From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
commit 833f4154ed560232120bc475935ee1d6a20e159f upstream.
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/aio.c | 29 +++++++----------------------
1 file changed, 7 insertions(+), 22 deletions(-)
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1992,24 +1992,6 @@ COMPAT_SYSCALL_DEFINE3(io_submit, compat
}
#endif
-/* lookup_kiocb
- * Finds a given iocb for cancellation.
- */
-static struct aio_kiocb *
-lookup_kiocb(struct kioctx *ctx, struct iocb __user *iocb)
-{
- struct aio_kiocb *kiocb;
-
- assert_spin_locked(&ctx->ctx_lock);
-
- /* TODO: use a hash or array, this sucks. */
- list_for_each_entry(kiocb, &ctx->active_reqs, ki_list) {
- if (kiocb->ki_user_iocb == iocb)
- return kiocb;
- }
- return NULL;
-}
-
/* sys_io_cancel:
* Attempts to cancel an iocb previously passed to io_submit. If
* the operation is successfully cancelled, the resulting event is
@@ -2038,10 +2020,13 @@ SYSCALL_DEFINE3(io_cancel, aio_context_t
return -EINVAL;
spin_lock_irq(&ctx->ctx_lock);
- kiocb = lookup_kiocb(ctx, iocb);
- if (kiocb) {
- ret = kiocb->ki_cancel(&kiocb->rw);
- list_del_init(&kiocb->ki_list);
+ /* TODO: use a hash or array, this sucks. */
+ list_for_each_entry(kiocb, &ctx->active_reqs, ki_list) {
+ if (kiocb->ki_user_iocb == iocb) {
+ ret = kiocb->ki_cancel(&kiocb->rw);
+ list_del_init(&kiocb->ki_list);
+ break;
+ }
}
spin_unlock_irq(&ctx->ctx_lock);
