linux-kernel - [patch] fix up smp alternatives on x86-64

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Message-ID: <44F2B557.6020403@suse.de>
Date:	Mon, 28 Aug 2006 11:20:23 +0200
From:	Gerd Hoffmann <kraxel@...e.de>
To:	linux kernel mailing list <linux-kernel@...r.kernel.org>
Cc:	Andreas Kleen <ak@...e.de>
Subject: [patch] fix up smp alternatives on x86-64

Don't use alternative_smp() in for __raw_spin_lock.  gcc
sometimes generates rip-relative addressing, so we can't
simply copy the instruction to another place.

Replace some leftover "lock;" with LOCK_PREFIX.

Fillup space with 0x90 (nop) instead of 0x42, so
"objdump -d -j .smp_altinstr_replacement vmlinux" gives more
readable results.

-- 
Gerd Hoffmann <kraxel@...e.de>
http://www.suse.de/~kraxel/julika-dora.jpeg

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