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>
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@ -2,13 +2,13 @@
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#ifndef LINUX_CRASH_DUMP_H
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#define LINUX_CRASH_DUMP_H
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#ifdef CONFIG_CRASH_DUMP
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#include <linux/kexec.h>
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#include <linux/proc_fs.h>
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#include <linux/elf.h>
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#include <asm/pgtable.h> /* for pgprot_t */
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#ifdef CONFIG_CRASH_DUMP
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#define ELFCORE_ADDR_MAX (-1ULL)
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#define ELFCORE_ADDR_ERR (-2ULL)
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@ -52,13 +52,13 @@ void vmcore_cleanup(void);
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* has passed the elf core header address on command line.
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*
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* This is not just a test if CONFIG_CRASH_DUMP is enabled or not. It will
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* return 1 if CONFIG_CRASH_DUMP=y and if kernel is booting after a panic of
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* previous kernel.
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* return true if CONFIG_CRASH_DUMP=y and if kernel is booting after a panic
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* of previous kernel.
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*/
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static inline int is_kdump_kernel(void)
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static inline bool is_kdump_kernel(void)
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{
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return (elfcorehdr_addr != ELFCORE_ADDR_MAX) ? 1 : 0;
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return elfcorehdr_addr != ELFCORE_ADDR_MAX;
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}
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/* is_vmcore_usable() checks if the kernel is booting after a panic and
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@ -89,7 +89,7 @@ extern int register_oldmem_pfn_is_ram(int (*fn)(unsigned long pfn));
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extern void unregister_oldmem_pfn_is_ram(void);
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#else /* !CONFIG_CRASH_DUMP */
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static inline int is_kdump_kernel(void) { return 0; }
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static inline bool is_kdump_kernel(void) { return 0; }
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#endif /* CONFIG_CRASH_DUMP */
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extern unsigned long saved_max_pfn;
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