diff options
Diffstat (limited to 'arch/tile/kernel/process.c')
| -rw-r--r-- | arch/tile/kernel/process.c | 52 |
1 files changed, 50 insertions, 2 deletions
diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c index d0065103eb7..9c45d8bbdf5 100644 --- a/arch/tile/kernel/process.c +++ b/arch/tile/kernel/process.c @@ -25,10 +25,13 @@ #include <linux/hardirq.h> #include <linux/syscalls.h> #include <linux/kernel.h> +#include <linux/tracehook.h> +#include <linux/signal.h> #include <asm/system.h> #include <asm/stack.h> #include <asm/homecache.h> #include <asm/syscalls.h> +#include <asm/traps.h> #ifdef CONFIG_HARDWALL #include <asm/hardwall.h> #endif @@ -546,6 +549,51 @@ struct task_struct *__sched _switch_to(struct task_struct *prev, return __switch_to(prev, next, next_current_ksp0(next)); } +/* + * This routine is called on return from interrupt if any of the + * TIF_WORK_MASK flags are set in thread_info->flags. It is + * entered with interrupts disabled so we don't miss an event + * that modified the thread_info flags. If any flag is set, we + * handle it and return, and the calling assembly code will + * re-disable interrupts, reload the thread flags, and call back + * if more flags need to be handled. + * + * We return whether we need to check the thread_info flags again + * or not. Note that we don't clear TIF_SINGLESTEP here, so it's + * important that it be tested last, and then claim that we don't + * need to recheck the flags. + */ +int do_work_pending(struct pt_regs *regs, u32 thread_info_flags) +{ + if (thread_info_flags & _TIF_NEED_RESCHED) { + schedule(); + return 1; + } +#if CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC() + if (thread_info_flags & _TIF_ASYNC_TLB) { + do_async_page_fault(regs); + return 1; + } +#endif + if (thread_info_flags & _TIF_SIGPENDING) { + do_signal(regs); + return 1; + } + if (thread_info_flags & _TIF_NOTIFY_RESUME) { + clear_thread_flag(TIF_NOTIFY_RESUME); + tracehook_notify_resume(regs); + if (current->replacement_session_keyring) + key_replace_session_keyring(); + return 1; + } + if (thread_info_flags & _TIF_SINGLESTEP) { + if ((regs->ex1 & SPR_EX_CONTEXT_1_1__PL_MASK) == 0) + single_step_once(regs); + return 0; + } + panic("work_pending: bad flags %#x\n", thread_info_flags); +} + /* Note there is an implicit fifth argument if (clone_flags & CLONE_SETTLS). */ SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp, void __user *, parent_tidptr, void __user *, child_tidptr, @@ -582,8 +630,8 @@ out: #ifdef CONFIG_COMPAT long compat_sys_execve(const char __user *path, - const compat_uptr_t __user *argv, - const compat_uptr_t __user *envp, + compat_uptr_t __user *argv, + compat_uptr_t __user *envp, struct pt_regs *regs) { long error; |