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Date: Wed, 14 Sep 2016 10:37:12 +0200
From: Miklos Szeredi <mszeredi@...hat.com>
To: linux-fsdevel@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>
Subject: [PATCH 07/11] pipe: remove generic_pipe_buf_confirm()
Now all instances of .confirm are set to generic_pipe_buf_confirm(). The
method and the helper can be removed.
Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
---
fs/pipe.c | 18 ------------------
fs/splice.c | 4 ----
include/linux/pipe_fs_i.h | 18 +-----------------
kernel/relay.c | 1 -
kernel/trace/trace.c | 2 --
5 files changed, 1 insertion(+), 42 deletions(-)
diff --git a/fs/pipe.c b/fs/pipe.c
index 4fc422f0dea8..47b41568b3fc 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -200,22 +200,6 @@ void generic_pipe_buf_get(struct pipe_inode_info *pipe, struct pipe_buffer *buf)
EXPORT_SYMBOL(generic_pipe_buf_get);
/**
- * generic_pipe_buf_confirm - verify contents of the pipe buffer
- * @info: the pipe that the buffer belongs to
- * @buf: the buffer to confirm
- *
- * Description:
- * This function does nothing, because the generic pipe code uses
- * pages that are always good when inserted into the pipe.
- */
-int generic_pipe_buf_confirm(struct pipe_inode_info *info,
- struct pipe_buffer *buf)
-{
- return 0;
-}
-EXPORT_SYMBOL(generic_pipe_buf_confirm);
-
-/**
* generic_pipe_buf_release - put a reference to a &struct pipe_buffer
* @pipe: the pipe that the buffer belongs to
* @buf: the buffer to put a reference to
@@ -232,7 +216,6 @@ 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,
.get = generic_pipe_buf_get,
@@ -240,7 +223,6 @@ 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,
.get = generic_pipe_buf_get,
diff --git a/fs/splice.c b/fs/splice.c
index 0ecbe3011796..dc4648ba6e8d 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -95,7 +95,6 @@ static void page_cache_pipe_buf_release(struct pipe_inode_info *pipe,
const struct pipe_buf_operations page_cache_pipe_buf_ops = {
.can_merge = 0,
- .confirm = generic_pipe_buf_confirm,
.release = page_cache_pipe_buf_release,
.steal = page_cache_pipe_buf_steal,
.get = generic_pipe_buf_get,
@@ -113,7 +112,6 @@ 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,
.get = generic_pipe_buf_get,
@@ -507,7 +505,6 @@ EXPORT_SYMBOL(generic_file_splice_read);
static 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,
.get = generic_pipe_buf_get,
@@ -522,7 +519,6 @@ 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,
.get = generic_pipe_buf_get,
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index e7497c9dde7f..ae9d87ea95cb 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -62,12 +62,6 @@ struct pipe_inode_info {
};
/*
- * Note on the nesting of these functions:
- *
- * ->confirm()
- * ->steal()
- *
- * That is, ->steal() must be called on a confirmed buffer.
* See below for the meaning of each operation. Also see kerneldoc
* in fs/pipe.c for the pipe and generic variants of these hooks.
*/
@@ -80,15 +74,6 @@ struct pipe_buf_operations {
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
- * to a file system, we may need to wait for IO completion in this
- * hook. Returns 0 for good, or a negative error value in case of
- * error.
- */
- int (*confirm)(struct pipe_inode_info *, struct pipe_buffer *);
-
- /*
* When the contents of this pipe buffer has been completely
* consumed by a reader, ->release() is called.
*/
@@ -143,7 +128,7 @@ static inline void pipe_buf_release(struct pipe_inode_info *pipe,
static inline int pipe_buf_confirm(struct pipe_inode_info *pipe,
struct pipe_buffer *buf)
{
- return buf->ops->confirm(pipe, buf);
+ return 0;
}
/**
@@ -179,7 +164,6 @@ void free_pipe_info(struct pipe_inode_info *);
/* Generic pipe buffer ops functions */
void generic_pipe_buf_get(struct pipe_inode_info *, struct pipe_buffer *);
-int generic_pipe_buf_confirm(struct pipe_inode_info *, struct pipe_buffer *);
int generic_pipe_buf_steal(struct pipe_inode_info *, struct pipe_buffer *);
void generic_pipe_buf_release(struct pipe_inode_info *, struct pipe_buffer *);
diff --git a/kernel/relay.c b/kernel/relay.c
index d797502140b9..da954ce520b2 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -1223,7 +1223,6 @@ 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,
.get = generic_pipe_buf_get,
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index dade4c9559cc..bdf891c78708 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -5219,7 +5219,6 @@ 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,
.get = generic_pipe_buf_get,
@@ -6114,7 +6113,6 @@ 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,
.get = buffer_pipe_buf_get,
--
2.5.5
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