76 lines
1.9 KiB
Plaintext
76 lines
1.9 KiB
Plaintext
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_RWSEM_SPINLOCK_IS_RAW], [
|
|
AC_MSG_CHECKING([whether struct rw_semaphore member wait_lock is raw])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
ZFS_LINUX_TRY_COMPILE([
|
|
#include <linux/rwsem.h>
|
|
],[
|
|
struct rw_semaphore dummy_semaphore __attribute__ ((unused));
|
|
raw_spinlock_t dummy_lock __attribute__ ((unused)) =
|
|
__RAW_SPIN_LOCK_INITIALIZER(dummy_lock);
|
|
dummy_semaphore.wait_lock = dummy_lock;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(RWSEM_SPINLOCK_IS_RAW, 1,
|
|
[struct rw_semaphore member wait_lock is raw_spinlock_t])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 3.16 API Change
|
|
dnl #
|
|
dnl # rwsem-spinlock "->activity" changed to "->count"
|
|
dnl #
|
|
AC_DEFUN([ZFS_AC_KERNEL_RWSEM_ACTIVITY], [
|
|
AC_MSG_CHECKING([whether struct rw_semaphore has member activity])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
ZFS_LINUX_TRY_COMPILE([
|
|
#include <linux/rwsem.h>
|
|
],[
|
|
struct rw_semaphore dummy_semaphore __attribute__ ((unused));
|
|
dummy_semaphore.activity = 0;
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_RWSEM_ACTIVITY, 1,
|
|
[struct rw_semaphore has member activity])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|
|
|
|
dnl #
|
|
dnl # 4.8 API Change
|
|
dnl #
|
|
dnl # rwsem "->count" changed to atomic_long_t type
|
|
dnl #
|
|
AC_DEFUN([ZFS_AC_KERNEL_RWSEM_ATOMIC_LONG_COUNT], [
|
|
AC_MSG_CHECKING(
|
|
[whether struct rw_semaphore has atomic_long_t member count])
|
|
tmp_flags="$EXTRA_KCFLAGS"
|
|
EXTRA_KCFLAGS="-Werror"
|
|
ZFS_LINUX_TRY_COMPILE([
|
|
#include <linux/rwsem.h>
|
|
],[
|
|
DECLARE_RWSEM(dummy_semaphore);
|
|
(void) atomic_long_read(&dummy_semaphore.count);
|
|
],[
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_RWSEM_ATOMIC_LONG_COUNT, 1,
|
|
[struct rw_semaphore has atomic_long_t member count])
|
|
],[
|
|
AC_MSG_RESULT(no)
|
|
])
|
|
EXTRA_KCFLAGS="$tmp_flags"
|
|
])
|