[PATCH] ignore ,keep for efi earlyprintk

Dave Young
2014-04-24T09:37:18Z

earlyprint=efi,keep results a kernel hang after "Freeing unused kernel memory"

Actually efi earlyprintk is using __init functions such as early_ioremap etc.
Thus efi earlyconsole can not be kept.

So just ignore it and give out a warning to user.

Signed-off-by: Dave Young <dyoung@redhat.com>
---
arch/x86/kernel/early_printk.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

Index: linux-2.6/arch/x86/kernel/early_printk.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/early_printk.c
+++ linux-2.6/arch/x86/kernel/early_printk.c
@@ -237,8 +237,11 @@ static int __init setup_early_printk(cha
}
#endif
#ifdef CONFIG_EARLY_PRINTK_EFI
- if (!strncmp(buf, "efi", 3))
- early_console_register(&early_efi_console, keep);
+ if (!strncmp(buf, "efi", 3)) {
+ if (keep)
+ pr_warn("Ignoring ,keep for earlyprintk=efi\n");
+ early_console_register(&early_efi_console, 0);
+ }
#endif

buf++;