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Fix up over-eager 'wait_queue_t' renaming

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Commit ac6424b981 ("sched/wait: Rename wait_queue_t =>
wait_queue_entry_t") had scripted the renaming incorrectly, and didn't
actually check that the 'wait_queue_t' was a full token.

As a result, it also triggered on 'wait_queue_token', and renamed that
to 'wait_queue_entry_token' entry in the autofs4 packet structure
definition too.  That was entirely incorrect, and not intended.

The end result built fine when building just the kernel - because
everything had been renamed consistently there - but caused problems in
user space because the "struct autofs_packet_missing" type is exported
as part of the uapi.

This scripts it all back again:

    git grep -lw wait_queue_entry_token |
        xargs sed -i 's/wait_queue_entry_token/wait_queue_token/g'

and checks the end result.

Reported-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Fixes: ac6424b981 ("sched/wait: Rename wait_queue_t => wait_queue_entry_t")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2017-07-10 11:40:19 -07:00
parent 9eb7888005
commit 7cee9384cb
5 changed files with 20 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

12
Documentation/filesystems/autofs4.txt
View file

@ -316,7 +316,7 @@ For version 5, the format of the message is:
struct autofs_v5_packet {
int proto_version; /* Protocol version */
int type; /* Type of packet */
autofs_wqt_t wait_queue_entry_token;
autofs_wqt_t wait_queue_token;
__u32 dev;
__u64 ino;
__u32 uid;
@ -341,12 +341,12 @@ The pipe will be set to "packet mode" (equivalent to passing
`O_DIRECT`) to _pipe2(2)_ so that a read from the pipe will return at
most one packet, and any unread portion of a packet will be discarded.
The `wait_queue_entry_token` is a unique number which can identify a
The `wait_queue_token` is a unique number which can identify a
particular request to be acknowledged. When a message is sent over
the pipe the affected dentry is marked as either "active" or
"expiring" and other accesses to it block until the message is
acknowledged using one of the ioctls below and the relevant
`wait_queue_entry_token`.
`wait_queue_token`.
Communicating with autofs: root directory ioctls
------------------------------------------------
@ -358,7 +358,7 @@ capability, or must be the automount daemon.
The available ioctl commands are:
- **AUTOFS_IOC_READY**: a notification has been handled. The argument
to the ioctl command is the "wait_queue_entry_token" number
to the ioctl command is the "wait_queue_token" number
corresponding to the notification being acknowledged.
- **AUTOFS_IOC_FAIL**: similar to above, but indicates failure with
the error code `ENOENT`.
@ -382,14 +382,14 @@ The available ioctl commands are:
struct autofs_packet_expire_multi {
int proto_version; /* Protocol version */
int type; /* Type of packet */
autofs_wqt_t wait_queue_entry_token;
autofs_wqt_t wait_queue_token;
int len;
char name[NAME_MAX+1];
};
is required. This is filled in with the name of something
that can be unmounted or removed. If nothing can be expired,
`errno` is set to `EAGAIN`. Even though a `wait_queue_entry_token`
`errno` is set to `EAGAIN`. Even though a `wait_queue_token`
is present in the structure, no "wait queue" is established
and no acknowledgment is needed.
- **AUTOFS_IOC_EXPIRE_MULTI**: This is similar to