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