config/kernel-flush_dcache_page.m4

   1 dnl #
   2 dnl # Starting from Linux 5.13, flush_dcache_page() becomes an inline
   3 dnl # function and may indirectly referencing GPL-only cpu_feature_keys on
   4 dnl # powerpc
   5 dnl #
   6
   7 dnl #
   8 dnl # Checking if flush_dcache_page is exported GPL-only
   9 dnl #
  10 AC_DEFUN([ZFS_AC_KERNEL_SRC_FLUSH_DCACHE_PAGE], [
  11         ZFS_LINUX_TEST_SRC([flush_dcache_page], [
  12                 #include <asm/cacheflush.h>
  13         ], [
  14                 flush_dcache_page(0);
  15         ], [], [ZFS_META_LICENSE])
  16 ])
  17 AC_DEFUN([ZFS_AC_KERNEL_FLUSH_DCACHE_PAGE], [
  18         AC_MSG_CHECKING([whether flush_dcache_page() is GPL-only])
  19         ZFS_LINUX_TEST_RESULT([flush_dcache_page_license], [
  20                 AC_MSG_RESULT(no)
  21         ], [
  22                 AC_MSG_RESULT(yes)
  23                 AC_DEFINE(HAVE_FLUSH_DCACHE_PAGE_GPL_ONLY, 1,
  24                     [flush_dcache_page() is GPL-only])
  25         ])
  26 ])