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crash_dump: is_kdump_kernel can be boolean 

Make is_kdump_kernel return bool due to this particular function only
using either one or zero as its return value.

No functional change.

Link: http://lkml.kernel.org/r/1513308799-19232-8-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yaowei Bai 2018-02-06 15:41:38 -08:00 committed by Linus Torvalds
parent db076bef2d
commit 2650cb0c3b
1 changed files with 6 additions and 6 deletions
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12
include/linux/crash_dump.h
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@ -2,13 +2,13 @@
#ifndef LINUX_CRASH_DUMP_H #ifndef LINUX_CRASH_DUMP_H
#define LINUX_CRASH_DUMP_H #define LINUX_CRASH_DUMP_H
#ifdef CONFIG_CRASH_DUMP
#include <linux/kexec.h> #include <linux/kexec.h>
#include <linux/proc_fs.h> #include <linux/proc_fs.h>
#include <linux/elf.h> #include <linux/elf.h>
#include <asm/pgtable.h> /* for pgprot_t */ #include <asm/pgtable.h> /* for pgprot_t */
#ifdef CONFIG_CRASH_DUMP
#define ELFCORE_ADDR_MAX (-1ULL) #define ELFCORE_ADDR_MAX (-1ULL)
#define ELFCORE_ADDR_ERR (-2ULL) #define ELFCORE_ADDR_ERR (-2ULL)
@ -52,13 +52,13 @@ void vmcore_cleanup(void);
* has passed the elf core header address on command line. * has passed the elf core header address on command line.
* *
* This is not just a test if CONFIG_CRASH_DUMP is enabled or not. It will * This is not just a test if CONFIG_CRASH_DUMP is enabled or not. It will
* return 1 if CONFIG_CRASH_DUMP=y and if kernel is booting after a panic of * return true if CONFIG_CRASH_DUMP=y and if kernel is booting after a panic
* previous kernel. * of previous kernel.
*/ */
static inline int is_kdump_kernel(void) static inline bool is_kdump_kernel(void)
{ {
return (elfcorehdr_addr != ELFCORE_ADDR_MAX) ? 1 : 0; return elfcorehdr_addr != ELFCORE_ADDR_MAX;
} }
/* is_vmcore_usable() checks if the kernel is booting after a panic and /* is_vmcore_usable() checks if the kernel is booting after a panic and
@ -89,7 +89,7 @@ extern int register_oldmem_pfn_is_ram(int (*fn)(unsigned long pfn));
extern void unregister_oldmem_pfn_is_ram(void); extern void unregister_oldmem_pfn_is_ram(void);
#else /* !CONFIG_CRASH_DUMP */ #else /* !CONFIG_CRASH_DUMP */
static inline int is_kdump_kernel(void) { return 0; } static inline bool is_kdump_kernel(void) { return 0; }
#endif /* CONFIG_CRASH_DUMP */ #endif /* CONFIG_CRASH_DUMP */
extern unsigned long saved_max_pfn; extern unsigned long saved_max_pfn;