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Add cv_timedwait_io()

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Add missing helper function cv_timedwait_io(), it should be used
when waiting on IO with a specified timeout.

Reviewed-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #674
This commit is contained in:
Brian Behlendorf
2018-01-24 11:33:47 -08:00
committed by GitHub
parent fb79036f28
commit 23602fdb39
3 changed files with 73 additions and 8 deletions
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config/spl-build.m4
+21
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@@ -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