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drm: export drm_global_mutex for drivers to use

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Nouveau needs to be able to drop the mutex before sleeping to prevent a
deadlock from occuring.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2010-08-26 14:58:57 +10:00
parent ee508b821c
commit e3461a2bc0
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/drm_fops.c
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@ -41,6 +41,7 @@
/* from BKL pushdown: note that nothing else serializes idr_find() */ /* from BKL pushdown: note that nothing else serializes idr_find() */
DEFINE_MUTEX(drm_global_mutex); DEFINE_MUTEX(drm_global_mutex);
EXPORT_SYMBOL(drm_global_mutex);
static int drm_open_helper(struct inode *inode, struct file *filp, static int drm_open_helper(struct inode *inode, struct file *filp,
struct drm_device * dev); struct drm_device * dev);