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| author | Vivek Goyal <vgoyal@in.ibm.com> | 2005-06-25 14:58:12 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-25 16:24:51 -0700 |
| commit | 625f1c8219d95300ed32e4c67eb62a50ded095ba (patch) | |
| tree | 2e303a649604cabc922f2ade67435eaf83bbfa98 | |
| parent | cf13f0eaffa31bf6a145c53c589654b11c72ddc7 (diff) | |
| download | lwn-625f1c8219d95300ed32e4c67eb62a50ded095ba.tar.gz lwn-625f1c8219d95300ed32e4c67eb62a50ded095ba.zip | |
[PATCH] Kdump: Export crash notes section address through sysfs
o Following patch exports kexec global variable "crash_notes" to user space
through sysfs as kernel attribute in /sys/kernel.
Signed-off-by: Maneesh Soni <maneesh@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | arch/i386/kernel/crash.c | 2 | ||||
| -rw-r--r-- | arch/x86_64/kernel/crash.c | 3 | ||||
| -rw-r--r-- | include/asm-i386/kexec.h | 5 | ||||
| -rw-r--r-- | include/asm-x86_64/kexec.h | 5 | ||||
| -rw-r--r-- | kernel/ksysfs.c | 13 |
5 files changed, 23 insertions, 5 deletions
diff --git a/arch/i386/kernel/crash.c b/arch/i386/kernel/crash.c index 59b92d217464..3645ad7ac200 100644 --- a/arch/i386/kernel/crash.c +++ b/arch/i386/kernel/crash.c @@ -26,8 +26,6 @@ #include <asm/apic.h> #include <mach_ipi.h> -#define MAX_NOTE_BYTES 1024 -typedef u32 note_buf_t[MAX_NOTE_BYTES/4]; note_buf_t crash_notes[NR_CPUS]; diff --git a/arch/x86_64/kernel/crash.c b/arch/x86_64/kernel/crash.c index 7caf8a49d0cb..6183bcb85257 100644 --- a/arch/x86_64/kernel/crash.c +++ b/arch/x86_64/kernel/crash.c @@ -20,9 +20,6 @@ #include <asm/nmi.h> #include <asm/hw_irq.h> -#define MAX_NOTE_BYTES 1024 -typedef u32 note_buf_t[MAX_NOTE_BYTES/4]; - note_buf_t crash_notes[NR_CPUS]; void machine_crash_shutdown(void) diff --git a/include/asm-i386/kexec.h b/include/asm-i386/kexec.h index a1599b55d62d..6ed2a03e37b3 100644 --- a/include/asm-i386/kexec.h +++ b/include/asm-i386/kexec.h @@ -25,4 +25,9 @@ /* The native architecture */ #define KEXEC_ARCH KEXEC_ARCH_386 +#define MAX_NOTE_BYTES 1024 +typedef u32 note_buf_t[MAX_NOTE_BYTES/4]; + +extern note_buf_t crash_notes[]; + #endif /* _I386_KEXEC_H */ diff --git a/include/asm-x86_64/kexec.h b/include/asm-x86_64/kexec.h index dc33646dc7dd..42d2ff15c592 100644 --- a/include/asm-x86_64/kexec.h +++ b/include/asm-x86_64/kexec.h @@ -25,4 +25,9 @@ /* The native architecture */ #define KEXEC_ARCH KEXEC_ARCH_X86_64 +#define MAX_NOTE_BYTES 1024 +typedef u32 note_buf_t[MAX_NOTE_BYTES/4]; + +extern note_buf_t crash_notes[]; + #endif /* _X86_64_KEXEC_H */ diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c index 1f064a63f8cf..015fb69ad94d 100644 --- a/kernel/ksysfs.c +++ b/kernel/ksysfs.c @@ -30,6 +30,16 @@ static ssize_t hotplug_seqnum_show(struct subsystem *subsys, char *page) KERNEL_ATTR_RO(hotplug_seqnum); #endif +#ifdef CONFIG_KEXEC +#include <asm/kexec.h> + +static ssize_t crash_notes_show(struct subsystem *subsys, char *page) +{ + return sprintf(page, "%p\n", (void *)crash_notes); +} +KERNEL_ATTR_RO(crash_notes); +#endif + decl_subsys(kernel, NULL, NULL); EXPORT_SYMBOL_GPL(kernel_subsys); @@ -37,6 +47,9 @@ static struct attribute * kernel_attrs[] = { #ifdef CONFIG_HOTPLUG &hotplug_seqnum_attr.attr, #endif +#ifdef CONFIG_KEXEC + &crash_notes_attr.attr, +#endif NULL }; |