diff options
author | Arve Hjønnevåg <arve@android.com> | 2009-01-15 19:07:27 -0800 |
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committer | Arve Hjønnevåg <arve@android.com> | 2009-04-07 16:43:31 -0700 |
commit | fca2519ebf25db61da132932eb3fffeaa1974f43 (patch) | |
tree | b56e3a141963da1152491d933da8a42ae80cb81f /kernel | |
parent | 700cfcab7eee4a822be3fe0c8cfd77caac10bfed (diff) |
Revert "printk: remove unused code from kernel/printk.c"
This reverts commit acff181d3574244e651913df77332e897b88bff4.
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/printk.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index e39866e0a5ab..bf4e7763c3c4 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -236,6 +236,45 @@ static inline void boot_delay_msec(void) #endif /* + * Return the number of unread characters in the log buffer. + */ +static int log_buf_get_len(void) +{ + return logged_chars; +} + +/* + * Copy a range of characters from the log buffer. + */ +int log_buf_copy(char *dest, int idx, int len) +{ + int ret, max; + bool took_lock = false; + + if (!oops_in_progress) { + spin_lock_irq(&logbuf_lock); + took_lock = true; + } + + max = log_buf_get_len(); + if (idx < 0 || idx >= max) { + ret = -1; + } else { + if (len > max) + len = max; + ret = len; + idx += (log_end - max); + while (len-- > 0) + dest[len] = LOG_BUF(idx + len); + } + + if (took_lock) + spin_unlock_irq(&logbuf_lock); + + return ret; +} + +/* * Commands to do_syslog: * * 0 -- Close the log. Currently a NOP. |