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spinlock_debug: Print kallsyms name for lock

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When a spinlock warning is printed we usually get

 BUG: spinlock bad magic on CPU#0, modprobe/111
  lock: 0xdff09f38, .magic: 00000000, .owner: /0, .owner_cpu: 0

but it's nicer to print the symbol for the lock if we have it so
that we can avoid 'grep dff09f38 /proc/kallsyms' to find out
which lock it was. Use kallsyms to print the symbol name so we
get something a bit easier to read

 BUG: spinlock bad magic on CPU#0, modprobe/112
  lock: test_lock, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0

Change-Id: I833d011da8362960e97c53ebd59236ac7eb147fd
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Stephen Boyd
2012-04-23 14:30:07 -07:00
parent 364da7c6dd
commit 62878d3ea1
1 changed files with 2 additions and 2 deletions
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lib/spinlock_debug.c
+2 -2
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@@ -61,7 +61,7 @@ static void spin_bug(raw_spinlock_t *lock, const char *msg)
printk(KERN_EMERG "BUG: spinlock %s on CPU#%d, %s/%d\n",
msg, raw_smp_processor_id(),
current->comm, task_pid_nr(current));
printk(KERN_EMERG " lock: %p, .magic: %08x, .owner: %s/%d, "
printk(KERN_EMERG " lock: %ps, .magic: %08x, .owner: %s/%d, "
".owner_cpu: %d\n",
lock, lock->magic,
owner ? owner->comm : "<none>",
@@ -114,7 +114,7 @@ static void __spin_lock_debug(raw_spinlock_t *lock)
if (print_once) {
print_once = 0;
printk(KERN_EMERG "BUG: spinlock lockup on CPU#%d, "
"%s/%d, %p\n",
"%s/%d, %ps\n",
raw_smp_processor_id(), current->comm,
task_pid_nr(current), lock);
dump_stack();