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| author | Kent Overstreet <koverstreet@google.com> | 2013-05-07 16:19:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-07 19:41:50 -0700 |
| commit | 8a6608907cf165b3ae658c9de2efe6af4be68bff (patch) | |
| tree | bb2bee9e1c77576ead3d904fdd409ff355a7a867 | |
| parent | 4e23bcaeb9e8df234e47840ac2c757ab79a0b572 (diff) | |
| download | linux-stable-8a6608907cf165b3ae658c9de2efe6af4be68bff.tar.gz linux-stable-8a6608907cf165b3ae658c9de2efe6af4be68bff.tar.bz2 linux-stable-8a6608907cf165b3ae658c9de2efe6af4be68bff.zip | |
aio: kill ki_key
ki_key wasn't actually used for anything previously - it was always 0.
Drop it to trim struct kiocb a bit.
Signed-off-by: Kent Overstreet <koverstreet@google.com>
Cc: Zach Brown <zab@redhat.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Asai Thambi S P <asamymuthupa@micron.com>
Cc: Selvan Mani <smani@micron.com>
Cc: Sam Bradshaw <sbradshaw@micron.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Reviewed-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/aio.c | 7 | ||||
| -rw-r--r-- | include/linux/aio.h | 9 |
2 files changed, 9 insertions, 7 deletions
@@ -1159,7 +1159,7 @@ static int io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb, } } - ret = put_user(req->ki_key, &user_iocb->aio_key); + ret = put_user(KIOCB_KEY, &user_iocb->aio_key); if (unlikely(ret)) { pr_debug("EFAULT: aio_key\n"); goto out_put_req; @@ -1281,10 +1281,13 @@ static struct kiocb *lookup_kiocb(struct kioctx *ctx, struct iocb __user *iocb, assert_spin_locked(&ctx->ctx_lock); + if (key != KIOCB_KEY) + return NULL; + /* TODO: use a hash or array, this sucks. */ list_for_each(pos, &ctx->active_reqs) { struct kiocb *kiocb = list_kiocb(pos); - if (kiocb->ki_obj.user == iocb && kiocb->ki_key == key) + if (kiocb->ki_obj.user == iocb) return kiocb; } return NULL; diff --git a/include/linux/aio.h b/include/linux/aio.h index f0a8481af99b..7308836dd045 100644 --- a/include/linux/aio.h +++ b/include/linux/aio.h @@ -12,7 +12,7 @@ struct kioctx; struct kiocb; -#define KIOCB_SYNC_KEY (~0U) +#define KIOCB_KEY 0 /* * We use ki_cancel == KIOCB_CANCELLED to indicate that a kiocb has been either @@ -56,10 +56,9 @@ typedef int (kiocb_cancel_fn)(struct kiocb *, struct io_event *); */ struct kiocb { atomic_t ki_users; - unsigned ki_key; /* id of this request */ struct file *ki_filp; - struct kioctx *ki_ctx; /* may be NULL for sync ops */ + struct kioctx *ki_ctx; /* NULL for sync ops */ kiocb_cancel_fn *ki_cancel; ssize_t (*ki_retry)(struct kiocb *); void (*ki_dtor)(struct kiocb *); @@ -95,14 +94,14 @@ struct kiocb { static inline bool is_sync_kiocb(struct kiocb *kiocb) { - return kiocb->ki_key == KIOCB_SYNC_KEY; + return kiocb->ki_ctx == NULL; } static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp) { *kiocb = (struct kiocb) { .ki_users = ATOMIC_INIT(1), - .ki_key = KIOCB_SYNC_KEY, + .ki_ctx = NULL, .ki_filp = filp, .ki_obj.tsk = current, }; |