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Linux 6.11: avoid passing "end" sentinel to register_sysctl()

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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 21:39:31 +10:00
committed by Brian Behlendorf
parent 3abffc8781
commit 2633075e09
3 changed files with 66 additions and 3 deletions
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config/kernel-register_sysctl_table.m4
+26
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@@ -26,6 +26,32 @@ AC_DEFUN([ZFS_AC_KERNEL_REGISTER_SYSCTL_TABLE], [
])
])
dnl #
dnl # Linux 6.11 register_sysctl() enforces that sysctl tables no longer
dnl # supply a sentinel end-of-table element. 6.6 introduces
dnl # register_sysctl_sz() to enable callers to choose, so we use it if
dnl # available for backward compatibility.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_REGISTER_SYSCTL_SZ], [
ZFS_LINUX_TEST_SRC([has_register_sysctl_sz], [
#include <linux/sysctl.h>
],[
struct ctl_table test_table[] __attribute__((unused)) = {0};
register_sysctl_sz("", test_table, 0);
])
])
AC_DEFUN([ZFS_AC_KERNEL_REGISTER_SYSCTL_SZ], [
AC_MSG_CHECKING([whether register_sysctl_sz exists])
ZFS_LINUX_TEST_RESULT([has_register_sysctl_sz], [
AC_MSG_RESULT([yes])
AC_DEFINE(HAVE_REGISTER_SYSCTL_SZ, 1,
[register_sysctl_sz exists])
],[
AC_MSG_RESULT([no])
])
])
dnl #
dnl # Linux 6.11 makes const the ctl_table arg of proc_handler
dnl #