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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2012-01-12 17:20:11 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-12 20:13:11 -0800 |
| commit | a3dd3323058d281abd584b15ad4c5b65064d7a61 (patch) | |
| tree | 98c65337f9960db2d0ca55687314bb821f3e7c1f | |
| parent | 9512938b885304f72c847379611d6018064af840 (diff) | |
| download | linux-stable-a3dd3323058d281abd584b15ad4c5b65064d7a61.tar.gz linux-stable-a3dd3323058d281abd584b15ad4c5b65064d7a61.tar.bz2 linux-stable-a3dd3323058d281abd584b15ad4c5b65064d7a61.zip | |
kexec: remove KMSG_DUMP_KEXEC
KMSG_DUMP_KEXEC is useless because we already save kernel messages inside
/proc/vmcore, and it is unsafe to allow modules to do other stuffs in a
crash dump scenario.
[akpm@linux-foundation.org: fix powerpc build]
Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Reported-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Jarod Wilson <jarod@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/powerpc/platforms/pseries/nvram.c | 1 | ||||
| -rw-r--r-- | drivers/char/ramoops.c | 3 | ||||
| -rw-r--r-- | drivers/mtd/mtdoops.c | 3 | ||||
| -rw-r--r-- | include/linux/kmsg_dump.h | 1 | ||||
| -rw-r--r-- | kernel/kexec.c | 3 |
5 files changed, 2 insertions, 9 deletions
diff --git a/arch/powerpc/platforms/pseries/nvram.c b/arch/powerpc/platforms/pseries/nvram.c index 330a57b7c17c..36f957f31842 100644 --- a/arch/powerpc/platforms/pseries/nvram.c +++ b/arch/powerpc/platforms/pseries/nvram.c @@ -638,7 +638,6 @@ static void oops_to_nvram(struct kmsg_dumper *dumper, /* These are almost always orderly shutdowns. */ return; case KMSG_DUMP_OOPS: - case KMSG_DUMP_KEXEC: break; case KMSG_DUMP_PANIC: panicking = true; diff --git a/drivers/char/ramoops.c b/drivers/char/ramoops.c index 7c7f42a1f880..feda90cdac9f 100644 --- a/drivers/char/ramoops.c +++ b/drivers/char/ramoops.c @@ -83,8 +83,7 @@ static void ramoops_do_dump(struct kmsg_dumper *dumper, struct timeval timestamp; if (reason != KMSG_DUMP_OOPS && - reason != KMSG_DUMP_PANIC && - reason != KMSG_DUMP_KEXEC) + reason != KMSG_DUMP_PANIC) return; /* Only dump oopses if dump_oops is set */ diff --git a/drivers/mtd/mtdoops.c b/drivers/mtd/mtdoops.c index db8e8272d69b..3ce99e00a49e 100644 --- a/drivers/mtd/mtdoops.c +++ b/drivers/mtd/mtdoops.c @@ -315,8 +315,7 @@ static void mtdoops_do_dump(struct kmsg_dumper *dumper, char *dst; if (reason != KMSG_DUMP_OOPS && - reason != KMSG_DUMP_PANIC && - reason != KMSG_DUMP_KEXEC) + reason != KMSG_DUMP_PANIC) return; /* Only dump oopses if dump_oops is set */ diff --git a/include/linux/kmsg_dump.h b/include/linux/kmsg_dump.h index ee0c952188de..fee66317e071 100644 --- a/include/linux/kmsg_dump.h +++ b/include/linux/kmsg_dump.h @@ -18,7 +18,6 @@ enum kmsg_dump_reason { KMSG_DUMP_OOPS, KMSG_DUMP_PANIC, - KMSG_DUMP_KEXEC, KMSG_DUMP_RESTART, KMSG_DUMP_HALT, KMSG_DUMP_POWEROFF, diff --git a/kernel/kexec.c b/kernel/kexec.c index 090ee10d9604..20ed47ae252f 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -32,7 +32,6 @@ #include <linux/console.h> #include <linux/vmalloc.h> #include <linux/swap.h> -#include <linux/kmsg_dump.h> #include <linux/syscore_ops.h> #include <asm/page.h> @@ -1094,8 +1093,6 @@ void crash_kexec(struct pt_regs *regs) if (kexec_crash_image) { struct pt_regs fixed_regs; - kmsg_dump(KMSG_DUMP_KEXEC); - crash_setup_regs(&fixed_regs, regs); crash_save_vmcoreinfo(); machine_crash_shutdown(&fixed_regs); |