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59 lines
1.3 KiB
Diff
59 lines
1.3 KiB
Diff
From fca2519ebf25db61da132932eb3fffeaa1974f43 Mon Sep 17 00:00:00 2001
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From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
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Date: Thu, 15 Jan 2009 19:07:27 -0800
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Subject: [PATCH 109/134] Revert "printk: remove unused code from kernel/printk.c"
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This reverts commit acff181d3574244e651913df77332e897b88bff4.
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---
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kernel/printk.c | 39 +++++++++++++++++++++++++++++++++++++++
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1 files changed, 39 insertions(+), 0 deletions(-)
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--- a/kernel/printk.c
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+++ b/kernel/printk.c
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@@ -255,6 +255,45 @@ static inline void boot_delay_msec(void)
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#endif
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/*
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+ * Return the number of unread characters in the log buffer.
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+ */
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+static int log_buf_get_len(void)
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+{
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+ return logged_chars;
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+}
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+
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+/*
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+ * Copy a range of characters from the log buffer.
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+ */
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+int log_buf_copy(char *dest, int idx, int len)
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+{
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+ int ret, max;
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+ bool took_lock = false;
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+
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+ if (!oops_in_progress) {
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+ spin_lock_irq(&logbuf_lock);
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+ took_lock = true;
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+ }
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+
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+ max = log_buf_get_len();
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+ if (idx < 0 || idx >= max) {
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+ ret = -1;
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+ } else {
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+ if (len > max)
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+ len = max;
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+ ret = len;
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+ idx += (log_end - max);
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+ while (len-- > 0)
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+ dest[len] = LOG_BUF(idx + len);
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+ }
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+
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+ if (took_lock)
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+ spin_unlock_irq(&logbuf_lock);
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+
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+ return ret;
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+}
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+
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+/*
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* Commands to do_syslog:
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*
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* 0 -- Close the log. Currently a NOP.
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