[patch] 2.4 fix to allow vmalloc at interrupt time

[Matthew Jacob <mjacob@feral.com>]

This fixes a buglet wrt doing vmalloc at interrupt time for 2.4.

get_vm_area should call kmalloc with GFP_ATOMIC- after all, it's
set up to allow for an allocation failure. As best as I read
the 2.4 code, the rest of the path through _kmem_cache_alloc
should be safe.

===== vmalloc.c 1.15 vs edited =====
--- 1.15/mm/vmalloc.c	Wed Feb 12 05:30:56 2003
+++ edited/vmalloc.c	Fri May  9 23:42:09 2003
@@ -173,7 +173,7 @@
 	unsigned long addr, next;
 	struct vm_struct **p, *tmp, *area;

-	area = (struct vm_struct *) kmalloc(sizeof(*area), GFP_KERNEL);
+	area = (struct vm_struct *) kmalloc(sizeof(*area), GFP_ATOMIC);
 	if (!area)
 		return NULL;