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-rw-r--r--lib/spinlock_debug.c257
1 files changed, 0 insertions, 257 deletions
diff --git a/lib/spinlock_debug.c b/lib/spinlock_debug.c
deleted file mode 100644
index 906ad101eab..00000000000
--- a/lib/spinlock_debug.c
+++ /dev/null
@@ -1,257 +0,0 @@
-/*
- * Copyright 2005, Red Hat, Inc., Ingo Molnar
- * Released under the General Public License (GPL).
- *
- * This file contains the spinlock/rwlock implementations for
- * DEBUG_SPINLOCK.
- */
-
-#include <linux/config.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-
-static void spin_bug(spinlock_t *lock, const char *msg)
-{
- static long print_once = 1;
- struct task_struct *owner = NULL;
-
- if (xchg(&print_once, 0)) {
- if (lock->owner && lock->owner != SPINLOCK_OWNER_INIT)
- owner = lock->owner;
- printk("BUG: spinlock %s on CPU#%d, %s/%d\n",
- msg, smp_processor_id(), current->comm, current->pid);
- printk(" lock: %p, .magic: %08x, .owner: %s/%d, .owner_cpu: %d\n",
- lock, lock->magic,
- owner ? owner->comm : "<none>",
- owner ? owner->pid : -1,
- lock->owner_cpu);
- dump_stack();
-#ifdef CONFIG_SMP
- /*
- * We cannot continue on SMP:
- */
-// panic("bad locking");
-#endif
- }
-}
-
-#define SPIN_BUG_ON(cond, lock, msg) if (unlikely(cond)) spin_bug(lock, msg)
-
-static inline void debug_spin_lock_before(spinlock_t *lock)
-{
- SPIN_BUG_ON(lock->magic != SPINLOCK_MAGIC, lock, "bad magic");
- SPIN_BUG_ON(lock->owner == current, lock, "recursion");
- SPIN_BUG_ON(lock->owner_cpu == raw_smp_processor_id(),
- lock, "cpu recursion");
-}
-
-static inline void debug_spin_lock_after(spinlock_t *lock)
-{
- lock->owner_cpu = raw_smp_processor_id();
- lock->owner = current;
-}
-
-static inline void debug_spin_unlock(spinlock_t *lock)
-{
- SPIN_BUG_ON(lock->magic != SPINLOCK_MAGIC, lock, "bad magic");
- SPIN_BUG_ON(!spin_is_locked(lock), lock, "already unlocked");
- SPIN_BUG_ON(lock->owner != current, lock, "wrong owner");
- SPIN_BUG_ON(lock->owner_cpu != raw_smp_processor_id(),
- lock, "wrong CPU");
- lock->owner = SPINLOCK_OWNER_INIT;
- lock->owner_cpu = -1;
-}
-
-static void __spin_lock_debug(spinlock_t *lock)
-{
- int print_once = 1;
- u64 i;
-
- for (;;) {
- for (i = 0; i < loops_per_jiffy * HZ; i++) {
- cpu_relax();
- if (__raw_spin_trylock(&lock->raw_lock))
- return;
- }
- /* lockup suspected: */
- if (print_once) {
- print_once = 0;
- printk("BUG: spinlock lockup on CPU#%d, %s/%d, %p\n",
- smp_processor_id(), current->comm, current->pid,
- lock);
- dump_stack();
- }
- }
-}
-
-void _raw_spin_lock(spinlock_t *lock)
-{
- debug_spin_lock_before(lock);
- if (unlikely(!__raw_spin_trylock(&lock->raw_lock)))
- __spin_lock_debug(lock);
- debug_spin_lock_after(lock);
-}
-
-int _raw_spin_trylock(spinlock_t *lock)
-{
- int ret = __raw_spin_trylock(&lock->raw_lock);
-
- if (ret)
- debug_spin_lock_after(lock);
-#ifndef CONFIG_SMP
- /*
- * Must not happen on UP:
- */
- SPIN_BUG_ON(!ret, lock, "trylock failure on UP");
-#endif
- return ret;
-}
-
-void _raw_spin_unlock(spinlock_t *lock)
-{
- debug_spin_unlock(lock);
- __raw_spin_unlock(&lock->raw_lock);
-}
-
-static void rwlock_bug(rwlock_t *lock, const char *msg)
-{
- static long print_once = 1;
-
- if (xchg(&print_once, 0)) {
- printk("BUG: rwlock %s on CPU#%d, %s/%d, %p\n", msg,
- smp_processor_id(), current->comm, current->pid, lock);
- dump_stack();
-#ifdef CONFIG_SMP
- /*
- * We cannot continue on SMP:
- */
- panic("bad locking");
-#endif
- }
-}
-
-#define RWLOCK_BUG_ON(cond, lock, msg) if (unlikely(cond)) rwlock_bug(lock, msg)
-
-static void __read_lock_debug(rwlock_t *lock)
-{
- int print_once = 1;
- u64 i;
-
- for (;;) {
- for (i = 0; i < loops_per_jiffy * HZ; i++) {
- cpu_relax();
- if (__raw_read_trylock(&lock->raw_lock))
- return;
- }
- /* lockup suspected: */
- if (print_once) {
- print_once = 0;
- printk("BUG: read-lock lockup on CPU#%d, %s/%d, %p\n",
- smp_processor_id(), current->comm, current->pid,
- lock);
- dump_stack();
- }
- }
-}
-
-void _raw_read_lock(rwlock_t *lock)
-{
- RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");
- if (unlikely(!__raw_read_trylock(&lock->raw_lock)))
- __read_lock_debug(lock);
-}
-
-int _raw_read_trylock(rwlock_t *lock)
-{
- int ret = __raw_read_trylock(&lock->raw_lock);
-
-#ifndef CONFIG_SMP
- /*
- * Must not happen on UP:
- */
- RWLOCK_BUG_ON(!ret, lock, "trylock failure on UP");
-#endif
- return ret;
-}
-
-void _raw_read_unlock(rwlock_t *lock)
-{
- RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");
- __raw_read_unlock(&lock->raw_lock);
-}
-
-static inline void debug_write_lock_before(rwlock_t *lock)
-{
- RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");
- RWLOCK_BUG_ON(lock->owner == current, lock, "recursion");
- RWLOCK_BUG_ON(lock->owner_cpu == raw_smp_processor_id(),
- lock, "cpu recursion");
-}
-
-static inline void debug_write_lock_after(rwlock_t *lock)
-{
- lock->owner_cpu = raw_smp_processor_id();
- lock->owner = current;
-}
-
-static inline void debug_write_unlock(rwlock_t *lock)
-{
- RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");
- RWLOCK_BUG_ON(lock->owner != current, lock, "wrong owner");
- RWLOCK_BUG_ON(lock->owner_cpu != raw_smp_processor_id(),
- lock, "wrong CPU");
- lock->owner = SPINLOCK_OWNER_INIT;
- lock->owner_cpu = -1;
-}
-
-static void __write_lock_debug(rwlock_t *lock)
-{
- int print_once = 1;
- u64 i;
-
- for (;;) {
- for (i = 0; i < loops_per_jiffy * HZ; i++) {
- cpu_relax();
- if (__raw_write_trylock(&lock->raw_lock))
- return;
- }
- /* lockup suspected: */
- if (print_once) {
- print_once = 0;
- printk("BUG: write-lock lockup on CPU#%d, %s/%d, %p\n",
- smp_processor_id(), current->comm, current->pid,
- lock);
- dump_stack();
- }
- }
-}
-
-void _raw_write_lock(rwlock_t *lock)
-{
- debug_write_lock_before(lock);
- if (unlikely(!__raw_write_trylock(&lock->raw_lock)))
- __write_lock_debug(lock);
- debug_write_lock_after(lock);
-}
-
-int _raw_write_trylock(rwlock_t *lock)
-{
- int ret = __raw_write_trylock(&lock->raw_lock);
-
- if (ret)
- debug_write_lock_after(lock);
-#ifndef CONFIG_SMP
- /*
- * Must not happen on UP:
- */
- RWLOCK_BUG_ON(!ret, lock, "trylock failure on UP");
-#endif
- return ret;
-}
-
-void _raw_write_unlock(rwlock_t *lock)
-{
- debug_write_unlock(lock);
- __raw_write_unlock(&lock->raw_lock);
-}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 04:05:46 +0000