ca295ffb91
It is all well described by Stephen Rothwell who initially spotted that:
----------------------------->8----------------------------
After merging the origin tree, today's linux-next build (arc
haps_hs_smp_defconfig+kselftest) produced these warnings:
arch/arc/include/asm/perf_event.h:126:27: warning: 'arc_pmu_cache_map' defined but not used [-Wunused-const-variable=]
arch/arc/include/asm/perf_event.h:91:27: warning: 'arc_pmu_ev_hw_map' defined but not used [-Wunused-const-variable=]
Introduced by commit 0dd450fe13da ("ARC: Add perf support for ARC700 cores")
The 2 static arrays should be moved into arch/arc/kernel/perf_event.c
(the only place that uses them). We get the warning because perf_event.h
is also included by arch/arc/kernel/unaligned.c.
----------------------------->8----------------------------
Could be easily reproduced by running make with "W=1" on any up-to-date
sources, when extra warnings get enabled (in particular
"-Wunused-const-variable"), otherwise disabled by default in the top-level
Makefile as "These warnings generated too much noise in a regular build".
Cc: Mischa Jonker <mjonker@synopsys.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Linux performance counter support for ARC
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*
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* Copyright (C) 2014-2015 Synopsys, Inc. (www.synopsys.com)
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* Copyright (C) 2011-2013 Synopsys, Inc. (www.synopsys.com)
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*/
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#ifndef __ASM_PERF_EVENT_H
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#define __ASM_PERF_EVENT_H
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/* Max number of counters that PCT block may ever have */
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#define ARC_PERF_MAX_COUNTERS 32
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#define ARC_REG_CC_BUILD 0xF6
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#define ARC_REG_CC_INDEX 0x240
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#define ARC_REG_CC_NAME0 0x241
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#define ARC_REG_CC_NAME1 0x242
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#define ARC_REG_PCT_BUILD 0xF5
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#define ARC_REG_PCT_COUNTL 0x250
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#define ARC_REG_PCT_COUNTH 0x251
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#define ARC_REG_PCT_SNAPL 0x252
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#define ARC_REG_PCT_SNAPH 0x253
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#define ARC_REG_PCT_CONFIG 0x254
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#define ARC_REG_PCT_CONTROL 0x255
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#define ARC_REG_PCT_INDEX 0x256
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#define ARC_REG_PCT_INT_CNTL 0x25C
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#define ARC_REG_PCT_INT_CNTH 0x25D
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#define ARC_REG_PCT_INT_CTRL 0x25E
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#define ARC_REG_PCT_INT_ACT 0x25F
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#define ARC_REG_PCT_CONFIG_USER (1 << 18) /* count in user mode */
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#define ARC_REG_PCT_CONFIG_KERN (1 << 19) /* count in kernel mode */
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#define ARC_REG_PCT_CONTROL_CC (1 << 16) /* clear counts */
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#define ARC_REG_PCT_CONTROL_SN (1 << 17) /* snapshot */
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struct arc_reg_pct_build {
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#ifdef CONFIG_CPU_BIG_ENDIAN
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unsigned int m:8, c:8, r:5, i:1, s:2, v:8;
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#else
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unsigned int v:8, s:2, i:1, r:5, c:8, m:8;
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#endif
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};
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struct arc_reg_cc_build {
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#ifdef CONFIG_CPU_BIG_ENDIAN
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unsigned int c:16, r:8, v:8;
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#else
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unsigned int v:8, r:8, c:16;
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#endif
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};
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#define PERF_COUNT_ARC_DCLM (PERF_COUNT_HW_MAX + 0)
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#define PERF_COUNT_ARC_DCSM (PERF_COUNT_HW_MAX + 1)
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#define PERF_COUNT_ARC_ICM (PERF_COUNT_HW_MAX + 2)
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#define PERF_COUNT_ARC_BPOK (PERF_COUNT_HW_MAX + 3)
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#define PERF_COUNT_ARC_EDTLB (PERF_COUNT_HW_MAX + 4)
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#define PERF_COUNT_ARC_EITLB (PERF_COUNT_HW_MAX + 5)
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#define PERF_COUNT_ARC_LDC (PERF_COUNT_HW_MAX + 6)
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#define PERF_COUNT_ARC_STC (PERF_COUNT_HW_MAX + 7)
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#define PERF_COUNT_ARC_HW_MAX (PERF_COUNT_HW_MAX + 8)
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#endif /* __ASM_PERF_EVENT_H */
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