From: Arnd Bergmann <arnd@arndb.de>
To: Jan Kara <jack@suse.com>
Cc: "Arnd Bergmann" <arnd@arndb.de>,
"Dan Williams" <dan.j.williams@intel.com>,
"Ernesto A. Fernández" <ernesto.mnd.fernandez@gmail.com>,
"Andreas Dilger" <adilger@dilger.ca>,
"Andreas Gruenbacher" <agruenba@redhat.com>,
"Tejun Heo" <tj@kernel.org>,
linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] ext2: fix FS_IOMAP dependency
Date: Wed, 28 Feb 2018 14:36:46 +0100 [thread overview]
Message-ID: <20180228133659.1933887-1-arnd@arndb.de> (raw)
I ran into a randconfig link error on next-20180228 that appears to have
been caused by an older patch:
fs/ext2/inode.o: In function `ext2_setattr':
inode.c:(.text+0x19eb): undefined reference to `iomap_zero_range'
This adds a compile-time conditional around the code path so the
compiler can optimize out the reference in configurations that don't
need it anyway.
Fixes: 00697eed386d ("ext2: use iomap_zero_range() for zeroing truncated page in DAX path")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
fs/ext2/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 5d5e9f7b98d6..6e6db0ab3bd6 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1296,7 +1296,7 @@ static int ext2_setsize(struct inode *inode, loff_t newsize)
inode_dio_wait(inode);
- if (IS_DAX(inode)) {
+ if (IS_ENABLED(CONFIG_FS_DAX) && IS_DAX(inode)) {
error = iomap_zero_range(inode, newsize,
PAGE_ALIGN(newsize) - newsize, NULL,
&ext2_iomap_ops);
--
2.9.0
next reply other threads:[~2018-02-28 13:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-28 13:36 Arnd Bergmann [this message]
2018-02-28 16:28 ` [PATCH] ext2: fix FS_IOMAP dependency Jan Kara
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