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author | Hendrik Brueckner <brueckner@linux.vnet.ibm.com> | 2008-12-25 12:38:58 (GMT) |
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committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-25 12:39:04 (GMT) |
commit | 91d5d45ee0a8978870fd12e5c3fe394a530ec2ed (patch) | |
tree | 2849fa4ce5110341627f76ac1fe36289fff27154 /include/net/iucv/iucv.h | |
parent | 44a01d5ba8a4d543694461cd3e178cfa6b3f221b (diff) | |
download | linux-fsl-qoriq-91d5d45ee0a8978870fd12e5c3fe394a530ec2ed.tar.xz |
[S390] iucv: Locking free version of iucv_message_(receive|send)
Provide a locking free version of iucv_message_receive and iucv_message_send
that do not call local_bh_enable in a spin_lock_(bh|irqsave)() context.
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Diffstat (limited to 'include/net/iucv/iucv.h')
-rw-r--r-- | include/net/iucv/iucv.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/net/iucv/iucv.h b/include/net/iucv/iucv.h index fd70adb..5e310c8 100644 --- a/include/net/iucv/iucv.h +++ b/include/net/iucv/iucv.h @@ -337,12 +337,35 @@ int iucv_message_purge(struct iucv_path *path, struct iucv_message *msg, * established paths. This function will deal with RMDATA messages * embedded in struct iucv_message as well. * + * Locking: local_bh_enable/local_bh_disable + * * Returns the result from the CP IUCV call. */ int iucv_message_receive(struct iucv_path *path, struct iucv_message *msg, u8 flags, void *buffer, size_t size, size_t *residual); /** + * __iucv_message_receive + * @path: address of iucv path structure + * @msg: address of iucv msg structure + * @flags: flags that affect how the message is received (IUCV_IPBUFLST) + * @buffer: address of data buffer or address of struct iucv_array + * @size: length of data buffer + * @residual: + * + * This function receives messages that are being sent to you over + * established paths. This function will deal with RMDATA messages + * embedded in struct iucv_message as well. + * + * Locking: no locking. + * + * Returns the result from the CP IUCV call. + */ +int __iucv_message_receive(struct iucv_path *path, struct iucv_message *msg, + u8 flags, void *buffer, size_t size, + size_t *residual); + +/** * iucv_message_reject * @path: address of iucv path structure * @msg: address of iucv msg structure @@ -386,12 +409,34 @@ int iucv_message_reply(struct iucv_path *path, struct iucv_message *msg, * transmitted is in a buffer and this is a one-way message and the * receiver will not reply to the message. * + * Locking: local_bh_enable/local_bh_disable + * * Returns the result from the CP IUCV call. */ int iucv_message_send(struct iucv_path *path, struct iucv_message *msg, u8 flags, u32 srccls, void *buffer, size_t size); /** + * __iucv_message_send + * @path: address of iucv path structure + * @msg: address of iucv msg structure + * @flags: how the message is sent (IUCV_IPRMDATA, IUCV_IPPRTY, IUCV_IPBUFLST) + * @srccls: source class of message + * @buffer: address of data buffer or address of struct iucv_array + * @size: length of send buffer + * + * This function transmits data to another application. Data to be + * transmitted is in a buffer and this is a one-way message and the + * receiver will not reply to the message. + * + * Locking: no locking. + * + * Returns the result from the CP IUCV call. + */ +int __iucv_message_send(struct iucv_path *path, struct iucv_message *msg, + u8 flags, u32 srccls, void *buffer, size_t size); + +/** * iucv_message_send2way * @path: address of iucv path structure * @msg: address of iucv msg structure |