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Properly ignore bdi_setup_and_register return value

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This broke compilation against Linux 3.13 and GCC 4.7.3.

Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1906
This commit is contained in:
Richard Yao 2013-11-25 12:21:21 -05:00 committed by Brian Behlendorf
parent 2e40f09410
commit 729210564a
1 changed files with 4 additions and 1 deletions
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5
config/kernel-bdi-setup-and-register.m4
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@ -1,12 +1,14 @@
dnl #
dnl # 2.6.34 API change
dnl # The bdi_setup_and_register() helper function is avilable and
dnl # The bdi_setup_and_register() helper function is available and
dnl # exported by the kernel. This is a trivial helper function but
dnl # using it significantly simplifies the code surrounding setting
dnl # up and tearing down the bdi structure.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER],
[AC_MSG_CHECKING([whether bdi_setup_and_register() is available])
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Wno-unused-result"
ZFS_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/backing-dev.h>
], [
@ -18,4 +20,5 @@ AC_DEFUN([ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER],
], [
AC_MSG_RESULT(no)
])
EXTRA_KCFLAGS="$tmp_flags"
])