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authorArnd Bergmann <arnd@arndb.de>2016-07-22 09:50:55 +1000
committerDave Chinner <david@fromorbit.com>2016-07-22 09:50:55 +1000
commitf021bd071f06b545926b1031348873b05442139f (patch)
treebb6d3a60a3c9bcfcb1c8c5f63d63847b065b418e /fs/xfs/xfs_file.c
parent99579ccec4e271c3d4d4e7c946058766812afdab (diff)
xfs: remove dax code from object file when disabled
We check IS_DAX(inode) before calling either xfs_file_dax_read or xfs_file_dax_write, and this will lead the call being optimized out at compile time when CONFIG_FS_DAX is disabled. However, the two functions are marked STATIC, so they become global symbols when CONFIG_XFS_DEBUG is set, leaving us with two unused global functions that call into an undefined function and a broken "allmodconfig" build: fs/built-in.o: In function `xfs_file_dax_read': fs/xfs/xfs_file.c:348: undefined reference to `dax_do_io' fs/built-in.o: In function `xfs_file_dax_write': fs/xfs/xfs_file.c:758: undefined reference to `dax_do_io' Marking the two functions 'static noinline' instead of 'STATIC' will let the compiler drop the symbols when there are no callers but avoid the implicit inlining. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 16d4d43595b4 ("xfs: split direct I/O and DAX path") Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_file.c')
-rw-r--r--fs/xfs/xfs_file.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index d97e8cb99a59..49fc9aca92d5 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -370,7 +370,7 @@ xfs_file_dio_aio_read(
return ret;
}
-STATIC ssize_t
+static noinline ssize_t
xfs_file_dax_read(
struct kiocb *iocb,
struct iov_iter *to)
@@ -875,7 +875,7 @@ out:
return ret;
}
-STATIC ssize_t
+static noinline ssize_t
xfs_file_dax_write(
struct kiocb *iocb,
struct iov_iter *from)