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Change IPL of DRM_SPININIT macro to IPL_NONE. Currently, the only

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mutex initialized by this macro is the dma lock, which certainly
should not be IPL_VM.  The priorities of the other locks should be
revisited.

Also, in DRM_WAIT_ON, enforce the policy of "drm returns -errno
to shared code" (this used to be implemented via a macro).
This commit is contained in:
bjs 2008-07-19 10:09:01 +00:00
parent 3cbb0df829
commit d63b70db6d
1 changed files with 3 additions and 2 deletions
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5
sys/external/bsd/drm/dist/bsd-core/drmP.h vendored
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@ -245,7 +245,7 @@ MALLOC_DECLARE(M_DRM);
#define DRM_CDEVPROC_REAL(l) (l)->l_proc
#define DRM_IOCTL_DATA void *
#define DRM_SPINTYPE kmutex_t
#define DRM_SPININIT(l,name) mutex_init(l, MUTEX_DEFAULT, IPL_VM)
#define DRM_SPININIT(l,name) mutex_init(l, MUTEX_DEFAULT, IPL_NONE)
#define DRM_SPINUNINIT(l) mutex_destroy(l)
#define DRM_SPINLOCK(l) mutex_enter(l)
#define DRM_SPINUNLOCK(u) mutex_exit(u)
@ -491,12 +491,13 @@ for ( ret = 0 ; !ret && !(condition) ; ) { \
DRM_LOCK(); \
}
#elif defined(__NetBSD__)
/* Returns -errno to shared code */
#define DRM_WAIT_ON( ret, queue, timeout, condition ) \
for ( ret = 0 ; !ret && !(condition) ; ) { \
DRM_UNLOCK(); \
mutex_enter(&dev->irq_lock); \
if (!(condition)) \
ret = mtsleep(&(queue), PZERO | PCATCH, \
ret = -mtsleep(&(queue), PZERO | PCATCH, \
"drmwtq", (timeout), &dev->irq_lock); \
mutex_exit(&dev->irq_lock); \
DRM_LOCK(); \