linux-kernel - [PATCH v1] hyperv: reduce size of ms_hyperv

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-next>] [day] [month] [year] [list]

Message-Id: <20230918160141.23465-1-olaf@aepfle.de>
Date:   Mon, 18 Sep 2023 18:01:40 +0200
From:   Olaf Hering <olaf@...fle.de>
To:     linux-hyperv@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH v1] hyperv: reduce size of ms_hyperv_info

Use the hole prior shared_gpa_boundary to store the result of get_vtl.
This reduces the size by 8 bytes.

Signed-off-by: Olaf Hering <olaf@...fle.de>
---
 include/asm-generic/mshyperv.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
index cecd2b7bd033..bdee5fbaaf40 100644
--- a/include/asm-generic/mshyperv.h
+++ b/include/asm-generic/mshyperv.h
@@ -53,8 +53,8 @@ struct ms_hyperv_info {
 			u32 reserved_b2 : 20;
 		};
 	};
-	u64 shared_gpa_boundary;
 	u8 vtl;
+	u64 shared_gpa_boundary;
 };
 extern struct ms_hyperv_info ms_hyperv;
 extern bool hv_nested;