diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2022-04-12 18:18:48 +0300 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2022-05-07 17:01:59 +0300 |
| commit | 5bd2e97c868a8a44470950ed01846cab6328e540 (patch) | |
| tree | 7919866d9e44b6c98bfe16f6ac436013ce9e75c0 /arch/x86/include | |
| parent | 36cb0e1cda645ee645b85a6ce652cb46a16e14e5 (diff) | |
| download | linux-5bd2e97c868a8a44470950ed01846cab6328e540.tar.xz | |
fork: Generalize PF_IO_WORKER handling
Add fn and fn_arg members into struct kernel_clone_args and test for
them in copy_thread (instead of testing for PF_KTHREAD | PF_IO_WORKER).
This allows any task that wants to be a user space task that only runs
in kernel mode to use this functionality.
The code on x86 is an exception and still retains a PF_KTHREAD test
because x86 unlikely everything else handles kthreads slightly
differently than user space tasks that start with a function.
The functions that created tasks that start with a function
have been updated to set ".fn" and ".fn_arg" instead of
".stack" and ".stack_size". These functions are fork_idle(),
create_io_thread(), kernel_thread(), and user_mode_thread().
Link: https://lkml.kernel.org/r/20220506141512.516114-4-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/fpu/sched.h | 2 | ||||
| -rw-r--r-- | arch/x86/include/asm/switch_to.h | 8 |
2 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86/include/asm/fpu/sched.h b/arch/x86/include/asm/fpu/sched.h index 99a8820e8cc4..b2486b2cbc6e 100644 --- a/arch/x86/include/asm/fpu/sched.h +++ b/arch/x86/include/asm/fpu/sched.h @@ -11,7 +11,7 @@ extern void save_fpregs_to_fpstate(struct fpu *fpu); extern void fpu__drop(struct fpu *fpu); -extern int fpu_clone(struct task_struct *dst, unsigned long clone_flags); +extern int fpu_clone(struct task_struct *dst, unsigned long clone_flags, bool minimal); extern void fpu_flush_thread(void); /* diff --git a/arch/x86/include/asm/switch_to.h b/arch/x86/include/asm/switch_to.h index b5f0d2ff47e4..c08eb0fdd11f 100644 --- a/arch/x86/include/asm/switch_to.h +++ b/arch/x86/include/asm/switch_to.h @@ -78,13 +78,13 @@ static inline void update_task_stack(struct task_struct *task) } static inline void kthread_frame_init(struct inactive_task_frame *frame, - unsigned long fun, unsigned long arg) + int (*fun)(void *), void *arg) { - frame->bx = fun; + frame->bx = (unsigned long)fun; #ifdef CONFIG_X86_32 - frame->di = arg; + frame->di = (unsigned long)arg; #else - frame->r12 = arg; + frame->r12 = (unsigned long)arg; #endif } |