linux-kernel - [PATCH 3.18 034/185] x86/power: Fix swsusp_arch

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Message-Id: <20180528100052.803961873@linuxfoundation.org>
Date:   Mon, 28 May 2018 12:01:15 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Len Brown <len.brown@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Nicolas Pitre <nico@...aro.org>, linux-pm@...r.kernel.org,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Pavel Machek <pavel@....cz>,
        Bart Van Assche <bart.vanassche@....com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 3.18 034/185] x86/power: Fix swsusp_arch_resume prototype

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann <arnd@...db.de>

[ Upstream commit 328008a72d38b5bde6491e463405c34a81a65d3e ]

The declaration for swsusp_arch_resume marks it as 'asmlinkage', but the
definition in x86-32 does not, and it fails to include the header with the
declaration. This leads to a warning when building with
link-time-optimizations:

kernel/power/power.h:108:23: error: type of 'swsusp_arch_resume' does not match original declaration [-Werror=lto-type-mismatch]
 extern asmlinkage int swsusp_arch_resume(void);
                       ^
arch/x86/power/hibernate_32.c:148:0: note: 'swsusp_arch_resume' was previously declared here
 int swsusp_arch_resume(void)

This moves the declaration into a globally visible header file and fixes up
both x86 definitions to match it.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Len Brown <len.brown@...el.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Nicolas Pitre <nico@...aro.org>
Cc: linux-pm@...r.kernel.org
Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc: Pavel Machek <pavel@....cz>
Cc: Bart Van Assche <bart.vanassche@....com>
Link: https://lkml.kernel.org/r/20180202145634.200291-2-arnd@arndb.de
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/x86/power/hibernate_32.c |    2 +-
 arch/x86/power/hibernate_64.c |    2 +-
 include/linux/suspend.h       |    2 ++
 kernel/power/power.h          |    3 ---
 4 files changed, 4 insertions(+), 5 deletions(-)

--- a/arch/x86/power/hibernate_32.c
+++ b/arch/x86/power/hibernate_32.c
@@ -142,7 +142,7 @@ static inline void resume_init_first_lev
 #endif
 }
 
-int swsusp_arch_resume(void)
+asmlinkage int swsusp_arch_resume(void)
 {
 	int error;
 
--- a/arch/x86/power/hibernate_64.c
+++ b/arch/x86/power/hibernate_64.c
@@ -78,7 +78,7 @@ static int set_up_temporary_mappings(voi
 	return 0;
 }
 
-int swsusp_arch_resume(void)
+asmlinkage int swsusp_arch_resume(void)
 {
 	int error;
 
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -325,6 +325,8 @@ extern int swsusp_page_is_forbidden(stru
 extern void swsusp_set_page_free(struct page *);
 extern void swsusp_unset_page_free(struct page *);
 extern unsigned long get_safe_page(gfp_t gfp_mask);
+extern asmlinkage int swsusp_arch_suspend(void);
+extern asmlinkage int swsusp_arch_resume(void);
 
 extern void hibernation_set_ops(const struct platform_hibernation_ops *ops);
 extern int hibernate(void);
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -85,9 +85,6 @@ extern int in_suspend;
 extern dev_t swsusp_resume_device;
 extern sector_t swsusp_resume_block;
 
-extern asmlinkage int swsusp_arch_suspend(void);
-extern asmlinkage int swsusp_arch_resume(void);
-
 extern int create_basic_memory_bitmaps(void);
 extern void free_basic_memory_bitmaps(void);
 extern int hibernate_preallocate_memory(void);