From: David Mosberger-Tang <davidm@hpl.hp.com>
Date: Mon, 25 Apr 2005 20:03:16 +0000 (-0700)
Subject: [IA64] speed up syscall path a bit more
X-Git-Tag: v2.6.12-rc4~197^2~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=30325d17715302a60c9afdaacaafaeb056b7e880;p=pandora-kernel.git

[IA64] speed up syscall path a bit more

Recently I noticed that clearing ar.ssd/ar.csd right before srlz.d is
causing significant stalling in the syscall path.  The patch below
fixes that by moving the register-writes after srlz.d.  On a Madison,
this drops break-based getpid() from 241 to 226 cycles (-15 cycles).

Signed-off-by: David Mosberger-Tang <davidm@hpl.hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---

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