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| author | Andreas Pokorny <andreas.pokorny@gmail.com> | 2009-06-03 21:04:47 +0200 |
|---|---|---|
| committer | Andreas Pokorny <andreas.pokorny@gmail.com> | 2009-06-03 21:04:47 +0200 |
| commit | f3ef2188923d357c94a2421024c8288e428feccb (patch) | |
| tree | dd77593dcb5bf87557471ec933bed0f52de85bb6 /drivers/mfd/glamo/glamo-drm-private.h | |
| parent | e8950ddf2823a4b2698870b057409fd98abb3aae (diff) | |
Glamo DRM: Adding a Semaphore and Spinlock
This is the first step towards the irq based update of the write
pointer. With this revision the previous wait, and direct update is
deactivated.
Signed-off-by: Andreas Pokorny <andreas.pokorny@gmail.com>
Diffstat (limited to 'drivers/mfd/glamo/glamo-drm-private.h')
| -rw-r--r-- | drivers/mfd/glamo/glamo-drm-private.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mfd/glamo/glamo-drm-private.h b/drivers/mfd/glamo/glamo-drm-private.h index 59fbc2488c5..9442532dafe 100644 --- a/drivers/mfd/glamo/glamo-drm-private.h +++ b/drivers/mfd/glamo/glamo-drm-private.h @@ -29,6 +29,8 @@ #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/spinlock.h> +#include <linux/semaphore.h> #include "glamo-core.h" @@ -56,6 +58,12 @@ struct glamodrm_handle { /* Memory management */ struct drm_mm *mmgr; + + /* semaphore against concurrent ioctl */ + struct semaphore add_to_ring; + + spinlock_t new_ring_write_lock; + size_t new_ring_write; }; /* Private data. This is where we keep our memory management bits */ |