diff options
Diffstat (limited to 'arch/alpha/include/asm')
| -rw-r--r-- | arch/alpha/include/asm/thread_info.h | 80 |
1 files changed, 54 insertions, 26 deletions
diff --git a/arch/alpha/include/asm/thread_info.h b/arch/alpha/include/asm/thread_info.h index 4554ecbff7c..1f8c72959fb 100644 --- a/arch/alpha/include/asm/thread_info.h +++ b/arch/alpha/include/asm/thread_info.h @@ -7,6 +7,7 @@ #include <asm/processor.h> #include <asm/types.h> #include <asm/hwrpb.h> +#include <asm/sysinfo.h> #endif #ifndef __ASSEMBLY__ @@ -21,6 +22,7 @@ struct thread_info { mm_segment_t addr_limit; /* thread address space */ unsigned cpu; /* current CPU */ int preempt_count; /* 0 => preemptable, <0 => BUG */ + unsigned int status; /* thread-synchronous flags */ int bpt_nsaved; unsigned long bpt_addr[2]; /* breakpoint handling */ @@ -63,8 +65,6 @@ register struct thread_info *__current_thread_info __asm__("$8"); * - these are process state flags and used from assembly * - pending work-to-be-done flags come first and must be assigned to be * within bits 0 to 7 to fit in and immediate operand. - * - ALPHA_UAC_SHIFT below must be kept consistent with the unaligned - * control flags. * * TIF_SYSCALL_TRACE is known to be 0 via blbs. */ @@ -72,18 +72,12 @@ register struct thread_info *__current_thread_info __asm__("$8"); #define TIF_NOTIFY_RESUME 1 /* callback before returning to user */ #define TIF_SIGPENDING 2 /* signal pending */ #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ -#define TIF_POLLING_NRFLAG 8 /* poll_idle is polling NEED_RESCHED */ #define TIF_DIE_IF_KERNEL 9 /* dik recursion lock */ -#define TIF_UAC_NOPRINT 10 /* ! Preserve sequence of following */ -#define TIF_UAC_NOFIX 11 /* ! flags as they match */ -#define TIF_UAC_SIGBUS 12 /* ! userspace part of 'osf_sysinfo' */ #define TIF_MEMDIE 13 /* is terminating due to OOM killer */ -#define TIF_RESTORE_SIGMASK 14 /* restore signal mask in do_signal */ #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) -#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) /* Work to do on interrupt/exception return. */ @@ -94,29 +88,63 @@ register struct thread_info *__current_thread_info __asm__("$8"); #define _TIF_ALLWORK_MASK (_TIF_WORK_MASK \ | _TIF_SYSCALL_TRACE) -#define ALPHA_UAC_SHIFT TIF_UAC_NOPRINT -#define ALPHA_UAC_MASK (1 << TIF_UAC_NOPRINT | 1 << TIF_UAC_NOFIX | \ - 1 << TIF_UAC_SIGBUS) +#define TS_UAC_NOPRINT 0x0001 /* ! Preserve the following three */ +#define TS_UAC_NOFIX 0x0002 /* ! flags as they match */ +#define TS_UAC_SIGBUS 0x0004 /* ! userspace part of 'osf_sysinfo' */ +#define TS_RESTORE_SIGMASK 0x0008 /* restore signal mask in do_signal() */ +#define TS_POLLING 0x0010 /* idle task polling need_resched, + skip sending interrupt */ -#define SET_UNALIGN_CTL(task,value) ({ \ - task_thread_info(task)->flags = ((task_thread_info(task)->flags & \ - ~ALPHA_UAC_MASK) \ - | (((value) << ALPHA_UAC_SHIFT) & (1<<TIF_UAC_NOPRINT))\ - | (((value) << (ALPHA_UAC_SHIFT + 1)) & (1<<TIF_UAC_SIGBUS)) \ - | (((value) << (ALPHA_UAC_SHIFT - 1)) & (1<<TIF_UAC_NOFIX)));\ +#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING) + +#ifndef __ASSEMBLY__ +#define HAVE_SET_RESTORE_SIGMASK 1 +static inline void set_restore_sigmask(void) +{ + struct thread_info *ti = current_thread_info(); + ti->status |= TS_RESTORE_SIGMASK; + WARN_ON(!test_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags)); +} +static inline void clear_restore_sigmask(void) +{ + current_thread_info()->status &= ~TS_RESTORE_SIGMASK; +} +static inline bool test_restore_sigmask(void) +{ + return current_thread_info()->status & TS_RESTORE_SIGMASK; +} +static inline bool test_and_clear_restore_sigmask(void) +{ + struct thread_info *ti = current_thread_info(); + if (!(ti->status & TS_RESTORE_SIGMASK)) + return false; + ti->status &= ~TS_RESTORE_SIGMASK; + return true; +} +#endif + +#define SET_UNALIGN_CTL(task,value) ({ \ + __u32 status = task_thread_info(task)->status & ~UAC_BITMASK; \ + if (value & PR_UNALIGN_NOPRINT) \ + status |= TS_UAC_NOPRINT; \ + if (value & PR_UNALIGN_SIGBUS) \ + status |= TS_UAC_SIGBUS; \ + if (value & 4) /* alpha-specific */ \ + status |= TS_UAC_NOFIX; \ + task_thread_info(task)->status = status; \ 0; }) #define GET_UNALIGN_CTL(task,value) ({ \ - put_user((task_thread_info(task)->flags & (1 << TIF_UAC_NOPRINT))\ - >> ALPHA_UAC_SHIFT \ - | (task_thread_info(task)->flags & (1 << TIF_UAC_SIGBUS))\ - >> (ALPHA_UAC_SHIFT + 1) \ - | (task_thread_info(task)->flags & (1 << TIF_UAC_NOFIX))\ - >> (ALPHA_UAC_SHIFT - 1), \ - (int __user *)(value)); \ + __u32 status = task_thread_info(task)->status & ~UAC_BITMASK; \ + __u32 res = 0; \ + if (status & TS_UAC_NOPRINT) \ + res |= PR_UNALIGN_NOPRINT; \ + if (status & TS_UAC_SIGBUS) \ + res |= PR_UNALIGN_SIGBUS; \ + if (status & TS_UAC_NOFIX) \ + res |= 4; \ + put_user(res, (int __user *)(value)); \ }) -#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG) - #endif /* __KERNEL__ */ #endif /* _ALPHA_THREAD_INFO_H */ |