tracehook: Remove tracehook.h

Now that all of the definitions have moved out of tracehook.h into
ptrace.h, sched/signal.h, resume_user_mode.h there is nothing left in
tracehook.h so remove it.

Update the few files that were depending upon tracehook.h to bring in
definitions to use the headers they need directly.

Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lkml.kernel.org/r/20220309162454.123006-13-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

MAINTAINERS

@@ -15623,7 +15623,6 @@ F:	arch/*/ptrace*.c
 F:	include/asm-generic/syscall.h
 F:	include/linux/ptrace.h
 F:	include/linux/regset.h
-F:	include/linux/tracehook.h
 F:	include/uapi/linux/ptrace.h
 F:	include/uapi/linux/ptrace.h
 F:	kernel/ptrace.c

arch/s390/include/asm/entry-common.h

@@ -5,7 +5,6 @@
 #include <linux/sched.h>
 #include <linux/audit.h>
 #include <linux/randomize_kstack.h>
-#include <linux/tracehook.h>
 #include <linux/processor.h>
 #include <linux/uaccess.h>
 #include <asm/timex.h>

arch/s390/kernel/ptrace.c

@@ -21,7 +21,6 @@
 #include <linux/signal.h>
 #include <linux/elf.h>
 #include <linux/regset.h>
-#include <linux/tracehook.h>
 #include <linux/seccomp.h>
 #include <linux/compat.h>
 #include <trace/syscall.h>

arch/s390/kernel/signal.c

@@ -25,7 +25,6 @@
 #include <linux/tty.h>
 #include <linux/personality.h>
 #include <linux/binfmts.h>
-#include <linux/tracehook.h>
 #include <linux/syscalls.h>
 #include <linux/compat.h>
 #include <asm/ucontext.h>

arch/x86/kernel/ptrace.c

@@ -13,7 +13,6 @@
 #include <linux/errno.h>
 #include <linux/slab.h>
 #include <linux/ptrace.h>
-#include <linux/tracehook.h>
 #include <linux/user.h>
 #include <linux/elf.h>
 #include <linux/security.h>

arch/x86/kernel/signal.c

@@ -18,7 +18,6 @@
 #include <linux/kstrtox.h>
 #include <linux/errno.h>
 #include <linux/wait.h>
-#include <linux/tracehook.h>
 #include <linux/unistd.h>
 #include <linux/stddef.h>
 #include <linux/personality.h>

fs/coredump.c

@@ -31,7 +31,6 @@
 #include <linux/tsacct_kern.h>
 #include <linux/cn_proc.h>
 #include <linux/audit.h>
-#include <linux/tracehook.h>
 #include <linux/kmod.h>
 #include <linux/fsnotify.h>
 #include <linux/fs_struct.h>

fs/exec.c

@@ -56,7 +56,6 @@
 #include <linux/tsacct_kern.h>
 #include <linux/cn_proc.h>
 #include <linux/audit.h>
-#include <linux/tracehook.h>
 #include <linux/kmod.h>
 #include <linux/fsnotify.h>
 #include <linux/fs_struct.h>

fs/io-wq.c

@@ -13,7 +13,7 @@
 #include <linux/slab.h>
 #include <linux/rculist_nulls.h>
 #include <linux/cpu.h>
-#include <linux/tracehook.h>
+#include <linux/task_work.h>
 #include <linux/audit.h>
 #include <uapi/linux/io_uring.h>
 

fs/io_uring.c

@@ -78,7 +78,6 @@
 #include <linux/task_work.h>
 #include <linux/pagemap.h>
 #include <linux/io_uring.h>
-#include <linux/tracehook.h>
 #include <linux/audit.h>
 #include <linux/security.h>
 

fs/proc/array.c

@@ -88,7 +88,6 @@
 #include <linux/pid_namespace.h>
 #include <linux/prctl.h>
 #include <linux/ptrace.h>
-#include <linux/tracehook.h>
 #include <linux/string_helpers.h>
 #include <linux/user_namespace.h>
 #include <linux/fs_struct.h>

fs/proc/base.c

@@ -74,7 +74,6 @@
 #include <linux/mount.h>
 #include <linux/security.h>
 #include <linux/ptrace.h>
-#include <linux/tracehook.h>
 #include <linux/printk.h>
 #include <linux/cache.h>
 #include <linux/cgroup.h>

include/linux/tracehook.h

@@ -1,56 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Tracing hooks
- *
- * Copyright (C) 2008-2009 Red Hat, Inc.  All rights reserved.
- *
- * This file defines hook entry points called by core code where
- * user tracing/debugging support might need to do something.  These
- * entry points are called tracehook_*().  Each hook declared below
- * has a detailed kerneldoc comment giving the context (locking et
- * al) from which it is called, and the meaning of its return value.
- *
- * Each function here typically has only one call site, so it is ok
- * to have some nontrivial tracehook_*() inlines.  In all cases, the
- * fast path when no tracing is enabled should be very short.
- *
- * The purpose of this file and the tracehook_* layer is to consolidate
- * the interface that the kernel core and arch code uses to enable any
- * user debugging or tracing facility (such as ptrace).  The interfaces
- * here are carefully documented so that maintainers of core and arch
- * code do not need to think about the implementation details of the
- * tracing facilities.  Likewise, maintainers of the tracing code do not
- * need to understand all the calling core or arch code in detail, just
- * documented circumstances of each call, such as locking conditions.
- *
- * If the calling core code changes so that locking is different, then
- * it is ok to change the interface documented here.  The maintainer of
- * core code changing should notify the maintainers of the tracing code
- * that they need to work out the change.
- *
- * Some tracehook_*() inlines take arguments that the current tracing
- * implementations might not necessarily use.  These function signatures
- * are chosen to pass in all the information that is on hand in the
- * caller and might conceivably be relevant to a tracer, so that the
- * core code won't have to be updated when tracing adds more features.
- * If a call site changes so that some of those parameters are no longer
- * already on hand without extra work, then the tracehook_* interface
- * can change so there is no make-work burden on the core code.  The
- * maintainer of core code changing should notify the maintainers of the
- * tracing code that they need to work out the change.
- */
-
-#ifndef _LINUX_TRACEHOOK_H
-#define _LINUX_TRACEHOOK_H	1
-
-#include <linux/sched.h>
-#include <linux/ptrace.h>
-#include <linux/security.h>
-#include <linux/task_work.h>
-#include <linux/memcontrol.h>
-#include <linux/blk-cgroup.h>
-struct linux_binprm;
-
-
-
-#endif	/* <linux/tracehook.h> */

kernel/exit.c

@@ -49,7 +49,8 @@
 #include <linux/audit.h> /* for audit_free() */
 #include <linux/resource.h>
 #include <linux/task_io_accounting_ops.h>
-#include <linux/tracehook.h>
+#include <linux/blkdev.h>
+#include <linux/task_work.h>
 #include <linux/fs_struct.h>
 #include <linux/init_task.h>
 #include <linux/perf_event.h>

kernel/livepatch/transition.c

@@ -9,7 +9,6 @@
 
 #include <linux/cpu.h>
 #include <linux/stacktrace.h>
-#include <linux/tracehook.h>
 #include "core.h"
 #include "patch.h"
 #include "transition.h"

kernel/seccomp.c

@@ -39,7 +39,6 @@
 #include <linux/pid.h>
 #include <linux/ptrace.h>
 #include <linux/capability.h>
-#include <linux/tracehook.h>
 #include <linux/uaccess.h>
 #include <linux/anon_inodes.h>
 #include <linux/lockdep.h>

kernel/signal.c

@@ -32,7 +32,7 @@
 #include <linux/signal.h>
 #include <linux/signalfd.h>
 #include <linux/ratelimit.h>
-#include <linux/tracehook.h>
+#include <linux/task_work.h>
 #include <linux/capability.h>
 #include <linux/freezer.h>
 #include <linux/pid_namespace.h>

security/apparmor/domain.c

@@ -14,7 +14,6 @@
 #include <linux/file.h>
 #include <linux/mount.h>
 #include <linux/syscalls.h>
-#include <linux/tracehook.h>
 #include <linux/personality.h>
 #include <linux/xattr.h>
 #include <linux/user_namespace.h>

security/selinux/hooks.c

@@ -25,7 +25,6 @@
 #include <linux/kd.h>
 #include <linux/kernel.h>
 #include <linux/kernel_read_file.h>
-#include <linux/tracehook.h>
 #include <linux/errno.h>
 #include <linux/sched/signal.h>
 #include <linux/sched/task.h>