commit 914d6c369d6211b254c2443a5d49804e23275a73
author Ed James <edjames@google.com> Thu Jan 16 07:30:30 2014 -0800
committer Ed James <edjames@google.com> Thu Jan 16 09:55:56 2014 -0800
tree 9ed17b6b6b8a9ca36228072e8695c03a1f4f3da3
parent 3f979e561d7f60ab2a1b3884d508bc4278e766a5

optimus: fix boot hang, log buffer overrun

	* fix error in merge/port of PRINTK_PERSIST to optimus
	* if log previously wrapped (>8M), next boot would overrun log
		when initial boot log is copied to persistent one
	* possibly harmless unless previous log wrapped twice (>16M),
		then would cause hang (bad physical address access?)

Change-Id: I77f4bfa76486b9657e4e64b17efa65333e2932de

kernel/printk.c

diff --git a/kernel/printk.c b/kernel/printk.c
index db1201e..40a766c 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -378,7 +378,6 @@
 	raw_spin_lock_irqsave(&logbuf_lock, flags);
 	log_buf_len = new_log_buf_len;
 	log_buf = new_log_buf;
-	new_log_buf_len = 0;
 	free = __LOG_BUF_LEN - log_end;
 
 #ifdef CONFIG_BOOTLOG_COPY