linux-kernel - [tip: x86/cpu] x86/cacheinfo: Properly name amd

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <174289539420.14745.12025478199109562353.tip-bot2@tip-bot2>
Date: Tue, 25 Mar 2025 09:36:34 -0000
From: "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Thomas Gleixner <tglx@...utronix.de>,
 "Ahmed S. Darwish" <darwi@...utronix.de>, Ingo Molnar <mingo@...nel.org>,
 "H. Peter Anvin" <hpa@...or.com>,
 Linus Torvalds <torvalds@...ux-foundation.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject:
 [tip: x86/cpu] x86/cacheinfo: Properly name amd_cpuid4()'s first parameter

The following commit has been merged into the x86/cpu branch of tip:

Commit-ID:     21e2a452dca34538db0731b45c113cfd31aa45e6
Gitweb:        https://git.kernel.org/tip/21e2a452dca34538db0731b45c113cfd31aa45e6
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Mon, 24 Mar 2025 14:33:01 +01:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Tue, 25 Mar 2025 10:22:16 +01:00

x86/cacheinfo: Properly name amd_cpuid4()'s first parameter

amd_cpuid4()'s first parameter, "leaf", is not a CPUID leaf as the name
implies.  Rather, it's an index emulating CPUID(4)'s subleaf semantics;
i.e. an ID for the cache object currently enumerated.  Rename that
parameter to "index".

Apply minor coding style fixes to the rest of the function as well.

[ darwi: Move into a separate commit and write commit log.
	 Use "index" instead of "subleaf" for amd_cpuid4() first param,
	 as that's the name typically used at the whole of cacheinfo.c. ]

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Ahmed S. Darwish <darwi@...utronix.de>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Link: https://lore.kernel.org/r/20250324133324.23458-7-darwi@linutronix.de
---
 arch/x86/kernel/cpu/cacheinfo.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/arch/x86/kernel/cpu/cacheinfo.c b/arch/x86/kernel/cpu/cacheinfo.c
index d0bfdb8..0fd4e96 100644
--- a/arch/x86/kernel/cpu/cacheinfo.c
+++ b/arch/x86/kernel/cpu/cacheinfo.c
@@ -233,12 +233,10 @@ static const enum cache_type cache_type_map[] = {
 };
 
 static void
-amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
-		     union _cpuid4_leaf_ebx *ebx,
-		     union _cpuid4_leaf_ecx *ecx)
+amd_cpuid4(int index, union _cpuid4_leaf_eax *eax,
+	   union _cpuid4_leaf_ebx *ebx, union _cpuid4_leaf_ecx *ecx)
 {
-	unsigned dummy;
-	unsigned line_size, lines_per_tag, assoc, size_in_kb;
+	unsigned int dummy, line_size, lines_per_tag, assoc, size_in_kb;
 	union l1_cache l1i, l1d;
 	union l2_cache l2;
 	union l3_cache l3;
@@ -251,7 +249,7 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
 	cpuid(0x80000005, &dummy, &dummy, &l1d.val, &l1i.val);
 	cpuid(0x80000006, &dummy, &dummy, &l2.val, &l3.val);
 
-	switch (leaf) {
+	switch (index) {
 	case 1:
 		l1 = &l1i;
 		fallthrough;
@@ -289,12 +287,11 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
 	}
 
 	eax->split.is_self_initializing = 1;
-	eax->split.type = types[leaf];
-	eax->split.level = levels[leaf];
+	eax->split.type = types[index];
+	eax->split.level = levels[index];
 	eax->split.num_threads_sharing = 0;
 	eax->split.num_cores_on_die = topology_num_cores_per_package();
 
-
 	if (assoc == 0xffff)
 		eax->split.is_fully_associative = 1;
 	ebx->split.coherency_line_size = line_size - 1;