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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-07-08 12:19:54 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-07-08 12:36:28 +1000 |
| commit | e74abeb3c34dcbfcf0d1b3c4462178d9c543c3a9 (patch) | |
| tree | f1d47261313c381bbba3170b86a17d9fe909073e /core | |
| parent | be5a949949cf116025e1c018cd26c4707c669073 (diff) | |
| download | skiboot-e74abeb3c34dcbfcf0d1b3c4462178d9c543c3a9.zip skiboot-e74abeb3c34dcbfcf0d1b3c4462178d9c543c3a9.tar.gz skiboot-e74abeb3c34dcbfcf0d1b3c4462178d9c543c3a9.tar.bz2 | |
lock: Add helper to check if this CPU is already holding a lock
For debug purposes essentially
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'core')
| -rw-r--r-- | core/lock.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/core/lock.c b/core/lock.c index fc4bf6b..70fb994 100644 --- a/core/lock.c +++ b/core/lock.c @@ -61,6 +61,12 @@ static inline void lock_check(struct lock *l) { }; static inline void unlock_check(struct lock *l) { }; #endif /* DEBUG_LOCKS */ +bool lock_held_by_me(struct lock *l) +{ + uint64_t pir64 = this_cpu()->pir; + + return l->lock_val == ((pir64 << 32) | 1); +} bool try_lock(struct lock *l) { |