linux-kernel - [PATCH v2] hyperv: reduce size of ms_hyperv

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Date:   Fri, 22 Sep 2023 21:28:40 +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 v2] 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>
---
v2: move vtl up, as suggested by Dexuan Cui

 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..430f0ae0dde2 100644
--- a/include/asm-generic/mshyperv.h
+++ b/include/asm-generic/mshyperv.h
@@ -36,6 +36,7 @@ struct ms_hyperv_info {
 	u32 nested_features;
 	u32 max_vp_index;
 	u32 max_lp_index;
+	u8 vtl;
 	union {
 		u32 isolation_config_a;
 		struct {
@@ -54,7 +55,6 @@ struct ms_hyperv_info {
 		};
 	};
 	u64 shared_gpa_boundary;
-	u8 vtl;
 };
 extern struct ms_hyperv_info ms_hyperv;
 extern bool hv_nested;