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Linux 6.11: add compat macro for page_mapping() 

Since the change to folios it has just been a wrapper anyway. Linux has
removed their wrapper, so we add one.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Sponsored-by: https://despairlabs.com/sponsor/
Closes #16400
This commit is contained in:
Rob Norris 2024-07-31 18:43:39 +10:00 committed by Tony Hutter
parent 11ad6124c3
commit 8156099cf2
5 changed files with 46 additions and 17 deletions
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17
config/kernel-mm-page-size.m4
View File

@ -1,17 +0,0 @@
AC_DEFUN([ZFS_AC_KERNEL_SRC_MM_PAGE_SIZE], [
ZFS_LINUX_TEST_SRC([page_size], [
#include <linux/mm.h>
],[
unsigned long s;
s = page_size(NULL);
])
])
AC_DEFUN([ZFS_AC_KERNEL_MM_PAGE_SIZE], [
AC_MSG_CHECKING([whether page_size() is available])
ZFS_LINUX_TEST_RESULT([page_size], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_MM_PAGE_SIZE, 1, [page_size() is available])
],[
AC_MSG_RESULT(no)
])
])

36
config/kernel-mm-pagemap.m4 Normal file
View File

@ -0,0 +1,36 @@
AC_DEFUN([ZFS_AC_KERNEL_SRC_MM_PAGE_SIZE], [
ZFS_LINUX_TEST_SRC([page_size], [
#include <linux/mm.h>
],[
unsigned long s;
s = page_size(NULL);
])
])
AC_DEFUN([ZFS_AC_KERNEL_MM_PAGE_SIZE], [
AC_MSG_CHECKING([whether page_size() is available])
ZFS_LINUX_TEST_RESULT([page_size], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_MM_PAGE_SIZE, 1, [page_size() is available])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_MM_PAGE_MAPPING], [
ZFS_LINUX_TEST_SRC([page_mapping], [
#include <linux/pagemap.h>
],[
struct page *p = NULL;
struct address_space *m = page_mapping(NULL);
])
])
AC_DEFUN([ZFS_AC_KERNEL_MM_PAGE_MAPPING], [
AC_MSG_CHECKING([whether page_mapping() is available])
ZFS_LINUX_TEST_RESULT([page_mapping], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_MM_PAGE_MAPPING, 1, [page_mapping() is available])
],[
AC_MSG_RESULT(no)
])
])

2
config/kernel.m4
View File

@ -170,6 +170,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
ZFS_AC_KERNEL_SRC_COPY_SPLICE_READ
ZFS_AC_KERNEL_SRC_SYNC_BDEV
ZFS_AC_KERNEL_SRC_MM_PAGE_SIZE
ZFS_AC_KERNEL_SRC_MM_PAGE_MAPPING
case "$host_cpu" in
powerpc*)
ZFS_AC_KERNEL_SRC_CPU_HAS_FEATURE
@ -322,6 +323,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
ZFS_AC_KERNEL_COPY_SPLICE_READ
ZFS_AC_KERNEL_SYNC_BDEV
ZFS_AC_KERNEL_MM_PAGE_SIZE
ZFS_AC_KERNEL_MM_PAGE_MAPPING
case "$host_cpu" in
powerpc*)
ZFS_AC_KERNEL_CPU_HAS_FEATURE

7
include/os/linux/kernel/linux/mm_compat.h
View File

@ -21,16 +21,23 @@
/*
* Copyright (c) 2023, 2024, Klara Inc.
* Copyright (c) 2024, Rob Norris <robn@despairlabs.com>
*/
#ifndef _ZFS_MM_COMPAT_H
#define _ZFS_MM_COMPAT_H
#include <linux/mm.h>
#include <linux/pagemap.h>
/* 5.4 introduced page_size(). Older kernels can use a trivial macro instead */
#ifndef HAVE_MM_PAGE_SIZE
#define page_size(p) ((unsigned long)(PAGE_SIZE << compound_order(p)))
#endif
/* 6.11 removed page_mapping(). A simple wrapper around folio_mapping() works */
#ifndef HAVE_MM_PAGE_MAPPING
#define page_mapping(p) folio_mapping(page_folio(p))
#endif
#endif /* _ZFS_MM_COMPAT_H */

1
module/os/linux/zfs/zfs_vnops_os.c
View File

@ -69,6 +69,7 @@
#include <sys/zpl.h>
#include <sys/zil.h>
#include <sys/sa_impl.h>
#include <linux/mm_compat.h>
/*
* Programming rules.