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dnl #
dnl # Check for pin_user_pages_unlocked().
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_PIN_USER_PAGES], [
ZFS_LINUX_TEST_SRC([pin_user_pages_unlocked], [
#include <linux/mm.h>
],[
unsigned long start = 0;
unsigned long nr_pages = 1;
struct page **pages = NULL;
unsigned int gup_flags = 0;
long ret __attribute__ ((unused));
ret = pin_user_pages_unlocked(start, nr_pages, pages,
gup_flags);
])
])
AC_DEFUN([ZFS_AC_KERNEL_PIN_USER_PAGES], [
dnl #
dnl # Kernal 5.8 introduced the pin_user_pages* interfaces which should
dnl # be used for Direct I/O requests.
dnl #
AC_MSG_CHECKING([whether pin_user_pages_unlocked() is available])
ZFS_LINUX_TEST_RESULT([pin_user_pages_unlocked], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_PIN_USER_PAGES_UNLOCKED, 1,
[pin_user_pages_unlocked() is available])
],[
AC_MSG_RESULT(no)
])
])
|
