x86/smp/spinlock: Disable thread coop when taking spinlock

Switching threads while holding a spinlock can lead to a deadlock. This
happens if you have two thread trying to print to the serial console
because the uart code uses udelay.

BUG=b:179699789
TEST=Boot guybrush and no longer see a deadlock when printing to
console from a second thread.

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I1b929070b7f175965d4f37be693462fef26be052
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56320
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>

0 files changed, 0 insertions, 0 deletions