linux-next: build failure after merge of the staging tree

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Hi Greg,

After merging the staging tree, today's linux-next build (x86_64
allmodconfig) failed like this:

In file included from drivers/staging/lustre/lustre/fid/../include/linux/lustre_compat25.h:44:0,
                 from drivers/staging/lustre/lustre/fid/../include/linux/lvfs.h:48,
                 from drivers/staging/lustre/lustre/fid/../include/lvfs.h:45,
                 from drivers/staging/lustre/lustre/fid/../include/obd_support.h:41,
                 from drivers/staging/lustre/lustre/fid/../include/linux/obd.h:44,
                 from drivers/staging/lustre/lustre/fid/../include/obd.h:40,
                 from drivers/staging/lustre/lustre/fid/fid_store.c:48:
drivers/staging/lustre/lustre/fid/../include/linux/lustre_patchless_compat.h: In function 'truncate_complete_page':
drivers/staging/lustre/lustre/fid/../include/linux/lustre_patchless_compat.h:56:3: error: too few arguments to function 'page->mapping->a_ops->invalidatepage'
   page->mapping->a_ops->invalidatepage(page, 0);
   ^

Lots of times.

Caused by the Lustre client patches interacting with commit d47992f86b30
("mm: change invalidatepage prototype to accept length") from the ext4
tree.

I added this merge fix patch:

From 3873636f50eb89ba5e4f8e4e0523fd62f681edc8 Mon Sep 17 00:00:00 2001
From: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Date: Tue, 4 Jun 2013 14:41:00 +1000
Subject: [PATCH] staging/lustre: fix for invalidatepage() API change

Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
---
 drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h b/drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h
index f050808..67c4644 100644
--- a/drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h
+++ b/drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h
@@ -53,7 +53,7 @@ truncate_complete_page(struct address_space *mapping, struct page *page)
 		return;
 
 	if (PagePrivate(page))
-		page->mapping->a_ops->invalidatepage(page, 0);
+		page->mapping->a_ops->invalidatepage(page, 0, PAGE_CACHE_SIZE);
 
 	cancel_dirty_page(page, PAGE_SIZE);
 	ClearPageMappedToDisk(page);
-- 
1.8.1

diff --git a/drivers/staging/lustre/lustre/llite/rw26.c b/drivers/staging/lustre/lustre/llite/rw26.c
index 27e4e64..f1a1c5f 100644
--- a/drivers/staging/lustre/lustre/llite/rw26.c
+++ b/drivers/staging/lustre/lustre/llite/rw26.c
@@ -72,7 +72,8 @@
  * aligned truncate). Lustre leaves partially truncated page in the cache,
  * relying on struct inode::i_size to limit further accesses.
  */
-static void ll_invalidatepage(struct page *vmpage, unsigned long offset)
+static void ll_invalidatepage(struct page *vmpage, unsigned int offset,
+			      unsigned int length)
 {
 	struct inode     *inode;
 	struct lu_env    *env;
@@ -89,7 +90,7 @@ static void ll_invalidatepage(struct page *vmpage, unsigned long offset)
 	 * below because they are run with page locked and all our io is
 	 * happening with locked page too
 	 */
-	if (offset == 0) {
+	if (offset == 0 && length == PAGE_CACHE_SIZE) {
 		env = cl_env_get(&refcheck);
 		if (!IS_ERR(env)) {
 			inode = vmpage->mapping->host;

But then got these errors:

drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c: In function 'cfs_cpt_bind':
drivers/staging/lustre/lustre/libcfs/linux/linux-cpu.c:630:3: error: implicit declaration of function 'set_cpus_allowed' [-Werror=implicit-function-declaration]
   rc = set_cpus_allowed(current, *cpumask);
   ^
cc1: some warnings being treated as errors
drivers/staging/lustre/lustre/obdclass/lu_object.c: In function 'key_fini':
drivers/staging/lustre/lustre/obdclass/lu_object.c:1354:4: error: implicit declaration of function 'module_refcount' [-Werror=implicit-function-declaration]
    LINVRNT(module_refcount(key->lct_owner) > 0);
    ^
In file included from drivers/staging/lustre/include/linux/libcfs/libcfs.h:203:0,
                 from drivers/staging/lustre/lustre/obdclass/lu_object.c:47:
drivers/staging/lustre/lustre/obdclass/lu_object.c: In function 'lu_context_keys_dump':
drivers/staging/lustre/lustre/obdclass/lu_object.c:1936:42: error: dereferencing pointer to incomplete type
           key->lct_owner ? key->lct_owner->name : "",
                                          ^
drivers/staging/lustre/include/linux/libcfs/libcfs_debug.h:221:41: note: in definition of macro '__CDEBUG'
   libcfs_debug_msg(&msgdata, format, ## __VA_ARGS__);     \
                                         ^
drivers/staging/lustre/include/linux/libcfs/libcfs_debug.h:238:30: note: in expansion of macro 'CDEBUG_LIMIT'
 #define CERROR(format, ...)  CDEBUG_LIMIT(D_ERROR, format, ## __VA_ARGS__)
                              ^
drivers/staging/lustre/lustre/obdclass/lu_object.c:1932:4: note: in expansion of macro 'CERROR'
    CERROR("[%d]: %p %x (%p,%p,%p) %d %d \"%s\"@%p\n",
    ^
cc1: some warnings being treated as errors
drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c: In function 'ptlrpcd':
drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c:398:4: error: implicit declaration of function 'set_cpus_allowed' [-Werror=implicit-function-declaration]
    cfs_set_cpus_allowed(current,
    ^
cc1: some warnings being treated as errors

So I gave up and just reverted commit 52f6317528c6 ("staging/lustre: drop
CONFIG_BROKEN dependency") (thus disabling the code again) for now.
-- 
Cheers,
Stephen Rothwell                    sfr@xxxxxxxxxxxxxxxx

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