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From:   Michal Suchanek <msuchanek@suse.de>
To:     linuxppc-dev@lists.ozlabs.org,
        Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Cc:     Michal Suchanek <msuchanek@suse.de>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Christophe Leroy <christophe.leroy@c-s.fr>,
        Mathieu Malaterre <malat@debian.org>,
        Russell Currey <ruscur@russell.cc>,
        Anton Blanchard <anton@samba.org>, linux-kernel@vger.kernel.org
Subject: [PATCH] Revert "powerpc: Add barrier_nospec to raw_copy_in_user()"
Date:   Mon,  2 Sep 2019 10:47:26 +0200
Message-Id: <20190902084726.14515-1-msuchanek@suse.de>
In-Reply-To: <20190821153656.57fabe9c@kitsune.suse.cz>
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This reverts commit 6fbcdd59094ade30db63f32316e9502425d7b256.

Not needed. Data handled by raw_copy_in_user must be loaded through
copy_from_user to be used in the kernel which already has the barrier.

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
---
 arch/powerpc/include/asm/uaccess.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h
index 8b03eb44e876..76f34346b642 100644
--- a/arch/powerpc/include/asm/uaccess.h
+++ b/arch/powerpc/include/asm/uaccess.h
@@ -312,7 +312,6 @@ raw_copy_in_user(void __user *to, const void __user *from, unsigned long n)
 {
 	unsigned long ret;
 
-	barrier_nospec();
 	allow_user_access(to, from, n);
 	ret = __copy_tofrom_user(to, from, n);
 	prevent_user_access(to, from, n);
-- 
2.22.0