Fix battery_bench bug by using a static buffer for stack

Since battery_bench is a TSR (terminate & stay resident) plugin it
cannot allocate the plugin buffer -- various parts of the Rockbox
core make use of it as temporary storage space. The buffer was used
for stack space so this generated false 'Stkov' panics when one of
those in-core users overwrote the buffer.

The default stack size of 1kb is a bit small, so use 4x the default
size to be on the safe side.

This also fixes a minor issue where trying to view OS stack usage
while battery_bench was running would cause audio dropouts, due to
scanning the possibly huge stack with IRQs disabled.

Change-Id: I2e6b76f9946db9090c1af61f7aa0a0dac0698c20

0 files changed, 0 insertions, 0 deletions