powerpc/spufs: Get rid of broken fasync stuff

In all the years it's been in the tree it had never been used by
anything - it would instantly trigger BUG_ON() in fs/fcntl.c due to
bogus band argument (ie. POLLIN not POLL_IN) passed to kill_fasync().
Since nobody had ever used it in ten years, let's just rip it out and be
done with that.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index a35e2c2..03f2cdf 100644 (file)
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -684,23 +684,13 @@ size_t spu_ibox_read(struct spu_context *ctx, u32 *data)
        return ctx->ops->ibox_read(ctx, data);
 }
 
-static int spufs_ibox_fasync(int fd, struct file *file, int on)
-{
-       struct spu_context *ctx = file->private_data;
-
-       return fasync_helper(fd, file, on, &ctx->ibox_fasync);
-}
-
 /* interrupt-level ibox callback function. */
 void spufs_ibox_callback(struct spu *spu)
 {
        struct spu_context *ctx = spu->ctx;
 
-       if (!ctx)
-               return;
-
-       wake_up_all(&ctx->ibox_wq);
-       kill_fasync(&ctx->ibox_fasync, SIGIO, POLLIN);
+       if (ctx)
+               wake_up_all(&ctx->ibox_wq);
 }
 
 /*
@@ -795,7 +785,6 @@ static const struct file_operations spufs_ibox_fops = {
        .open   = spufs_pipe_open,
        .read   = spufs_ibox_read,
        .poll   = spufs_ibox_poll,
-       .fasync = spufs_ibox_fasync,
        .llseek = no_llseek,
 };
 
@@ -833,26 +822,13 @@ size_t spu_wbox_write(struct spu_context *ctx, u32 data)
        return ctx->ops->wbox_write(ctx, data);
 }
 
-static int spufs_wbox_fasync(int fd, struct file *file, int on)
-{
-       struct spu_context *ctx = file->private_data;
-       int ret;
-
-       ret = fasync_helper(fd, file, on, &ctx->wbox_fasync);
-
-       return ret;
-}
-
 /* interrupt-level wbox callback function. */
 void spufs_wbox_callback(struct spu *spu)
 {
        struct spu_context *ctx = spu->ctx;
 
-       if (!ctx)
-               return;
-
-       wake_up_all(&ctx->wbox_wq);
-       kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT);
+       if (ctx)
+               wake_up_all(&ctx->wbox_wq);
 }
 
 /*
@@ -945,7 +921,6 @@ static const struct file_operations spufs_wbox_fops = {
        .open   = spufs_pipe_open,
        .write  = spufs_wbox_write,
        .poll   = spufs_wbox_poll,
-       .fasync = spufs_wbox_fasync,
        .llseek = no_llseek,
 };
 
@@ -1521,28 +1496,8 @@ void spufs_mfc_callback(struct spu *spu)
 {
        struct spu_context *ctx = spu->ctx;
 
-       if (!ctx)
-               return;
-
-       wake_up_all(&ctx->mfc_wq);
-
-       pr_debug("%s %s\n", __func__, spu->name);
-       if (ctx->mfc_fasync) {
-               u32 free_elements, tagstatus;
-               unsigned int mask;
-
-               /* no need for spu_acquire in interrupt context */
-               free_elements = ctx->ops->get_mfc_free_elements(ctx);
-               tagstatus = ctx->ops->read_mfc_tagstatus(ctx);
-
-               mask = 0;
-               if (free_elements & 0xffff)
-                       mask |= POLLOUT;
-               if (tagstatus & ctx->tagwait)
-                       mask |= POLLIN;
-
-               kill_fasync(&ctx->mfc_fasync, SIGIO, mask);
-       }
+       if (ctx)
+               wake_up_all(&ctx->mfc_wq);
 }
 
 static int spufs_read_mfc_tagstatus(struct spu_context *ctx, u32 *status)
@@ -1804,13 +1759,6 @@ static int spufs_mfc_fsync(struct file *file, loff_t start, loff_t end, int data
        return err;
 }
 
-static int spufs_mfc_fasync(int fd, struct file *file, int on)
-{
-       struct spu_context *ctx = file->private_data;
-
-       return fasync_helper(fd, file, on, &ctx->mfc_fasync);
-}
-
 static const struct file_operations spufs_mfc_fops = {
        .open    = spufs_mfc_open,
        .release = spufs_mfc_release,
@@ -1819,7 +1767,6 @@ static const struct file_operations spufs_mfc_fops = {
        .poll    = spufs_mfc_poll,
        .flush   = spufs_mfc_flush,
        .fsync   = spufs_mfc_fsync,
-       .fasync  = spufs_mfc_fasync,
        .mmap    = spufs_mfc_mmap,
        .llseek  = no_llseek,
 };

diff --git a/arch/powerpc/platforms/cell/spufs/spufs.h b/arch/powerpc/platforms/cell/spufs/spufs.h
index bcfd6f0..aac7339 100644 (file)
--- a/arch/powerpc/platforms/cell/spufs/spufs.h
+++ b/arch/powerpc/platforms/cell/spufs/spufs.h
@@ -102,9 +102,6 @@ struct spu_context {
        wait_queue_head_t stop_wq;
        wait_queue_head_t mfc_wq;
        wait_queue_head_t run_wq;
-       struct fasync_struct *ibox_fasync;
-       struct fasync_struct *wbox_fasync;
-       struct fasync_struct *mfc_fasync;
        u32 tagwait;
        struct spu_context_ops *ops;
        struct work_struct reap_work;