linux-kernel - [PATCH, x86]: Fix movq immediate operand constraints in uaccess

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Message-ID: <4A63448B.1050208@gmail.com>
Date:	Sun, 19 Jul 2009 18:06:35 +0200
From:	Uros Bizjak <ubizjak@...il.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH, x86]: Fix movq immediate operand constraints in uaccess_64.h

Hello!

arch/x86/include/asm/uaccess_64.h uses wrong asm operand constraint 
("ir") for movq insn. Since movq sign-extends its immediate operand, 
"er" constraint should be used instead.

Attached patch changes all uses of __put_user_asm in uaccess_64.h to use 
"er" when "q" insn suffix is involved.

Patch was compile tested on x86_64 with defconfig.

Uros.

View attachment "p.diff.txt" of type "text/plain" (1476 bytes)