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| author | jhb <jhb@FreeBSD.org> | 2006-06-03 20:45:00 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2006-06-03 20:45:00 +0000 |
| commit | 9c15984c1bbf14716670b818e9aa27a5fc47ce03 (patch) | |
| tree | 9d1bb9b6da7bcfb8e9badcbb89de5e5e8d658a62 /sys/kern/kern_mutex.c | |
| parent | 4f9dae34b792b8e0e7862e2ac3fef12ff2c0668a (diff) | |
| download | FreeBSD-src-9c15984c1bbf14716670b818e9aa27a5fc47ce03.zip FreeBSD-src-9c15984c1bbf14716670b818e9aa27a5fc47ce03.tar.gz | |
Simplify mtx_owner() so it only reads m->mtx_lock once.
Diffstat (limited to 'sys/kern/kern_mutex.c')
| -rw-r--r-- | sys/kern/kern_mutex.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/sys/kern/kern_mutex.c b/sys/kern/kern_mutex.c index 6c5b2a3..65b8300 100644 --- a/sys/kern/kern_mutex.c +++ b/sys/kern/kern_mutex.c @@ -85,8 +85,7 @@ __FBSDID("$FreeBSD$"); */ #define mtx_unowned(m) ((m)->mtx_lock == MTX_UNOWNED) -#define mtx_owner(m) (mtx_unowned((m)) ? NULL \ - : (struct thread *)((m)->mtx_lock & MTX_FLAGMASK)) +#define mtx_owner(m) ((struct thread *)((m)->mtx_lock & (MTX_FLAGMASK|MTX_UNOWNED))) #ifdef DDB static void db_show_mtx(struct lock_object *lock); |
