linux-kernel - [PATCH] staging: unisys/visorbus: add __init/_

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Date:   Fri, 15 Sep 2017 21:23:13 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     David Kershner <david.kershner@...sys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Arnd Bergmann <arnd@...db.de>, Tim Sell <timothy.sell@...sys.com>,
        Sameer Wadgaonkar <sameer.wadgaonkar@...sys.com>,
        David Binder <david.binder@...sys.com>,
        Bryan Thompson <bryan.thompson@...sys.com>,
        sparmaintainer@...sys.com, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] staging: unisys/visorbus: add __init/__exit annotations

gcc-4.6 causes a harmless warning about the init function:

WARNING: vmlinux.o(.text+0xed62c2): Section mismatch in reference from the function init_unisys() to the function .init.text:visorutil_spar_detect()
The function init_unisys() references
the function __init visorutil_spar_detect().
This is often because init_unisys lacks a __init
annotation or the annotation of visorutil_spar_detect is wrong.

It appears that newer versions inline visorutil_spar_detect(),
end up with an empty __init section. This marks the module
entry points as __init and __exit respectively, which avoids
the warning and slightly reduces the runtime code size.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/staging/unisys/visorbus/visorchipset.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/unisys/visorbus/visorchipset.c b/drivers/staging/unisys/visorbus/visorchipset.c
index 74cce4f1a7bd..27ecf6fb49fd 100644
--- a/drivers/staging/unisys/visorbus/visorchipset.c
+++ b/drivers/staging/unisys/visorbus/visorchipset.c
@@ -1826,7 +1826,7 @@ static __init int visorutil_spar_detect(void)
 	return 0;
 }
 
-static int init_unisys(void)
+static int __init init_unisys(void)
 {
 	int result;
 
@@ -1841,7 +1841,7 @@ static int init_unisys(void)
 	return 0;
 };
 
-static void exit_unisys(void)
+static void __exit exit_unisys(void)
 {
 	acpi_bus_unregister_driver(&unisys_acpi_driver);
 }
-- 
2.9.0