| dnl # |
| dnl # ZERO_PAGE() is an alias for emtpy_zero_page. On certain architectures |
| dnl # this is a GPL exported variable. |
| dnl # |
| |
| dnl # |
| dnl # Checking if ZERO_PAGE is exported GPL-only |
| dnl # |
| AC_DEFUN([ZFS_AC_KERNEL_SRC_ZERO_PAGE], [ |
| ZFS_LINUX_TEST_SRC([zero_page], [ |
| #include <asm/pgtable.h> |
| ], [ |
| struct page *p __attribute__ ((unused)); |
| p = ZERO_PAGE(0); |
| ], [], [ZFS_META_LICENSE]) |
| ]) |
| |
| AC_DEFUN([ZFS_AC_KERNEL_ZERO_PAGE], [ |
| AC_MSG_CHECKING([whether ZERO_PAGE() is GPL-only]) |
| ZFS_LINUX_TEST_RESULT([zero_page_license], [ |
| AC_MSG_RESULT(no) |
| ], [ |
| AC_MSG_RESULT(yes) |
| AC_DEFINE(HAVE_ZERO_PAGE_GPL_ONLY, 1, |
| [ZERO_PAGE() is GPL-only]) |
| ]) |
| ]) |
