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https://github.com/edk2-porting/linux-next.git
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b3e9f672b6
This patch updates percpu related symbols in oprofile such that percpu symbols are unique and don't clash with local symbols. This serves two purposes of decreasing the possibility of global percpu symbol collision and allowing dropping per_cpu__ prefix from percpu symbols. * drivers/oprofile/cpu_buffer.c: s/cpu_buffer/op_cpu_buffer/ Partly based on Rusty Russell's "alloc_percpu: rename percpu vars which cause name clashes" patch. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Robert Richter <robert.richter@amd.com> Cc: Rusty Russell <rusty@rustcorp.com.au>
85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/**
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* @file oprofile_stats.c
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*
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* @remark Copyright 2002 OProfile authors
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* @remark Read the file COPYING
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*
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* @author John Levon
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*/
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#include <linux/oprofile.h>
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#include <linux/smp.h>
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#include <linux/cpumask.h>
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#include <linux/threads.h>
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#include "oprofile_stats.h"
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#include "cpu_buffer.h"
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struct oprofile_stat_struct oprofile_stats;
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void oprofile_reset_stats(void)
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{
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struct oprofile_cpu_buffer *cpu_buf;
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int i;
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for_each_possible_cpu(i) {
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cpu_buf = &per_cpu(op_cpu_buffer, i);
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cpu_buf->sample_received = 0;
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cpu_buf->sample_lost_overflow = 0;
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cpu_buf->backtrace_aborted = 0;
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cpu_buf->sample_invalid_eip = 0;
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}
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atomic_set(&oprofile_stats.sample_lost_no_mm, 0);
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atomic_set(&oprofile_stats.sample_lost_no_mapping, 0);
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atomic_set(&oprofile_stats.event_lost_overflow, 0);
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atomic_set(&oprofile_stats.bt_lost_no_mapping, 0);
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atomic_set(&oprofile_stats.multiplex_counter, 0);
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}
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void oprofile_create_stats_files(struct super_block *sb, struct dentry *root)
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{
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struct oprofile_cpu_buffer *cpu_buf;
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struct dentry *cpudir;
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struct dentry *dir;
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char buf[10];
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int i;
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dir = oprofilefs_mkdir(sb, root, "stats");
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if (!dir)
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return;
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for_each_possible_cpu(i) {
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cpu_buf = &per_cpu(op_cpu_buffer, i);
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snprintf(buf, 10, "cpu%d", i);
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cpudir = oprofilefs_mkdir(sb, dir, buf);
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/* Strictly speaking access to these ulongs is racy,
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* but we can't simply lock them, and they are
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* informational only.
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*/
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oprofilefs_create_ro_ulong(sb, cpudir, "sample_received",
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&cpu_buf->sample_received);
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oprofilefs_create_ro_ulong(sb, cpudir, "sample_lost_overflow",
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&cpu_buf->sample_lost_overflow);
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oprofilefs_create_ro_ulong(sb, cpudir, "backtrace_aborted",
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&cpu_buf->backtrace_aborted);
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oprofilefs_create_ro_ulong(sb, cpudir, "sample_invalid_eip",
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&cpu_buf->sample_invalid_eip);
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}
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oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mm",
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&oprofile_stats.sample_lost_no_mm);
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oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mapping",
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&oprofile_stats.sample_lost_no_mapping);
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oprofilefs_create_ro_atomic(sb, dir, "event_lost_overflow",
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&oprofile_stats.event_lost_overflow);
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oprofilefs_create_ro_atomic(sb, dir, "bt_lost_no_mapping",
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&oprofile_stats.bt_lost_no_mapping);
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#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
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oprofilefs_create_ro_atomic(sb, dir, "multiplex_counter",
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&oprofile_stats.multiplex_counter);
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#endif
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}
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