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authorChristoph Hellwig <hch@lst.de>2007-04-23 21:08:12 +0200
committerArnd Bergmann <arnd@klappe.arndb.de>2007-04-23 21:18:54 +0200
commit7ec18ab923a2e377ecb05c74a2d38f457f79950f (patch)
treeb722d8063bfc4b1b44ba67083649efab0c2e5a64 /include
parenta475c2f43520cb095452201da57395000cfeb94c (diff)
[POWERPC] spufs: streamline locking for isolated spu setup
For quite a while now spu state is protected by a simple mutex instead of the old rw_semaphore, and this means we can simplify the locking around spu_setup_isolated a lot. Instead of doing an spu_release before entering spu_setup_isolated and then calling the complicated spu_acquire_exclusive we can now simply enter the function locked an in guaranteed runnable state, so that the only bit of spu_acquire_exclusive that's left is the call to spu_unmap_mappings. Similarly there's no more need to unlock and reacquire the state_mutex when spu_setup_isolated is done, but we can always return with the lock held and only drop it in spu_run_init in the failure case. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
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