[POWERPC] spufs: Synchronize pte invalidation vs ps close
Make sure the mapping_lock also protects access to the various address_space
pointers used for tearing down the ptes on a spu context switch.
Because unmap_mapping_range can sleep we need to turn mapping_lock from
a spinlock into a sleeping mutex.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/cell/spufs/context.c b/arch/powerpc/platforms/cell/spufs/context.c
index 8654749..7c51cb5 100644
--- a/arch/powerpc/platforms/cell/spufs/context.c
+++ b/arch/powerpc/platforms/cell/spufs/context.c
@@ -39,7 +39,7 @@
if (spu_init_csa(&ctx->csa))
goto out_free;
spin_lock_init(&ctx->mmio_lock);
- spin_lock_init(&ctx->mapping_lock);
+ mutex_init(&ctx->mapping_lock);
kref_init(&ctx->kref);
mutex_init(&ctx->state_mutex);
mutex_init(&ctx->run_mutex);
@@ -103,6 +103,7 @@
void spu_unmap_mappings(struct spu_context *ctx)
{
+ mutex_lock(&ctx->mapping_lock);
if (ctx->local_store)
unmap_mapping_range(ctx->local_store, 0, LS_SIZE, 1);
if (ctx->mfc)
@@ -117,6 +118,7 @@
unmap_mapping_range(ctx->mss, 0, 0x1000, 1);
if (ctx->psmap)
unmap_mapping_range(ctx->psmap, 0, 0x20000, 1);
+ mutex_unlock(&ctx->mapping_lock);
}
/**