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Message-ID: <20110720135524.GW11013@ZenIV.linux.org.uk>
Date: Wed, 20 Jul 2011 14:55:24 +0100
From: Al Viro <viro@...IV.linux.org.uk>
To: Stephen Rothwell <sfr@...b.auug.org.au>
Cc: linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
Dave Chinner <dchinner@...hat.com>,
"David S. Miller" <davem@...emloft.net>
Subject: Re: linux-next: build failure after merge of the final tree (maybe
vfs tree related)
On Wed, Jul 20, 2011 at 05:32:32PM +1000, Stephen Rothwell wrote:
> Hi all,
>
> After merging the final tree, today's linux-next build (sparc defconfig)
> failed like this:
> And many more similar. Again, I assume some include files changed.
> Maybe commit 347727d3f51d ("superblock: introduce per-sb cache shrinker
> infrastructure") which included linux/mm.h in linux/fs.h ...
>
> I have left this again.
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 1ce9086..e0569e4 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -395,7 +395,7 @@ struct inodes_stat_t {
#include <linux/semaphore.h>
#include <linux/fiemap.h>
#include <linux/rculist_bl.h>
-#include <linux/mm.h>
+#include <linux/shrinker.h>
#include <linux/atomic.h>
#include <asm/byteorder.h>
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 9b9777a..e3a1a9e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -15,6 +15,7 @@
#include <linux/range.h>
#include <linux/pfn.h>
#include <linux/bit_spinlock.h>
+#include <linux/shrinker.h>
struct mempolicy;
struct anon_vma;
@@ -1121,45 +1122,6 @@ static inline void sync_mm_rss(struct task_struct *task, struct mm_struct *mm)
}
#endif
-/*
- * This struct is used to pass information from page reclaim to the shrinkers.
- * We consolidate the values for easier extention later.
- */
-struct shrink_control {
- gfp_t gfp_mask;
-
- /* How many slab objects shrinker() should scan and try to reclaim */
- unsigned long nr_to_scan;
-};
-
-/*
- * A callback you can register to apply pressure to ageable caches.
- *
- * 'sc' is passed shrink_control which includes a count 'nr_to_scan'
- * and a 'gfpmask'. It should look through the least-recently-used
- * 'nr_to_scan' entries and attempt to free them up. It should return
- * the number of objects which remain in the cache. If it returns -1, it means
- * it cannot do any scanning at this time (eg. there is a risk of deadlock).
- *
- * The 'gfpmask' refers to the allocation we are currently trying to
- * fulfil.
- *
- * Note that 'shrink' will be passed nr_to_scan == 0 when the VM is
- * querying the cache size, so a fastpath for that case is appropriate.
- */
-struct shrinker {
- int (*shrink)(struct shrinker *, struct shrink_control *sc);
- int seeks; /* seeks to recreate an obj */
- long batch; /* reclaim batch size, 0 = default */
-
- /* These are for internal use */
- struct list_head list;
- long nr; /* objs pending delete */
-};
-#define DEFAULT_SEEKS 2 /* A good number if you don't know better. */
-extern void register_shrinker(struct shrinker *);
-extern void unregister_shrinker(struct shrinker *);
-
int vma_wants_writenotify(struct vm_area_struct *vma);
extern pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr,
diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h
new file mode 100644
index 0000000..790651b
--- /dev/null
+++ b/include/linux/shrinker.h
@@ -0,0 +1,42 @@
+#ifndef _LINUX_SHRINKER_H
+#define _LINUX_SHRINKER_H
+
+/*
+ * This struct is used to pass information from page reclaim to the shrinkers.
+ * We consolidate the values for easier extention later.
+ */
+struct shrink_control {
+ gfp_t gfp_mask;
+
+ /* How many slab objects shrinker() should scan and try to reclaim */
+ unsigned long nr_to_scan;
+};
+
+/*
+ * A callback you can register to apply pressure to ageable caches.
+ *
+ * 'sc' is passed shrink_control which includes a count 'nr_to_scan'
+ * and a 'gfpmask'. It should look through the least-recently-used
+ * 'nr_to_scan' entries and attempt to free them up. It should return
+ * the number of objects which remain in the cache. If it returns -1, it means
+ * it cannot do any scanning at this time (eg. there is a risk of deadlock).
+ *
+ * The 'gfpmask' refers to the allocation we are currently trying to
+ * fulfil.
+ *
+ * Note that 'shrink' will be passed nr_to_scan == 0 when the VM is
+ * querying the cache size, so a fastpath for that case is appropriate.
+ */
+struct shrinker {
+ int (*shrink)(struct shrinker *, struct shrink_control *sc);
+ int seeks; /* seeks to recreate an obj */
+ long batch; /* reclaim batch size, 0 = default */
+
+ /* These are for internal use */
+ struct list_head list;
+ long nr; /* objs pending delete */
+};
+#define DEFAULT_SEEKS 2 /* A good number if you don't know better. */
+extern void register_shrinker(struct shrinker *);
+extern void unregister_shrinker(struct shrinker *);
+#endif
--
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