forked from luck/tmp_suning_uos_patched
d04213af90
Currently kdb_read_get_key() contains complex control flow that, on close inspection, turns out to be unnecessary. In particular: 1. It is impossible to enter the branch conditioned on (escape_delay == 1) except when the loop enters with (escape_delay == 2) allowing us to combine the branches. 2. Most of the code conditioned on (escape_delay == 2) simply modifies local data and then breaks out of the loop causing the function to return escape_data[0]. 3. Based on #2 there is not actually any need to ever explicitly set escape_delay to 2 because we it is much simpler to directly return escape_data[0] instead. 4. escape_data[0] is, for all but one exit path, known to be '\e'. Simplify the code based on these observations. There is a subtle (and harmless) change of behaviour resulting from this simplification: instead of letting the escape timeout after ~1998 milliseconds we now timeout after ~2000 milliseconds Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Link: https://lore.kernel.org/r/20191025073328.643-3-daniel.thompson@linaro.org |
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| .. | ||
| kdb | ||
| debug_core.c | ||
| debug_core.h | ||
| gdbstub.c | ||
| Makefile | ||