xen: fix too early kmalloc call

Impact: fix bootup crash on xen guests

SLAB is not yet up, with earlyprintk it is giving me an Oops in __kmalloc.

Replace call to kmalloc() with alloc_bootmem().

Reported-by: Christophe Saout <christophe@saout.de>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index ed7527b3745a..3141e149d595 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -26,6 +26,7 @@
 #include <linux/irq.h>
 #include <linux/module.h>
 #include <linux/string.h>
+#include <linux/bootmem.h>
 
 #include <asm/ptrace.h>
 #include <asm/irq.h>
@@ -831,8 +832,8 @@ void __init xen_init_IRQ(void)
         int i;
         size_t size = nr_cpu_ids * sizeof(struct cpu_evtchn_s);
 
-        cpu_evtchn_mask_p = kmalloc(size, GFP_KERNEL);
-        BUG_ON(cpu_evtchn_mask == NULL);
+        cpu_evtchn_mask_p = alloc_bootmem(size);
+        BUG_ON(cpu_evtchn_mask_p == NULL);
 
         init_evtchn_cpu_bindings();