On Wed, Sep 03, 2014 at 07:20:04AM -0400, Peter Hurley wrote: > Hi Peter, > > On 09/03/2014 05:27 AM, Peter Zijlstra wrote: > > On Tue, Sep 02, 2014 at 05:39:22PM -0400, Peter Hurley wrote: > >> Provide method for non-essential or non-critical code to warn of > >> invariant errors. > >> > >> CC: Ingo Molnar <mi...@kernel.org> > >> CC: Peter Zijlstra <pet...@infradead.org> > >> CC: Thomas Gleixner <t...@linutronix.de> > >> Signed-off-by: Peter Hurley <pe...@hurleysoftware.com> > >> --- > >> include/linux/spinlock.h | 1 + > >> include/linux/spinlock_api_smp.h | 1 + > >> include/linux/spinlock_api_up.h | 1 + > >> 3 files changed, 3 insertions(+) > >> > >> diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h > >> index 3f2867f..8a9aaf1 100644 > >> --- a/include/linux/spinlock.h > >> +++ b/include/linux/spinlock.h > >> @@ -394,6 +394,7 @@ static inline int spin_can_lock(spinlock_t *lock) > >> } > >> > >> #define assert_spin_locked(lock) assert_raw_spin_locked(&(lock)->rlock) > >> +#define warn_not_spin_locked(lock) > >> warn_not_raw_spin_locked(&(lock)->rlock) > >> > >> /* > >> * Pull the atomic_t declaration: > >> diff --git a/include/linux/spinlock_api_smp.h > >> b/include/linux/spinlock_api_smp.h > >> index 42dfab8..0ddd499 100644 > >> --- a/include/linux/spinlock_api_smp.h > >> +++ b/include/linux/spinlock_api_smp.h > >> @@ -18,6 +18,7 @@ > >> int in_lock_functions(unsigned long addr); > >> > >> #define assert_raw_spin_locked(x) BUG_ON(!raw_spin_is_locked(x)) > >> +#define warn_not_raw_spin_locked(x) > >> WARN_ON_ONCE(!raw_spin_is_locked(x)) > > > > No we should remove assert_spin_locked() not add to it. Use > > lockdep_assert_held() instead. > > I probably should have been more descriptive in the changelog: this > is not for a test configuration, but rather, an assertion in an > exported api.
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