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linux/kernel/trace
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Alexey Dobriyan 9b130ad5bb treewide: make "nr_cpu_ids" unsigned 
First, number of CPUs can't be negative number.

Second, different signnnedness leads to suboptimal code in the following
cases:

1)
	kmalloc(nr_cpu_ids * sizeof(X));

"int" has to be sign extended to size_t.

2)
	while (loff_t *pos < nr_cpu_ids)

MOVSXD is 1 byte longed than the same MOV.

Other cases exist as well. Basically compiler is told that nr_cpu_ids
can't be negative which can't be deduced if it is "int".

Code savings on allyesconfig kernel: -3KB

	add/remove: 0/0 grow/shrink: 25/264 up/down: 261/-3631 (-3370)
	function                                     old     new   delta
	coretemp_cpu_online                          450     512     +62
	rcu_init_one                                1234    1272     +38
	pci_device_probe                             374     399     +25

				...

	pgdat_reclaimable_pages                      628     556     -72
	select_fallback_rq                           446     369     -77
	task_numa_find_cpu                          1923    1807    -116

Link: http://lkml.kernel.org/r/20170819114959.GA30580@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-09-08 18:26:48 -07:00
..
blktrace.c block: replace bi_bdev with a gendisk pointer and partitions index 2017-08-23 12:49:55 -06:00
bpf_trace.c bpf: fix bpf_trace_printk on 32 bit archs 2017-08-15 17:32:15 -07:00
ftrace.c ftrace: Check for null ret_stack on profile function graph entry function 2017-08-24 10:04:01 -04:00
Kconfig tracing: Rename update the enum_map file 2017-06-13 17:13:06 -04:00
Makefile perf/core: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS 2017-03-01 10:26:39 +01:00
power-traces.c cpufreq: schedutil: New governor based on scheduler utilization data 2016-04-02 01:09:12 +02:00
ring_buffer_benchmark.c ring-buffer: Have ring_buffer_alloc_read_page() return error on offline CPU 2017-08-02 14:23:02 -04:00
ring_buffer.c ring-buffer: Have ring_buffer_alloc_read_page() return error on offline CPU 2017-08-02 14:23:02 -04:00
rpm-traces.c
trace_benchmark.c tracing: Have the trace_event benchmark thread call cond_resched_rcu_qs() 2017-04-17 15:21:19 -04:00
trace_benchmark.h tracing: Have the reg function allow to fail 2016-12-09 09:13:30 -05:00
trace_branch.c tracing: Add the constant count for branch tracer 2017-01-19 08:57:41 -05:00
trace_clock.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h> 2017-03-02 08:42:27 +01:00
trace_entries.h trace: make trace_hwlat timestamp y2038 safe 2017-05-08 17:15:15 -07:00
trace_event_perf.c perf/ftrace: Fix double traces of perf on ftrace:function 2017-08-29 13:29:29 +02:00
trace_events_filter_test.h
trace_events_filter.c tracing: Fix freeing of filter in create_filter() when set_str is false 2017-08-24 10:07:38 -04:00
trace_events_hist.c sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h> 2017-03-02 08:42:38 +01:00
trace_events_trigger.c sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h> 2017-03-02 08:42:38 +01:00
trace_events.c tracing: Add support for recording tgid of tasks 2017-06-27 13:30:28 -04:00
trace_export.c
trace_functions_graph.c treewide: make "nr_cpu_ids" unsigned 2017-09-08 18:26:48 -07:00
trace_functions.c ftrace: Fix regression with module command in stack_trace_filter 2017-06-29 10:05:45 -04:00
trace_hwlat.c trace: make trace_hwlat timestamp y2038 safe 2017-05-08 17:15:15 -07:00
trace_irqsoff.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
trace_kdb.c
trace_kprobe.c perf/ftrace: Fix double traces of perf on ftrace:function 2017-08-29 13:29:29 +02:00
trace_mmiotrace.c tracing: Expose CPU physical addresses (resource values) for PCI devices 2016-06-20 09:54:22 -04:00
trace_nop.c tracing: Fix typoes in code comment and printk in trace_nop.c 2016-03-08 11:23:57 -05:00
trace_output.c tracing: Add support for display of tgid in trace output 2017-06-27 13:30:28 -04:00
trace_output.h
trace_printk.c tracing: Handle NULL formats in hold_module_trace_bprintk_format() 2016-06-20 09:46:12 -04:00
trace_probe.c tracing/probes: Fix a warning message to show correct maximum length 2017-02-15 10:32:48 -05:00
trace_probe.h perf/core: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS 2017-03-01 10:26:39 +01:00
trace_sched_switch.c tracing: Add support for recording tgid of tasks 2017-06-27 13:30:28 -04:00
trace_sched_wakeup.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
trace_selftest_dynamic.c
trace_selftest.c sched/headers: Prepare for new header dependencies before moving code to <uapi/linux/sched/types.h> 2017-03-02 08:42:27 +01:00
trace_seq.c
trace_stack.c tracing: Do note expose stack_trace_filter without DYNAMIC_FTRACE 2017-07-11 19:21:04 -04:00
trace_stat.c kernel/...: convert pr_warning to pr_warn 2016-03-22 15:36:02 -07:00
trace_stat.h
trace_syscalls.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-09-06 14:45:08 -07:00
trace_uprobe.c perf/ftrace: Fix double traces of perf on ftrace:function 2017-08-29 13:29:29 +02:00
trace.c ring-buffer: Have ring_buffer_alloc_read_page() return error on offline CPU 2017-08-02 14:23:02 -04:00
trace.h trace: fix the errors caused by incompatible type of RCU variables 2017-07-20 09:27:29 -04:00
tracing_map.c tracing: Fix kmemleak in tracing_map_array_free() 2017-08-24 10:05:51 -04:00
tracing_map.h tracing: Update some tracing_map constants and comments 2016-04-19 12:16:06 -04:00