From: Paul Mundt <lethal@linux-sh.org>
Date: Mon, 19 Nov 2007 04:00:32 +0000 (+0900)
Subject: sh: Kill off UTLB flush in fast-path.
X-Git-Tag: v2.6.24-rc4~96^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1c6b2ca5e0939bf8b5d1a11f1646f25189ecd447;p=pandora-kernel.git

sh: Kill off UTLB flush in fast-path.

The __do_page_fault() fast-path contains a UTLB flush in order to
force an ITLB reload, this isn't needed in practice as the ITLB is
auto-reloaded from the UTLB anyways, which is already displaced by
the manual 'ldtlb' in the update_mmu_cache() path.

This provides a measurable speed up in the TLB miss fast-path.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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