diff options
Diffstat (limited to 'arch/blackfin/kernel/process.c')
| -rw-r--r-- | arch/blackfin/kernel/process.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c index e040e03335e..3e1d86e456f 100644 --- a/arch/blackfin/kernel/process.c +++ b/arch/blackfin/kernel/process.c @@ -160,6 +160,29 @@ pid_t kernel_thread(int (*fn) (void *), void *arg, unsigned long flags) } EXPORT_SYMBOL(kernel_thread); +/* + * Do necessary setup to start up a newly executed thread. + * + * pass the data segment into user programs if it exists, + * it can't hurt anything as far as I can tell + */ +void start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp) +{ + set_fs(USER_DS); + regs->pc = new_ip; + if (current->mm) + regs->p5 = current->mm->start_data; +#ifdef CONFIG_SMP + task_thread_info(current)->l1_task_info.stack_start = + (void *)current->mm->context.stack_start; + task_thread_info(current)->l1_task_info.lowest_sp = (void *)new_sp; + memcpy(L1_SCRATCH_TASK_INFO, &task_thread_info(current)->l1_task_info, + sizeof(*L1_SCRATCH_TASK_INFO)); +#endif + wrusp(new_sp); +} +EXPORT_SYMBOL_GPL(start_thread); + void flush_thread(void) { } @@ -322,6 +345,9 @@ void finish_atomic_sections (struct pt_regs *regs) } #if defined(CONFIG_ACCESS_CHECK) +#ifdef CONFIG_ACCESS_OK_L1 +__attribute__((l1_text)) +#endif /* Return 1 if access to memory range is OK, 0 otherwise */ int _access_ok(unsigned long addr, unsigned long size) { |