linux-kernel - [PATCH] x86/hyperv: Use pointer from memcpy() call for assignment in hv_crash_setup

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Message-ID: <d209991b-5aee-4222-aec3-cb662ccb7433@web.de>
Date: Fri, 31 Oct 2025 09:33:17 +0100
From: Markus Elfring <Markus.Elfring@....de>
To: linux-hyperv@...r.kernel.org, x86@...nel.org,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 Dexuan Cui <decui@...rosoft.com>, Haiyang Zhang <haiyangz@...rosoft.com>,
 "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
 "K. Y. Srinivasan" <kys@...rosoft.com>, Long Li <longli@...rosoft.com>,
 Mukesh Rathor <mrathor@...ux.microsoft.com>,
 Thomas Gleixner <tglx@...utronix.de>, Wei Liu <wei.liu@...nel.org>
Cc: LKML <linux-kernel@...r.kernel.org>, kernel-janitors@...r.kernel.org,
 Miaoqian Lin <linmq006@...il.com>
Subject: [PATCH] x86/hyperv: Use pointer from memcpy() call for assignment in
 hv_crash_setup_trampdata()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Fri, 31 Oct 2025 09:24:31 +0100

A pointer was assigned to a variable. The same pointer was used for
the destination parameter of a memcpy() call.
This function is documented in the way that the same value is returned.
Thus convert two separate statements into a direct variable assignment for
the return value from a memory copy action.

The source code was transformed by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 arch/x86/hyperv/hv_crash.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/x86/hyperv/hv_crash.c b/arch/x86/hyperv/hv_crash.c
index c0e22921ace1..745d02066308 100644
--- a/arch/x86/hyperv/hv_crash.c
+++ b/arch/x86/hyperv/hv_crash.c
@@ -464,9 +464,7 @@ static int hv_crash_setup_trampdata(u64 trampoline_va)
 		return -1;
 	}

-	dest = (void *)trampoline_va;
-	memcpy(dest, &hv_crash_asm32, size);
-
+	dest = memcpy((void *)trampoline_va, &hv_crash_asm32, size);
 	dest += size;
 	dest = (void *)round_up((ulong)dest, 16);
 	tramp = (struct hv_crash_tramp_data *)dest;
-- 
2.51.1