diff options
author | Ingo Molnar <mingo@elte.hu> | 2009-04-06 01:41:22 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-04-06 01:41:22 +0200 |
commit | 9efe21cb82b5dbe3b0b2ae4de4eccc64ecb94e95 (patch) | |
tree | 7ff8833745d2f268f897f6fa4a27263b4a572245 /kernel/printk.c | |
parent | de18836e447c2dc30120c0919b8db8ddc0401cc4 (diff) | |
parent | 0221c81b1b8eb0cbb6b30a0ced52ead32d2b4e4c (diff) |
Merge branch 'linus' into irq/threaded
Conflicts:
include/linux/irq.h
kernel/irq/handle.c
Diffstat (limited to 'kernel/printk.c')
-rw-r--r-- | kernel/printk.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index e3602d0755b..5052b5497c6 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); @@ -1292,8 +1311,11 @@ EXPORT_SYMBOL(printk_ratelimit); bool printk_timed_ratelimit(unsigned long *caller_jiffies, unsigned int interval_msecs) { - if (*caller_jiffies == 0 || time_after(jiffies, *caller_jiffies)) { - *caller_jiffies = jiffies + msecs_to_jiffies(interval_msecs); + if (*caller_jiffies == 0 + || !time_in_range(jiffies, *caller_jiffies, + *caller_jiffies + + msecs_to_jiffies(interval_msecs))) { + *caller_jiffies = jiffies; return true; } return false; |