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Message-Id: <1363883754-27966-7-git-send-email-koverstreet@google.com>
Date: Thu, 21 Mar 2013 09:35:27 -0700
From: Kent Overstreet <koverstreet@...gle.com>
To: linux-kernel@...r.kernel.org, linux-aio@...ck.org,
akpm@...ux-foundation.org
Cc: Kent Overstreet <koverstreet@...gle.com>,
Felipe Balbi <balbi@...com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Mark Fasheh <mfasheh@...e.com>,
Joel Becker <jlbec@...lplan.org>,
Rusty Russell <rusty@...tcorp.com.au>,
Jens Axboe <axboe@...nel.dk>,
Asai Thambi S P <asamymuthupa@...ron.com>,
Selvan Mani <smani@...ron.com>,
Sam Bradshaw <sbradshaw@...ron.com>,
Jeff Moyer <jmoyer@...hat.com>,
Al Viro <viro@...iv.linux.org.uk>,
Benjamin LaHaise <bcrl@...ck.org>,
Theodore Ts'o <tytso@....edu>
Subject: [PATCH 06/33] aio: kill return value of aio_complete()
Nothing used the return value, and it probably wasn't possible to use it
safely for the locked versions (aio_complete(), aio_put_req()). Just kill
it.
Signed-off-by: Kent Overstreet <koverstreet@...gle.com>
Acked-by: Zach Brown <zab@...hat.com>
Cc: Felipe Balbi <balbi@...com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Mark Fasheh <mfasheh@...e.com>
Cc: Joel Becker <jlbec@...lplan.org>
Cc: Rusty Russell <rusty@...tcorp.com.au>
Cc: Jens Axboe <axboe@...nel.dk>
Cc: Asai Thambi S P <asamymuthupa@...ron.com>
Cc: Selvan Mani <smani@...ron.com>
Cc: Sam Bradshaw <sbradshaw@...ron.com>
Cc: Jeff Moyer <jmoyer@...hat.com>
Cc: Al Viro <viro@...iv.linux.org.uk>
Cc: Benjamin LaHaise <bcrl@...ck.org>
Cc: Theodore Ts'o <tytso@....edu>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---
fs/aio.c | 21 +++++++--------------
include/linux/aio.h | 8 ++++----
2 files changed, 11 insertions(+), 18 deletions(-)
diff --git a/fs/aio.c b/fs/aio.c
index f9a7e6a..6b29e41a 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -531,7 +531,7 @@ static inline void really_put_req(struct kioctx *ctx, struct kiocb *req)
/* __aio_put_req
* Returns true if this put was the last user of the request.
*/
-static int __aio_put_req(struct kioctx *ctx, struct kiocb *req)
+static void __aio_put_req(struct kioctx *ctx, struct kiocb *req)
{
dprintk(KERN_DEBUG "aio_put(%p): f_count=%ld\n",
req, atomic_long_read(&req->ki_filp->f_count));
@@ -541,7 +541,7 @@ static int __aio_put_req(struct kioctx *ctx, struct kiocb *req)
req->ki_users--;
BUG_ON(req->ki_users < 0);
if (likely(req->ki_users))
- return 0;
+ return;
list_del(&req->ki_list); /* remove from active_reqs */
req->ki_cancel = NULL;
req->ki_retry = NULL;
@@ -549,21 +549,18 @@ static int __aio_put_req(struct kioctx *ctx, struct kiocb *req)
fput(req->ki_filp);
req->ki_filp = NULL;
really_put_req(ctx, req);
- return 1;
}
/* aio_put_req
* Returns true if this put was the last user of the kiocb,
* false if the request is still in use.
*/
-int aio_put_req(struct kiocb *req)
+void aio_put_req(struct kiocb *req)
{
struct kioctx *ctx = req->ki_ctx;
- int ret;
spin_lock_irq(&ctx->ctx_lock);
- ret = __aio_put_req(ctx, req);
+ __aio_put_req(ctx, req);
spin_unlock_irq(&ctx->ctx_lock);
- return ret;
}
EXPORT_SYMBOL(aio_put_req);
@@ -593,10 +590,8 @@ static struct kioctx *lookup_ioctx(unsigned long ctx_id)
/* aio_complete
* Called when the io request on the given iocb is complete.
- * Returns true if this is the last user of the request. The
- * only other user of the request can be the cancellation code.
*/
-int aio_complete(struct kiocb *iocb, long res, long res2)
+void aio_complete(struct kiocb *iocb, long res, long res2)
{
struct kioctx *ctx = iocb->ki_ctx;
struct aio_ring_info *info;
@@ -604,7 +599,6 @@ int aio_complete(struct kiocb *iocb, long res, long res2)
struct io_event *event;
unsigned long flags;
unsigned long tail;
- int ret;
/*
* Special case handling for sync iocbs:
@@ -618,7 +612,7 @@ int aio_complete(struct kiocb *iocb, long res, long res2)
iocb->ki_user_data = res;
iocb->ki_users = 0;
wake_up_process(iocb->ki_obj.tsk);
- return 1;
+ return;
}
info = &ctx->ring_info;
@@ -677,7 +671,7 @@ int aio_complete(struct kiocb *iocb, long res, long res2)
put_rq:
/* everything turned out well, dispose of the aiocb. */
- ret = __aio_put_req(ctx, iocb);
+ __aio_put_req(ctx, iocb);
/*
* We have to order our ring_info tail store above and test
@@ -691,7 +685,6 @@ put_rq:
wake_up(&ctx->wait);
spin_unlock_irqrestore(&ctx->ctx_lock, flags);
- return ret;
}
EXPORT_SYMBOL(aio_complete);
diff --git a/include/linux/aio.h b/include/linux/aio.h
index 019204e..615d55a 100644
--- a/include/linux/aio.h
+++ b/include/linux/aio.h
@@ -167,16 +167,16 @@ struct kioctx {
/* prototypes */
#ifdef CONFIG_AIO
extern ssize_t wait_on_sync_kiocb(struct kiocb *iocb);
-extern int aio_put_req(struct kiocb *iocb);
-extern int aio_complete(struct kiocb *iocb, long res, long res2);
+extern void aio_put_req(struct kiocb *iocb);
+extern void aio_complete(struct kiocb *iocb, long res, long res2);
struct mm_struct;
extern void exit_aio(struct mm_struct *mm);
extern long do_io_submit(aio_context_t ctx_id, long nr,
struct iocb __user *__user *iocbpp, bool compat);
#else
static inline ssize_t wait_on_sync_kiocb(struct kiocb *iocb) { return 0; }
-static inline int aio_put_req(struct kiocb *iocb) { return 0; }
-static inline int aio_complete(struct kiocb *iocb, long res, long res2) { return 0; }
+static inline void aio_put_req(struct kiocb *iocb) { }
+static inline void aio_complete(struct kiocb *iocb, long res, long res2) { }
struct mm_struct;
static inline void exit_aio(struct mm_struct *mm) { }
static inline long do_io_submit(aio_context_t ctx_id, long nr,
--
1.8.1.3
--
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