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Linux 7.1: access dentry d_alias directly

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The d_u union introduced in 3.18 is now anonymous, so we need to detect
it and decide the right way to name d_alias.

Note that we used to have support for both names to support kernels
before 3.18, so this commit is effectively reverting the commit that
removed that support, efc293e371.

Sponsored-by: TrueNAS
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@truenas.com>
Closes #18471
This commit is contained in:
Rob Norris
2026-05-02 04:52:57 +10:00
committed by Tony Hutter
parent fc87e269e2
commit 65b4a5c551
3 changed files with 36 additions and 0 deletions
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config/kernel.m4
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@@ -73,6 +73,7 @@ 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_FS_CONTEXT
@@ -196,6 +197,7 @@ 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_FS_CONTEXT