Since the RSE synchronization will need a TIF_ flag, but all
work-to-be-done bits are already used, so we have to multiplex
TIF_NOTIFY_RESUME again.
Signed-off-by: Shaohua Li <shaohua.li@xxxxxxxxx>
Signed-off-by: Petr Tesarik <ptesarik@xxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
---
arch/ia64/kernel/perfmon.c | 21 +++------------------
arch/ia64/kernel/process.c | 9 +++++++++
include/asm-ia64/thread_info.h | 9 ++++++---
3 files changed, 18 insertions(+), 21 deletions(-)
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 73e7c2e..446e452 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -586,21 +586,6 @@ pfm_put_task(struct task_struct *task)
}
static inline void
-pfm_set_task_notify(struct task_struct *task)
-{
- struct thread_info *info;
-
- info = (struct thread_info *) ((char *) task + IA64_TASK_SIZE);
- set_bit(TIF_PERFMON_WORK, &info->flags);
-}
-
-static inline void
-pfm_clear_task_notify(void)
-{
- clear_thread_flag(TIF_PERFMON_WORK);
-}
-
-static inline void
pfm_reserve_page(unsigned long a)
{
SetPageReserved(vmalloc_to_page((void *)a));
@@ -3724,7 +3709,7 @@ pfm_restart(pfm_context_t *ctx, void *ar
PFM_SET_WORK_PENDING(task, 1);
- pfm_set_task_notify(task);
+ tsk_set_notify_resume(task);
/*
* XXX: send reschedule if task runs on another CPU
@@ -5082,7 +5067,7 @@ pfm_handle_work(void)
PFM_SET_WORK_PENDING(current, 0);
- pfm_clear_task_notify();
+ tsk_clear_notify_resume(current);
regs = task_pt_regs(current);
@@ -5450,7 +5435,7 @@ pfm_overflow_handler(struct task_struct
* when coming from ctxsw, current still points to the
* previous task, therefore we must work with task and not current.
*/
- pfm_set_task_notify(task);
+ tsk_set_notify_resume(task);
}
/*
* defer until state is changed (shorten spin window). the context is locked
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 2418289..94a92de 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -155,6 +155,15 @@ show_regs (struct pt_regs *regs)
show_stack(NULL, NULL);
}
+void tsk_clear_notify_resume(struct task_struct *tsk)
+{
+#ifdef CONFIG_PERFMON
+ if (tsk->thread.pfm_needs_checking)
+ return;
+#endif
+ clear_ti_thread_flag(task_thread_info(tsk), TIF_NOTIFY_RESUME);
+}
+
void
do_notify_resume_user (sigset_t *unused, struct sigscratch *scr, long in_syscall)
{
diff --git a/include/asm-ia64/thread_info.h b/include/asm-ia64/thread_info.h
index d16031e..5a2c479 100644
--- a/include/asm-ia64/thread_info.h
+++ b/include/asm-ia64/thread_info.h
@@ -71,6 +71,9 @@ #define __HAVE_ARCH_TASK_STRUCT_ALLOCATO
#define alloc_task_struct() ((struct task_struct *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER))
#define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
+#define tsk_set_notify_resume(tsk) \
+ set_ti_thread_flag(task_thread_info(tsk), TIF_NOTIFY_RESUME)
+extern void tsk_clear_notify_resume(struct task_struct *tsk);
#endif /* !__ASSEMBLY */
/*
@@ -85,7 +88,7 @@ #define TIF_SYSCALL_TRACE 2 /* syscall t
#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
-#define TIF_PERFMON_WORK 6 /* work for pfm_handle_work() */
+#define TIF_NOTIFY_RESUME 6 /* resumption notification requested */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE 17
#define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
@@ -97,7 +100,7 @@ #define _TIF_SYSCALL_AUDIT (1 << TIF_SYS
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP)
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
-#define _TIF_PERFMON_WORK (1 << TIF_PERFMON_WORK)
+#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
@@ -106,7 +109,7 @@ #define _TIF_DB_DISABLED (1 << TIF_DB_DI
#define _TIF_FREEZE (1 << TIF_FREEZE)
/* "work to do on user-return" bits */
-#define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_PERFMON_WORK|_TIF_SYSCALL_AUDIT|\
+#define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\
_TIF_NEED_RESCHED| _TIF_SYSCALL_TRACE|\
_TIF_RESTORE_SIGMASK)
/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
-
To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|