linux-kernel - [PATCH 4.19 053/346] x86/resctrl: Remove unused struct mbm_state::chunks

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Message-Id: <20201228124922.359620325@linuxfoundation.org>
Date:   Mon, 28 Dec 2020 13:46:12 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, James Morse <james.morse@....com>,
        Borislav Petkov <bp@...e.de>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH 4.19 053/346] x86/resctrl: Remove unused struct mbm_state::chunks_bw

From: James Morse <james.morse@....com>

commit abe8f12b44250d02937665033a8b750c1bfeb26e upstream

Nothing reads struct mbm_states's chunks_bw value, its a copy of
chunks. Remove it.

Signed-off-by: James Morse <james.morse@....com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>
Link: https://lkml.kernel.org/r/20200708163929.2783-2-james.morse@arm.com
[sudip: manual backport to file at old path]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/x86/kernel/cpu/intel_rdt.h         |    2 --
 arch/x86/kernel/cpu/intel_rdt_monitor.c |    3 +--
 2 files changed, 1 insertion(+), 4 deletions(-)

--- a/arch/x86/kernel/cpu/intel_rdt.h
+++ b/arch/x86/kernel/cpu/intel_rdt.h
@@ -251,7 +251,6 @@ struct rftype {
  * struct mbm_state - status for each MBM counter in each domain
  * @chunks:	Total data moved (multiply by rdt_group.mon_scale to get bytes)
  * @prev_msr	Value of IA32_QM_CTR for this RMID last time we read it
- * @chunks_bw	Total local data moved. Used for bandwidth calculation
  * @prev_bw_msr:Value of previous IA32_QM_CTR for bandwidth counting
  * @prev_bw	The most recent bandwidth in MBps
  * @delta_bw	Difference between the current and previous bandwidth
@@ -260,7 +259,6 @@ struct rftype {
 struct mbm_state {
 	u64	chunks;
 	u64	prev_msr;
-	u64	chunks_bw;
 	u64	prev_bw_msr;
 	u32	prev_bw;
 	u32	delta_bw;
--- a/arch/x86/kernel/cpu/intel_rdt_monitor.c
+++ b/arch/x86/kernel/cpu/intel_rdt_monitor.c
@@ -290,8 +290,7 @@ static void mbm_bw_count(u32 rmid, struc
 		return;
 
 	chunks = mbm_overflow_count(m->prev_bw_msr, tval);
-	m->chunks_bw += chunks;
-	m->chunks = m->chunks_bw;
+	m->chunks += chunks;
 	cur_bw = (chunks * r->mon_scale) >> 20;
 
 	if (m->delta_comp)