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dnl #
dnl # Linux 5.16 no longer allows directly calling wait_on_page_bit, and
dnl # instead requires you to call folio-specific functions. In this case,
dnl # wait_on_page_bit(pg, PG_writeback) becomes
dnl # folio_wait_bit(pg, PG_writeback)
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_PAGEMAP_FOLIO_WAIT_BIT], [
ZFS_LINUX_TEST_SRC([pagemap_has_folio_wait_bit], [
#include <linux/pagemap.h>
],[
static struct folio *f = NULL;
folio_wait_bit(f, PG_writeback);
])
])
AC_DEFUN([ZFS_AC_KERNEL_PAGEMAP_FOLIO_WAIT_BIT], [
AC_MSG_CHECKING([whether folio_wait_bit() exists])
ZFS_LINUX_TEST_RESULT([pagemap_has_folio_wait_bit], [
AC_MSG_RESULT([yes])
AC_DEFINE(HAVE_PAGEMAP_FOLIO_WAIT_BIT, 1,
[folio_wait_bit() exists])
],[
AC_MSG_RESULT([no])
])
])
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