[PATCH v3 14/14] suspend: fix duplicate extern declarations

[Safocl Stollmannovic <safocl88@gmail.com>]

Compiling a kernel module with a C++ compiler results in a "duplicate
extern specifier" error.
This occurs because the code contains `extern asmlinkage`, and `asmlinkage`
expands to `extern C` when processed by a C++ compiler.
Since the code already contains sections that respond to a C++ compiler,
I believe it is a perfectly valid approach to gradually move toward a state
where kernel modules can be compiled by a C++ compiler without any issues.
The `extern` specifier must be removed.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=222257
Signed-off-by: Safocl Stollmannovic <safocl88@gmail.com>
---
 include/linux/suspend.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index a38150277..b97af3420 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -385,8 +385,8 @@ extern int swsusp_page_is_forbidden(struct page *);
 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);
+asmlinkage int swsusp_arch_suspend(void);
+asmlinkage int swsusp_arch_resume(void);
 
 extern u32 swsusp_hardware_signature;
 extern void hibernation_set_ops(const struct platform_hibernation_ops *ops);
-- 
2.56.1