linux-kernel - [PATCH 05/13] fs: make do_loop_readv

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Date:	Mon, 11 Jan 2016 17:07:06 -0500
From:	Benjamin LaHaise <bcrl@...ck.org>
To:	linux-aio@...ck.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
	linux-mm@...ck.org
Cc:	Alexander Viro <viro@...iv.linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 05/13] fs: make do_loop_readv_writev() non-static

The threaded aio helper code needs to be able to call
do_loop_readv_writev() to perform i/o to file_operations that do not have
read_iter or write_iter methods.  Make the prototype for
do_loop_readv_writev() non-static and move it into fs/internal.h

Signed-off-by: Benjamin LaHaise <ben.lahaise@...acesystems.com>
Signed-off-by: Benjamin LaHaise <bcrl@...ck.org>
---
 fs/internal.h   | 6 ++++++
 fs/read_write.c | 5 +----
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/fs/internal.h b/fs/internal.h
index 71859c4d..57b6010 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -16,6 +16,9 @@ struct path;
 struct mount;
 struct shrink_control;
 
+typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
+typedef ssize_t (*iter_fn_t)(struct kiocb *, struct iov_iter *);
+
 /*
  * block_dev.c
  */
@@ -135,6 +138,9 @@ extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
  * read_write.c
  */
 extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
+extern ssize_t do_loop_readv_writev(struct file *filp, struct iov_iter *iter,
+				    loff_t *ppos, io_fn_t fn);
+
 
 /*
  * pipe.c
diff --git a/fs/read_write.c b/fs/read_write.c
index 819ef3f..36344ff 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -21,9 +21,6 @@
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 
-typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
-typedef ssize_t (*iter_fn_t)(struct kiocb *, struct iov_iter *);
-
 const struct file_operations generic_ro_fops = {
 	.llseek		= generic_file_llseek,
 	.read_iter	= generic_file_read_iter,
@@ -668,7 +665,7 @@ static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
 }
 
 /* Do it by hand, with file-ops */
-static ssize_t do_loop_readv_writev(struct file *filp, struct iov_iter *iter,
+ssize_t do_loop_readv_writev(struct file *filp, struct iov_iter *iter,
 		loff_t *ppos, io_fn_t fn)
 {
 	ssize_t ret = 0;
-- 
2.5.0


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