diff options
author | Chris Zankel <chris@zankel.net> | 2009-04-03 02:29:05 -0700 |
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committer | Chris Zankel <chris@zankel.net> | 2009-04-03 02:29:05 -0700 |
commit | 65127d28e312bb6b38ce84a7bb71d762ef63ad4c (patch) | |
tree | d5fdf52a2d0731f7fab0ce0ed394faac50b04fbc /kernel/printk.c | |
parent | b8bb76713ec50df2f11efee386e16f93d51e1076 (diff) | |
parent | 8fe74cf053de7ad2124a894996f84fa890a81093 (diff) |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into merge
Diffstat (limited to 'kernel/printk.c')
-rw-r--r-- | kernel/printk.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index e3602d0755b..a5f61a9aced 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -32,6 +32,7 @@ #include <linux/security.h> #include <linux/bootmem.h> #include <linux/syscalls.h> +#include <linux/kexec.h> #include <asm/uaccess.h> @@ -135,6 +136,24 @@ static char *log_buf = __log_buf; static int log_buf_len = __LOG_BUF_LEN; static unsigned logged_chars; /* Number of chars produced since last read+clear operation */ +#ifdef CONFIG_KEXEC +/* + * This appends the listed symbols to /proc/vmcoreinfo + * + * /proc/vmcoreinfo is used by various utiilties, like crash and makedumpfile to + * obtain access to symbols that are otherwise very difficult to locate. These + * symbols are specifically used so that utilities can access and extract the + * dmesg log from a vmcore file after a crash. + */ +void log_buf_kexec_setup(void) +{ + VMCOREINFO_SYMBOL(log_buf); + VMCOREINFO_SYMBOL(log_end); + VMCOREINFO_SYMBOL(log_buf_len); + VMCOREINFO_SYMBOL(logged_chars); +} +#endif + static int __init log_buf_len_setup(char *str) { unsigned size = memparse(str, &str); |