[PATCH] kdump: vmcore compilation warning fix

o fs/proc/vmcore.c compilation gives warnings on ppc64. The reason being
  that u64 is defined as unsigned long hence u64* is not same as loff_t*
  and compiler cribs.

o Changed the parameter type to u64* instead of loff_t* to resolve the
  conflict.

Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 124e354..4063fb3 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -41,7 +41,7 @@
 
 /* Reads a page from the oldmem device from given offset. */
 static ssize_t read_from_oldmem(char *buf, size_t count,
-			     loff_t *ppos, int userbuf)
+				u64 *ppos, int userbuf)
 {
 	unsigned long pfn, offset;
 	size_t nr_bytes;