[kernel/ksyms.c kernel/sched.c],[
AC_DEFINE(HAVE_SHOW_TASK, 1, [show_task is exported])
],[
+ LB_CHECK_SYMBOL_EXPORT([sched_show_task],
+ [kernel/ksyms.c kernel/sched.c],[
+ AC_DEFINE(HAVE_SCHED_SHOW_TASK, 1, [sched_show_task is exported])
+ ],[])
])
])
])
])
+#2.6.23 has new shrinker API
+AC_DEFUN([LC_REGISTER_SHRINKER],
+[AC_MSG_CHECKING([if kernel has register_shrinker])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+],[
+ register_shrinker(NULL);
+], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_REGISTER_SHRINKER, 1,
+ [kernel has register_shrinker])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
# 2.6.24
AC_DEFUN([LIBCFS_NETLINK_CBMUTEX],
[AC_MSG_CHECKING([for mutex in netlink_kernel_create])
#
AC_DEFUN([LIBCFS_FUNC_DUMP_TRACE],
[LB_CHECK_SYMBOL_EXPORT([dump_trace],
-[kernel/ksyms.c arch/${LINUX_ARCH%_64}/kernel/traps_64.c],[
+[kernel/ksyms.c arch/${LINUX_ARCH%_64}/kernel/traps_64.c arch/x86/kernel/dumpstack_32.c arch/x86/kernel/dumpstack_64.c],[
tmp_flags="$EXTRA_KCFLAGS"
EXTRA_KCFLAGS="-Werror"
AC_MSG_CHECKING([whether we can really use dump_trace])
#include <asm/stacktrace.h>
],[
struct stacktrace_ops ops;
-
ops.address = print_addr;
],[
AC_MSG_RESULT(yes)
AC_MSG_RESULT(no)
],[
])
+ AC_MSG_CHECKING([dump_trace want address])
+ LB_LINUX_TRY_COMPILE([
+ struct task_struct;
+ struct pt_regs;
+ #include <asm/stacktrace.h>
+ ],[
+ dump_trace(NULL, NULL, NULL, 0, NULL, NULL);
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_DUMP_TRACE_ADDRESS, 1,
+ [dump_trace want address argument])
+ ],[
+ AC_MSG_RESULT(no)
+ ],[
+ ])
+
EXTRA_KCFLAGS="$tmp_flags"
])
])
])
])
+AC_DEFUN([LIBCFS_HAVE_OOM_H],
+[LB_CHECK_FILE([$LINUX/include/linux/oom.h], [
+ AC_DEFINE(HAVE_LINUX_OOM_H, 1,
+ [kernel has include/oom.h])
+],[
+ AC_MSG_RESULT([no])
+])
+])
+
+# 2.6.18 store oom parameters in task struct.
+# 2.6.32 store oom parameters in signal struct
+AC_DEFUN([LIBCFS_OOMADJ_IN_SIG],
+[AC_MSG_CHECKING([kernel store oom parameters in task])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/sched.h>
+],[
+ struct signal_struct s;
+
+ s.oom_adj = 0;
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_OOMADJ_IN_SIG, 1,
+ [kernel store a oom parameters in signal struct])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+#
+# LIBCFS_ADD_WAIT_QUEUE_EXCLUSIVE
+#
+# 2.6.34 adds __add_wait_queue_exclusive
+#
+AC_DEFUN([LIBCFS_ADD_WAIT_QUEUE_EXCLUSIVE],
+[AC_MSG_CHECKING([if __add_wait_queue_exclusive exists])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/wait.h>
+],[
+ wait_queue_head_t queue;
+ wait_queue_t wait;
+
+ __add_wait_queue_exclusive(&queue, &wait);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE___ADD_WAIT_QUEUE_EXCLUSIVE, 1,
+ [__add_wait_queue_exclusive exists])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# RHEL6/2.6.32 want to have pointer to shrinker self pointer in handler function
+AC_DEFUN([LC_SHRINKER_WANT_SHRINK_PTR],
+[AC_MSG_CHECKING([shrinker want self pointer in handler])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/mm.h>
+],[
+ struct shrinker tmp = {0};
+ tmp.shrink(NULL, 0, 0);
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_SHRINKER_WANT_SHRINK_PTR, 1,
+ [shrinker want self pointer in handler])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
#
# LIBCFS_PROG_LINUX
#
# 2.6.23
LIBCFS_KMEM_CACHE_CREATE_DTOR
LIBCFS_NETLINK_CBMUTEX
+LC_REGISTER_SHRINKER
# 2.6.24
LIBCFS_SYSCTL_UNNUMBERED
LIBCFS_SCATTERLIST_SETPAGE
LIBCFS_SOCK_MAP_FD_2ARG
# 2.6.32
LIBCFS_STACKTRACE_OPS_HAVE_WALK_STACK
+LC_SHRINKER_WANT_SHRINK_PTR
+LIBCFS_HAVE_OOM_H
+LIBCFS_OOMADJ_IN_SIG
+# 2.6.34
+LIBCFS_ADD_WAIT_QUEUE_EXCLUSIVE
])
#