is also carried in REGS,
- * but we pass it anyhow.
+ * This is to notify the fault handler of the kprobes.
*/
if (notify_die(DIE_PAGE_FAULT, "page fault", regs, -1,
- (regs->cp0_cause >> 2) & 0x1f, SIGSEGV) == NOTIFY_STOP)
+ current->thread.trap_nr, SIGSEGV) == NOTIFY_STOP)
return;
#endif
@@ -224,6 +222,7 @@
print_vma_addr(" ", regs->regs[31]);
pr_info("\n");
}
+ current->thread.trap_nr = (regs->cp0_cause >> 2) & 0x1f;
info.si_signo = SIGSEGV;
info.si_errno = 0;
/* info.si_code has been set above */
@@ -282,6 +281,7 @@
field, (unsigned long) regs->cp0_epc,
field, (unsigned long) regs->regs[31]);
#endif
+ current->thread.trap_nr = (regs->cp0_cause >> 2) & 0x1f;
tsk->thread.cp0_badvaddr = address;
info.si_signo = SIGBUS;
info.si_errno = 0;