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dnl #
dnl # 3.1 API Change
dnl #
dnl # The rw_semaphore.wait_lock member was changed from spinlock_t to
dnl # raw_spinlock_t at commit ddb6c9b58a19edcfac93ac670b066c836ff729f1.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_RWSEM_SPINLOCK_IS_RAW], [
ZFS_LINUX_TEST_SRC([rwsem_spinlock_is_raw], [
#include <linux/rwsem.h>
],[
struct rw_semaphore dummy_semaphore __attribute__ ((unused));
raw_spinlock_t dummy_lock __attribute__ ((unused)) =
__RAW_SPIN_LOCK_INITIALIZER(dummy_lock);
dummy_semaphore.wait_lock = dummy_lock;
])
])
AC_DEFUN([ZFS_AC_KERNEL_RWSEM_SPINLOCK_IS_RAW], [
AC_MSG_CHECKING([whether struct rw_semaphore member wait_lock is raw])
ZFS_LINUX_TEST_RESULT([rwsem_spinlock_is_raw], [
AC_MSG_RESULT(yes)
AC_DEFINE(RWSEM_SPINLOCK_IS_RAW, 1,
[struct rw_semaphore member wait_lock is raw_spinlock_t])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 3.16 API Change
dnl #
dnl # rwsem-spinlock "->activity" changed to "->count"
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_RWSEM_ACTIVITY], [
ZFS_LINUX_TEST_SRC([rwsem_activity], [
#include <linux/rwsem.h>
],[
struct rw_semaphore dummy_semaphore __attribute__ ((unused));
dummy_semaphore.activity = 0;
])
])
AC_DEFUN([ZFS_AC_KERNEL_RWSEM_ACTIVITY], [
AC_MSG_CHECKING([whether struct rw_semaphore has member activity])
ZFS_LINUX_TEST_RESULT([rwsem_activity], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_RWSEM_ACTIVITY, 1,
[struct rw_semaphore has member activity])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.8 API Change
dnl #
dnl # rwsem "->count" changed to atomic_long_t type
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_RWSEM_ATOMIC_LONG_COUNT], [
ZFS_LINUX_TEST_SRC([rwsem_atomic_long_count], [
#include <linux/rwsem.h>
],[
DECLARE_RWSEM(dummy_semaphore);
(void) atomic_long_read(&dummy_semaphore.count);
])
])
AC_DEFUN([ZFS_AC_KERNEL_RWSEM_ATOMIC_LONG_COUNT], [
AC_MSG_CHECKING(
[whether struct rw_semaphore has atomic_long_t member count])
ZFS_LINUX_TEST_RESULT([rwsem_atomic_long_count], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_RWSEM_ATOMIC_LONG_COUNT, 1,
[struct rw_semaphore has atomic_long_t member count])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_RWSEM], [
ZFS_AC_KERNEL_SRC_RWSEM_SPINLOCK_IS_RAW
ZFS_AC_KERNEL_SRC_RWSEM_ACTIVITY
ZFS_AC_KERNEL_SRC_RWSEM_ATOMIC_LONG_COUNT
])
AC_DEFUN([ZFS_AC_KERNEL_RWSEM], [
ZFS_AC_KERNEL_RWSEM_SPINLOCK_IS_RAW
ZFS_AC_KERNEL_RWSEM_ACTIVITY
ZFS_AC_KERNEL_RWSEM_ATOMIC_LONG_COUNT
])
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