From 13a49aaf0d5c43bce08135edaabb65587e1a8031 Mon Sep 17 00:00:00 2001
From: Cheyenne Wills <cwills@sinenomine.net>
Date: Mon, 17 Aug 2020 08:20:11 -0600
Subject: [PATCH] LINUX 5.9: Remove HAVE_UNLOCKED_IOCTL/COMPAT_IOCTL

Linux-5.9-rc1 commit 'fs: remove the HAVE_UNLOCKED_IOCTL and
HAVE_COMPAT_IOCTL defines' (4e24566a) removed the two referenced macros
from the kernel.

The support for unlocked_ioctl and compat_ioctl were introduced in
Linux 2.6.11.

Remove references to HAVE_UNLOCKED_IOCTL and HAVE_COMPAT_IOCTL using
the assumption that they were always defined.


Notes:

With this change, building against kernels 2.6.10 and older will fail.
RHEL4 (EOL in March 2017) used a 2.6.9 kernel.  RHEL5 uses a 2.6.18
kernel.

In linux-2.6.33-rc1 the commit messages for "staging: comedi:
Remove check for HAVE_UNLOCKED_IOCTL" (00a1855c) and "Staging: comedi:
remove check for HAVE_COMPAT_IOCTL" (5d7ae225) both state that all new
kernels have support for unlocked_ioctl/compat_ioctl so the checks can
be removed along with removing support for older kernels.

Change-Id: Idd2716f3573ea455f8a5e1535bca584af0787717
Reviewed-on: https://gerrit.openafs.org/14300
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Tested-by: Benjamin Kaduk <kaduk@mit.edu>
---
 src/afs/LINUX/osi_ioctl.c    | 25 ++-----------------------
 src/afs/LINUX/osi_vnodeops.c | 14 --------------
 2 files changed, 2 insertions(+), 37 deletions(-)

diff --git a/src/afs/LINUX/osi_ioctl.c b/src/afs/LINUX/osi_ioctl.c
index 1646a15..9ba076a 100644
--- a/src/afs/LINUX/osi_ioctl.c
+++ b/src/afs/LINUX/osi_ioctl.c
@@ -25,10 +25,6 @@
 #include <asm/ia32_unistd.h>
 #endif
 
-#if defined(AFS_SPARC64_LINUX26_ENV) && defined(NEED_IOCTL32) && !defined(HAVE_COMPAT_IOCTL)
-#include <linux/ioctl32.h>
-#endif
-
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/sched.h>
@@ -37,9 +33,6 @@
 #include "osi_compat.h"
 
 extern struct proc_dir_entry *openafs_procfs;
-#if defined(NEED_IOCTL32) && !defined(HAVE_COMPAT_IOCTL)
-static int ioctl32_done;
-#endif
 
 extern asmlinkage long
 afs_syscall(long syscall, long parm1, long parm2, long parm3, long parm4);
@@ -85,12 +78,11 @@ afs_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
     }
 }
 
-#if defined(HAVE_UNLOCKED_IOCTL) || defined(HAVE_COMPAT_IOCTL)
 static long afs_unlocked_ioctl(struct file *file, unsigned int cmd,
                                unsigned long arg) {
     return afs_ioctl(FILE_INODE(file), file, cmd, arg);
 }
-#endif
+
 #if defined(HAVE_LINUX_STRUCT_PROC_OPS)
 static struct proc_ops afs_syscall_ops = {
     .proc_ioctl = afs_unlocked_ioctl,
@@ -100,16 +92,11 @@ static struct proc_ops afs_syscall_ops = {
 };
 #else
 static struct file_operations afs_syscall_ops = {
-# ifdef HAVE_UNLOCKED_IOCTL
     .unlocked_ioctl = afs_unlocked_ioctl,
-# else
-    .ioctl = afs_ioctl,
-# endif
-# ifdef HAVE_COMPAT_IOCTL
     .compat_ioctl = afs_unlocked_ioctl,
-# endif
 };
 #endif /* HAVE_LINUX_STRUCT_PROC_OPS */
+
 void
 osi_ioctl_init(void)
 {
@@ -121,18 +108,10 @@ osi_ioctl_init(void)
 	entry->owner = THIS_MODULE;
 #endif
 
-#if defined(NEED_IOCTL32) && !defined(HAVE_COMPAT_IOCTL)
-    if (register_ioctl32_conversion(VIOC_SYSCALL32, NULL) == 0) 
-	ioctl32_done = 1;
-#endif
 }
 
 void
 osi_ioctl_clean(void)
 {
     remove_proc_entry(PROC_SYSCALL_NAME, openafs_procfs);
-#if defined(NEED_IOCTL32) && !defined(HAVE_COMPAT_IOCTL)
-    if (ioctl32_done)
-	    unregister_ioctl32_conversion(VIOC_SYSCALL32);
-#endif
 }
diff --git a/src/afs/LINUX/osi_vnodeops.c b/src/afs/LINUX/osi_vnodeops.c
index d9bc952..8d6946f 100644
--- a/src/afs/LINUX/osi_vnodeops.c
+++ b/src/afs/LINUX/osi_vnodeops.c
@@ -589,13 +589,11 @@ out1:
 extern int afs_xioctl(struct inode *ip, struct file *fp, unsigned int com,
 		      unsigned long arg);
 
-#if defined(HAVE_UNLOCKED_IOCTL) || defined(HAVE_COMPAT_IOCTL)
 static long afs_unlocked_xioctl(struct file *fp, unsigned int com,
                                unsigned long arg) {
     return afs_xioctl(FILE_INODE(fp), fp, com, arg);
 
 }
-#endif
 
 
 static int
@@ -891,14 +889,8 @@ struct file_operations afs_dir_fops = {
 #else
   .readdir =	afs_linux_readdir,
 #endif
-#ifdef HAVE_UNLOCKED_IOCTL
   .unlocked_ioctl = afs_unlocked_xioctl,
-#else
-  .ioctl =	afs_xioctl,
-#endif
-#ifdef HAVE_COMPAT_IOCTL
   .compat_ioctl = afs_unlocked_xioctl,
-#endif
   .open =	afs_linux_open,
   .release =	afs_linux_release,
   .llseek =	default_llseek,
@@ -926,14 +918,8 @@ struct file_operations afs_file_fops = {
   .read =	afs_linux_read,
   .write =	afs_linux_write,
 #endif
-#ifdef HAVE_UNLOCKED_IOCTL
   .unlocked_ioctl = afs_unlocked_xioctl,
-#else
-  .ioctl =	afs_xioctl,
-#endif
-#ifdef HAVE_COMPAT_IOCTL
   .compat_ioctl = afs_unlocked_xioctl,
-#endif
   .mmap =	afs_linux_mmap,
   .open =	afs_linux_open,
   .flush =	afs_linux_flush,
-- 
1.9.4