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authorChristoph Hellwig <hch@lst.de>2007-02-13 21:36:50 +0100
committerArnd Bergmann <arnd@klappe.arndb.de>2007-02-13 21:52:37 +0100
commit650f8b0291ecd0abdeadbd0ff3d70c3538e55405 (patch)
tree3d3df208380ac7b2fafdd03b5fbcc01d2dedd934 /arch/powerpc/platforms/cell/spufs/spufs.h
parent202557d29eae528f464652e92085f3b19b05a0a7 (diff)
[POWERPC] spufs: simplify state_mutex
The r/w semaphore to lock the spus was overkill and can be replaced with a mutex to make it faster, simpler and easier to debug. It also helps to allow making most spufs interruptible in future patches. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/spufs.h')
-rw-r--r--arch/powerpc/platforms/cell/spufs/spufs.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/spufs.h b/arch/powerpc/platforms/cell/spufs/spufs.h
index 9b44abe921cc..de2401afb226 100644
--- a/arch/powerpc/platforms/cell/spufs/spufs.h
+++ b/arch/powerpc/platforms/cell/spufs/spufs.h
@@ -23,7 +23,7 @@
#define SPUFS_H
#include <linux/kref.h>
-#include <linux/rwsem.h>
+#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/fs.h>
@@ -53,7 +53,7 @@ struct spu_context {
u64 object_id; /* user space pointer for oprofile */
enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;
- struct rw_semaphore state_sema;
+ struct mutex state_mutex;
struct semaphore run_sema;
struct mm_struct *owner;
@@ -173,7 +173,7 @@ int spu_acquire_exclusive(struct spu_context *ctx);
static inline void spu_release_exclusive(struct spu_context *ctx)
{
- up_write(&ctx->state_sema);
+ mutex_unlock(&ctx->state_mutex);
}
int spu_activate(struct spu_context *ctx, u64 flags);

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