linux-kernel - [PATCH] gfp annotations: radix_tree

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Date:	Tue, 10 Oct 2006 22:47:57 +0100
From:	Al Viro <viro@....linux.org.uk>
To:	torvalds@...l.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] gfp annotations: radix_tree_root


struct radix_tree_root has unused upper bits of ->gfp_mask reused for
tags bitmap.  Annotated.

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 lib/radix-tree.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 637d556..aa9bfd0 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -160,13 +160,13 @@ static inline int tag_get(struct radix_t
 
 static inline void root_tag_set(struct radix_tree_root *root, unsigned int tag)
 {
-	root->gfp_mask |= (1 << (tag + __GFP_BITS_SHIFT));
+	root->gfp_mask |= (__force gfp_t)(1 << (tag + __GFP_BITS_SHIFT));
 }
 
 
 static inline void root_tag_clear(struct radix_tree_root *root, unsigned int tag)
 {
-	root->gfp_mask &= ~(1 << (tag + __GFP_BITS_SHIFT));
+	root->gfp_mask &= (__force gfp_t)~(1 << (tag + __GFP_BITS_SHIFT));
 }
 
 static inline void root_tag_clear_all(struct radix_tree_root *root)
@@ -176,7 +176,7 @@ static inline void root_tag_clear_all(st
 
 static inline int root_tag_get(struct radix_tree_root *root, unsigned int tag)
 {
-	return root->gfp_mask & (1 << (tag + __GFP_BITS_SHIFT));
+	return (__force unsigned)root->gfp_mask & (1 << (tag + __GFP_BITS_SHIFT));
 }
 
 /*
-- 
1.4.2.GIT


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