The patch titled ipmi: convert locked counters to atomics in the system interface has been removed from the -mm tree. Its filename was ipmi-convert-locked-counters-to-atomics-in-the-system-interface.patch This patch was dropped because it was withdrawn The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: ipmi: convert locked counters to atomics in the system interface From: Corey Minyard <cminyard@xxxxxxxxxx> Atomics are faster and neater than locked counters. Signed-off-by: Corey Minyard <cminyard@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/char/ipmi/ipmi_si_intf.c | 131 ++++++++++++----------------- 1 file changed, 57 insertions(+), 74 deletions(-) diff -puN drivers/char/ipmi/ipmi_si_intf.c~ipmi-convert-locked-counters-to-atomics-in-the-system-interface drivers/char/ipmi/ipmi_si_intf.c --- a/drivers/char/ipmi/ipmi_si_intf.c~ipmi-convert-locked-counters-to-atomics-in-the-system-interface +++ a/drivers/char/ipmi/ipmi_si_intf.c @@ -120,6 +120,22 @@ static struct device_driver ipmi_driver .bus = &platform_bus_type }; +struct smi_stats +{ + atomic_t short_timeouts; + atomic_t long_timeouts; + atomic_t timeout_restarts; + atomic_t idles; + atomic_t interrupts; + atomic_t attentions; + atomic_t flag_fetches; + atomic_t hosed_count; + atomic_t complete_transactions; + atomic_t events; + atomic_t watchdog_pretimeouts; + atomic_t incoming_messages; +}; + struct smi_info { int intf_num; @@ -216,25 +232,17 @@ struct smi_info unsigned char slave_addr; /* Counters and things for the proc filesystem. */ - spinlock_t count_lock; - unsigned long short_timeouts; - unsigned long long_timeouts; - unsigned long timeout_restarts; - unsigned long idles; - unsigned long interrupts; - unsigned long attentions; - unsigned long flag_fetches; - unsigned long hosed_count; - unsigned long complete_transactions; - unsigned long events; - unsigned long watchdog_pretimeouts; - unsigned long incoming_messages; + struct smi_stats stats; struct task_struct *thread; struct list_head link; }; +#define smi_inc_stat(smi, stat) atomic_inc(&(smi)->stats.stat) +#define smi_get_stat(smi, stat) \ + ((unsigned int) atomic_read(&smi->stats.stat)) + #define SI_MAX_PARMS 4 static int force_kipmid[SI_MAX_PARMS]; @@ -398,9 +406,7 @@ static void handle_flags(struct smi_info retry: if (smi_info->msg_flags & WDT_PRE_TIMEOUT_INT) { /* Watchdog pre-timeout */ - spin_lock(&smi_info->count_lock); - smi_info->watchdog_pretimeouts++; - spin_unlock(&smi_info->count_lock); + smi_inc_stat(smi_info, watchdog_pretimeouts); start_clear_flags(smi_info); smi_info->msg_flags &= ~WDT_PRE_TIMEOUT_INT; @@ -545,9 +551,7 @@ static void handle_transaction_done(stru smi_info->msg_flags &= ~EVENT_MSG_BUFFER_FULL; handle_flags(smi_info); } else { - spin_lock(&smi_info->count_lock); - smi_info->events++; - spin_unlock(&smi_info->count_lock); + smi_inc_stat(smi_info, events); /* Do this before we deliver the message because delivering the message releases the @@ -581,9 +585,7 @@ static void handle_transaction_done(stru smi_info->msg_flags &= ~RECEIVE_MSG_AVAIL; handle_flags(smi_info); } else { - spin_lock(&smi_info->count_lock); - smi_info->incoming_messages++; - spin_unlock(&smi_info->count_lock); + smi_inc_stat(smi_info, incoming_messages); /* Do this before we deliver the message because delivering the message releases the @@ -700,18 +702,14 @@ static enum si_sm_result smi_event_handl if (si_sm_result == SI_SM_TRANSACTION_COMPLETE) { - spin_lock(&smi_info->count_lock); - smi_info->complete_transactions++; - spin_unlock(&smi_info->count_lock); + smi_inc_stat(smi_info, complete_transactions); handle_transaction_done(smi_info); si_sm_result = smi_info->handlers->event(smi_info->si_sm, 0); } else if (si_sm_result == SI_SM_HOSED) { - spin_lock(&smi_info->count_lock); - smi_info->hosed_count++; - spin_unlock(&smi_info->count_lock); + smi_inc_stat(smi_info, hosed_count); /* Do the before return_hosed_msg, because that releases the lock. */ @@ -733,9 +731,7 @@ static enum si_sm_result smi_event_handl { unsigned char msg[2]; - spin_lock(&smi_info->count_lock); - smi_info->attentions++; - spin_unlock(&smi_info->count_lock); + smi_inc_stat(smi_info, attentions); /* Got a attn, send down a get message flags to see what's causing it. It would be better to handle @@ -753,9 +749,7 @@ static enum si_sm_result smi_event_handl /* If we are currently idle, try to start the next message. */ if (si_sm_result == SI_SM_IDLE) { - spin_lock(&smi_info->count_lock); - smi_info->idles++; - spin_unlock(&smi_info->count_lock); + smi_inc_stat(smi_info, idles); si_sm_result = start_next_msg(smi_info); if (si_sm_result != SI_SM_IDLE) @@ -945,23 +939,17 @@ static void smi_timeout(unsigned long da if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { /* Running with interrupts, only do long timeouts. */ smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; - spin_lock_irqsave(&smi_info->count_lock, flags); - smi_info->long_timeouts++; - spin_unlock_irqrestore(&smi_info->count_lock, flags); + smi_inc_stat(smi_info, long_timeouts); goto do_add_timer; } /* If the state machine asks for a short delay, then shorten the timer timeout. */ if (smi_result == SI_SM_CALL_WITH_DELAY) { - spin_lock_irqsave(&smi_info->count_lock, flags); - smi_info->short_timeouts++; - spin_unlock_irqrestore(&smi_info->count_lock, flags); + smi_inc_stat(smi_info, short_timeouts); smi_info->si_timer.expires = jiffies + 1; } else { - spin_lock_irqsave(&smi_info->count_lock, flags); - smi_info->long_timeouts++; - spin_unlock_irqrestore(&smi_info->count_lock, flags); + smi_inc_stat(smi_info, long_timeouts); smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; } @@ -979,9 +967,7 @@ static irqreturn_t si_irq_handler(int ir spin_lock_irqsave(&(smi_info->si_lock), flags); - spin_lock(&smi_info->count_lock); - smi_info->interrupts++; - spin_unlock(&smi_info->count_lock); + smi_inc_stat(smi_info, interrupts); #ifdef DEBUG_TIMING do_gettimeofday(&t); @@ -1765,9 +1751,7 @@ static u32 ipmi_acpi_gpe(void *context) spin_lock_irqsave(&(smi_info->si_lock), flags); - spin_lock(&smi_info->count_lock); - smi_info->interrupts++; - spin_unlock(&smi_info->count_lock); + smi_inc_stat(smi_info, interrupts); #ifdef DEBUG_TIMING do_gettimeofday(&t); @@ -2405,30 +2389,30 @@ static int stat_file_read_proc(char *pag out += sprintf(out, "interrupts_enabled: %d\n", smi->irq && !smi->interrupt_disabled); - out += sprintf(out, "short_timeouts: %ld\n", - smi->short_timeouts); - out += sprintf(out, "long_timeouts: %ld\n", - smi->long_timeouts); - out += sprintf(out, "timeout_restarts: %ld\n", - smi->timeout_restarts); - out += sprintf(out, "idles: %ld\n", - smi->idles); - out += sprintf(out, "interrupts: %ld\n", - smi->interrupts); - out += sprintf(out, "attentions: %ld\n", - smi->attentions); - out += sprintf(out, "flag_fetches: %ld\n", - smi->flag_fetches); - out += sprintf(out, "hosed_count: %ld\n", - smi->hosed_count); - out += sprintf(out, "complete_transactions: %ld\n", - smi->complete_transactions); - out += sprintf(out, "events: %ld\n", - smi->events); - out += sprintf(out, "watchdog_pretimeouts: %ld\n", - smi->watchdog_pretimeouts); - out += sprintf(out, "incoming_messages: %ld\n", - smi->incoming_messages); + out += sprintf(out, "short_timeouts: %u\n", + smi_get_stat(smi, short_timeouts)); + out += sprintf(out, "long_timeouts: %u\n", + smi_get_stat(smi, long_timeouts)); + out += sprintf(out, "timeout_restarts: %u\n", + smi_get_stat(smi, timeout_restarts)); + out += sprintf(out, "idles: %u\n", + smi_get_stat(smi, idles)); + out += sprintf(out, "interrupts: %u\n", + smi_get_stat(smi, interrupts)); + out += sprintf(out, "attentions: %u\n", + smi_get_stat(smi, attentions)); + out += sprintf(out, "flag_fetches: %u\n", + smi_get_stat(smi, flag_fetches)); + out += sprintf(out, "hosed_count: %u\n", + smi_get_stat(smi, hosed_count)); + out += sprintf(out, "complete_transactions: %u\n", + smi_get_stat(smi, complete_transactions)); + out += sprintf(out, "events: %u\n", + smi_get_stat(smi, events)); + out += sprintf(out, "watchdog_pretimeouts: %u\n", + smi_get_stat(smi, watchdog_pretimeouts)); + out += sprintf(out, "incoming_messages: %u\n", + smi_get_stat(smi, incoming_messages)); return out - page; } @@ -2738,7 +2722,6 @@ static int try_smi_init(struct smi_info spin_lock_init(&(new_smi->si_lock)); spin_lock_init(&(new_smi->msg_lock)); - spin_lock_init(&(new_smi->count_lock)); /* Do low-level detection first. */ if (new_smi->handlers->detect(new_smi->si_sm)) { _ Patches currently in -mm which might be from cminyard@xxxxxxxxxx are git-watchdog.patch ipmi-hold-attn-until-upper-layer-ready.patch ipmi-change-device-node-ordering-to-reflect-probe-order.patch ipmi-run-to-completion-fixes.patch ipmi-run-to-completion-fixes-checkpatch-fixes.patch ipmi-dont-grab-locks-in-run-to-completion-mode.patch ipmi-dont-print-event-queue-full-on-every-event.patch ipmi-update-driver-version.patch ipmi-convert-locked-counters-to-atomics-in-the-system-interface.patch ipmi-convert-locked-counters-to-atomics-in-the-system-interface-checkpatch-fixes.patch - To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html