[PATCH] kmemtrace:fix undeclared 'PAGE_SIZE' via asm/page.h

[Wu Zhangjin <wuzhangjin@gmail.com>]

From: Wu Zhangjin <wuzj@lemote.com>

when compiling linux-mips with kmemtrace enabled, this error will be
there:

include/linux/trace_seq.h:12: error: 'PAGE_SIZE' undeclared here (not in
				a function)

I checked the source code and found trace_seq.h used PAGE_SIZE but not
include the relative header file, so, fix it via adding the header file
<asm/page.h>

this error will not be triggered in linux-x86 for there is a
<asm/page.h> header file included in a certain header file. but which
not means <asm/page.h> is not needed in trace_seq.h

Signed-off-by: Wu Zhangjin <wuzj@lemote.com>
---
 include/linux/trace_seq.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/linux/trace_seq.h b/include/linux/trace_seq.h
index c68bccb..c134dd1 100644
--- a/include/linux/trace_seq.h
+++ b/include/linux/trace_seq.h
@@ -3,6 +3,8 @@
 
 #include <linux/fs.h>
 
+#include <asm/page.h>
+
 /*
  * Trace sequences are used to allow a function to call several other functions
  * to create a string of data to use (up to a max of PAGE_SIZE.
-- 
1.6.0.4