mirror_zfs/config/kernel-pagemap-folio_wait_bit.m4

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])
	])
])
Linux 5.16: wait_on_page_bit() no longer available to modules Instead, linux/pagemap.h offers a number of folio-specific functions to be called instead. In this case, module/os/linux/zfs/zfs_vnops_os.c wants to call wait_on_page_bit(pp, PG_writeback). This gets replaced with folio_wait_bit(folio_page(pp), PG_writeback). This change modifies the code to conditionally compile that if configure identifies th presence of the folio_wait_bit() function. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Coleman Kane <ckane@colemankane.org> Closes #12800 2021-11-16 08:10:35 +03:00			`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], [`
autoconf: AC_MSG_CHECKING consistency Make the wording more consistent for the kernel AC_MSG_CHECKING output (e.g. "checking whether ...".). Additionally, group some of the VFS interface checks with the others. No functional change. Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Attila Fülöp <attila@fueloep.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #13529 2022-06-01 02:42:49 +03:00			`AC_MSG_CHECKING([whether folio_wait_bit() exists])`
Linux 5.16: wait_on_page_bit() no longer available to modules Instead, linux/pagemap.h offers a number of folio-specific functions to be called instead. In this case, module/os/linux/zfs/zfs_vnops_os.c wants to call wait_on_page_bit(pp, PG_writeback). This gets replaced with folio_wait_bit(folio_page(pp), PG_writeback). This change modifies the code to conditionally compile that if configure identifies th presence of the folio_wait_bit() function. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Coleman Kane <ckane@colemankane.org> Closes #12800 2021-11-16 08:10:35 +03:00			`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])`
			`])`
			`])`