On Sun, Nov 23, 2014 at 11:29:08PM +0100, Richard Weinberger wrote:
> On Sun, Nov 23, 2014 at 3:20 PM, Pieter Smith <pieter@xxxxxxxxxx> wrote:
> > To implement splice support, fs/fuse makes use of nosteal_pipe_buf_ops. This
> > struct is exported by fs/splice. The goal of the larger patch set is to
> > completely compile out fs/splice, so uses of the exported struct need to be
> > compiled out along with fs/splice.
> >
> > This patch therefore compiles out splice support in fs/fuse when
> > CONFIG_SYSCALL_SPLICE is undefined.
> >
> > Signed-off-by: Pieter Smith <pieter@xxxxxxxxxx>
> > ---
> > fs/fuse/dev.c | 4 ++--
> > include/linux/fs.h | 6 ++++++
> > 2 files changed, 8 insertions(+), 2 deletions(-)
> >
> > diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
> > index ca88731..f8f92a4 100644
> > --- a/fs/fuse/dev.c
> > +++ b/fs/fuse/dev.c
> > @@ -1291,7 +1291,7 @@ static ssize_t fuse_dev_read(struct kiocb *iocb, const struct iovec *iov,
> > return fuse_dev_do_read(fc, file, &cs, iov_length(iov, nr_segs));
> > }
> >
> > -static ssize_t fuse_dev_splice_read(struct file *in, loff_t *ppos,
> > +static ssize_t __maybe_unused fuse_dev_splice_read(struct file *in, loff_t *ppos,
> > struct pipe_inode_info *pipe,
> > size_t len, unsigned int flags)
> > {
> > @@ -2144,7 +2144,7 @@ const struct file_operations fuse_dev_operations = {
> > .llseek = no_llseek,
> > .read = do_sync_read,
> > .aio_read = fuse_dev_read,
> > - .splice_read = fuse_dev_splice_read,
> > + .splice_read = __splice_p(fuse_dev_splice_read),
> > .write = do_sync_write,
> > .aio_write = fuse_dev_write,
> > .splice_write = fuse_dev_splice_write,
> > diff --git a/include/linux/fs.h b/include/linux/fs.h
> > index a957d43..04c0975 100644
> > --- a/include/linux/fs.h
> > +++ b/include/linux/fs.h
> > @@ -2443,6 +2443,12 @@ extern int blkdev_fsync(struct file *filp, loff_t start, loff_t end,
> > int datasync);
> > extern void block_sync_page(struct page *page);
> >
> > +#ifdef CONFIG_SYSCALL_SPLICE
> > +#define __splice_p(x) x
> > +#else
> > +#define __splice_p(x) NULL
> > +#endif
> > +
>
> This needs to go into a different patch.
> One logical change per patch please. :-)
Easy enough to merge this one into the patch introducing
CONFIG_SYSCALL_SPLICE, then.
- Josh Triplett
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