From: Tejun Heo <tj@kernel.org>
Date: Sat, 13 Dec 2014 00:55:35 +0000 (-0800)
Subject: mm: move swp_entry_t definition to include/linux/mm_types.h
X-Git-Tag: omap-for-v3.19/fixes-rc1~100^2~69
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bd6dace78b9e4595d29892f806514518449c7489;p=pandora-kernel.git

mm: move swp_entry_t definition to include/linux/mm_types.h

swp_entry_t being defined in include/linux/swap.h instead of
include/linux/mm_types.h causes cyclic include dependency later when
include/linux/page_cgroup.h is included from writeback path.  Move the
definition to include/linux/mm_types.h.

While at it, reformat the comment above it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index bf9f57529dcf..fc2daffa9db1 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -534,4 +534,12 @@ enum tlb_flush_reason {
 	NR_TLB_FLUSH_REASONS,
 };
 
+ /*
+  * A swap entry has to fit into a "unsigned long", as the entry is hidden
+  * in the "index" field of the swapper address space.
+  */
+typedef struct {
+	unsigned long val;
+} swp_entry_t;
+
 #endif /* _LINUX_MM_TYPES_H */
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