mirror_zfs/config/kernel-d-make-root.m4

dnl #
dnl # 3.4.0 API change
dnl # Added d_make_root() to replace previous d_alloc_root() function.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_D_MAKE_ROOT], [
	ZFS_CHECK_SYMBOL_EXPORT(
		[d_make_root],
		[fs/dcache.c],
		[AC_DEFINE(HAVE_D_MAKE_ROOT, 1,
		[d_make_root() is available])],
		[])
])
Linux 3.4 compat, d_make_root() replaces d_alloc_root() torvalds/linux@adc0e91ab142abe93f5b0d7980ada8a7676231fe introduced introduced d_make_root() as a replacement for d_alloc_root(). Further commits appear to have removed d_alloc_root() from the Linux source tree. This causes the following failure: error: implicit declaration of function 'd_alloc_root' [-Werror=implicit-function-declaration] To correct this we update the code to use the current d_make_root() interface for readability. Then we introduce an autotools check to determine if d_make_root() is available. If it isn't then we define some compatibility logic which used the older d_alloc_root() interface. Signed-off-by: Richard Yao <ryao@gentoo.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #776 2012-06-06 21:08:00 +04:00			`dnl #`
			`dnl # 3.4.0 API change`
			`dnl # Added d_make_root() to replace previous d_alloc_root() function.`
			`dnl #`
			`AC_DEFUN([ZFS_AC_KERNEL_D_MAKE_ROOT], [`
			`ZFS_CHECK_SYMBOL_EXPORT(`
			`[d_make_root],`
			`[fs/dcache.c],`
			`[AC_DEFINE(HAVE_D_MAKE_ROOT, 1,`
			`[d_make_root() is available])],`
			`[])`
			`])`