zfs-builds-mm/zfs-0.8.2/config/kernel-kuid-helpers.m4
2019-10-24 23:13:56 +02:00

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Text

dnl #
dnl # 3.5 API change,
dnl # Since usernamespaces were introduced in kernel version 3.5, it
dnl # became necessary to go through one more level of indirection
dnl # when dealing with uid/gid - namely the kuid type.
dnl #
dnl #
AC_DEFUN([ZFS_AC_KERNEL_KUID_HELPERS], [
AC_MSG_CHECKING([whether i_(uid|gid)_(read|write) exist])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
struct inode *ip = NULL;
(void) i_uid_read(ip);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KUID_HELPERS, 1,
[i_(uid|gid)_(read|write) exist])
],[
AC_MSG_RESULT(no)
])
])