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kernel-clone-v5.9

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Merge tag 'kernel-clone-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux

Pull kernel_clone() updates from Christian Brauner:
 "During the v5.9 merge window we reworked the process creation
  codepaths across multiple architectures. After this work we were only
  left with the _do_fork() helper based on the struct kernel_clone_args
  calling convention. As was pointed out _do_fork() isn't valid
  kernelese especially for a helper that isn't just static.

  This series removes the _do_fork() helper and introduces the new
  kernel_clone() helper. The process creation cleanup didn't change the
  name to something more reasonable mainly because _do_fork() was used
  in quite a few places. So sending this as a separate series seemed the
  better strategy.

  I originally intended to send this early in the v5.9 development cycle
  after the merge window had closed but given that this was touching
  quite a few places I decided to defer this until the v5.10 merge
  window"

* tag 'kernel-clone-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  sched: remove _do_fork()
  tracing: switch to kernel_clone()
  kgdbts: switch to kernel_clone()
  kprobes: switch to kernel_clone()
  x86: switch to kernel_clone()
  sparc: switch to kernel_clone()
  nios2: switch to kernel_clone()
  m68k: switch to kernel_clone()
  ia64: switch to kernel_clone()
  h8300: switch to kernel_clone()
  fork: introduce kernel_clone()
This commit is contained in:
Linus Torvalds 2020-10-14 14:32:52 -07:00
commit 612e7a4c16
28 changed files with 88 additions and 88 deletions
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16
kernel/fork.c
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@ -2412,14 +2412,14 @@ struct mm_struct *copy_init_mm(void)
*
* args->exit_signal is expected to be checked for sanity by the caller.
*/
long _do_fork(struct kernel_clone_args *args)
pid_t kernel_clone(struct kernel_clone_args *args)
{
u64 clone_flags = args->flags;
struct completion vfork;
struct pid *pid;
struct task_struct *p;
int trace = 0;
long nr;
pid_t nr;
/*
* For legacy clone() calls, CLONE_PIDFD uses the parent_tid argument
@ -2505,7 +2505,7 @@ pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
.stack_size = (unsigned long)arg,
};
return _do_fork(&args);
return kernel_clone(&args);
}
#ifdef __ARCH_WANT_SYS_FORK
@ -2516,7 +2516,7 @@ SYSCALL_DEFINE0(fork)
.exit_signal = SIGCHLD,
};
return _do_fork(&args);
return kernel_clone(&args);
#else
/* can not support in nommu mode */
return -EINVAL;
@ -2532,7 +2532,7 @@ SYSCALL_DEFINE0(vfork)
.exit_signal = SIGCHLD,
};
return _do_fork(&args);
return kernel_clone(&args);
}
#endif
@ -2570,7 +2570,7 @@ SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp,
.tls = tls,
};
return _do_fork(&args);
return kernel_clone(&args);
}
#endif
@ -2728,7 +2728,7 @@ SYSCALL_DEFINE2(clone3, struct clone_args __user *, uargs, size_t, size)
if (!clone3_args_valid(&kargs))
return -EINVAL;
return _do_fork(&kargs);
return kernel_clone(&kargs);
}
#endif
@ -2891,7 +2891,7 @@ int unshare_fd(unsigned long unshare_flags, unsigned int max_fds,
/*
* unshare allows a process to 'unshare' part of the process
* context which was originally shared using clone. copy_*
* functions used by _do_fork() cannot be used here directly
* functions used by kernel_clone() cannot be used here directly
* because they modify an inactive task_struct that is being
* constructed. Here we are modifying the current, active,
* task_struct.