From: sukadev@linux.vnet.ibm.com <sukadev@linux.vnet.ibm.com>
Date: Wed, 1 Oct 2014 06:03:18 +0000 (-0700)
Subject: powerpc/perf/hv-24x7: Simplify catalog_read()
X-Git-Tag: fixes-against-v3.18-rc2~117^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=56f12bee55d740dc47eed0ca9d5c72cffdffd6cf;p=pandora-kernel.git

powerpc/perf/hv-24x7: Simplify catalog_read()

catalog_read() implements the read interface for the sysfs file

	/sys/bus/event_source/devices/hv_24x7/interface/catalog

It essentially takes a buffer, an offset and count as parameters
to the read() call.  It makes a hypervisor call to read a specific
page from the catalog and copy the required bytes into the given
buffer. Each call to catalog_read() returns at most one 4K page.

Given these requirements, we should be able to simplify the
catalog_read().

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---

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