mirror_zfs/config/kernel-totalram-pages-func.m4
Rob Norris 85391ee931 build: add SPDX license tags to build system files
Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #18077
2026-01-08 15:08:03 -08:00

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dnl # SPDX-License-Identifier: CDDL-1.0
dnl #
dnl # Linux 5.0: totalram_pages is no longer a global variable, and must be
dnl # read via the totalram_pages() helper function.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_TOTALRAM_PAGES_FUNC], [
ZFS_LINUX_TEST_SRC([totalram_pages], [
#include <linux/mm.h>
],[
unsigned long pages __attribute__ ((unused));
pages = totalram_pages();
])
])
AC_DEFUN([ZFS_AC_KERNEL_TOTALRAM_PAGES_FUNC], [
AC_MSG_CHECKING([whether totalram_pages() exists])
ZFS_LINUX_TEST_RESULT([totalram_pages], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_TOTALRAM_PAGES_FUNC, 1,
[kernel has totalram_pages()])
],[
AC_MSG_RESULT(no)
])
])