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[POWERPC] pseries: Avoid excess rtas_token calls
We don't need to look up the rtas event token once per cpu per second. This avoids some misc device-tree lookups and string ops and so provides some minor performance improvement. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> ---- Revised commit-log message. arch/powerpc/platforms/pseries/rtasd.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) Signed-off-by: Paul Mackerras <paulus@samba.org>
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1 changed files with 9 additions and 6 deletions
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@ -44,10 +44,13 @@ static unsigned long rtas_log_start;
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static unsigned long rtas_log_size;
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static int surveillance_timeout = -1;
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static unsigned int rtas_event_scan_rate;
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static unsigned int rtas_error_log_max;
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static unsigned int rtas_error_log_buffer_max;
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/* RTAS service tokens */
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static unsigned int event_scan;
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static unsigned int rtas_event_scan_rate;
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static int full_rtas_msgs = 0;
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extern int no_logging;
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@ -381,7 +384,7 @@ static int get_eventscan_parms(void)
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return 0;
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}
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static void do_event_scan(int event_scan)
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static void do_event_scan(void)
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{
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int error;
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do {
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@ -408,7 +411,7 @@ static void do_event_scan_all_cpus(long delay)
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cpu = first_cpu(cpu_online_map);
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for (;;) {
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set_cpus_allowed(current, cpumask_of_cpu(cpu));
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do_event_scan(rtas_token("event-scan"));
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do_event_scan();
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set_cpus_allowed(current, CPU_MASK_ALL);
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/* Drop hotplug lock, and sleep for the specified delay */
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@ -426,12 +429,11 @@ static void do_event_scan_all_cpus(long delay)
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static int rtasd(void *unused)
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{
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unsigned int err_type;
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int event_scan = rtas_token("event-scan");
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int rc;
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daemonize("rtasd");
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if (event_scan == RTAS_UNKNOWN_SERVICE || get_eventscan_parms() == -1)
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if (get_eventscan_parms() == -1)
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goto error;
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rtas_log_buf = vmalloc(rtas_error_log_buffer_max*LOG_NUMBER);
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@ -486,7 +488,8 @@ static int __init rtas_init(void)
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return 0;
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/* No RTAS */
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if (rtas_token("event-scan") == RTAS_UNKNOWN_SERVICE) {
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event_scan = rtas_token("event-scan");
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if (event_scan == RTAS_UNKNOWN_SERVICE) {
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printk(KERN_DEBUG "rtasd: no event-scan on system\n");
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return -ENODEV;
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}
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