1dnl # 2dnl # Starting from Linux 5.13, flush_dcache_page() becomes an inline 3dnl # function and may indirectly referencing GPL-only cpu_feature_keys on 4dnl # powerpc 5dnl # 6 7dnl # 8dnl # Checking if flush_dcache_page is exported GPL-only 9dnl # 10AC_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]) 17AC_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]) 27