linux-kernel - [PATCH v2 1/2] firmware_loader: revert removal of the fw_fallback

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Message-Id: <20200424184916.22843-1-mcgrof@kernel.org>
Date:   Fri, 24 Apr 2020 18:49:15 +0000
From:   "Luis R. Rodriguez" <mcgrof@...nel.org>
To:     gregkh@...uxfoundation.org
Cc:     akpm@...ux-foundation.org, josh@...htriplett.org,
        rishabhb@...eaurora.org, kubakici@...pl, maco@...roid.com,
        david.brown@...aro.org, bjorn.andersson@...aro.org,
        linux-wireless@...r.kernel.org, keescook@...omium.org,
        shuah@...nel.org, mfuzzey@...keon.com, zohar@...ux.vnet.ibm.com,
        dhowells@...hat.com, pali.rohar@...il.com, tiwai@...e.de,
        arend.vanspriel@...adcom.com, zajec5@...il.com, nbroeking@...com,
        broonie@...nel.org, dmitry.torokhov@...il.com, dwmw2@...radead.org,
        torvalds@...ux-foundation.org, Abhay_Salunke@...l.com,
        jewalt@...innovations.com, cantabile.desu@...il.com, ast@...com,
        andresx7@...il.com, dan.rue@...aro.org, brendanhiggins@...gle.com,
        yzaikin@...gle.com, sfr@...b.auug.org.au, rdunlap@...radead.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        Luis Chamberlain <mcgrof@...nel.org>
Subject: [PATCH v2 1/2] firmware_loader: revert removal of the fw_fallback_config export

From: Luis Chamberlain <mcgrof@...nel.org>

Christoph's patch removed two unsused exported symbols, however, one
symbol is used by the firmware_loader itself.  If CONFIG_FW_LOADER=m so
the firmware_loader is modular but CONFIG_FW_LOADER_USER_HELPER=y we fail
the build at mostpost.

ERROR: modpost: "fw_fallback_config" [drivers/base/firmware_loader/firmware_class.ko] undefined!

This happens because the variable fw_fallback_config is built into the
kernel if CONFIG_FW_LOADER_USER_HELPER=y always, so we need to grant
access to the firmware loader module by exporting it.

Revert only one hunk from his patch.

Fixes: 739604734bd8e4ad71 ("firmware_loader: remove unused exports")
Reported-by: Randy Dunlap <rdunlap@...radead.org>
Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
---
 drivers/base/firmware_loader/fallback_table.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/base/firmware_loader/fallback_table.c b/drivers/base/firmware_loader/fallback_table.c
index 0a737349f78f..a182e318bd09 100644
--- a/drivers/base/firmware_loader/fallback_table.c
+++ b/drivers/base/firmware_loader/fallback_table.c
@@ -21,6 +21,7 @@ struct firmware_fallback_config fw_fallback_config = {
 	.loading_timeout = 60,
 	.old_timeout = 60,
 };
+EXPORT_SYMBOL_GPL(fw_fallback_config);
 
 #ifdef CONFIG_SYSCTL
 struct ctl_table firmware_config_table[] = {
-- 
2.25.1