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-rw-r--r--config/kernel-dentry-alias.m430
-rw-r--r--config/kernel.m42
2 files changed, 32 insertions, 0 deletions
diff --git a/config/kernel-dentry-alias.m4 b/config/kernel-dentry-alias.m4
new file mode 100644
index 000000000000..f0ddb8d010b0
--- /dev/null
+++ b/config/kernel-dentry-alias.m4
@@ -0,0 +1,30 @@
+dnl #
+dnl # 3.18 API change
+dnl # Dentry aliases are in d_u struct dentry member
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_SRC_DENTRY_ALIAS_D_U], [
+ ZFS_LINUX_TEST_SRC([dentry_alias_d_u], [
+ #include <linux/fs.h>
+ #include <linux/dcache.h>
+ #include <linux/list.h>
+ ], [
+ struct inode *inode __attribute__ ((unused)) = NULL;
+ struct dentry *dentry __attribute__ ((unused)) = NULL;
+ hlist_for_each_entry(dentry, &inode->i_dentry,
+ d_u.d_alias) {
+ d_drop(dentry);
+ }
+ ])
+])
+
+AC_DEFUN([ZFS_AC_KERNEL_DENTRY_ALIAS_D_U], [
+ AC_MSG_CHECKING([whether dentry aliases are in d_u member])
+ ZFS_LINUX_TEST_RESULT([dentry_alias_d_u], [
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_DENTRY_D_U_ALIASES, 1,
+ [dentry aliases are in d_u member])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+])
+
diff --git a/config/kernel.m4 b/config/kernel.m4
index d4d13ddd1d1a..b573881c4400 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -96,6 +96,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
ZFS_AC_KERNEL_SRC_SETATTR_PREPARE
ZFS_AC_KERNEL_SRC_INSERT_INODE_LOCKED
ZFS_AC_KERNEL_SRC_DENTRY
+ ZFS_AC_KERNEL_SRC_DENTRY_ALIAS_D_U
ZFS_AC_KERNEL_SRC_TRUNCATE_SETSIZE
ZFS_AC_KERNEL_SRC_SECURITY_INODE
ZFS_AC_KERNEL_SRC_FST_MOUNT
@@ -217,6 +218,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
ZFS_AC_KERNEL_SETATTR_PREPARE
ZFS_AC_KERNEL_INSERT_INODE_LOCKED
ZFS_AC_KERNEL_DENTRY
+ ZFS_AC_KERNEL_DENTRY_ALIAS_D_U
ZFS_AC_KERNEL_TRUNCATE_SETSIZE
ZFS_AC_KERNEL_SECURITY_INODE
ZFS_AC_KERNEL_FST_MOUNT