From: David Mosberger-Tang <davidm@hpl.hp.com>
Date: Thu, 28 Apr 2005 04:16:07 +0000 (-0700)
Subject: [IA64] On return from syscall, hint b7 with __kernel_syscall_via_epc().
X-Git-Tag: v2.6.13-rc2~59^2~14^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=96e017495e6833adcbad84783e3c5eb685836bbf;p=pandora-kernel.git

[IA64] On return from syscall, hint b7 with __kernel_syscall_via_epc().

Why is this a good idea?  Clearing b7 to 0 is guaranteed to do us no
good and writing it with __kernel_syscall_via_epc() yields a 6 cycle
improvement _if_ the application performs another EPC-based system-
call without overwriting b7, which is not all that uncommon.  Well
worth the minimal cost of 1 bundle of code.

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