My last commit "splice: don't merge into linked buffers" made the "can_merge" field in struct pipe_buf_operations redundant: Whether a buffer is mergeable is now a property of the buffer, not of the operations struct. Get rid of it.
Signed-off-by: Jann Horn <[email protected]> --- fs/pipe.c | 4 +--- fs/splice.c | 4 ---- include/linux/pipe_fs_i.h | 7 ------- kernel/relay.c | 1 - kernel/trace/trace.c | 2 -- net/smc/smc_rx.c | 1 - 6 files changed, 1 insertion(+), 18 deletions(-) diff --git a/fs/pipe.c b/fs/pipe.c index 4e2eee77f855..b1ad3271c175 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -227,7 +227,6 @@ void generic_pipe_buf_release(struct pipe_inode_info *pipe, EXPORT_SYMBOL(generic_pipe_buf_release); static const struct pipe_buf_operations anon_pipe_buf_ops = { - .can_merge = 1, .confirm = generic_pipe_buf_confirm, .release = anon_pipe_buf_release, .steal = anon_pipe_buf_steal, @@ -235,7 +234,6 @@ static const struct pipe_buf_operations anon_pipe_buf_ops = { }; static const struct pipe_buf_operations packet_pipe_buf_ops = { - .can_merge = 0, .confirm = generic_pipe_buf_confirm, .release = anon_pipe_buf_release, .steal = anon_pipe_buf_steal, @@ -379,7 +377,7 @@ pipe_write(struct kiocb *iocb, struct iov_iter *from) struct pipe_buffer *buf = pipe->bufs + lastbuf; int offset = buf->offset + buf->len; - if (buf->ops->can_merge && offset + chars <= PAGE_SIZE && + if (offset + chars <= PAGE_SIZE && (buf->flags & PIPE_BUF_FLAG_MAYMERGE)) { ret = pipe_buf_confirm(pipe, buf); if (ret) diff --git a/fs/splice.c b/fs/splice.c index 111977c80dfd..fb7412b2eadb 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -138,7 +138,6 @@ static int page_cache_pipe_buf_confirm(struct pipe_inode_info *pipe, } const struct pipe_buf_operations page_cache_pipe_buf_ops = { - .can_merge = 0, .confirm = page_cache_pipe_buf_confirm, .release = page_cache_pipe_buf_release, .steal = page_cache_pipe_buf_steal, @@ -156,7 +155,6 @@ static int user_page_pipe_buf_steal(struct pipe_inode_info *pipe, } static const struct pipe_buf_operations user_page_pipe_buf_ops = { - .can_merge = 0, .confirm = generic_pipe_buf_confirm, .release = page_cache_pipe_buf_release, .steal = user_page_pipe_buf_steal, @@ -326,7 +324,6 @@ ssize_t generic_file_splice_read(struct file *in, loff_t *ppos, EXPORT_SYMBOL(generic_file_splice_read); const struct pipe_buf_operations default_pipe_buf_ops = { - .can_merge = 0, .confirm = generic_pipe_buf_confirm, .release = generic_pipe_buf_release, .steal = generic_pipe_buf_steal, @@ -341,7 +338,6 @@ static int generic_pipe_buf_nosteal(struct pipe_inode_info *pipe, /* Pipe buffer operations for a socket and similar. */ const struct pipe_buf_operations nosteal_pipe_buf_ops = { - .can_merge = 0, .confirm = generic_pipe_buf_confirm, .release = generic_pipe_buf_release, .steal = generic_pipe_buf_nosteal, diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h index 8893711f9171..03d3529c7654 100644 --- a/include/linux/pipe_fs_i.h +++ b/include/linux/pipe_fs_i.h @@ -81,13 +81,6 @@ struct pipe_inode_info { * in fs/pipe.c for the pipe and generic variants of these hooks. */ struct pipe_buf_operations { - /* - * This is set to 1, if the generic pipe read/write may coalesce - * data into an existing buffer. If this is set to 0, a new pipe - * page segment is always used for new data. - */ - int can_merge; - /* * ->confirm() verifies that the data in the pipe buffer is there * and that the contents are good. If the pages in the pipe belong diff --git a/kernel/relay.c b/kernel/relay.c index 04f248644e06..db3e419c25a6 100644 --- a/kernel/relay.c +++ b/kernel/relay.c @@ -1175,7 +1175,6 @@ static void relay_pipe_buf_release(struct pipe_inode_info *pipe, } static const struct pipe_buf_operations relay_pipe_buf_ops = { - .can_merge = 0, .confirm = generic_pipe_buf_confirm, .release = relay_pipe_buf_release, .steal = generic_pipe_buf_steal, diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index bf6f1d70484d..820eff45e907 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -5803,7 +5803,6 @@ static void tracing_spd_release_pipe(struct splice_pipe_desc *spd, } static const struct pipe_buf_operations tracing_pipe_buf_ops = { - .can_merge = 0, .confirm = generic_pipe_buf_confirm, .release = generic_pipe_buf_release, .steal = generic_pipe_buf_steal, @@ -6823,7 +6822,6 @@ static void buffer_pipe_buf_get(struct pipe_inode_info *pipe, /* Pipe buffer operations for a buffer. */ static const struct pipe_buf_operations buffer_pipe_buf_ops = { - .can_merge = 0, .confirm = generic_pipe_buf_confirm, .release = buffer_pipe_buf_release, .steal = generic_pipe_buf_steal, diff --git a/net/smc/smc_rx.c b/net/smc/smc_rx.c index bbcf0fe4ae10..413a6abf227e 100644 --- a/net/smc/smc_rx.c +++ b/net/smc/smc_rx.c @@ -136,7 +136,6 @@ static int smc_rx_pipe_buf_nosteal(struct pipe_inode_info *pipe, } static const struct pipe_buf_operations smc_pipe_ops = { - .can_merge = 0, .confirm = generic_pipe_buf_confirm, .release = smc_rx_pipe_buf_release, .steal = smc_rx_pipe_buf_nosteal, -- 2.19.0.605.g01d371f741-goog
