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Fix build for Linux 6.18 with PowerPC/RISC-V kernels. (#18145)

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The macro 'flush_dcache_page(...)' modifies the page flags, but in Linux
6.18 the type of the page flags changed from 'unsigned long' to the
struct type 'memdesc_flags_t' with a single member 'f' which is the page
flags field.

Signed-off-by: Erik Larsson <catacombae@gmail.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
This commit is contained in:
Erik Larsson
2026-02-03 00:16:10 +02:00
committed by Tony Hutter
parent 2328b37eb9
commit 8a9bbaa7cf
2 changed files with 42 additions and 4 deletions
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config/kernel-mm-page-flags.m4
+27
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@@ -16,9 +16,36 @@ AC_DEFUN([ZFS_AC_KERNEL_MM_PAGE_FLAG_ERROR], [
])
])
dnl #
dnl # Linux 6.18+ uses a struct typedef (memdesc_flags_t) instead of an
dnl # 'unsigned long' for the 'flags' field in 'struct page'.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_MM_PAGE_FLAGS_STRUCT], [
ZFS_LINUX_TEST_SRC([mm_page_flags_struct], [
#include <linux/mm.h>
static const struct page p __attribute__ ((unused)) = {
.flags = { .f = 0 }
};
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_MM_PAGE_FLAGS_STRUCT], [
AC_MSG_CHECKING([whether 'flags' in 'struct page' is a struct])
ZFS_LINUX_TEST_RESULT([mm_page_flags_struct], [
AC_MSG_RESULT([yes])
AC_DEFINE(HAVE_MM_PAGE_FLAGS_STRUCT, 1,
['flags' in 'struct page' is a struct])
],[
AC_MSG_RESULT([no])
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_MM_PAGE_FLAGS], [
ZFS_AC_KERNEL_SRC_MM_PAGE_FLAG_ERROR
ZFS_AC_KERNEL_SRC_MM_PAGE_FLAGS_STRUCT
])
AC_DEFUN([ZFS_AC_KERNEL_MM_PAGE_FLAGS], [
ZFS_AC_KERNEL_MM_PAGE_FLAG_ERROR
ZFS_AC_KERNEL_MM_PAGE_FLAGS_STRUCT
])