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authorNishanth Aravamudan <nacc@us.ibm.com>2011-08-25 15:59:11 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2011-10-03 11:39:46 -0700
commit7f4e15693062aa1afcfc8f05f6790baf29bacfa3 (patch)
treed4ef5496034aaaeba1ce945f810ee56ec2a5fce5 /kernel
parent04aa37b5f943920017ad094e776cd5514b1a9246 (diff)
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kernel/printk: do not turn off bootconsole in printk_late_init() if keep_bootcon
commit 4c30c6f566c0989ddaee3407da44751e340a63ed upstream. It seems that 7bf693951a8e ("console: allow to retain boot console via boot option keep_bootcon") doesn't always achieve what it aims, as when printk_late_init() runs it unconditionally turns off all boot consoles. With this patch, I am able to see more messages on the boot console in KVM guests than I can without, when keep_bootcon is specified. I think it is appropriate for the relevant -stable trees. However, it's more of an annoyance than a serious bug (ideally you don't need to keep the boot console around as console handover should be working -- I was encountering a situation where the console handover wasn't working and not having the boot console available meant I couldn't see why). Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Cc: David S. Miller <davem@davemloft.net> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Greg KH <gregkh@suse.de> Acked-by: Fabio M. Di Nitto <fdinitto@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/printk.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/printk.c b/kernel/printk.c
index 3518539..084982f 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -1584,7 +1584,7 @@ static int __init printk_late_init(void)
struct console *con;
for_each_console(con) {
- if (con->flags & CON_BOOT) {
+ if (!keep_bootcon && con->flags & CON_BOOT) {
printk(KERN_INFO "turn off boot console %s%d\n",
con->name, con->index);
unregister_console(con);