180 lines
4.9 KiB
Plaintext
180 lines
4.9 KiB
Plaintext
dnl #
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dnl # get_user_pages_unlocked() function was not available till 4.0.
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dnl # In earlier kernels (< 4.0) get_user_pages() is available().
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dnl #
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dnl # 4.0 API change,
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dnl # long get_user_pages_unlocked(struct task_struct *tsk,
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dnl # struct mm_struct *mm, unsigned long start, unsigned long nr_pages,
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dnl # int write, int force, struct page **pages)
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dnl #
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dnl # 4.8 API change,
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dnl # long get_user_pages_unlocked(unsigned long start,
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dnl # unsigned long nr_pages, int write, int force, struct page **page)
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dnl #
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dnl # 4.9 API change,
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dnl # long get_user_pages_unlocked(usigned long start, int nr_pages,
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dnl # struct page **pages, unsigned int gup_flags)
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dnl #
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dnl#
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dnl# Check available get_user_pages/_unlocked interfaces.
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dnl#
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AC_DEFUN([ZFS_AC_KERNEL_SRC_GET_USER_PAGES], [
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ZFS_LINUX_TEST_SRC([get_user_pages_unlocked_gup_flags], [
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#include <linux/mm.h>
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], [
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unsigned long start = 0;
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unsigned long nr_pages = 1;
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unsigned int gup_flags = 0;
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struct page **pages = NULL;
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long ret __attribute__ ((unused));
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ret = get_user_pages_unlocked(start, nr_pages, pages,
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gup_flags);
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])
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ZFS_LINUX_TEST_SRC([get_user_pages_unlocked_write_flag], [
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#include <linux/mm.h>
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], [
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unsigned long start = 0;
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unsigned long nr_pages = 1;
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int write = 0;
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int force = 0;
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long ret __attribute__ ((unused));
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struct page **pages = NULL;
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ret = get_user_pages_unlocked(start, nr_pages, write, force,
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pages);
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])
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ZFS_LINUX_TEST_SRC([get_user_pages_unlocked_task_struct], [
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#include <linux/mm.h>
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], [
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struct task_struct *tsk = NULL;
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struct mm_struct *mm = NULL;
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unsigned long start = 0;
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unsigned long nr_pages = 1;
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int write = 0;
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int force = 0;
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struct page **pages = NULL;
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long ret __attribute__ ((unused));
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ret = get_user_pages_unlocked(tsk, mm, start, nr_pages, write,
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force, pages);
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])
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ZFS_LINUX_TEST_SRC([get_user_pages_unlocked_task_struct_gup_flags], [
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#include <linux/mm.h>
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], [
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struct task_struct *tsk = NULL;
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struct mm_struct *mm = NULL;
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unsigned long start = 0;
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unsigned long nr_pages = 1;
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struct page **pages = NULL;
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unsigned int gup_flags = 0;
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long ret __attribute__ ((unused));
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ret = get_user_pages_unlocked(tsk, mm, start, nr_pages,
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pages, gup_flags);
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])
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ZFS_LINUX_TEST_SRC([get_user_pages_task_struct], [
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#include <linux/mm.h>
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], [
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struct task_struct *tsk = NULL;
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struct mm_struct *mm = NULL;
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struct vm_area_struct **vmas = NULL;
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unsigned long start = 0;
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unsigned long nr_pages = 1;
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int write = 0;
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int force = 0;
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struct page **pages = NULL;
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int ret __attribute__ ((unused));
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ret = get_user_pages(tsk, mm, start, nr_pages, write,
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force, pages, vmas);
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])
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])
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dnl #
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dnl # Supported get_user_pages/_unlocked interfaces checked newest to oldest.
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dnl # We first check for get_user_pages_unlocked as that is available in
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dnl # newer kernels.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_GET_USER_PAGES], [
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dnl #
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dnl # Current API (as of 4.9) of get_user_pages_unlocked
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dnl #
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AC_MSG_CHECKING([whether get_user_pages_unlocked() takes gup flags])
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ZFS_LINUX_TEST_RESULT([get_user_pages_unlocked_gup_flags], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_GET_USER_PAGES_UNLOCKED_GUP_FLAGS, 1,
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[get_user_pages_unlocked() takes gup flags])
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], [
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AC_MSG_RESULT(no)
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dnl #
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dnl # 4.8 API change, get_user_pages_unlocked
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dnl #
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AC_MSG_CHECKING(
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[whether get_user_pages_unlocked() takes write flag])
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ZFS_LINUX_TEST_RESULT([get_user_pages_unlocked_write_flag], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_GET_USER_PAGES_UNLOCKED_WRITE_FLAG, 1,
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[get_user_pages_unlocked() takes write flag])
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], [
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AC_MSG_RESULT(no)
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dnl #
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dnl # 4.0-4.3, 4.5-4.7 API, get_user_pages_unlocked
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dnl #
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AC_MSG_CHECKING(
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[whether get_user_pages_unlocked() takes task_struct])
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ZFS_LINUX_TEST_RESULT(
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[get_user_pages_unlocked_task_struct], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(
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HAVE_GET_USER_PAGES_UNLOCKED_TASK_STRUCT, 1,
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[get_user_pages_unlocked() takes task_struct])
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], [
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AC_MSG_RESULT(no)
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dnl #
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dnl # 4.4 API, get_user_pages_unlocked
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dnl #
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AC_MSG_CHECKING(
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[whether get_user_pages_unlocked() takes task_struct, gup_flags])
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ZFS_LINUX_TEST_RESULT(
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[get_user_pages_unlocked_task_struct_gup_flags], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(
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HAVE_GET_USER_PAGES_UNLOCKED_TASK_STRUCT_GUP_FLAGS, 1,
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[get_user_pages_unlocked() takes task_struct, gup_flags])
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], [
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AC_MSG_RESULT(no)
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dnl #
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dnl # get_user_pages
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dnl #
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AC_MSG_CHECKING(
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[whether get_user_pages() takes struct task_struct])
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ZFS_LINUX_TEST_RESULT(
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[get_user_pages_task_struct], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(
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HAVE_GET_USER_PAGES_TASK_STRUCT, 1,
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[get_user_pages() takes task_struct])
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], [
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dnl #
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dnl # If we cannot map the user's
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dnl # pages in then we cannot do
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dnl # Direct I/O
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dnl #
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ZFS_LINUX_TEST_ERROR([Direct I/O])
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])
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])
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])
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])
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])
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])
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