[PATCH] work around ppc64 bootup bug by making mutex-debugging save/restore irqs
It seems ppc64 wants to lock mutexes in early bootup code, with interrupts
disabled, and they expect interrupts to stay disabled, else they crash.
Work around this bug by making mutex debugging variants save/restore irq
flags.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/kernel/mutex-debug.c b/kernel/mutex-debug.c
index f4913c3..036b628 100644
--- a/kernel/mutex-debug.c
+++ b/kernel/mutex-debug.c
@@ -153,13 +153,13 @@
continue;
count++;
cursor = curr->next;
- debug_spin_lock_restore(&debug_mutex_lock, flags);
+ debug_spin_unlock_restore(&debug_mutex_lock, flags);
printk("\n#%03d: ", count);
printk_lock(lock, filter ? 0 : 1);
goto next;
}
- debug_spin_lock_restore(&debug_mutex_lock, flags);
+ debug_spin_unlock_restore(&debug_mutex_lock, flags);
printk("\n");
}
@@ -316,7 +316,7 @@
continue;
list_del_init(curr);
DEBUG_OFF();
- debug_spin_lock_restore(&debug_mutex_lock, flags);
+ debug_spin_unlock_restore(&debug_mutex_lock, flags);
printk("BUG: %s/%d, lock held at task exit time!\n",
task->comm, task->pid);
@@ -325,7 +325,7 @@
printk("exiting task is not even the owner??\n");
return;
}
- debug_spin_lock_restore(&debug_mutex_lock, flags);
+ debug_spin_unlock_restore(&debug_mutex_lock, flags);
}
/*
@@ -352,7 +352,7 @@
continue;
list_del_init(curr);
DEBUG_OFF();
- debug_spin_lock_restore(&debug_mutex_lock, flags);
+ debug_spin_unlock_restore(&debug_mutex_lock, flags);
printk("BUG: %s/%d, active lock [%p(%p-%p)] freed!\n",
current->comm, current->pid, lock, from, to);
@@ -362,7 +362,7 @@
printk("freeing task is not even the owner??\n");
return;
}
- debug_spin_lock_restore(&debug_mutex_lock, flags);
+ debug_spin_unlock_restore(&debug_mutex_lock, flags);
}
/*