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[PATCH] Add a sysfs file to determine if a kexec kernel is loaded

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Create two files in /sys/kernel, kexec_loaded and kexec_crash_loaded.  Each
file contains a simple boolean value indicating whether the relevant kernel
has been loaded into memory.  The motivation for this is geared around
support.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jeff Moyer 2006-06-23 02:05:07 -07:00 • committed by Linus Torvalds
parent 24bbb1faf3
commit c330dda908
3 changed files with 23 additions and 3 deletions
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1
include/linux/kexec.h
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@ -106,6 +106,7 @@ extern struct page *kimage_alloc_control_pages(struct kimage *image,
extern void crash_kexec(struct pt_regs *);
int kexec_should_crash(struct task_struct *);
extern struct kimage *kexec_image;
extern struct kimage *kexec_crash_image;
#define KEXEC_ON_CRASH 0x00000001
#define KEXEC_ARCH_MASK 0xffff0000