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authorIngo Molnar <mingo@elte.hu>2005-12-20 11:54:17 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2005-12-20 10:47:55 -0800
commitbb44f116a14c4c932f15c79acfafd46bcb43ca9a (patch)
treed8f5dc090cef75f22e7ca152298096bb2877b6b8 /lib
parent391eadeec836463a4e6e3843953bbe40f6522593 (diff)
[PATCH] fix spinlock-debugging smp_processor_id() usage
When a spinlock debugging check hits, we print the CPU number as an informational thing - but there is no guarantee that preemption is off at that point - hence we should use raw_smp_processor_id(). Otherwise DEBUG_PREEMPT will print a warning. With this fix the warning goes away and only the spinlock-debugging info is printed. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/spinlock_debug.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/lib/spinlock_debug.c b/lib/spinlock_debug.c
index 906ad101eab3..dcd4be9bd4e5 100644
--- a/lib/spinlock_debug.c
+++ b/lib/spinlock_debug.c
@@ -20,7 +20,8 @@ static void spin_bug(spinlock_t *lock, const char *msg)
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);
+ msg, raw_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>",
@@ -78,8 +79,8 @@ static void __spin_lock_debug(spinlock_t *lock)
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);
+ raw_smp_processor_id(), current->comm,
+ current->pid, lock);
dump_stack();
}
}
@@ -120,7 +121,8 @@ static void rwlock_bug(rwlock_t *lock, const char *msg)
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);
+ raw_smp_processor_id(), current->comm,
+ current->pid, lock);
dump_stack();
#ifdef CONFIG_SMP
/*
@@ -148,8 +150,8 @@ static void __read_lock_debug(rwlock_t *lock)
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);
+ raw_smp_processor_id(), current->comm,
+ current->pid, lock);
dump_stack();
}
}
@@ -220,8 +222,8 @@ static void __write_lock_debug(rwlock_t *lock)
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);
+ raw_smp_processor_id(), current->comm,
+ current->pid, lock);
dump_stack();
}
}

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