Change in coreboot[master]: Revert "x86/smp/spinlock: Disable thread coop when taking spinlock"

[Raul Rangel (Code Review)]

Raul Rangel has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/59547 )

Change subject: Revert "x86/smp/spinlock: Disable thread coop when taking spinlock"
......................................................................

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

This reverts commit a98d302fe9dcce13a1c60b4bdfaf2e713fd11b51.

No longer required since each spin_lock() invocation now calls
thread_coop_disable before grabbing the lock.

BUG=b:179699789
TEST=Boot guybrush to OS

Signed-off-by: Raul E Rangel 
Change-Id: Icf61fb43a427f6f6bb3640a770ab0bf0e760f690
---
M src/arch/x86/include/arch/smp/spinlock.h
1 file changed, 0 insertions(+), 8 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/47/59547/1

diff --git a/src/arch/x86/include/arch/smp/spinlock.h b/src/arch/x86/include/arch/smp/spinlock.h
index c7008c1..f8fffdb 100644
--- a/src/arch/x86/include/arch/smp/spinlock.h
+++ b/src/arch/x86/include/arch/smp/spinlock.h
@@ -3,8 +3,6 @@
 #ifndef ARCH_SMP_SPINLOCK_H
 #define ARCH_SMP_SPINLOCK_H

-#include <thread.h>
-
 /*
  * Your basic SMP spinlocks, allowing only a single CPU anywhere
  */
@@ -52,16 +50,10 @@
    __asm__ __volatile__(
    	spin_lock_string
    	: "=m" (lock->lock) : : "memory");
-
-	/* Switching contexts while holding a spinlock will lead to deadlocks */
-	thread_coop_disable();
-
 }

static __always_inline void spin_unlock(spinlock_t *lock)
 {
-	thread_coop_enable();
-
    __asm__ __volatile__(
    	spin_unlock_string
    	: "=m" (lock->lock) : : "memory");