[PATCH v2 2/4] copy_process: pass clone_flags as u64 across calltree

Simon Schuster via B4 Relay
2025-09-01T13:10:49Z

From: Simon Schuster <schuster.simon@siemens-energy.com>

With the introduction of clone3 in commit 7f192e3cd316 ("fork: add
clone3") the effective bit width of clone_flags on all architectures was
increased from 32-bit to 64-bit, with a new type of u64 for the flags.
However, for most consumers of clone_flags the interface was not
changed from the previous type of unsigned long.

While this works fine as long as none of the new 64-bit flag bits
(CLONE_CLEAR_SIGHAND and CLONE_INTO_CGROUP) are evaluated, this is still
undesirable in terms of the principle of least surprise.

Thus, this commit fixes all relevant interfaces of callees to
sys_clone3/copy_process (excluding the architecture-specific
copy_thread) to consistently pass clone_flags as u64, so that
no truncation to 32-bit integers occurs on 32-bit architectures.

Signed-off-by: Simon Schuster <schuster.simon@siemens-energy.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
---
block/blk-ioc.c | 2 +-
fs/namespace.c | 2 +-
include/linux/cgroup.h | 4 ++--
include/linux/cred.h | 2 +-
include/linux/iocontext.h | 6 +++---
include/linux/ipc_namespace.h | 4 ++--
include/linux/lsm_hook_defs.h | 2 +-
include/linux/mnt_namespace.h | 2 +-
include/linux/nsproxy.h | 2 +-
include/linux/pid_namespace.h | 4 ++--
include/linux/rseq.h | 4 ++--
include/linux/sched/task.h | 2 +-
include/linux/security.h | 4 ++--
include/linux/sem.h | 4 ++--
include/linux/time_namespace.h | 4 ++--
include/linux/uprobes.h | 4 ++--
include/linux/user_events.h | 4 ++--
include/linux/utsname.h | 4 ++--
include/net/net_namespace.h | 4 ++--
include/trace/events/task.h | 6 +++---
ipc/namespace.c | 2 +-
ipc/sem.c | 2 +-
kernel/cgroup/namespace.c | 2 +-
kernel/cred.c | 2 +-
kernel/events/uprobes.c | 2 +-
kernel/fork.c | 8 ++++----
kernel/nsproxy.c | 4 ++--
kernel/pid_namespace.c | 2 +-
kernel/sched/core.c | 4 ++--
kernel/sched/fair.c | 2 +-
kernel/sched/sched.h | 4 ++--
kernel/time/namespace.c | 2 +-
kernel/utsname.c | 2 +-
net/core/net_namespace.c | 2 +-
security/apparmor/lsm.c | 2 +-
security/security.c | 2 +-
security/selinux/hooks.c | 2 +-
security/tomoyo/tomoyo.c | 2 +-
38 files changed, 59 insertions(+), 59 deletions(-)

diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index 9fda3906e5f5..d15918d7fabb 100644
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -286,7 +286,7 @@ int set_task_ioprio(struct task_struct *task, int ioprio)
}
EXPORT_SYMBOL_GPL(set_task_ioprio);

-int __copy_io(unsigned long clone_flags, struct task_struct *tsk)
+int __copy_io(u64 clone_flags, struct task_struct *tsk)
{
struct io_context *ioc = current->io_context;

diff --git a/fs/namespace.c b/fs/namespace.c
index 4b352a44cb80..0cd875b38552 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -4202,7 +4202,7 @@ static struct mnt_namespace *alloc_mnt_ns(struct user_namespace *user_ns, bool a
}

__latent_entropy
-struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns,
+struct mnt_namespace *copy_mnt_ns(u64 flags, struct mnt_namespace *ns,
struct user_namespace *user_ns, struct fs_struct *new_fs)
{
struct mnt_namespace *new_ns;
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index ae73dbb19165..15ed7a8f0abb 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -801,7 +801,7 @@ extern struct cgroup_namespace init_cgroup_ns;

void free_cgroup_ns(struct cgroup_namespace *ns);

-struct cgroup_namespace *copy_cgroup_ns(unsigned long flags,
+struct cgroup_namespace *copy_cgroup_ns(u64 flags,
struct user_namespace *user_ns,
struct cgroup_namespace *old_ns);

@@ -823,7 +823,7 @@ static inline void put_cgroup_ns(struct cgroup_namespace *ns)

static inline void free_cgroup_ns(struct cgroup_namespace *ns) { }
static inline struct cgroup_namespace *
-copy_cgroup_ns(unsigned long flags, struct user_namespace *user_ns,
+copy_cgroup_ns(u64 flags, struct user_namespace *user_ns,
struct cgroup_namespace *old_ns)
{
return old_ns;
diff --git a/include/linux/cred.h b/include/linux/cred.h
index a102a10f833f..89ae50ad2ace 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -148,7 +148,7 @@ struct cred {

extern void __put_cred(struct cred *);
extern void exit_creds(struct task_struct *);
-extern int copy_creds(struct task_struct *, unsigned long);
+extern int copy_creds(struct task_struct *, u64);
extern const struct cred *get_task_cred(struct task_struct *);
extern struct cred *cred_alloc_blank(void);
extern struct cred *prepare_creds(void);
diff --git a/include/linux/iocontext.h b/include/linux/iocontext.h
index 14f7eaf1b443..079d8773790c 100644
--- a/include/linux/iocontext.h
+++ b/include/linux/iocontext.h
@@ -118,8 +118,8 @@ struct task_struct;
#ifdef CONFIG_BLOCK
void put_io_context(struct io_context *ioc);
void exit_io_context(struct task_struct *task);
-int __copy_io(unsigned long clone_flags, struct task_struct *tsk);
-static inline int copy_io(unsigned long clone_flags, struct task_struct *tsk)
+int __copy_io(u64 clone_flags, struct task_struct *tsk);
+static inline int copy_io(u64 clone_flags, struct task_struct *tsk)
{
if (!current->io_context)
return 0;
@@ -129,7 +129,7 @@ static inline int copy_io(unsigned long clone_flags, struct task_struct *tsk)
struct io_context;
static inline void put_io_context(struct io_context *ioc) { }
static inline void exit_io_context(struct task_struct *task) { }
-static inline int copy_io(unsigned long clone_flags, struct task_struct *tsk)
+static inline int copy_io(u64 clone_flags, struct task_struct *tsk)
{
return 0;
}
diff --git a/include/linux/ipc_namespace.h b/include/linux/ipc_namespace.h
index e8240cf2611a..4b399893e2b3 100644
--- a/include/linux/ipc_namespace.h
+++ b/include/linux/ipc_namespace.h
@@ -129,7 +129,7 @@ static inline int mq_init_ns(struct ipc_namespace *ns) { return 0; }
#endif

#if defined(CONFIG_IPC_NS)
-extern struct ipc_namespace *copy_ipcs(unsigned long flags,
+extern struct ipc_namespace *copy_ipcs(u64 flags,
struct user_namespace *user_ns, struct ipc_namespace *ns);

static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)
@@ -151,7 +151,7 @@ static inline struct ipc_namespace *get_ipc_ns_not_zero(struct ipc_namespace *ns

extern void put_ipc_ns(struct ipc_namespace *ns);
#else
-static inline struct ipc_namespace *copy_ipcs(unsigned long flags,
+static inline struct ipc_namespace *copy_ipcs(u64 flags,
struct user_namespace *user_ns, struct ipc_namespace *ns)
{
if (flags & CLONE_NEWIPC)
diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
index fd11fffdd3c3..adbe234a6f6c 100644
--- a/include/linux/lsm_hook_defs.h
+++ b/include/linux/lsm_hook_defs.h
@@ -211,7 +211,7 @@ LSM_HOOK(int, 0, file_open, struct file *file)
LSM_HOOK(int, 0, file_post_open, struct file *file, int mask)
LSM_HOOK(int, 0, file_truncate, struct file *file)
LSM_HOOK(int, 0, task_alloc, struct task_struct *task,
- unsigned long clone_flags)
+ u64 clone_flags)
LSM_HOOK(void, LSM_RET_VOID, task_free, struct task_struct *task)
LSM_HOOK(int, 0, cred_alloc_blank, struct cred *cred, gfp_t gfp)
LSM_HOOK(void, LSM_RET_VOID, cred_free, struct cred *cred)
diff --git a/include/linux/mnt_namespace.h b/include/linux/mnt_namespace.h
index 70b366b64816..ff290c87b2e7 100644
--- a/include/linux/mnt_namespace.h
+++ b/include/linux/mnt_namespace.h
@@ -11,7 +11,7 @@ struct fs_struct;
struct user_namespace;
struct ns_common;

-extern struct mnt_namespace *copy_mnt_ns(unsigned long, struct mnt_namespace *,
+extern struct mnt_namespace *copy_mnt_ns(u64, struct mnt_namespace *,
struct user_namespace *, struct fs_struct *);
extern void put_mnt_ns(struct mnt_namespace *ns);
DEFINE_FREE(put_mnt_ns, struct mnt_namespace *, if (!IS_ERR_OR_NULL(_T)) put_mnt_ns(_T))
diff --git a/include/linux/nsproxy.h b/include/linux/nsproxy.h
index dab6a1734a22..82533e899ff4 100644
--- a/include/linux/nsproxy.h
+++ b/include/linux/nsproxy.h
@@ -103,7 +103,7 @@ static inline struct cred *nsset_cred(struct nsset *set)
*
*/

-int copy_namespaces(unsigned long flags, struct task_struct *tsk);
+int copy_namespaces(u64 flags, struct task_struct *tsk);
void exit_task_namespaces(struct task_struct *tsk);
void switch_task_namespaces(struct task_struct *tsk, struct nsproxy *new);
int exec_task_namespaces(void);
diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h
index 7c67a5811199..0620a3e08e83 100644
--- a/include/linux/pid_namespace.h
+++ b/include/linux/pid_namespace.h
@@ -78,7 +78,7 @@ static inline int pidns_memfd_noexec_scope(struct pid_namespace *ns)
}
#endif

-extern struct pid_namespace *copy_pid_ns(unsigned long flags,
+extern struct pid_namespace *copy_pid_ns(u64 flags,
struct user_namespace *user_ns, struct pid_namespace *ns);
extern void zap_pid_ns_processes(struct pid_namespace *pid_ns);
extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd);
@@ -97,7 +97,7 @@ static inline int pidns_memfd_noexec_scope(struct pid_namespace *ns)
return 0;
}

-static inline struct pid_namespace *copy_pid_ns(unsigned long flags,
+static inline struct pid_namespace *copy_pid_ns(u64 flags,
struct user_namespace *user_ns, struct pid_namespace *ns)
{
if (flags & CLONE_NEWPID)
diff --git a/include/linux/rseq.h b/include/linux/rseq.h
index bc8af3eb5598..a96fd345aa38 100644
--- a/include/linux/rseq.h
+++ b/include/linux/rseq.h
@@ -65,7 +65,7 @@ static inline void rseq_migrate(struct task_struct *t)
* If parent process has a registered restartable sequences area, the
* child inherits. Unregister rseq for a clone with CLONE_VM set.
*/
-static inline void rseq_fork(struct task_struct *t, unsigned long clone_flags)
+static inline void rseq_fork(struct task_struct *t, u64 clone_flags)
{
if (clone_flags & CLONE_VM) {
t->rseq = NULL;
@@ -107,7 +107,7 @@ static inline void rseq_preempt(struct task_struct *t)
static inline void rseq_migrate(struct task_struct *t)
{
}
-static inline void rseq_fork(struct task_struct *t, unsigned long clone_flags)
+static inline void rseq_fork(struct task_struct *t, u64 clone_flags)
{
}
static inline void rseq_execve(struct task_struct *t)
diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h
index ea41795a352b..34d6a0e108c3 100644
--- a/include/linux/sched/task.h
+++ b/include/linux/sched/task.h
@@ -63,7 +63,7 @@ extern int lockdep_tasklist_lock_is_held(void);
extern asmlinkage void schedule_tail(struct task_struct *prev);
extern void init_idle(struct task_struct *idle, int cpu);

-extern int sched_fork(unsigned long clone_flags, struct task_struct *p);
+extern int sched_fork(u64 clone_flags, struct task_struct *p);
extern int sched_cgroup_fork(struct task_struct *p, struct kernel_clone_args *kargs);
extern void sched_cancel_fork(struct task_struct *p);
extern void sched_post_fork(struct task_struct *p);
diff --git a/include/linux/security.h b/include/linux/security.h
index 521bcb5b9717..9a1d4a6c8673 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -489,7 +489,7 @@ int security_file_receive(struct file *file);
int security_file_open(struct file *file);
int security_file_post_open(struct file *file, int mask);
int security_file_truncate(struct file *file);
-int security_task_alloc(struct task_struct *task, unsigned long clone_flags);
+int security_task_alloc(struct task_struct *task, u64 clone_flags);
void security_task_free(struct task_struct *task);
int security_cred_alloc_blank(struct cred *cred, gfp_t gfp);
void security_cred_free(struct cred *cred);
@@ -1215,7 +1215,7 @@ static inline int security_file_truncate(struct file *file)
}

static inline int security_task_alloc(struct task_struct *task,
- unsigned long clone_flags)
+ u64 clone_flags)
{
return 0;
}
diff --git a/include/linux/sem.h b/include/linux/sem.h
index c4deefe42aeb..275269ce2ec8 100644
--- a/include/linux/sem.h
+++ b/include/linux/sem.h
@@ -9,12 +9,12 @@ struct task_struct;

#ifdef CONFIG_SYSVIPC

-extern int copy_semundo(unsigned long clone_flags, struct task_struct *tsk);
+extern int copy_semundo(u64 clone_flags, struct task_struct *tsk);
extern void exit_sem(struct task_struct *tsk);

#else

-static inline int copy_semundo(unsigned long clone_flags, struct task_struct *tsk)
+static inline int copy_semundo(u64 clone_flags, struct task_struct *tsk)
{
return 0;
}
diff --git a/include/linux/time_namespace.h b/include/linux/time_namespace.h
index bb2c52f4fc94..b6e36525e0be 100644
--- a/include/linux/time_namespace.h
+++ b/include/linux/time_namespace.h
@@ -43,7 +43,7 @@ static inline struct time_namespace *get_time_ns(struct time_namespace *ns)
return ns;
}

-struct time_namespace *copy_time_ns(unsigned long flags,
+struct time_namespace *copy_time_ns(u64 flags,
struct user_namespace *user_ns,
struct time_namespace *old_ns);
void free_time_ns(struct time_namespace *ns);
@@ -129,7 +129,7 @@ static inline void put_time_ns(struct time_namespace *ns)
}

static inline
-struct time_namespace *copy_time_ns(unsigned long flags,
+struct time_namespace *copy_time_ns(u64 flags,
struct user_namespace *user_ns,
struct time_namespace *old_ns)
{
diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
index 516217c39094..915303a82d84 100644
--- a/include/linux/uprobes.h
+++ b/include/linux/uprobes.h
@@ -205,7 +205,7 @@ extern void uprobe_start_dup_mmap(void);
extern void uprobe_end_dup_mmap(void);
extern void uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm);
extern void uprobe_free_utask(struct task_struct *t);
-extern void uprobe_copy_process(struct task_struct *t, unsigned long flags);
+extern void uprobe_copy_process(struct task_struct *t, u64 flags);
extern int uprobe_post_sstep_notifier(struct pt_regs *regs);
extern int uprobe_pre_sstep_notifier(struct pt_regs *regs);
extern void uprobe_notify_resume(struct pt_regs *regs);
@@ -281,7 +281,7 @@ static inline bool uprobe_deny_signal(void)
static inline void uprobe_free_utask(struct task_struct *t)
{
}
-static inline void uprobe_copy_process(struct task_struct *t, unsigned long flags)
+static inline void uprobe_copy_process(struct task_struct *t, u64 flags)
{
}
static inline void uprobe_clear_state(struct mm_struct *mm)
diff --git a/include/linux/user_events.h b/include/linux/user_events.h
index 8afa8c3a0973..57d1ff006090 100644
--- a/include/linux/user_events.h
+++ b/include/linux/user_events.h
@@ -33,7 +33,7 @@ extern void user_event_mm_dup(struct task_struct *t,
extern void user_event_mm_remove(struct task_struct *t);

static inline void user_events_fork(struct task_struct *t,
- unsigned long clone_flags)
+ u64 clone_flags)
{
struct user_event_mm *old_mm;

@@ -68,7 +68,7 @@ static inline void user_events_exit(struct task_struct *t)
}
#else
static inline void user_events_fork(struct task_struct *t,
- unsigned long clone_flags)
+ u64 clone_flags)
{
}

diff --git a/include/linux/utsname.h b/include/linux/utsname.h
index bf7613ba412b..ba34ec0e2f95 100644
--- a/include/linux/utsname.h
+++ b/include/linux/utsname.h
@@ -35,7 +35,7 @@ static inline void get_uts_ns(struct uts_namespace *ns)
refcount_inc(&ns->ns.count);
}

-extern struct uts_namespace *copy_utsname(unsigned long flags,
+extern struct uts_namespace *copy_utsname(u64 flags,
struct user_namespace *user_ns, struct uts_namespace *old_ns);
extern void free_uts_ns(struct uts_namespace *ns);

@@ -55,7 +55,7 @@ static inline void put_uts_ns(struct uts_namespace *ns)
{
}

-static inline struct uts_namespace *copy_utsname(unsigned long flags,
+static inline struct uts_namespace *copy_utsname(u64 flags,
struct user_namespace *user_ns, struct uts_namespace *old_ns)
{
if (flags & CLONE_NEWUTS)
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 025a7574b275..0e008cfe159d 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -204,7 +204,7 @@ struct net {
extern struct net init_net;

#ifdef CONFIG_NET_NS
-struct net *copy_net_ns(unsigned long flags, struct user_namespace *user_ns,
+struct net *copy_net_ns(u64 flags, struct user_namespace *user_ns,
struct net *old_net);

void net_ns_get_ownership(const struct net *net, kuid_t *uid, kgid_t *gid);
@@ -218,7 +218,7 @@ extern struct task_struct *cleanup_net_task;
#else /* CONFIG_NET_NS */
#include <linux/sched.h>
#include <linux/nsproxy.h>
-static inline struct net *copy_net_ns(unsigned long flags,
+static inline struct net *copy_net_ns(u64 flags,
struct user_namespace *user_ns, struct net *old_net)
{
if (flags & CLONE_NEWNET)
diff --git a/include/trace/events/task.h b/include/trace/events/task.h
index af535b053033..4f0759634306 100644
--- a/include/trace/events/task.h
+++ b/include/trace/events/task.h
@@ -8,14 +8,14 @@

TRACE_EVENT(task_newtask,

- TP_PROTO(struct task_struct *task, unsigned long clone_flags),
+ TP_PROTO(struct task_struct *task, u64 clone_flags),

TP_ARGS(task, clone_flags),

TP_STRUCT__entry(
__field( pid_t, pid)
__array( char, comm, TASK_COMM_LEN)
- __field( unsigned long, clone_flags)
+ __field( u64, clone_flags)
__field( short, oom_score_adj)
),

@@ -26,7 +26,7 @@ TRACE_EVENT(task_newtask,
__entry->oom_score_adj = task->signal->oom_score_adj;
),

- TP_printk("pid=%d comm=%s clone_flags=%lx oom_score_adj=%hd",
+ TP_printk("pid=%d comm=%s clone_flags=%llx oom_score_adj=%hd",
__entry->pid, __entry->comm,
__entry->clone_flags, __entry->oom_score_adj)
);
diff --git a/ipc/namespace.c b/ipc/namespace.c
index 4df91ceeeafe..a712ec27209c 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -106,7 +106,7 @@ static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns,
return ERR_PTR(err);
}

-struct ipc_namespace *copy_ipcs(unsigned long flags,
+struct ipc_namespace *copy_ipcs(u64 flags,
struct user_namespace *user_ns, struct ipc_namespace *ns)
{
if (!(flags & CLONE_NEWIPC))
diff --git a/ipc/sem.c b/ipc/sem.c
index a39cdc7bf88f..0f06e4bd4673 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -2303,7 +2303,7 @@ SYSCALL_DEFINE3(semop, int, semid, struct sembuf __user *, tsops,
* parent and child tasks.
*/

-int copy_semundo(unsigned long clone_flags, struct task_struct *tsk)
+int copy_semundo(u64 clone_flags, struct task_struct *tsk)
{
struct sem_undo_list *undo_list;
int error;
diff --git a/kernel/cgroup/namespace.c b/kernel/cgroup/namespace.c
index 144a464e45c6..dedadb525880 100644
--- a/kernel/cgroup/namespace.c
+++ b/kernel/cgroup/namespace.c
@@ -47,7 +47,7 @@ void free_cgroup_ns(struct cgroup_namespace *ns)
}
EXPORT_SYMBOL(free_cgroup_ns);

-struct cgroup_namespace *copy_cgroup_ns(unsigned long flags,
+struct cgroup_namespace *copy_cgroup_ns(u64 flags,
struct user_namespace *user_ns,
struct cgroup_namespace *old_ns)
{
diff --git a/kernel/cred.c b/kernel/cred.c
index 9676965c0981..dbf6b687dc5c 100644
--- a/kernel/cred.c
+++ b/kernel/cred.c
@@ -287,7 +287,7 @@ struct cred *prepare_exec_creds(void)
* The new process gets the current process's subjective credentials as its
* objective and subjective credentials
*/
-int copy_creds(struct task_struct *p, unsigned long clone_flags)
+int copy_creds(struct task_struct *p, u64 clone_flags)
{
struct cred *new;
int ret;
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 31a12b60055f..aa479d24ccaf 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -2160,7 +2160,7 @@ static void dup_xol_work(struct callback_head *work)
/*
* Called in context of a new clone/fork from copy_process.
*/
-void uprobe_copy_process(struct task_struct *t, unsigned long flags)
+void uprobe_copy_process(struct task_struct *t, u64 flags)
{
struct uprobe_task *utask = current->utask;
struct mm_struct *mm = current->mm;
diff --git a/kernel/fork.c b/kernel/fork.c
index 82f5d52fecf1..0e9b2dd6c365 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1510,7 +1510,7 @@ static struct mm_struct *dup_mm(struct task_struct *tsk,
return NULL;
}

-static int copy_mm(unsigned long clone_flags, struct task_struct *tsk)
+static int copy_mm(u64 clone_flags, struct task_struct *tsk)
{
struct mm_struct *mm, *oldmm;

@@ -1548,7 +1548,7 @@ static int copy_mm(unsigned long clone_flags, struct task_struct *tsk)
return 0;
}

-static int copy_fs(unsigned long clone_flags, struct task_struct *tsk)
+static int copy_fs(u64 clone_flags, struct task_struct *tsk)
{
struct fs_struct *fs = current->fs;
if (clone_flags & CLONE_FS) {
@@ -1569,7 +1569,7 @@ static int copy_fs(unsigned long clone_flags, struct task_struct *tsk)
return 0;
}

-static int copy_files(unsigned long clone_flags, struct task_struct *tsk,
+static int copy_files(u64 clone_flags, struct task_struct *tsk,
int no_files)
{
struct files_struct *oldf, *newf;
@@ -1648,7 +1648,7 @@ static void posix_cpu_timers_init_group(struct signal_struct *sig)
posix_cputimers_group_init(pct, cpu_limit);
}

-static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
+static int copy_signal(u64 clone_flags, struct task_struct *tsk)
{
struct signal_struct *sig;

diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index 5f31fdff8a38..8af3b9ec3aa8 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -64,7 +64,7 @@ static inline struct nsproxy *create_nsproxy(void)
* Return the newly created nsproxy. Do not attach this to the task,
* leave it to the caller to do proper locking and attach it to task.
*/
-static struct nsproxy *create_new_namespaces(unsigned long flags,
+static struct nsproxy *create_new_namespaces(u64 flags,
struct task_struct *tsk, struct user_namespace *user_ns,
struct fs_struct *new_fs)
{
@@ -144,7 +144,7 @@ static struct nsproxy *create_new_namespaces(unsigned long flags,
* called from clone. This now handles copy for nsproxy and all
* namespaces therein.
*/
-int copy_namespaces(unsigned long flags, struct task_struct *tsk)
+int copy_namespaces(u64 flags, struct task_struct *tsk)
{
struct nsproxy *old_ns = tsk->nsproxy;
struct user_namespace *user_ns = task_cred_xxx(tsk, user_ns);
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 7098ed44e717..06bc7c7f78e0 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -171,7 +171,7 @@ static void destroy_pid_namespace_work(struct work_struct *work)
} while (ns != &init_pid_ns && refcount_dec_and_test(&ns->ns.count));
}

-struct pid_namespace *copy_pid_ns(unsigned long flags,
+struct pid_namespace *copy_pid_ns(u64 flags,
struct user_namespace *user_ns, struct pid_namespace *old_ns)
{
if (!(flags & CLONE_NEWPID))
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index be00629f0ba4..6fa85d30d965 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4472,7 +4472,7 @@ int wake_up_state(struct task_struct *p, unsigned int state)
* __sched_fork() is basic setup which is also used by sched_init() to
* initialize the boot CPU's idle task.
*/
-static void __sched_fork(unsigned long clone_flags, struct task_struct *p)
+static void __sched_fork(u64 clone_flags, struct task_struct *p)
{
p->on_rq = 0;

@@ -4707,7 +4707,7 @@ late_initcall(sched_core_sysctl_init);
/*
* fork()/clone()-time setup:
*/
-int sched_fork(unsigned long clone_flags, struct task_struct *p)
+int sched_fork(u64 clone_flags, struct task_struct *p)
{
__sched_fork(clone_flags, p);
/*
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index e256793b9a08..06bcba61ca75 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3542,7 +3542,7 @@ static void task_numa_work(struct callback_head *work)
}
}

-void init_numa_balancing(unsigned long clone_flags, struct task_struct *p)
+void init_numa_balancing(u64 clone_flags, struct task_struct *p)
{
int mm_users = 0;
struct mm_struct *mm = p->mm;
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index be9745d104f7..f9adfc912ddc 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1935,12 +1935,12 @@ extern void sched_setnuma(struct task_struct *p, int node);
extern int migrate_task_to(struct task_struct *p, int cpu);
extern int migrate_swap(struct task_struct *p, struct task_struct *t,
int cpu, int scpu);
-extern void init_numa_balancing(unsigned long clone_flags, struct task_struct *p);
+extern void init_numa_balancing(u64 clone_flags, struct task_struct *p);

#else /* !CONFIG_NUMA_BALANCING: */

static inline void
-init_numa_balancing(unsigned long clone_flags, struct task_struct *p)
+init_numa_balancing(u64 clone_flags, struct task_struct *p)
{
}

diff --git a/kernel/time/namespace.c b/kernel/time/namespace.c
index 667452768ed3..888872bcc5bb 100644
--- a/kernel/time/namespace.c
+++ b/kernel/time/namespace.c
@@ -130,7 +130,7 @@ static struct time_namespace *clone_time_ns(struct user_namespace *user_ns,
*
* Return: timens_for_children namespace or ERR_PTR.
*/
-struct time_namespace *copy_time_ns(unsigned long flags,
+struct time_namespace *copy_time_ns(u64 flags,
struct user_namespace *user_ns, struct time_namespace *old_ns)
{
if (!(flags & CLONE_NEWTIME))
diff --git a/kernel/utsname.c b/kernel/utsname.c
index b1ac3ca870f2..00d8d7922f86 100644
--- a/kernel/utsname.c
+++ b/kernel/utsname.c
@@ -86,7 +86,7 @@ static struct uts_namespace *clone_uts_ns(struct user_namespace *user_ns,
* utsname of this process won't be seen by parent, and vice
* versa.
*/
-struct uts_namespace *copy_utsname(unsigned long flags,
+struct uts_namespace *copy_utsname(u64 flags,
struct user_namespace *user_ns, struct uts_namespace *old_ns)
{
struct uts_namespace *new_ns;
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 1b6f3826dd0e..8ec9d83475bf 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -539,7 +539,7 @@ void net_drop_ns(void *p)
net_passive_dec(net);
}

-struct net *copy_net_ns(unsigned long flags,
+struct net *copy_net_ns(u64 flags,
struct user_namespace *user_ns, struct net *old_net)
{
struct ucounts *ucounts;
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
index 8e1cc229b41b..ba39cfe0cd08 100644
--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
@@ -112,7 +112,7 @@ static void apparmor_task_free(struct task_struct *task)
}

static int apparmor_task_alloc(struct task_struct *task,
- unsigned long clone_flags)
+ u64 clone_flags)
{
struct aa_task_ctx *new = task_ctx(task);

diff --git a/security/security.c b/security/security.c
index ca126b02d2fe..d5fea03a741a 100644
--- a/security/security.c
+++ b/security/security.c
@@ -3224,7 +3224,7 @@ int security_file_truncate(struct file *file)
*
* Return: Returns a zero on success, negative values on failure.
*/
-int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
+int security_task_alloc(struct task_struct *task, u64 clone_flags)
{
int rc = lsm_task_alloc(task);

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index f94642ca34f2..9d3b5ebd7657 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -4144,7 +4144,7 @@ static int selinux_file_open(struct file *file)
/* task security operations */

static int selinux_task_alloc(struct task_struct *task,
- unsigned long clone_flags)
+ u64 clone_flags)
{
u32 sid = current_sid();

diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c
index d6ebcd9db80a..48fc59d38ab2 100644
--- a/security/tomoyo/tomoyo.c
+++ b/security/tomoyo/tomoyo.c
@@ -514,7 +514,7 @@ struct lsm_blob_sizes tomoyo_blob_sizes __ro_after_init = {
* Returns 0.
*/
static int tomoyo_task_alloc(struct task_struct *task,
- unsigned long clone_flags)
+ u64 clone_flags)
{
struct tomoyo_task *old = tomoyo_task(current);
struct tomoyo_task *new = tomoyo_task(task);

--
2.39.5