linux-kernel - [PATCH] xtensa: ptrace: Remove zero-length alignment array

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Message-ID: <20250219114759.20110-2-thorsten.blum@linux.dev>
Date: Wed, 19 Feb 2025 12:48:00 +0100
From: Thorsten Blum <thorsten.blum@...ux.dev>
To: Oleg Nesterov <oleg@...hat.com>,
	Chris Zankel <chris@...kel.net>,
	Max Filippov <jcmvbkbc@...il.com>
Cc: Thorsten Blum <thorsten.blum@...ux.dev>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] xtensa: ptrace: Remove zero-length alignment array

Use a compiler attribute to align the areg field to 16 bytes instead of
using a zero-length alignment array.

Signed-off-by: Thorsten Blum <thorsten.blum@...ux.dev>
---
 arch/xtensa/include/asm/ptrace.h | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/xtensa/include/asm/ptrace.h b/arch/xtensa/include/asm/ptrace.h
index 86c70117371b..4871e5a4d6fb 100644
--- a/arch/xtensa/include/asm/ptrace.h
+++ b/arch/xtensa/include/asm/ptrace.h
@@ -72,13 +72,10 @@ struct pt_regs {
 	/* Additional configurable registers that are used by the compiler. */
 	xtregs_opt_t xtregs_opt;
 
-	/* Make sure the areg field is 16 bytes aligned. */
-	int align[0] __attribute__ ((aligned(16)));
-
 	/* current register frame.
 	 * Note: The ESF for kernel exceptions ends after 16 registers!
 	 */
-	unsigned long areg[XCHAL_NUM_AREGS];
+	unsigned long areg[XCHAL_NUM_AREGS] __aligned(16);
 };
 
 # define arch_has_single_step()	(1)
-- 
2.48.1