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| author |   Al Viro <viro@zeniv.linux.org.uk> | 2012-09-21 19:55:31 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-09-30 13:35:55 -0400 |
| commit | 2aa3a7f8660355c3dddead17e224545c1a3d5a5f (patch) | |
| tree | d106fcaeb6b66e09591cf8ec28c836be93f4d837 /kernel | |
| parent | um: kill thread->forking (diff) | |
| download | linux-dev-2aa3a7f8660355c3dddead17e224545c1a3d5a5f.tar.xz linux-dev-2aa3a7f8660355c3dddead17e224545c1a3d5a5f.zip | |
preparation for generic kernel_thread()
Let architectures select GENERIC_KERNEL_THREAD and have their copy_thread()
treat NULL regs as "it came from kernel_thread(), sp argument contains
the function new thread will be calling and stack_size - the argument for
that function". Switching the architectures begins shortly...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/fork.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 2c8857e12855..a42c62a8eb24 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1609,7 +1609,7 @@ long do_fork(unsigned long clone_flags, * requested, no event is reported; otherwise, report if the event * for the type of forking is enabled. */ - if (likely(user_mode(regs)) && !(clone_flags & CLONE_UNTRACED)) { + if (!(clone_flags & CLONE_UNTRACED) && likely(user_mode(regs))) { if (clone_flags & CLONE_VFORK) trace = PTRACE_EVENT_VFORK; else if ((clone_flags & CSIGNAL) != SIGCHLD) @@ -1659,6 +1659,17 @@ long do_fork(unsigned long clone_flags, return nr; } +#ifdef CONFIG_GENERIC_KERNEL_THREAD +/* + * Create a kernel thread. + */ +pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) +{ + return do_fork(flags|CLONE_VM|CLONE_UNTRACED, (unsigned long)fn, NULL, + (unsigned long)arg, NULL, NULL); +} +#endif + #ifndef ARCH_MIN_MMSTRUCT_ALIGN #define ARCH_MIN_MMSTRUCT_ALIGN 0 #endif |