linux-kernel - [tip: ras/core] x86/mce/amd: Remove redundant reset

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <175758653247.709179.17436625388312555748.tip-bot2@tip-bot2>
Date: Thu, 11 Sep 2025 10:28:52 -0000
From: "tip-bot2 for Yazen Ghannam" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Yazen Ghannam <yazen.ghannam@....com>,
 "Borislav Petkov (AMD)" <bp@...en8.de>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: ras/core] x86/mce/amd: Remove redundant reset_block()

The following commit has been merged into the ras/core branch of tip:

Commit-ID:     922300abd79d9eac241a531579db3b5dfb2dd1a9
Gitweb:        https://git.kernel.org/tip/922300abd79d9eac241a531579db3b5dfb2dd1a9
Author:        Yazen Ghannam <yazen.ghannam@....com>
AuthorDate:    Mon, 08 Sep 2025 15:40:41 
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Thu, 11 Sep 2025 12:23:48 +02:00

x86/mce/amd: Remove redundant reset_block()

Many of the checks in reset_block() are done again in the block restart
function. So drop former.

  [ bp: Fixup commit message. ]

Signed-off-by: Yazen Ghannam <yazen.ghannam@....com>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Link: https://lore.kernel.org/20250908-wip-mca-updates-v6-0-eef5d6c74b9c@amd.com
---
 arch/x86/kernel/cpu/mce/amd.c | 28 +++++++---------------------
 1 file changed, 7 insertions(+), 21 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c
index 3426894..9ca4079 100644
--- a/arch/x86/kernel/cpu/mce/amd.c
+++ b/arch/x86/kernel/cpu/mce/amd.c
@@ -812,29 +812,11 @@ static void amd_deferred_error_interrupt(void)
 	machine_check_poll(MCP_TIMESTAMP, &this_cpu_ptr(&mce_amd_data)->dfr_intr_banks);
 }
 
-static void reset_block(struct threshold_block *block)
-{
-	struct thresh_restart tr;
-	u32 low = 0, high = 0;
-
-	if (!block)
-		return;
-
-	if (rdmsr_safe(block->address, &low, &high))
-		return;
-
-	if (!(high & MASK_OVERFLOW_HI))
-		return;
-
-	memset(&tr, 0, sizeof(tr));
-	tr.b = block;
-	threshold_restart_block(&tr);
-}
-
 static void amd_reset_thr_limit(unsigned int bank)
 {
 	struct threshold_bank **bp = this_cpu_read(threshold_banks);
 	struct threshold_block *block, *tmp;
+	struct thresh_restart tr;
 
 	/*
 	 * Validate that the threshold bank has been initialized already. The
@@ -844,8 +826,12 @@ static void amd_reset_thr_limit(unsigned int bank)
 	if (!bp || !bp[bank])
 		return;
 
-	list_for_each_entry_safe(block, tmp, &bp[bank]->miscj, miscj)
-		reset_block(block);
+	memset(&tr, 0, sizeof(tr));
+
+	list_for_each_entry_safe(block, tmp, &bp[bank]->miscj, miscj) {
+		tr.b = block;
+		threshold_restart_block(&tr);
+	}
 }
 
 /*