linux-kernel - [PATCH] arm64/sme: Clearing TIF_SVE but not TIF_SME in za

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Date:   Tue, 23 Aug 2022 09:56:27 +0800
From:   Wang ShaoBo <bobo.shaobowang@...wei.com>
To:     <catalin.marinas@....com>
CC:     <weiyongjun1@...wei.com>, <guohanjun@...wei.com>,
        <broonie@...nel.org>, <oleg@...hat.com>, <will@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] arm64/sme: Clearing TIF_SVE but not TIF_SME in za_set()

Clearing target's TIF_SVE but not current's TIF_SME in za_set(), as it indicates
target's SVE storage unavailable.

Fixes: 776b4a1cf364 ("arm64/sme: Add ptrace support for ZA")
Signed-off-by: Wang ShaoBo <bobo.shaobowang@...wei.com>
---
 arch/arm64/kernel/ptrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index 21da83187a60..66d5c7efb745 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -1084,7 +1084,7 @@ static int za_set(struct task_struct *target,
 	if (!target->thread.sve_state) {
 		sve_alloc(target);
 		if (!target->thread.sve_state) {
-			clear_thread_flag(TIF_SME);
+			clear_tsk_thread_flag(target, TIF_SVE);
 			ret = -ENOMEM;
 			goto out;
 		}
-- 
2.25.1