[PATCH] i386: PARAVIRT: Allow boot-time disable of paravirt_ops patching
Add "noreplace-paravirt" to disable paravirt_ops patching.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
diff --git a/arch/i386/kernel/alternative.c b/arch/i386/kernel/alternative.c
index c5d037c..080a59d 100644
--- a/arch/i386/kernel/alternative.c
+++ b/arch/i386/kernel/alternative.c
@@ -30,6 +30,16 @@
}
__setup("noreplace-smp", setup_noreplace_smp);
+#ifdef CONFIG_PARAVIRT
+static int noreplace_paravirt = 0;
+
+static int __init setup_noreplace_paravirt(char *str)
+{
+ noreplace_paravirt = 1;
+ return 1;
+}
+__setup("noreplace-paravirt", setup_noreplace_paravirt);
+#endif
#define DPRINTK(fmt, args...) if (debug_alternative) \
printk(KERN_DEBUG fmt, args)
@@ -330,6 +340,9 @@
{
struct paravirt_patch_site *p;
+ if (noreplace_paravirt)
+ return;
+
for (p = start; p < end; p++) {
unsigned int used;