diff options
Diffstat (limited to 'config/kernel-inode-lock.m4')
| -rw-r--r-- | config/kernel-inode-lock.m4 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/config/kernel-inode-lock.m4 b/config/kernel-inode-lock.m4 new file mode 100644 index 000000000..2cc06a5ec --- /dev/null +++ b/config/kernel-inode-lock.m4 @@ -0,0 +1,23 @@ +dnl # +dnl # 4.7 API change +dnl # i_mutex is changed to i_rwsem. Instead of directly using +dnl # i_mutex/i_rwsem, we should use inode_lock() and inode_lock_shared() +dnl # We test inode_lock_shared because inode_lock is introduced earlier. +dnl # +AC_DEFUN([SPL_AC_INODE_LOCK], [ + AC_MSG_CHECKING([whether inode_lock_shared() exists]) + tmp_flags="$EXTRA_KCFLAGS" + EXTRA_KCFLAGS="-Werror" + SPL_LINUX_TRY_COMPILE([ + #include <linux/fs.h> + ],[ + struct inode *inode = NULL; + inode_lock_shared(inode); + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_INODE_LOCK_SHARED, 1, [yes]) + ],[ + AC_MSG_RESULT(no) + ]) + EXTRA_KCFLAGS="$tmp_flags" +]) |