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-rw-r--r--kernel/debug/gdbstub.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c
index c22d8c28ad8..5a155742ae9 100644
--- a/kernel/debug/gdbstub.c
+++ b/kernel/debug/gdbstub.c
@@ -1129,5 +1129,6 @@ void gdbstub_exit(int status)
dbg_io_ops->write_char(hex_asc_lo(checksum));
/* make sure the output is flushed, lest the bootloader clobber it */
- dbg_io_ops->flush();
+ if (dbg_io_ops->flush)
+ dbg_io_ops->flush();
}