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x86: Avoid missing-prototype warnings for doublefault code

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Two functions in the 32-bit doublefault code are lacking a prototype:

arch/x86/kernel/doublefault_32.c:23:36: error: no previous prototype for 'doublefault_shim' [-Werror=missing-prototypes]
   23 | asmlinkage noinstr void __noreturn doublefault_shim(void)
      |                                    ^~~~~~~~~~~~~~~~
arch/x86/kernel/doublefault_32.c:114:6: error: no previous prototype for 'doublefault_init_cpu_tss' [-Werror=missing-prototypes]
  114 | void doublefault_init_cpu_tss(void)

The first one is only called from assembler, while the second one is
declared in doublefault.h, but this file is not included.

Include the header file and add the other declaration there as well.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Link: https://lore.kernel.org/all/20230516193549.544673-8-arnd%40kernel.org
This commit is contained in:
Arnd Bergmann 2023-05-16 21:35:36 +02:00 • committed by Dave Hansen
parent 16db7e9c6e
commit c966483930
2 changed files with 5 additions and 0 deletions
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4
arch/x86/include/asm/doublefault.h
View file

@ -2,6 +2,8 @@
#ifndef _ASM_X86_DOUBLEFAULT_H
#define _ASM_X86_DOUBLEFAULT_H
#include <linux/linkage.h>
#ifdef CONFIG_X86_32
extern void doublefault_init_cpu_tss(void);
#else
@ -10,4 +12,6 @@ static inline void doublefault_init_cpu_tss(void)
}
#endif
asmlinkage void __noreturn doublefault_shim(void);
#endif /* _ASM_X86_DOUBLEFAULT_H */

1
arch/x86/kernel/doublefault_32.c
View file

@ -9,6 +9,7 @@
#include <asm/processor.h>
#include <asm/desc.h>
#include <asm/traps.h>
#include <asm/doublefault.h>
#define ptr_ok(x) ((x) > PAGE_OFFSET && (x) < PAGE_OFFSET + MAXMEM)