Blackfin: clean up trace buffer handling when crashing

Avoid banging on the trace MMRs when debugging is disabled, avoid calling
the funcs multiple times in a row, disable the trace buffer earlier in the
exception handler to avoid eating more user entries, and dump the buffer
before calling the kgdb hook.  This way we maximize useful debugging info
up front rather than needing external tools (like gdb/serial/etc...).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/blackfin/cpu/cpu.h b/arch/blackfin/cpu/cpu.h
index 0a13c285e0..c8bec115a1 100644
--- a/arch/blackfin/cpu/cpu.h
+++ b/arch/blackfin/cpu/cpu.h
@@ -29,6 +29,7 @@
 
 void board_reset(void) __attribute__((__weak__));
 void bfin_reset_or_hang(void) __attribute__((__noreturn__));
+void bfin_dump(struct pt_regs *reg);
 void bfin_panic(struct pt_regs *reg);
 void dump(struct pt_regs *regs);