Add cv_timedwait_io()

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

diff --git a/config/spl-build.m4 b/config/spl-build.m4
index 926abd5c8b4916c0f30136b03ab7d989d417756b..afc8de65fa241deb2f3b08da5fd9a99e8587c0d0 100644 (file)
--- a/config/spl-build.m4
+++ b/config/spl-build.m4
@@ -52,6 +52,7 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
        SPL_AC_KMEM_CACHE_CREATE_USERCOPY
        SPL_AC_WAIT_QUEUE_ENTRY_T
        SPL_AC_WAIT_QUEUE_HEAD_ENTRY
+       SPL_AC_IO_SCHEDULE_TIMEOUT
        SPL_AC_KERNEL_WRITE
        SPL_AC_KERNEL_READ
        SPL_AC_KERNEL_TIMER_FUNCTION_TIMER_LIST
@@ -1598,6 +1599,26 @@ AC_DEFUN([SPL_AC_WAIT_QUEUE_HEAD_ENTRY], [
        ])
 ])
 
+dnl #
+dnl # 3.19 API change
+dnl # The io_schedule_timeout() function is present in all 2.6.32 kernels
+dnl # but it was not exported until Linux 3.19.  The RHEL 7.x kernels which
+dnl # are based on a 3.10 kernel do export this symbol.
+dnl #
+AC_DEFUN([SPL_AC_IO_SCHEDULE_TIMEOUT], [
+       AC_MSG_CHECKING([whether io_schedule_timeout() is available])
+       SPL_LINUX_TRY_COMPILE_SYMBOL([
+               #include <linux/sched.h>
+       ], [
+               (void) io_schedule_timeout(1);
+       ], [io_schedule_timeout], [], [
+               AC_MSG_RESULT(yes)
+               AC_DEFINE(HAVE_IO_SCHEDULE_TIMEOUT, 1, [yes])
+       ],[
+               AC_MSG_RESULT(no)
+       ])
+])
+
 dnl #
 dnl # 4.14 API change
 dnl # kernel_write() which was introduced in 3.9 was updated to take