[IA64] Rename TIF_PERFMON_WORK back to TIF_NOTIFY_RESUME

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@intel.com>
Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
Signed-off-by: Tony Luck <tony.luck@intel.com>

3 files changed, 18 insertions, 21 deletions

diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 78acd9fe97e9..f6b99719f10f 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 *arg, int count, struct pt_regs *regs)
 
                 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 *task, pfm_context_t *ctx, u64 pmc0, str
                          * 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 7377d323131d..5c9efe626563 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -157,6 +157,15 @@ 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 d16031e72efa..5a2c47957069 100644
--- a/include/asm-ia64/thread_info.h
+++ b/include/asm-ia64/thread_info.h
@@ -71,6 +71,9 @@ struct thread_info {
 #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 @@ struct thread_info {
 #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 @@ struct thread_info {
 #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 @@ struct thread_info {
 #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 */