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

Stephen Rothwell
2021-09-21T04:26:39Z

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Hi all,

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

fs/9p/vfs_file.c: In function 'v9fs_vm_page_mkwrite':
fs/9p/vfs_file.c:557:6: error: implicit declaration of function 'wait_on_page_bit_killable'; did you mean 'wait_on_page_locked_killable'? [-Werror=implicit-function-declaration]
557 | wait_on_page_bit_killable(page, PG_writeback) < 0)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
| wait_on_page_locked_killable

Caused by commit

be8f72914261 ("mm/filemap: Add folio_wait_bit()")

interacting with commit

82766b47b26c ("9p: (untested) Convert to using the netfs helper lib to do reads and caching")

from the fscache tree.

I have applied the following merge fix patch.

From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Tue, 21 Sep 2021 14:18:06 +1000
Subject: [PATCH] fix up for "9p: (untested) Convert to using the netfs helper
lib to do reads and caching"

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
fs/9p/vfs_file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 4b617d10cf28..68d05b2aa290 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -554,7 +554,7 @@ v9fs_vm_page_mkwrite(struct vm_fault *vmf)
#endif

if (PageWriteback(page) &&
- wait_on_page_bit_killable(page, PG_writeback) < 0)
+ folio_wait_bit_killable(page_folio(page), PG_writeback) < 0)
return VM_FAULT_RETRY;

/* Update file times before taking page lock */
--
2.32.0