threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
/*
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* Copyright (C) 2020 MediaTek Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/types.h>
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#include <linux/tracepoint.h>
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#include <linux/tracepoint-defs.h>
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#include <linux/string.h>
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#include "apu_tp.h"
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#define apu_tp_foreach(tbl, t) \
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for ((t) = (tbl); (t)->name != NULL; (t)++)
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static void apu_tp_lookup(struct tracepoint *tp, void *priv)
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{
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struct apu_tp_tbl *t, *tbl;
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tbl = (struct apu_tp_tbl *)priv;
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apu_tp_foreach(tbl, t) {
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if (!strcmp(t->name, tp->name))
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t->tp = tp;
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}
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}
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/**
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* apu_tp_exit() - Release trace point table
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*
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* @apu_tp_tbl: trace point table
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*
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* Unregister all trace points listed in the given table from kernel.
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* Note: The last entry of the table must be "APU_TP_TBL_END".
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*/
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void apu_tp_exit(struct apu_tp_tbl *tbl)
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{
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struct apu_tp_tbl *t;
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apu_tp_foreach(tbl, t) {
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if (!t->tp)
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continue;
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tracepoint_probe_unregister(t->tp, t->func, NULL);
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t->registered = false;
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}
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}
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/**
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* apu_tp_init() - Initialize trace point table
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*
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* @apu_tp_tbl: trace point table
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*
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* Register all trace points listed in the given table to kernel.
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* Note: The last entry of the table must be "APU_TP_TBL_END".
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*/
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int apu_tp_init(struct apu_tp_tbl *tbl)
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{
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struct apu_tp_tbl *t;
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/* install tracepoints */
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for_each_kernel_tracepoint(apu_tp_lookup, tbl);
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apu_tp_foreach(tbl, t) {
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if (!t->tp) {
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pr_info("%s: %s was not found\n", __func__, t->name);
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apu_tp_exit(tbl); /* free registered entries */
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return -EINVAL;
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}
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tracepoint_probe_register(t->tp, t->func, NULL);
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t->registered = true;
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}
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return 0;
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}
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