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Message-Id: <20180508140628.f30774c70c4c481bff3f8000@arm.com>
Date: Tue, 8 May 2018 14:06:28 -0500
From: Kim Phillips <kim.phillips@....com>
To: Mathieu Poirier <mathieu.poirier@...aro.org>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Alex Williamson <alex.williamson@...hat.com>,
Andrew Morton <akpm@...ux-foundation.org>,
David Howells <dhowells@...hat.com>,
Eric Auger <eric.auger@...hat.com>,
Eric Biederman <ebiederm@...ssion.com>,
Gargi Sharma <gs051095@...il.com>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Kefeng Wang <wangkefeng.wang@...wei.com>,
Kim Phillips <kim.phillips@....com>,
Kirill Tkhai <ktkhai@...tuozzo.com>,
Mike Rapoport <rppt@...ux.vnet.ibm.com>,
Oleg Nesterov <oleg@...hat.com>,
Pavel Tatashin <pasha.tatashin@...cle.com>,
Rik van Riel <riel@...hat.com>,
Robin Murphy <robin.murphy@....com>,
Russell King <linux@...linux.org.uk>,
Thierry Reding <treding@...dia.com>,
Todd Kjos <tkjos@...gle.com>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] amba: Export amba_bustype
This patch is provided in the context of allowing the Coresight driver
subsystem to be loaded as modules. Coresight uses amba_bus in its call
to bus_find_device() in of_coresight_get_endpoint_device() when
searching for a configurable endpoint device. This patch allows
Coresight to reference amba_bustype when built as a module.
Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
Cc: Alex Williamson <alex.williamson@...hat.com>
Cc: Eric Auger <eric.auger@...hat.com>
Cc: Russell King <linux@...linux.org.uk>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Todd Kjos <tkjos@...gle.com>
Cc: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Thierry Reding <treding@...dia.com>
Cc: Robin Murphy <robin.murphy@....com>
Signed-off-by: Kim Phillips <kim.phillips@....com>
---
There was a prior patch submitted by Alex W. here:
https://lkml.org/lkml/2017/6/19/811
But I can't tell its fate - presume simply delayed?
Coresight uses amba_bus in its call to bus_find_device() here:
https://lxr.missinglinkelectronics.com/linux/drivers/hwtracing/coresight/of_coresight.c#L51
Grepping for bus_type and EXPORT shows other busses exporting their
type, so I don't think this is the wrong approach. If, OTOH, Coresight
needs to do something differently, please comment.
drivers/amba/bus.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index 594c228d2f02..12283bd06733 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -197,6 +197,7 @@ struct bus_type amba_bustype = {
.pm = &amba_pm,
.force_dma = true,
};
+EXPORT_SYMBOL_GPL(amba_bustype);
static int __init amba_init(void)
{
--
2.16.2
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