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SubjectRe: RFC: [2.6 patch] small IPMI cleanup
Adrian,

All these things are tools used by external modules that have not yet
made it into the mainstream kernel. Also, there are other users of
these functions that are perhaps not in the kernel yet (and perhaps
never make it into the mainstream kernel). Some of the statics do need
to be cleaned up, though.

The IPMI driver was designed so that in-kernel users can use it as
easily as userland users. So these are important parts of the interface.

-Corey

Adrian Bunk wrote:

>The patch below does the following changes to the IPMI code:
>- remove some completely unused code
>- make some needlessly global code static
>
>This inlcldes the removal of some EXPORT_SYMBOL'ed code with zero users.
>
>Is this patch OK or are in-kernel users for these functions pending?
>
>
>diffstat output:
> drivers/char/ipmi/ipmi_msghandler.c | 99 ----------------------------
> drivers/char/ipmi/ipmi_poweroff.c | 6 -
> drivers/char/ipmi/ipmi_si_intf.c | 4 -
> drivers/char/ipmi/ipmi_watchdog.c | 17 ----
> include/linux/ipmi.h | 63 -----------------
> 5 files changed, 7 insertions(+), 182 deletions(-)
>
>
>Signed-off-by: Adrian Bunk <bunk@stusta.de>
>
>--- linux-2.6.10-rc1-mm3-full/include/linux/ipmi.h.old 2004-11-06 22:09:50.000000000 +0100
>+++ linux-2.6.10-rc1-mm3-full/include/linux/ipmi.h 2004-11-06 22:10:56.000000000 +0100
>@@ -253,7 +253,6 @@
> {
> msg->done(msg);
> }
>-struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
>
> struct ipmi_user_hndl
> {
>@@ -303,32 +302,6 @@
> unsigned char ipmi_get_my_LUN(ipmi_user_t user);
>
> /*
>- * Send a command request from the given user. The address is the
>- * proper address for the channel type. If this is a command, then
>- * the message response comes back, the receive handler for this user
>- * will be called with the given msgid value in the recv msg. If this
>- * is a response to a command, then the msgid will be used as the
>- * sequence number for the response (truncated if necessary), so when
>- * sending a response you should use the sequence number you received
>- * in the msgid field of the received command. If the priority is >
>- * 0, the message will go into a high-priority queue and be sent
>- * first. Otherwise, it goes into a normal-priority queue.
>- * The user_msg_data field will be returned in any response to this
>- * message.
>- *
>- * Note that if you send a response (with the netfn lower bit set),
>- * you *will* get back a SEND_MSG response telling you what happened
>- * when the response was sent. You will not get back a response to
>- * the message itself.
>- */
>-int ipmi_request(ipmi_user_t user,
>- struct ipmi_addr *addr,
>- long msgid,
>- struct kernel_ipmi_msg *msg,
>- void *user_msg_data,
>- int priority);
>-
>-/*
> * Like ipmi_request, but lets you specify the number of retries and
> * the retry time. The retries is the number of times the message
> * will be resent if no reply is received. If set to -1, the default
>@@ -351,18 +324,6 @@
> unsigned int retry_time_ms);
>
> /*
>- * Like ipmi_request, but lets you specify the slave return address.
>- */
>-int ipmi_request_with_source(ipmi_user_t user,
>- struct ipmi_addr *addr,
>- long msgid,
>- struct kernel_ipmi_msg *msg,
>- void *user_msg_data,
>- int priority,
>- unsigned char source_address,
>- unsigned char source_lun);
>-
>-/*
> * Like ipmi_request, but with messages supplied. This will not
> * allocate any memory, and the messages may be statically allocated
> * (just make sure to do the "done" handling on them). Note that this
>@@ -381,16 +342,6 @@
> int priority);
>
> /*
>- * Do polling on the IPMI interface the user is attached to. This
>- * causes the IPMI code to do an immediate check for information from
>- * the driver and handle anything that is immediately pending. This
>- * will not block in anyway. This is useful if you need to implement
>- * polling from the user like you need to send periodic watchdog pings
>- * from a crash dump, or something like that.
>- */
>-void ipmi_poll_interface(ipmi_user_t user);
>-
>-/*
> * When commands come in to the SMS, the user can register to receive
> * them. Only one user can be listening on a specific netfn/cmd pair
> * at a time, you will get an EBUSY error if the command is already
>@@ -420,17 +371,6 @@
> int ipmi_set_gets_events(ipmi_user_t user, int val);
>
> /*
>- * Register the given user to handle all received IPMI commands. This
>- * will fail if anyone is registered as a command receiver or if
>- * another is already registered to receive all commands. NOTE THAT
>- * THIS IS FOR EMULATION USERS ONLY, DO NOT USER THIS FOR NORMAL
>- * STUFF.
>- */
>-int ipmi_register_all_cmd_rcvr(ipmi_user_t user);
>-int ipmi_unregister_all_cmd_rcvr(ipmi_user_t user);
>-
>-
>-/*
> * Called when a new SMI is registered. This will also be called on
> * every existing interface when a new watcher is registered with
> * ipmi_smi_watcher_register().
>@@ -463,9 +403,6 @@
> /* Validate that the given IPMI address is valid. */
> int ipmi_validate_addr(struct ipmi_addr *addr, int len);
>
>-/* Return 1 if the given addresses are equal, 0 if not. */
>-int ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2);
>-
> #endif /* __KERNEL__ */
>
>
>--- linux-2.6.10-rc1-mm3-full/drivers/char/ipmi/ipmi_msghandler.c.old 2004-11-06 22:11:18.000000000 +0100
>+++ linux-2.6.10-rc1-mm3-full/drivers/char/ipmi/ipmi_msghandler.c 2004-11-06 22:12:58.000000000 +0100
>@@ -49,7 +49,7 @@
> #define PFX "IPMI message handler: "
> #define IPMI_MSGHANDLER_VERSION "v33"
>
>-struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
>+static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
> static int ipmi_init_msghandler(void);
>
> static int initialized = 0;
>@@ -294,44 +294,6 @@
> unsigned int events;
> };
>
>-int
>-ipmi_register_all_cmd_rcvr(ipmi_user_t user)
>-{
>- unsigned long flags;
>- int rv = -EBUSY;
>-
>- write_lock_irqsave(&(user->intf->users_lock), flags);
>- write_lock(&(user->intf->cmd_rcvr_lock));
>- if ((user->intf->all_cmd_rcvr == NULL)
>- && (list_empty(&(user->intf->cmd_rcvrs))))
>- {
>- user->intf->all_cmd_rcvr = user;
>- rv = 0;
>- }
>- write_unlock(&(user->intf->cmd_rcvr_lock));
>- write_unlock_irqrestore(&(user->intf->users_lock), flags);
>- return rv;
>-}
>-
>-int
>-ipmi_unregister_all_cmd_rcvr(ipmi_user_t user)
>-{
>- unsigned long flags;
>- int rv = -EINVAL;
>-
>- write_lock_irqsave(&(user->intf->users_lock), flags);
>- write_lock(&(user->intf->cmd_rcvr_lock));
>- if (user->intf->all_cmd_rcvr == user)
>- {
>- user->intf->all_cmd_rcvr = NULL;
>- rv = 0;
>- }
>- write_unlock(&(user->intf->cmd_rcvr_lock));
>- write_unlock_irqrestore(&(user->intf->users_lock), flags);
>- return rv;
>-}
>-
>-
> #define MAX_IPMI_INTERFACES 4
> static ipmi_smi_t ipmi_interfaces[MAX_IPMI_INTERFACES];
>
>@@ -389,7 +351,7 @@
> up_read(&smi_watchers_sem);
> }
>
>-int
>+static int
> ipmi_addr_equal(struct ipmi_addr *addr1, struct ipmi_addr *addr2)
> {
> if (addr1->addr_type != addr2->addr_type)
>@@ -1360,26 +1322,6 @@
> return rv;
> }
>
>-int ipmi_request(ipmi_user_t user,
>- struct ipmi_addr *addr,
>- long msgid,
>- struct kernel_ipmi_msg *msg,
>- void *user_msg_data,
>- int priority)
>-{
>- return i_ipmi_request(user,
>- user->intf,
>- addr,
>- msgid,
>- msg,
>- user_msg_data,
>- NULL, NULL,
>- priority,
>- user->intf->my_address,
>- user->intf->my_lun,
>- -1, 0);
>-}
>-
> int ipmi_request_settime(ipmi_user_t user,
> struct ipmi_addr *addr,
> long msgid,
>@@ -1426,28 +1368,6 @@
> -1, 0);
> }
>
>-int ipmi_request_with_source(ipmi_user_t user,
>- struct ipmi_addr *addr,
>- long msgid,
>- struct kernel_ipmi_msg *msg,
>- void *user_msg_data,
>- int priority,
>- unsigned char source_address,
>- unsigned char source_lun)
>-{
>- return i_ipmi_request(user,
>- user->intf,
>- addr,
>- msgid,
>- msg,
>- user_msg_data,
>- NULL, NULL,
>- priority,
>- source_address,
>- source_lun,
>- -1, 0);
>-}
>-
> static int ipmb_file_read_proc(char *page, char **start, off_t off,
> int count, int *eof, void *data)
> {
>@@ -1702,14 +1622,6 @@
> return;
> }
>
>-void ipmi_poll_interface(ipmi_user_t user)
>-{
>- ipmi_smi_t intf = user->intf;
>-
>- if (intf->handlers->poll)
>- intf->handlers->poll(intf->send_info);
>-}
>-
> int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
> void *send_info,
> unsigned char version_major,
>@@ -3211,15 +3123,11 @@
> module_init(ipmi_init_msghandler_mod);
> MODULE_LICENSE("GPL");
>
>-EXPORT_SYMBOL(ipmi_alloc_recv_msg);
> EXPORT_SYMBOL(ipmi_create_user);
> EXPORT_SYMBOL(ipmi_destroy_user);
> EXPORT_SYMBOL(ipmi_get_version);
>-EXPORT_SYMBOL(ipmi_request);
> EXPORT_SYMBOL(ipmi_request_settime);
> EXPORT_SYMBOL(ipmi_request_supply_msgs);
>-EXPORT_SYMBOL(ipmi_request_with_source);
>-EXPORT_SYMBOL(ipmi_poll_interface);
> EXPORT_SYMBOL(ipmi_register_smi);
> EXPORT_SYMBOL(ipmi_unregister_smi);
> EXPORT_SYMBOL(ipmi_register_for_cmd);
>@@ -3227,12 +3135,9 @@
> EXPORT_SYMBOL(ipmi_smi_msg_received);
> EXPORT_SYMBOL(ipmi_smi_watchdog_pretimeout);
> EXPORT_SYMBOL(ipmi_alloc_smi_msg);
>-EXPORT_SYMBOL(ipmi_register_all_cmd_rcvr);
>-EXPORT_SYMBOL(ipmi_unregister_all_cmd_rcvr);
> EXPORT_SYMBOL(ipmi_addr_length);
> EXPORT_SYMBOL(ipmi_validate_addr);
> EXPORT_SYMBOL(ipmi_set_gets_events);
>-EXPORT_SYMBOL(ipmi_addr_equal);
> EXPORT_SYMBOL(ipmi_smi_watcher_register);
> EXPORT_SYMBOL(ipmi_smi_watcher_unregister);
> EXPORT_SYMBOL(ipmi_set_my_address);
>--- linux-2.6.10-rc1-mm3-full/drivers/char/ipmi/ipmi_poweroff.c.old 2004-11-06 22:14:05.000000000 +0100
>+++ linux-2.6.10-rc1-mm3-full/drivers/char/ipmi/ipmi_poweroff.c 2004-11-06 22:14:32.000000000 +0100
>@@ -45,9 +45,9 @@
> extern void (*pm_power_off)(void);
>
> /* Stuff from the get device id command. */
>-unsigned int mfg_id;
>-unsigned int prod_id;
>-unsigned char capabilities;
>+static unsigned int mfg_id;
>+static unsigned int prod_id;
>+static unsigned char capabilities;
>
> /* We use our own messages for this operation, we don't let the system
> allocate them, since we may be in a panic situation. The whole
>--- linux-2.6.10-rc1-mm3-full/drivers/char/ipmi/ipmi_si_intf.c.old 2004-11-06 22:15:03.000000000 +0100
>+++ linux-2.6.10-rc1-mm3-full/drivers/char/ipmi/ipmi_si_intf.c 2004-11-06 22:15:27.000000000 +0100
>@@ -1331,7 +1331,7 @@
> static int acpi_failure = 0;
>
> /* For GPE-type interrupts. */
>-void ipmi_acpi_gpe(void *context)
>+static void ipmi_acpi_gpe(void *context)
> {
> struct smi_info *smi_info = context;
> unsigned long flags;
>@@ -2251,7 +2251,7 @@
> }
> module_init(init_ipmi_si);
>
>-void __exit cleanup_one_si(struct smi_info *to_clean)
>+static void __exit cleanup_one_si(struct smi_info *to_clean)
> {
> int rv;
> unsigned long flags;
>--- linux-2.6.10-rc1-mm3-full/drivers/char/ipmi/ipmi_watchdog.c.old 2004-11-06 22:15:42.000000000 +0100
>+++ linux-2.6.10-rc1-mm3-full/drivers/char/ipmi/ipmi_watchdog.c 2004-11-06 22:16:04.000000000 +0100
>@@ -366,20 +366,6 @@
> }
> }
>
>-/* Do a delayed shutdown, with the delay in milliseconds. If power_off is
>- false, do a reset. If power_off is true, do a power down. This is
>- primarily for the IMB code's shutdown. */
>-void ipmi_delayed_shutdown(long delay, int power_off)
>-{
>- ipmi_ignore_heartbeat = 1;
>- if (power_off)
>- ipmi_watchdog_state = WDOG_TIMEOUT_POWER_DOWN;
>- else
>- ipmi_watchdog_state = WDOG_TIMEOUT_RESET;
>- timeout = delay;
>- ipmi_set_timeout(IPMI_SET_TIMEOUT_HB_IF_NECESSARY);
>-}
>-
> /* We use a semaphore to make sure that only one thing can send a
> heartbeat at one time, because we only have one copy of the data.
> The semaphore is claimed when the set_timeout is sent and freed
>@@ -1084,8 +1070,5 @@
> ipmi_unregister_watchdog();
> }
> module_exit(ipmi_wdog_exit);
>-
>-EXPORT_SYMBOL(ipmi_delayed_shutdown);
>-
> module_init(ipmi_wdog_init);
> MODULE_LICENSE("GPL");
>
>
>

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