linux-kernel - [PATCH 2/4] arm64/signal: Alloc tpidr2 sigframe after checking system_supports

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Message-ID: <20230317124915.1263-3-sundongxu3@huawei.com>
Date:   Fri, 17 Mar 2023 20:49:13 +0800
From:   Dongxu Sun <sundongxu3@...wei.com>
To:     <catalin.marinas@....com>, <will@...nel.org>, <broonie@...nel.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <wanghaibin.wang@...wei.com>,
        Dongxu Sun <sundongxu3@...wei.com>
Subject: [PATCH 2/4] arm64/signal: Alloc tpidr2 sigframe after checking system_supports_tpidr2()

Move tpidr2 sigframe allocation from under the checking of
system_supports_sme() to the checking of system_supports_tpidr2().

Signed-off-by: Dongxu Sun <sundongxu3@...wei.com>
---
 arch/arm64/kernel/signal.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c
index 032e97f8cae0..2cfc810d0a5b 100644
--- a/arch/arm64/kernel/signal.c
+++ b/arch/arm64/kernel/signal.c
@@ -893,6 +893,13 @@ static int setup_sigframe_layout(struct rt_sigframe_user_layout *user,
 			return err;
 	}
 
+	if (system_supports_tpidr2()) {
+		err = sigframe_alloc(user, &user->tpidr2_offset,
+				     sizeof(struct tpidr2_context));
+		if (err)
+			return err;
+	}
+
 	if (system_supports_sme()) {
 		unsigned int vl;
 		unsigned int vq = 0;
@@ -902,11 +909,6 @@ static int setup_sigframe_layout(struct rt_sigframe_user_layout *user,
 		else
 			vl = task_get_sme_vl(current);
 
-		err = sigframe_alloc(user, &user->tpidr2_offset,
-				     sizeof(struct tpidr2_context));
-		if (err)
-			return err;
-
 		if (thread_za_enabled(&current->thread))
 			vq = sve_vq_from_vl(vl);
 
-- 
2.33.0