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-rw-r--r--include/asm-m68k/atomic.h12
-rw-r--r--include/asm-m68k/processor.h14
-rw-r--r--include/asm-m68k/thread_info.h91
3 files changed, 31 insertions, 86 deletions
diff --git a/include/asm-m68k/atomic.h b/include/asm-m68k/atomic.h
index 38f3043..e3c962e 100644
--- a/include/asm-m68k/atomic.h
+++ b/include/asm-m68k/atomic.h
@@ -139,6 +139,18 @@ static inline void atomic_set_mask(unsigned long mask, unsigned long *v)
__asm__ __volatile__("orl %1,%0" : "+m" (*v) : "id" (mask));
}
+#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
+
+#define atomic_add_unless(v, a, u) \
+({ \
+ int c, old; \
+ c = atomic_read(v); \
+ while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \
+ c = old; \
+ c != (u); \
+})
+#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
+
/* Atomic operations are already serializing */
#define smp_mb__before_atomic_dec() barrier()
#define smp_mb__after_atomic_dec() barrier()
diff --git a/include/asm-m68k/processor.h b/include/asm-m68k/processor.h
index df1575d..7982285 100644
--- a/include/asm-m68k/processor.h
+++ b/include/asm-m68k/processor.h
@@ -14,6 +14,7 @@
#define current_text_addr() ({ __label__ _l; _l: &&_l;})
#include <linux/config.h>
+#include <linux/thread_info.h>
#include <asm/segment.h>
#include <asm/fpu.h>
#include <asm/ptrace.h>
@@ -55,17 +56,6 @@ static inline void wrusp(unsigned long usp)
#endif
#define TASK_UNMAPPED_ALIGN(addr, off) PAGE_ALIGN(addr)
-struct task_work {
- unsigned char sigpending;
- unsigned char notify_resume; /* request for notification on
- userspace execution resumption */
- char need_resched;
- unsigned char delayed_trace; /* single step a syscall */
- unsigned char syscall_trace; /* count of syscall interceptors */
- unsigned char memdie; /* task was selected to be killed */
- unsigned char pad[2];
-};
-
struct thread_struct {
unsigned long ksp; /* kernel stack pointer */
unsigned long usp; /* user stack pointer */
@@ -78,7 +68,7 @@ struct thread_struct {
unsigned long fp[8*3];
unsigned long fpcntl[3]; /* fp control regs */
unsigned char fpstate[FPSTATESIZE]; /* floating point state */
- struct task_work work;
+ struct thread_info info;
};
#define INIT_THREAD { \
diff --git a/include/asm-m68k/thread_info.h b/include/asm-m68k/thread_info.h
index 2aed24f..9532ca3 100644
--- a/include/asm-m68k/thread_info.h
+++ b/include/asm-m68k/thread_info.h
@@ -2,17 +2,15 @@
#define _ASM_M68K_THREAD_INFO_H
#include <asm/types.h>
-#include <asm/processor.h>
#include <asm/page.h>
struct thread_info {
struct task_struct *task; /* main task structure */
+ unsigned long flags;
struct exec_domain *exec_domain; /* execution domain */
int preempt_count; /* 0 => preemptable, <0 => BUG */
__u32 cpu; /* should always be 0 on m68k */
struct restart_block restart_block;
-
- __u8 supervisor_stack[0];
};
#define PREEMPT_ACTIVE 0x4000000
@@ -35,84 +33,29 @@ struct thread_info {
#define free_thread_info(ti) free_pages((unsigned long)(ti),1)
#endif /* PAGE_SHIFT == 13 */
-//#define init_thread_info (init_task.thread.info)
+#define init_thread_info (init_task.thread.info)
#define init_stack (init_thread_union.stack)
-#define current_thread_info() (current->thread_info)
-
+#define task_thread_info(tsk) (&(tsk)->thread.info)
+#define current_thread_info() task_thread_info(current)
#define __HAVE_THREAD_FUNCTIONS
-#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_DELAYED_TRACE 1 /* single step a syscall */
-#define TIF_NOTIFY_RESUME 2 /* resumption notification requested */
-#define TIF_SIGPENDING 3 /* signal pending */
-#define TIF_NEED_RESCHED 4 /* rescheduling necessary */
-#define TIF_MEMDIE 5
-
-extern int thread_flag_fixme(void);
-
-/*
- * flag set/clear/test wrappers
- * - pass TIF_xxxx constants to these functions
- */
-
-#define __set_tsk_thread_flag(tsk, flag, val) ({ \
- switch (flag) { \
- case TIF_SIGPENDING: \
- tsk->thread.work.sigpending = val; \
- break; \
- case TIF_NEED_RESCHED: \
- tsk->thread.work.need_resched = val; \
- break; \
- case TIF_SYSCALL_TRACE: \
- tsk->thread.work.syscall_trace = val; \
- break; \
- case TIF_MEMDIE: \
- tsk->thread.work.memdie = val; \
- break; \
- default: \
- thread_flag_fixme(); \
- } \
+#define setup_thread_stack(p, org) ({ \
+ *(struct task_struct **)(p)->thread_info = (p); \
+ task_thread_info(p)->task = (p); \
})
-#define __get_tsk_thread_flag(tsk, flag) ({ \
- int ___res; \
- switch (flag) { \
- case TIF_SIGPENDING: \
- ___res = tsk->thread.work.sigpending; \
- break; \
- case TIF_NEED_RESCHED: \
- ___res = tsk->thread.work.need_resched; \
- break; \
- case TIF_SYSCALL_TRACE: \
- ___res = tsk->thread.work.syscall_trace;\
- break; \
- case TIF_MEMDIE: \
- ___res = tsk->thread.work.memdie;\
- break; \
- default: \
- ___res = thread_flag_fixme(); \
- } \
- ___res; \
-})
-
-#define __get_set_tsk_thread_flag(tsk, flag, val) ({ \
- int __res = __get_tsk_thread_flag(tsk, flag); \
- __set_tsk_thread_flag(tsk, flag, val); \
- __res; \
-})
+#define end_of_stack(p) ((unsigned long *)(p)->thread_info + 1)
-#define set_tsk_thread_flag(tsk, flag) __set_tsk_thread_flag(tsk, flag, ~0)
-#define clear_tsk_thread_flag(tsk, flag) __set_tsk_thread_flag(tsk, flag, 0)
-#define test_and_set_tsk_thread_flag(tsk, flag) __get_set_tsk_thread_flag(tsk, flag, ~0)
-#define test_tsk_thread_flag(tsk, flag) __get_tsk_thread_flag(tsk, flag)
-
-#define set_thread_flag(flag) set_tsk_thread_flag(current, flag)
-#define clear_thread_flag(flag) clear_tsk_thread_flag(current, flag)
-#define test_thread_flag(flag) test_tsk_thread_flag(current, flag)
-
-#define set_need_resched() set_thread_flag(TIF_NEED_RESCHED)
-#define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED)
+/* entry.S relies on these definitions!
+ * bits 0-7 are tested at every exception exit
+ * bits 8-15 are also tested at syscall exit
+ */
+#define TIF_SIGPENDING 6 /* signal pending */
+#define TIF_NEED_RESCHED 7 /* rescheduling necessary */
+#define TIF_DELAYED_TRACE 14 /* single step a syscall */
+#define TIF_SYSCALL_TRACE 15 /* syscall trace active */
+#define TIF_MEMDIE 16
#endif /* _ASM_M68K_THREAD_INFO_H */
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