powerpc/traps: add NOKPROBE_SYMBOL for sreset and mce

These NMIs could fire any time including inside kprobe code, so
exclude them from kprobes.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210130130852.2952424-19-npiggin@gmail.com

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index f737014..4349b25 100644 (file)
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -517,6 +517,7 @@ out:
 
        /* What should we do here? We could issue a shutdown or hard reset. */
 }
+NOKPROBE_SYMBOL(system_reset_exception);
 
 /*
  * I/O accesses can cause machine checks on powermacs.
@@ -843,6 +844,7 @@ void machine_check_exception(struct pt_regs *regs)
 bail:
        if (nmi) nmi_exit();
 }
+NOKPROBE_SYMBOL(machine_check_exception);
 
 void SMIException(struct pt_regs *regs)
 {