diff options
Diffstat (limited to 'config')
| -rw-r--r-- | config/spl-build.m4 | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/config/spl-build.m4 b/config/spl-build.m4 index eef52334f..2514d8c5b 100644 --- a/config/spl-build.m4 +++ b/config/spl-build.m4 @@ -94,6 +94,7 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [ SPL_AC_2ARGS_VFS_GETATTR SPL_AC_USLEEP_RANGE SPL_AC_KMEM_CACHE_ALLOCFLAGS + SPL_AC_WAIT_ON_BIT ]) AC_DEFUN([SPL_AC_MODULE_SYMVERS], [ @@ -2570,3 +2571,28 @@ AC_DEFUN([SPL_AC_KMEM_CACHE_ALLOCFLAGS], [ ]) ]) ]) + +dnl # +dnl # 3.17 API change, +dnl # wait_on_bit() no longer requires an action argument. The former +dnl # "wait_on_bit" interface required an 'action' function to be provided +dnl # which does the actual waiting. There were over 20 such functions in the +dnl # kernel, many of them identical, though most cases can be satisfied by one +dnl # of just two functions: one which uses io_schedule() and one which just +dnl # uses schedule(). This API change was made to consolidate all of those +dnl # redundant wait functions. +dnl # +AC_DEFUN([SPL_AC_WAIT_ON_BIT], [ + AC_MSG_CHECKING([whether wait_on_bit() takes an action]) + SPL_LINUX_TRY_COMPILE([ + #include <linux/wait.h> + ],[ + int (*action)(void *) = NULL; + wait_on_bit(NULL, 0, action, 0); + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_WAIT_ON_BIT_ACTION, 1, [yes]) + ],[ + AC_MSG_RESULT(no) + ]) +]) |