Retire MUTEX_OWNER checks

[mirror_spl.git] / config / spl-build.m4

diff --git a/config/spl-build.m4 b/config/spl-build.m4
index d2cb68b6b4990a3d848688cc238ce57545bdb8db..4b55809ce09de09e74fa178af9c947d0b8416a09 100644 (file)
--- a/config/spl-build.m4
+++ b/config/spl-build.m4
@@ -25,8 +25,6 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
        SPL_AC_SHRINKER_CALLBACK
        SPL_AC_CTL_NAME
        SPL_AC_PDE_DATA
-       SPL_AC_MUTEX_OWNER
-       SPL_AC_MUTEX_OWNER_TASK_STRUCT
        SPL_AC_SET_FS_PWD_WITH_CONST
        SPL_AC_2ARGS_VFS_UNLINK
        SPL_AC_4ARGS_VFS_RENAME
@@ -865,54 +863,6 @@ AC_DEFUN([SPL_AC_CTL_NAME], [
        ])
 ])
 
-dnl #
-dnl # 2.6.29 API change,
-dnl # Adaptive mutexs were introduced which track the mutex owner.  The
-dnl # mutex wrappers leverage this functionality to avoid tracking the
-dnl # owner multipe times.
-dnl #
-AC_DEFUN([SPL_AC_MUTEX_OWNER], [
-       AC_MSG_CHECKING([whether struct mutex has owner])
-       SPL_LINUX_TRY_COMPILE([
-               #include <linux/mutex.h>
-       ],[
-               struct mutex mtx __attribute__ ((unused));
-               mtx.owner = NULL;
-       ],[
-               AC_MSG_RESULT(yes)
-               AC_DEFINE(HAVE_MUTEX_OWNER, 1, [struct mutex has owner])
-       ],[
-               AC_MSG_RESULT(no)
-       ])
-])
-
-dnl #
-dnl # 2.6.39 API change,
-dnl # Owner type change.  A Linux mutex prior to 2.6.39 would store
-dnl # the owner as a thread_info pointer when CONFIG_DEBUG_MUTEXES
-dnl # was defined.  As of 2.6.39 this was changed to a task_struct
-dnl # pointer which frankly makes a lot more sense.
-dnl #
-AC_DEFUN([SPL_AC_MUTEX_OWNER_TASK_STRUCT], [
-       AC_MSG_CHECKING([whether struct mutex owner is a task_struct])
-       tmp_flags="$EXTRA_KCFLAGS"
-       EXTRA_KCFLAGS="-Werror"
-       SPL_LINUX_TRY_COMPILE([
-               #include <linux/mutex.h>
-               #include <linux/sched.h>
-       ],[
-               struct mutex mtx __attribute__ ((unused));
-               mtx.owner = current;
-       ],[
-               AC_MSG_RESULT(yes)
-               AC_DEFINE(HAVE_MUTEX_OWNER_TASK_STRUCT, 1,
-               [struct mutex owner is a task_struct])
-       ],[
-               AC_MSG_RESULT(no)
-       ])
-       EXTRA_KCFLAGS="$tmp_flags"
-])
-
 dnl #
 dnl # 3.10 API change,
 dnl # PDE is replaced by PDE_DATA